Merge pull request #417 from nirbheek/dll-paths

Fix filenames and paths used in DLL shared library generation

9 files changed, 562 insertions, 174 deletions

diff --git a/mesonbuild/backend/backends.py b/mesonbuild/backend/backends.py
index fcc3d3b..d2693b2 100644
--- a/mesonbuild/backend/backends.py
+++ b/mesonbuild/backend/backends.py
@@ -110,9 +110,13 @@ class Backend():
         # On some platforms (msvc for instance), the file that is used for
         # dynamic linking is not the same as the dynamic library itself. This
         # file is called an import library, and we want to link against that.
-        # On platforms where this distinction is not important, the import
-        # library is the same as the dynamic library itself.
-        return os.path.join(self.get_target_dir(target), target.get_import_filename())
+        # On all other platforms, we link to the library directly.
+        if isinstance(target, build.SharedLibrary):
+            link_lib = target.get_import_filename() or target.get_filename()
+            return os.path.join(self.get_target_dir(target), link_lib)
+        elif isinstance(target, build.StaticLibrary):
+            return os.path.join(self.get_target_dir(target), target.get_filename())
+        raise AssertionError('BUG: Tried to link to something that\'s not a library')
 
     def get_target_dir(self, target):
         if self.environment.coredata.get_builtin_option('layout') == 'mirror':
@@ -496,11 +500,19 @@ class Backend():
             if isinstance(i, build.Executable):
                 cmd += self.exe_object_to_cmd_array(i)
                 continue
-            if isinstance(i, build.CustomTarget):
+            elif isinstance(i, build.CustomTarget):
                 # GIR scanner will attempt to execute this binary but
                 # it assumes that it is in path, so always give it a full path.
                 tmp = i.get_filename()[0]
                 i = os.path.join(self.get_target_dir(i), tmp)
+            elif isinstance(i, mesonlib.File):
+                i = os.path.join(i.subdir, i.fname)
+                if absolute_paths:
+                    i = os.path.join(self.environment.get_build_dir(), i)
+            # FIXME: str types are blindly added and ignore the 'absolute_paths' argument
+            elif not isinstance(i, str):
+                err_msg = 'Argument {0} is of unknown type {1}'
+                raise RuntimeError(err_msg.format(str(i), str(type(i))))
             for (j, src) in enumerate(srcs):
                 i = i.replace('@INPUT%d@' % j, src)
             for (j, res) in enumerate(ofilenames):
diff --git a/mesonbuild/backend/ninjabackend.py b/mesonbuild/backend/ninjabackend.py
index a1bccc2..b84a144 100644
--- a/mesonbuild/backend/ninjabackend.py
+++ b/mesonbuild/backend/ninjabackend.py
@@ -496,18 +496,33 @@ int dummy;
         pickle.dump(d, ofile)
 
     def generate_target_install(self, d):
-        libdir = self.environment.get_libdir()
-        bindir = self.environment.get_bindir()
-
         should_strip = self.environment.coredata.get_builtin_option('strip')
         for t in self.build.get_targets().values():
             if t.should_install():
+                # Find the installation directory
                 outdir = t.get_custom_install_dir()
-                if outdir is None:
-                    if isinstance(t, build.Executable):
-                        outdir = bindir
-                    else:
-                        outdir = libdir
+                if outdir is not None:
+                    pass
+                elif isinstance(t, build.SharedLibrary):
+                    # For toolchains/platforms that need an import library for
+                    # linking (separate from the shared library with all the
+                    # code), we need to install the import library (dll.a/.lib)
+                    if t.get_import_filename():
+                        # Install the import library.
+                        i = [self.get_target_filename_for_linking(t),
+                             self.environment.get_import_lib_dir(),
+                             # It has no aliases, should not be stripped, and
+                             # doesn't have an install_rpath
+                             [], False, '']
+                        d.targets.append(i)
+                    outdir = self.environment.get_shared_lib_dir()
+                elif isinstance(t, build.SharedLibrary):
+                    outdir = self.environment.get_static_lib_dir()
+                elif isinstance(t, build.Executable):
+                    outdir = self.environment.get_bindir()
+                else:
+                    # XXX: Add BuildTarget-specific install dir cases here
+                    outdir = self.environment.get_libdir()
                 i = [self.get_target_filename(t), outdir, t.get_aliaslist(),\
                     should_strip, t.install_rpath]
                 d.targets.append(i)
@@ -1665,8 +1680,12 @@ rule FORTRAN_DEP_HACK
             else:
                 soversion = None
             commands += linker.get_soname_args(target.name, abspath, soversion)
+            # This is only visited when using the Visual Studio toolchain
             if target.vs_module_defs and hasattr(linker, 'gen_vs_module_defs_args'):
                 commands += linker.gen_vs_module_defs_args(target.vs_module_defs.rel_to_builddir(self.build_to_src))
+            # This is only visited when building for Windows using either MinGW/GCC or Visual Studio
+            if target.import_filename:
+                commands += linker.gen_import_library_args(os.path.join(target.subdir, target.import_filename))
         elif isinstance(target, build.StaticLibrary):
             commands += linker.get_std_link_args()
         else:
diff --git a/mesonbuild/backend/vs2010backend.py b/mesonbuild/backend/vs2010backend.py
index d262e6b..12f224c 100644
--- a/mesonbuild/backend/vs2010backend.py
+++ b/mesonbuild/backend/vs2010backend.py
@@ -28,6 +28,27 @@ import xml.dom.minidom
 from ..mesonlib import MesonException
 from ..environment import Environment
 
+def split_o_flags_args(args):
+    """
+    Splits any /O args and returns them. Does not take care of flags overriding
+    previous ones. Skips non-O flag arguments.
+
+    ['/Ox', '/Ob1'] returns ['/Ox', '/Ob1']
+    ['/Oxj', '/MP'] returns ['/Ox', '/Oj']
+    """
+    o_flags = []
+    for arg in args:
+        if not arg.startswith('/O'):
+            continue
+        flags = list(arg[2:])
+        # Assume that this one can't be clumped with the others since it takes
+        # an argument itself
+        if 'b' in flags:
+            o_flags.append(arg)
+        else:
+            o_flags += ['/O' + f for f in flags]
+    return o_flags
+
 class RegenInfo():
     def __init__(self, source_dir, build_dir, depfiles):
         self.source_dir = source_dir
@@ -76,9 +97,14 @@ class Vs2010Backend(backends.Backend):
         outputs = []
         custom_target_include_dirs = []
         custom_target_output_files = []
+        target_private_dir = self.relpath(self.get_target_private_dir(target), self.get_target_dir(target))
+        down = self.target_to_build_root(target)
         for genlist in target.get_generated_sources():
             if isinstance(genlist, build.CustomTarget):
-                custom_target_output_files += [os.path.join(self.get_target_dir(genlist), i) for i in genlist.output]
+                for i in genlist.output:
+                    # Path to the generated source from the current vcxproj dir via the build root
+                    ipath = os.path.join(down, self.get_target_dir(genlist), i)
+                    custom_target_output_files.append(ipath)
                 idir = self.relpath(self.get_target_dir(genlist), self.get_target_dir(target))
                 if idir not in custom_target_include_dirs:
                     custom_target_include_dirs.append(idir)
@@ -89,7 +115,6 @@ class Vs2010Backend(backends.Backend):
                 outfilelist = genlist.get_outfilelist()
                 exe_arr = self.exe_object_to_cmd_array(exe)
                 base_args = generator.get_arglist()
-                target_private_dir = self.relpath(self.get_target_private_dir(target), self.get_target_dir(target))
                 for i in range(len(infilelist)):
                     if len(infilelist) == len(outfilelist):
                         sole_output = os.path.join(target_private_dir, outfilelist[i])
@@ -123,7 +148,17 @@ class Vs2010Backend(backends.Backend):
     def generate(self, interp):
         self.resolve_source_conflicts()
         self.interpreter = interp
-        self.platform = 'Win32'
+        target_machine = self.interpreter.builtin['target_machine'].cpu_family_method(None, None)
+        if target_machine.endswith('64'):
+            # amd64 or x86_64
+            self.platform = 'x64'
+        elif target_machine == 'x86':
+            # x86
+            self.platform = 'Win32'
+        elif 'arm' in target_machine.lower():
+            self.platform = 'ARM'
+        else:
+            raise MesonException('Unsupported Visual Studio platform: ' + target_machine)
         self.buildtype = self.environment.coredata.get_builtin_option('buildtype')
         sln_filename = os.path.join(self.environment.get_build_dir(), self.build.project_name + '.sln')
         projlist = self.generate_projects()
@@ -404,6 +439,37 @@ class Vs2010Backend(backends.Backend):
     def quote_define_cmdline(cls, arg):
         return re.sub(r'^([-/])D(.*?)="(.*)"$', r'\1D\2=\"\3\"', arg)
 
+    @staticmethod
+    def split_link_args(args):
+        """
+        Split a list of link arguments into three lists:
+        * library search paths
+        * library filenames (or paths)
+        * other link arguments
+        """
+        lpaths = []
+        libs = []
+        other = []
+        for arg in args:
+            if arg.startswith('/LIBPATH:'):
+                lpath = arg[9:]
+                # De-dup library search paths by removing older entries when
+                # a new one is found. This is necessary because unlike other
+                # search paths such as the include path, the library is
+                # searched for in the newest (right-most) search path first.
+                if lpath in lpaths:
+                    lpaths.remove(lpath)
+                lpaths.append(lpath)
+            # It's ok if we miss libraries with non-standard extensions here.
+            # They will go into the general link arguments.
+            elif arg.endswith('.lib') or arg.endswith('.a'):
+                # De-dup
+                if arg not in libs:
+                    libs.append(arg)
+            else:
+                other.append(arg)
+        return (lpaths, libs, other)
+
     def gen_vcxproj(self, target, ofname, guid, compiler):
         mlog.debug('Generating vcxproj %s.' % target.name)
         entrypoint = 'WinMainCRTStartup'
@@ -424,11 +490,15 @@ class Vs2010Backend(backends.Backend):
             return self.gen_run_target_vcxproj(target, ofname, guid)
         else:
             raise MesonException('Unknown target type for %s' % target.get_basename())
+        # Prefix to use to access the build root from the vcxproj dir
         down = self.target_to_build_root(target)
+        # Prefix to use to access the source tree's root from the vcxproj dir
         proj_to_src_root = os.path.join(down, self.build_to_src)
+        # Prefix to use to access the source tree's subdir from the vcxproj dir
         proj_to_src_dir = os.path.join(proj_to_src_root, target.subdir)
         (sources, headers, objects, languages) = self.split_sources(target.sources)
-        buildtype = self.buildtype
+        buildtype_args = compiler.get_buildtype_args(self.buildtype)
+        buildtype_link_args = compiler.get_buildtype_linker_args(self.buildtype)
         project_name = target.name
         target_name = target.name
         root = ET.Element('Project', {'DefaultTargets' : "Build",
@@ -438,9 +508,10 @@ class Vs2010Backend(backends.Backend):
         prjconf = ET.SubElement(confitems, 'ProjectConfiguration',
                                 {'Include' : self.buildtype + '|' + self.platform})
         p = ET.SubElement(prjconf, 'Configuration')
-        p.text= buildtype
+        p.text= self.buildtype
         pl = ET.SubElement(prjconf, 'Platform')
         pl.text = self.platform
+        # Globals
         globalgroup = ET.SubElement(root, 'PropertyGroup', Label='Globals')
         guidelem = ET.SubElement(globalgroup, 'ProjectGuid')
         guidelem.text = guid
@@ -453,13 +524,68 @@ class Vs2010Backend(backends.Backend):
         pname= ET.SubElement(globalgroup, 'ProjectName')
         pname.text = project_name
         ET.SubElement(root, 'Import', Project='$(VCTargetsPath)\Microsoft.Cpp.Default.props')
+        # Start configuration
         type_config = ET.SubElement(root, 'PropertyGroup', Label='Configuration')
         ET.SubElement(type_config, 'ConfigurationType').text = conftype
         ET.SubElement(type_config, 'CharacterSet').text = 'MultiByte'
         if self.platform_toolset:
             ET.SubElement(type_config, 'PlatformToolset').text = self.platform_toolset
+        # FIXME: Meson's LTO support needs to be integrated here
         ET.SubElement(type_config, 'WholeProgramOptimization').text = 'false'
-        ET.SubElement(type_config, 'UseDebugLibraries').text = 'true'
+        # Let VS auto-set the RTC level
+        ET.SubElement(type_config, 'BasicRuntimeChecks').text = 'Default'
+        o_flags = split_o_flags_args(buildtype_args)
+        if '/Oi' in o_flags:
+            ET.SubElement(type_config, 'IntrinsicFunctions').text = 'true'
+        if '/Ob1' in o_flags:
+            ET.SubElement(type_config, 'InlineFunctionExpansion').text = 'OnlyExplicitInline'
+        elif '/Ob2' in o_flags:
+            ET.SubElement(type_config, 'InlineFunctionExpansion').text = 'AnySuitable'
+        # Size-preserving flags
+        if '/Os' in o_flags:
+            ET.SubElement(type_config, 'FavorSizeOrSpeed').text = 'Size'
+        else:
+            ET.SubElement(type_config, 'FavorSizeOrSpeed').text = 'Speed'
+        # Incremental linking increases code size
+        if '/INCREMENTAL:NO' in buildtype_link_args:
+            ET.SubElement(type_config, 'LinkIncremental').text = 'false'
+        # CRT type; debug or release
+        if '/MDd' in buildtype_args:
+            ET.SubElement(type_config, 'UseDebugLibraries').text = 'true'
+            ET.SubElement(type_config, 'RuntimeLibrary').text = 'MultiThreadedDebugDLL'
+        else:
+            ET.SubElement(type_config, 'UseDebugLibraries').text = 'false'
+            ET.SubElement(type_config, 'RuntimeLibrary').text = 'MultiThreadedDLL'
+        # Debug format
+        if '/ZI' in buildtype_args:
+            ET.SubElement(type_config, 'DebugInformationFormat').text = 'EditAndContinue'
+        elif '/Zi' in buildtype_args:
+            ET.SubElement(type_config, 'DebugInformationFormat').text = 'ProgramDatabase'
+        elif '/Z7' in buildtype_args:
+            ET.SubElement(type_config, 'DebugInformationFormat').text = 'OldStyle'
+        # Generate Debug info
+        if '/DEBUG' in buildtype_link_args:
+            ET.SubElement(type_config, 'GenerateDebugInformation').text = 'true'
+        # Runtime checks
+        if '/RTC1' in buildtype_args:
+            ET.SubElement(type_config, 'BasicRuntimeChecks').text = 'EnableFastChecks'
+        elif '/RTCu' in buildtype_args:
+            ET.SubElement(type_config, 'BasicRuntimeChecks').text = 'UninitializedLocalUsageCheck'
+        elif '/RTCs' in buildtype_args:
+            ET.SubElement(type_config, 'BasicRuntimeChecks').text = 'StackFrameRuntimeCheck'
+        # Optimization flags
+        if '/Ox' in o_flags:
+            ET.SubElement(type_config, 'Optimization').text = 'Full'
+        elif '/O2' in o_flags:
+            ET.SubElement(type_config, 'Optimization').text = 'MaxSpeed'
+        elif '/O1' in o_flags:
+            ET.SubElement(type_config, 'Optimization').text = 'MinSpace'
+        elif '/Od' in o_flags:
+            ET.SubElement(type_config, 'Optimization').text = 'Disabled'
+        # Warning level
+        warning_level = self.environment.coredata.get_builtin_option('warning_level')
+        ET.SubElement(type_config, 'WarningLevel').text = 'Level' + warning_level
+        # End configuration
         ET.SubElement(root, 'Import', Project='$(VCTargetsPath)\Microsoft.Cpp.props')
         generated_files, custom_target_output_files, generated_files_include_dirs = self.generate_custom_generator_commands(target, root)
         (gen_src, gen_hdrs, gen_objs, gen_langs) = self.split_sources(generated_files)
@@ -467,6 +593,7 @@ class Vs2010Backend(backends.Backend):
         gen_src += custom_src
         gen_hdrs += custom_hdrs
         gen_langs += custom_langs
+        # Project information
         direlem = ET.SubElement(root, 'PropertyGroup')
         fver = ET.SubElement(direlem, '_ProjectFileVersion')
         fver.text = self.project_file_version
@@ -474,15 +601,13 @@ class Vs2010Backend(backends.Backend):
         outdir.text = '.\\'
         intdir = ET.SubElement(direlem, 'IntDir')
         intdir.text = target.get_id() + '\\'
-        tname = ET.SubElement(direlem, 'TargetName')
-        tname.text = target_name
-        inclinc = ET.SubElement(direlem, 'LinkIncremental')
-        inclinc.text = 'true'
+        tfilename = os.path.splitext(target.get_filename())
+        ET.SubElement(direlem, 'TargetName').text = tfilename[0]
+        ET.SubElement(direlem, 'TargetExt').text = tfilename[1]
 
+        # Build information
         compiles = ET.SubElement(root, 'ItemDefinitionGroup')
         clconf = ET.SubElement(compiles, 'ClCompile')
-        opt = ET.SubElement(clconf, 'Optimization')
-        opt.text = 'disabled'
         inc_dirs = ['.', self.relpath(self.get_target_private_dir(target), self.get_target_dir(target)),
                     proj_to_src_dir] + generated_files_include_dirs
 
@@ -496,18 +621,24 @@ class Vs2010Backend(backends.Backend):
         for l, args in target.extra_args.items():
             if l in extra_args:
                 extra_args[l] += compiler.unix_compile_flags_to_native(args)
-        general_args = compiler.get_buildtype_args(self.buildtype).copy()
         # FIXME all the internal flags of VS (optimization etc) are represented
         # by their own XML elements. In theory we should split all flags to those
         # that have an XML element and those that don't and serialise them
         # properly. This is a crapton of work for no real gain, so just dump them
         # here.
-        general_args += compiler.get_option_compile_args(self.environment.coredata.compiler_options)
+        general_args = compiler.get_option_compile_args(self.environment.coredata.compiler_options)
         for d in target.get_external_deps():
-            try:
-                general_args += d.compile_args
-            except AttributeError:
-                pass
+            # Cflags required by external deps might have UNIX-specific flags,
+            # so filter them out if needed
+            d_compile_args = compiler.unix_compile_flags_to_native(d.get_compile_args())
+            for arg in d_compile_args:
+                if arg.startswith('-I'):
+                    inc_dir = arg[2:]
+                    # De-dup
+                    if inc_dir not in inc_dirs:
+                        inc_dirs.append(inc_dir)
+                else:
+                    general_args.append(arg)
 
         for l, args in extra_args.items():
             extra_args[l] = [Vs2010Backend.quote_define_cmdline(x) for x in args]
@@ -540,8 +671,6 @@ class Vs2010Backend(backends.Backend):
         preproc = ET.SubElement(clconf, 'PreprocessorDefinitions')
         rebuild = ET.SubElement(clconf, 'MinimalRebuild')
         rebuild.text = 'true'
-        rtlib = ET.SubElement(clconf, 'RuntimeLibrary')
-        rtlib.text = 'MultiThreadedDebugDLL'
         funclink = ET.SubElement(clconf, 'FunctionLevelLinking')
         funclink.text = 'true'
         pch_node = ET.SubElement(clconf, 'PrecompiledHeader')
@@ -564,28 +693,39 @@ class Vs2010Backend(backends.Backend):
             pch_out = ET.SubElement(clconf, 'PrecompiledHeaderOutputFile')
             pch_out.text = '$(IntDir)$(TargetName)-%s.pch' % pch_source[2]
 
-        warnings = ET.SubElement(clconf, 'WarningLevel')
-        warnings.text = 'Level3'
-        debinfo = ET.SubElement(clconf, 'DebugInformationFormat')
-        debinfo.text = 'EditAndContinue'
         resourcecompile = ET.SubElement(compiles, 'ResourceCompile')
         ET.SubElement(resourcecompile, 'PreprocessorDefinitions')
         link = ET.SubElement(compiles, 'Link')
         # Put all language args here, too.
         extra_link_args = compiler.get_option_link_args(self.environment.coredata.compiler_options)
+        # FIXME: Can these buildtype linker args be added as tags in the
+        # vcxproj file (similar to buildtype compiler args) instead of in
+        # AdditionalOptions?
         extra_link_args += compiler.get_buildtype_linker_args(self.buildtype)
         for l in self.environment.coredata.external_link_args.values():
-            extra_link_args += compiler.unix_link_flags_to_native(l)
-        extra_link_args += compiler.unix_link_flags_to_native(target.link_args)
+            extra_link_args += l
+        if not isinstance(target, build.StaticLibrary):
+            extra_link_args += target.link_args
+            # External deps must be last because target link libraries may depend on them.
+            for dep in target.get_external_deps():
+                extra_link_args += dep.get_link_args()
+            for d in target.get_dependencies():
+                if isinstance(d, build.StaticLibrary):
+                    for dep in d.get_external_deps():
+                        extra_link_args += dep.get_link_args()
+        extra_link_args = compiler.unix_link_flags_to_native(extra_link_args)
+        (additional_libpaths, additional_links, extra_link_args) = self.split_link_args(extra_link_args)
         if len(extra_link_args) > 0:
             extra_link_args.append('%(AdditionalOptions)')
             ET.SubElement(link, "AdditionalOptions").text = ' '.join(extra_link_args)
+        if len(additional_libpaths) > 0:
+            additional_libpaths.insert(0, '%(AdditionalLibraryDirectories)')
+            ET.SubElement(link, 'AdditionalLibraryDirectories').text = ';'.join(additional_libpaths)
 
-        additional_links = []
+        # Add more libraries to be linked if needed
         for t in target.get_dependencies():
             lobj = self.build.targets[t.get_id()]
-            rel_path = self.relpath(lobj.subdir, target.subdir)
-            linkname = os.path.join(rel_path, lobj.get_import_filename())
+            linkname = os.path.join(down, self.get_target_filename_for_linking(lobj))
             additional_links.append(linkname)
         for lib in self.get_custom_target_provided_libraries(target):
             additional_links.append(self.relpath(lib, self.get_target_dir(target)))
@@ -600,26 +740,37 @@ class Vs2010Backend(backends.Backend):
             ET.SubElement(link, 'AdditionalDependencies').text = ';'.join(additional_links)
         ofile = ET.SubElement(link, 'OutputFile')
         ofile.text = '$(OutDir)%s' % target.get_filename()
-        addlibdir = ET.SubElement(link, 'AdditionalLibraryDirectories')
-        addlibdir.text = '%(AdditionalLibraryDirectories)'
         subsys = ET.SubElement(link, 'SubSystem')
         subsys.text = subsystem
-        gendeb = ET.SubElement(link, 'GenerateDebugInformation')
-        gendeb.text = 'true'
         if isinstance(target, build.SharedLibrary):
+            # DLLs built with MSVC always have an import library except when
+            # they're data-only DLLs, but we don't support those yet.
             ET.SubElement(link, 'ImportLibrary').text = target.get_import_filename()
-        pdb = ET.SubElement(link, 'ProgramDataBaseFileName')
-        pdb.text = '$(OutDir}%s.pdb' % target_name
+            # Add module definitions file, if provided
+            if target.vs_module_defs:
+                relpath = os.path.join(down, target.vs_module_defs.rel_to_builddir(self.build_to_src))
+                ET.SubElement(link, 'ModuleDefinitionFile').text = relpath
+        if '/ZI' in buildtype_args or '/Zi' in buildtype_args:
+            pdb = ET.SubElement(link, 'ProgramDataBaseFileName')
+            pdb.text = '$(OutDir}%s.pdb' % target_name
         if isinstance(target, build.Executable):
             ET.SubElement(link, 'EntryPointSymbol').text = entrypoint
         targetmachine = ET.SubElement(link, 'TargetMachine')
-        targetmachine.text = 'MachineX86'
+        targetplatform = self.platform.lower()
+        if targetplatform == 'win32':
+            targetmachine.text = 'MachineX86'
+        elif targetplatform == 'x64':
+            targetmachine.text = 'MachineX64'
+        elif targetplatform == 'arm':
+            targetmachine.text = 'MachineARM'
+        else:
+            raise MesonException('Unsupported Visual Studio target machine: ' + targetmachine)
 
         extra_files = target.extra_files
         if len(headers) + len(gen_hdrs) + len(extra_files) > 0:
             inc_hdrs = ET.SubElement(root, 'ItemGroup')
             for h in headers:
-                relpath = h.rel_to_builddir(proj_to_src_root)
+                relpath = os.path.join(down, h.rel_to_builddir(self.build_to_src))
                 ET.SubElement(inc_hdrs, 'CLInclude', Include=relpath)
             for h in gen_hdrs:
                 ET.SubElement(inc_hdrs, 'CLInclude', Include=h)
@@ -630,7 +781,7 @@ class Vs2010Backend(backends.Backend):
         if len(sources) + len(gen_src) + len(pch_sources) > 0:
             inc_src = ET.SubElement(root, 'ItemGroup')
             for s in sources:
-                relpath = s.rel_to_builddir(proj_to_src_root)
+                relpath = os.path.join(down, s.rel_to_builddir(self.build_to_src))
                 inc_cl = ET.SubElement(inc_src, 'CLCompile', Include=relpath)
                 self.add_pch(inc_cl, proj_to_src_dir, pch_sources, s)
                 self.add_additional_options(s, inc_cl, extra_args, additional_options_set)
@@ -658,7 +809,7 @@ class Vs2010Backend(backends.Backend):
         if self.has_objects(objects, additional_objects, gen_objs):
             inc_objs = ET.SubElement(root, 'ItemGroup')
             for s in objects:
-                relpath = s.rel_to_builddir(proj_to_src_root)
+                relpath = os.path.join(down, s.rel_to_builddir(self.build_to_src))
                 ET.SubElement(inc_objs, 'Object', Include=relpath)
             for s in additional_objects:
                 ET.SubElement(inc_objs, 'Object', Include=s)
diff --git a/mesonbuild/backend/xcodebackend.py b/mesonbuild/backend/xcodebackend.py
index 0ce90ce..e64866d 100644
--- a/mesonbuild/backend/xcodebackend.py
+++ b/mesonbuild/backend/xcodebackend.py
@@ -292,12 +292,10 @@ class XCodeBackend(backends.Backend):
             reftype = 0
             if isinstance(t, build.Executable):
                 typestr = 'compiled.mach-o.executable'
-                path = t.get_filename()
+                path = fname
             elif isinstance(t, build.SharedLibrary):
-                # OSX has a completely different shared library
-                # naming scheme so do this manually.
                 typestr = self.get_xcodetype('dummy.dylib')
-                path = t.get_osx_filename()
+                path = fname
             else:
                 typestr = self.get_xcodetype(fname)
                 path = '"%s"' % t.get_filename()
@@ -626,7 +624,7 @@ class XCodeBackend(backends.Backend):
                         headerdirs.append(os.path.join(self.environment.get_build_dir(), cd))
                 for l in target.link_targets:
                     abs_path = os.path.join(self.environment.get_build_dir(),
-                                            l.subdir, buildtype, l.get_osx_filename())
+                                            l.subdir, buildtype, l.get_filename())
                     dep_libs.append("'%s'" % abs_path)
                     if isinstance(l, build.SharedLibrary):
                         links_dylib = True
diff --git a/mesonbuild/build.py b/mesonbuild/build.py
index c60f37f..b610bb8 100644
--- a/mesonbuild/build.py
+++ b/mesonbuild/build.py
@@ -16,8 +16,9 @@ from . import coredata
 from . import environment
 from . import dependencies
 from . import mlog
-import copy, os
+import copy, os, re
 from .mesonlib import File, flatten, MesonException
+from .environment import for_windows, for_darwin
 
 known_basic_kwargs = {'install' : True,
                       'c_pch' : True,
@@ -71,6 +72,38 @@ We are fully aware that these are not really usable or pleasant ways to do
 this but it's the best we can do given the way shell quoting works.
 '''
 
+def sources_are_suffix(sources, suffix):
+    for source in sources:
+        if source.endswith('.' + suffix):
+            return True
+    return False
+
+def compiler_is_msvc(sources, is_cross, env):
+    """
+    Since each target does not currently have the compiler information attached
+    to it, we must do this detection manually here.
+
+    This detection is purposely incomplete and will cause bugs if other code is
+    extended and this piece of code is forgotten.
+    """
+    compiler = None
+    if sources_are_suffix(sources, 'c'):
+        try:
+            compiler = env.detect_c_compiler(is_cross)
+        except MesonException:
+            return False
+    elif sources_are_suffix(sources, 'cxx') or \
+         sources_are_suffix(sources, 'cpp') or \
+         sources_are_suffix(sources, 'cc'):
+        try:
+            compiler = env.detect_cpp_compiler(is_cross)
+        except MesonException:
+            return False
+    if compiler and compiler.get_id() == 'msvc':
+        return True
+    return False
+
+
 class InvalidArguments(MesonException):
     pass
 
@@ -209,6 +242,10 @@ class BuildTarget():
             raise InvalidArguments('Build target %s has no sources.' % name)
         self.validate_sources()
 
+    def __repr__(self):
+        repr_str = "<{0} {1}: {2}>"
+        return repr_str.format(self.__class__.__name__, self.get_id(), self.filename)
+
     def get_id(self):
         # This ID must also be a valid file name on all OSs.
         # It should also avoid shell metacharacters for obvious
@@ -593,6 +630,10 @@ class Generator():
         self.exe = exe
         self.process_kwargs(kwargs)
 
+    def __repr__(self):
+        repr_str = "<{0}: {1}>"
+        return repr_str.format(self.__class__.__name__, self.exe)
+
     def get_exe(self):
         return self.exe
 
@@ -670,15 +711,19 @@ class GeneratedList():
 class Executable(BuildTarget):
     def __init__(self, name, subdir, subproject, is_cross, sources, objects, environment, kwargs):
         super().__init__(name, subdir, subproject, is_cross, sources, objects, environment, kwargs)
-        self.prefix = ''
-        self.suffix = environment.get_exe_suffix()
-        suffix = environment.get_exe_suffix()
-        if len(self.sources) > 0 and self.sources[0].endswith('.cs'):
-            suffix = 'exe'
-        if suffix != '':
-            self.filename = self.name + '.' + suffix
-        else:
-            self.filename = self.name
+        # Unless overriden, executables have no suffix or prefix. Except on
+        # Windows and with C#/Mono executables where the suffix is 'exe'
+        if not hasattr(self, 'prefix'):
+            self.prefix = ''
+        if not hasattr(self, 'suffix'):
+            # Executable for Windows or C#/Mono
+            if for_windows(is_cross, environment) or sources_are_suffix(self.sources, 'cs'):
+                self.suffix = 'exe'
+            else:
+                self.suffix = ''
+        self.filename = self.name
+        if self.suffix:
+            self.filename += '.' + self.suffix
 
     def type_suffix(self):
         return "@exe"
@@ -686,52 +731,161 @@ class Executable(BuildTarget):
 class StaticLibrary(BuildTarget):
     def __init__(self, name, subdir, subproject, is_cross, sources, objects, environment, kwargs):
         super().__init__(name, subdir, subproject, is_cross, sources, objects, environment, kwargs)
-        if len(self.sources) > 0 and self.sources[0].endswith('.cs'):
+        if sources_are_suffix(self.sources, 'cs'):
             raise InvalidArguments('Static libraries not supported for C#.')
+        # By default a static library is named libfoo.a even on Windows because
+        # MSVC does not have a consistent convention for what static libraries
+        # are called. The MSVC CRT uses libfoo.lib syntax but nothing else uses
+        # it and GCC only looks for static libraries called foo.lib and
+        # libfoo.a. However, we cannot use foo.lib because that's the same as
+        # the import library. Using libfoo.a is ok because people using MSVC
+        # always pass the library filename while linking anyway.
         if not hasattr(self, 'prefix'):
-            self.prefix = environment.get_static_lib_prefix()
-        self.suffix = environment.get_static_lib_suffix()
-        if len(self.sources) > 0 and self.sources[0].endswith('.rs'):
-            self.suffix = 'rlib'
+            self.prefix = 'lib'
+        if not hasattr(self, 'suffix'):
+            # Rust static library crates have .rlib suffix
+            if sources_are_suffix(self.sources, 'rs'):
+                self.suffix = 'rlib'
+            else:
+                self.suffix = 'a'
         self.filename = self.prefix + self.name + '.' + self.suffix
 
-    def get_import_filename(self):
-        return self.filename
-
-    def get_osx_filename(self):
-        return self.get_filename()
-
     def type_suffix(self):
         return "@sta"
 
 class SharedLibrary(BuildTarget):
     def __init__(self, name, subdir, subproject, is_cross, sources, objects, environment, kwargs):
-        self.version = None
         self.soversion = None
+        self.ltversion = None
         self.vs_module_defs = None
-        super().__init__(name, subdir, subproject, is_cross, sources, objects, environment, kwargs);
-        if len(self.sources) > 0 and self.sources[0].endswith('.cs'):
+        # The import library this target will generate
+        self.import_filename = None
+        # The import library that Visual Studio would generate (and accept)
+        self.vs_import_filename = None
+        # The import library that GCC would generate (and prefer)
+        self.gcc_import_filename = None
+        super().__init__(name, subdir, subproject, is_cross, sources, objects, environment, kwargs)
+        if not hasattr(self, 'prefix'):
+            self.prefix = None
+        if not hasattr(self, 'suffix'):
+            self.suffix = None
+        self.basic_filename_tpl = '{0.prefix}{0.name}.{0.suffix}'
+        self.determine_filenames(is_cross, environment)
+
+    def determine_filenames(self, is_cross, env):
+        """
+        See https://github.com/mesonbuild/meson/pull/417 for details.
+
+        First we determine the filename template (self.filename_tpl), then we
+        set the output filename (self.filename).
+
+        The template is needed while creating aliases (self.get_aliaslist),
+        which are needed while generating .so shared libraries for Linux.
+
+        Besides this, there's also the import library name, which is only used
+        on Windows since on that platform the linker uses a separate library
+        called the "import library" during linking instead of the shared
+        library (DLL). The toolchain will output an import library in one of
+        two formats: GCC or Visual Studio.
+
+        When we're building with Visual Studio, the import library that will be
+        generated by the toolchain is self.vs_import_filename, and with
+        MinGW/GCC, it's self.gcc_import_filename. self.import_filename will
+        always contain the import library name this target will generate.
+        """
+        prefix = ''
+        suffix = ''
+        self.filename_tpl = self.basic_filename_tpl
+        # If the user already provided the prefix and suffix to us, we don't
+        # need to do any filename suffix/prefix detection.
+        # NOTE: manual prefix/suffix override is currently only tested for C/C++
+        if self.prefix != None and self.suffix != None:
+            pass
+        # C# and Mono
+        elif sources_are_suffix(self.sources, 'cs'):
+            prefix = ''
+            suffix = 'dll'
+            self.filename_tpl = '{0.prefix}{0.name}.{0.suffix}'
+        # Rust
+        elif sources_are_suffix(self.sources, 'rs'):
+            # Currently, we always build --crate-type=rlib
             prefix = 'lib'
+            suffix = 'rlib'
+            self.filename_tpl = '{0.prefix}{0.name}.{0.suffix}'
+        # C, C++, Swift, Vala
+        # Only Windows uses a separate import library for linking
+        # For all other targets/platforms import_filename stays None
+        elif for_windows(is_cross, env):
             suffix = 'dll'
+            self.vs_import_filename = '{0}.lib'.format(self.name)
+            self.gcc_import_filename = 'lib{0}.dll.a'.format(self.name)
+            if compiler_is_msvc(self.sources, is_cross, env):
+                # Shared library is of the form foo.dll
+                prefix = ''
+                # Import library is called foo.lib
+                self.import_filename = self.vs_import_filename
+            # Assume GCC-compatible naming
+            else:
+                # Shared library is of the form libfoo.dll
+                prefix = 'lib'
+                # Import library is called libfoo.dll.a
+                self.import_filename = self.gcc_import_filename
+            # Shared library has the soversion if it is defined
+            if self.soversion:
+                self.filename_tpl = '{0.prefix}{0.name}-{0.soversion}.{0.suffix}'
+            else:
+                self.filename_tpl = '{0.prefix}{0.name}.{0.suffix}'
+        elif for_darwin(is_cross, env):
+            prefix = 'lib'
+            suffix = 'dylib'
+            if self.soversion:
+                # libfoo.X.dylib
+                self.filename_tpl = '{0.prefix}{0.name}.{0.soversion}.{0.suffix}'
+            else:
+                # libfoo.dylib
+                self.filename_tpl = '{0.prefix}{0.name}.{0.suffix}'
         else:
-            prefix = environment.get_shared_lib_prefix()
-            suffix = environment.get_shared_lib_suffix()
-        if not hasattr(self, 'prefix'):
-            self.prefix = prefix
-        if not hasattr(self, 'suffix'):
-            if len(self.sources) > 0 and self.sources[0].endswith('.rs'):
-                self.suffix = 'rlib'
+            prefix = 'lib'
+            suffix = 'so'
+            if self.ltversion:
+                # libfoo.so.X[.Y[.Z]] (.Y and .Z are optional)
+                self.filename_tpl = '{0.prefix}{0.name}.{0.suffix}.{0.ltversion}'
+            elif self.soversion:
+                # libfoo.so.X
+                self.filename_tpl = '{0.prefix}{0.name}.{0.suffix}.{0.soversion}'
             else:
-                self.suffix = suffix
-        self.importsuffix = environment.get_import_lib_suffix()
-        self.filename = self.prefix + self.name + '.' + self.suffix
+                # No versioning, libfoo.so
+                self.filename_tpl = '{0.prefix}{0.name}.{0.suffix}'
+        if self.prefix == None:
+            self.prefix = prefix
+        if self.suffix == None:
+            self.suffix = suffix
+        self.filename = self.filename_tpl.format(self)
 
     def process_kwargs(self, kwargs, environment):
         super().process_kwargs(kwargs, environment)
+        # Shared library version
         if 'version' in kwargs:
-            self.set_version(kwargs['version'])
+            self.ltversion = kwargs['version']
+            if not isinstance(self.ltversion, str):
+                raise InvalidArguments('Shared library version needs to be a string, not ' + type(self.ltversion).__name__)
+            if not re.fullmatch(r'[0-9]+(\.[0-9]+){0,2}', self.ltversion):
+                raise InvalidArguments('Invalid Shared library version "{0}". Must be of the form X.Y.Z where all three are numbers. Y and Z are optional.'.format(self.ltversion))
+        # Try to extract/deduce the soversion
         if 'soversion' in kwargs:
-            self.set_soversion(kwargs['soversion'])
+            self.soversion = kwargs['soversion']
+            if isinstance(self.soversion, int):
+                self.soversion = str(self.soversion)
+            if not isinstance(self.soversion, str):
+                raise InvalidArguments('Shared library soversion is not a string or integer.')
+            try:
+                int(self.soversion)
+            except ValueError:
+                raise InvalidArguments('Shared library soversion must be a valid integer')
+        elif self.ltversion:
+            # library version is defined, get the soversion from that
+            self.soversion = self.ltversion.split('.')[0]
+        # Visual Studio module-definitions file
         if 'vs_module_defs' in kwargs:
             path = kwargs['vs_module_defs']
             if (os.path.isabs(path)):
@@ -742,46 +896,41 @@ class SharedLibrary(BuildTarget):
     def check_unknown_kwargs(self, kwargs):
         self.check_unknown_kwargs_int(kwargs, known_shlib_kwargs)
 
-    def get_shbase(self):
-        return self.prefix + self.name + '.' + self.suffix
-
     def get_import_filename(self):
-        return self.prefix + self.name + '.' + self.importsuffix
+        """
+        The name of the import library that will be outputted by the compiler
 
-    def get_all_link_deps(self):
-        return [self] + self.get_transitive_link_deps()
-
-    def get_filename(self):
-        '''Works on all platforms except OSX, which does its own thing.'''
-        fname = self.get_shbase()
-        if self.version is None:
-            return fname
-        else:
-            return fname + '.' + self.version
-
-    def get_osx_filename(self):
-        if self.version is None:
-            return self.get_shbase()
-        return self.prefix + self.name + '.' + self.version + '.' + self.suffix
+        Returns None if there is no import library required for this platform
+        """
+        return self.import_filename
 
-    def set_version(self, version):
-        if not isinstance(version, str):
-            raise InvalidArguments('Shared library version is not a string.')
-        self.version = version
+    def get_import_filenameslist(self):
+        if self.import_filename:
+            return [self.vs_import_filename, self.gcc_import_filename]
+        return []
 
-    def set_soversion(self, version):
-        if isinstance(version, int):
-            version = str(version)
-        if not isinstance(version, str):
-            raise InvalidArguments('Shared library soversion is not a string or integer.')
-        self.soversion = version
+    def get_all_link_deps(self):
+        return [self] + self.get_transitive_link_deps()
 
     def get_aliaslist(self):
-        aliases = []
-        if self.soversion is not None:
-            aliases.append(self.get_shbase() + '.' + self.soversion)
-        if self.version is not None:
-            aliases.append(self.get_shbase())
+        """
+        If the versioned library name is libfoo.so.0.100.0, aliases are:
+        * libfoo.so.0 (soversion)
+        * libfoo.so (unversioned; for linking)
+        """
+        # Aliases are only useful with .so libraries. Also if the .so library
+        # ends with .so (no versioning), we don't need aliases.
+        if self.suffix != 'so' or self.filename.endswith('.so'):
+            return []
+        # Unversioned alias: libfoo.so
+        aliases = [self.basic_filename_tpl.format(self)]
+        # If ltversion != soversion we create an soversion alias: libfoo.so.X
+        if self.ltversion and self.ltversion != self.soversion:
+            if not self.soversion:
+                # This is done in self.process_kwargs()
+                raise AssertionError('BUG: If library version is defined, soversion must have been defined')
+            alias_tpl = self.filename_tpl.replace('ltversion', 'soversion')
+            aliases.append(alias_tpl.format(self))
         return aliases
 
     def type_suffix(self):
@@ -815,6 +964,10 @@ class CustomTarget:
             mlog.log(mlog.bold('Warning:'), 'Unknown keyword arguments in target %s: %s' %
                      (self.name, ', '.join(unknowns)))
 
+    def __repr__(self):
+        repr_str = "<{0} {1}: {2}>"
+        return repr_str.format(self.__class__.__name__, self.get_id(), self.command)
+
     def get_id(self):
         return self.name + self.type_suffix()
 
@@ -851,7 +1004,7 @@ class CustomTarget:
         for i, c in enumerate(cmd):
             if hasattr(c, 'held_object'):
                 c = c.held_object
-            if isinstance(c, str):
+            if isinstance(c, str) or isinstance(c, File):
                 final_cmd.append(c)
             elif isinstance(c, dependencies.ExternalProgram):
                 if not c.found():
@@ -867,8 +1020,6 @@ class CustomTarget:
                     if not isinstance(s, str):
                         raise InvalidArguments('Array as argument %d contains a non-string.' % i)
                     final_cmd.append(s)
-            elif isinstance(c, File):
-                final_cmd.append(os.path.join(c.subdir, c.fname))
             else:
                 raise InvalidArguments('Argument %s in "command" is invalid.' % i)
         self.command = final_cmd
@@ -944,6 +1095,10 @@ class RunTarget:
         self.dependencies = dependencies
         self.subdir = subdir
 
+    def __repr__(self):
+        repr_str = "<{0} {1}: {2}>"
+        return repr_str.format(self.__class__.__name__, self.get_id(), self.command)
+
     def get_id(self):
         return self.name + self.type_suffix()
 
@@ -994,6 +1149,12 @@ class ConfigureFile():
         self.targetname = targetname
         self.configuration_data = configuration_data
 
+    def __repr__(self):
+        repr_str = "<{0}: {1} -> {2}>"
+        src = os.path.join(self.subdir, self.sourcename)
+        dst = os.path.join(self.subdir, self.targetname)
+        return repr_str.format(self.__class__.__name__, src, dst)
+
     def get_configuration_data(self):
         return self.configuration_data
 
@@ -1011,6 +1172,9 @@ class ConfigurationData():
         super().__init__()
         self.values = {}
 
+    def __repr__(self):
+        return repr(self.values)
+
     def get(self, name):
         return self.values[name]
 
diff --git a/mesonbuild/compilers.py b/mesonbuild/compilers.py
index 8ee86bc..55a4384 100644
--- a/mesonbuild/compilers.py
+++ b/mesonbuild/compilers.py
@@ -274,6 +274,13 @@ class Compiler():
     def get_linker_always_args(self):
         return []
 
+    def gen_import_library_args(self, implibname):
+        """
+        Used only on Windows for libraries that need an import library.
+        This currently means C, C++, Fortran.
+        """
+        return []
+
     def get_options(self):
         return {} # build afresh every time
 
@@ -473,6 +480,14 @@ class CCompiler(Compiler):
     def get_linker_search_args(self, dirname):
         return ['-L'+dirname]
 
+    def gen_import_library_args(self, implibname):
+        """
+        The name of the outputted import library
+
+        This implementation is used only on Windows by compilers that use GNU ld
+        """
+        return ['-Wl,--out-implib=' + implibname]
+
     def sanity_check_impl(self, work_dir, environment, sname, code):
         mlog.debug('Sanity testing ' + self.language + ' compiler:', ' '.join(self.exelist))
         mlog.debug('Is cross compiler: %s.' % str(self.is_cross))
@@ -1499,6 +1514,10 @@ class VisualStudioCCompiler(CCompiler):
         objname = os.path.splitext(pchname)[0] + '.obj'
         return (objname, ['/Yc' + header, '/Fp' + pchname, '/Fo' + objname ])
 
+    def gen_import_library_args(self, implibname):
+        "The name of the outputted import library"
+        return ['/IMPLIB:' + implibname]
+
     def build_rpath_args(self, build_dir, rpath_paths, install_rpath):
         return []
 
@@ -2057,6 +2076,14 @@ class GnuFortranCompiler(FortranCompiler):
     def get_always_args(self):
         return ['-pipe']
 
+    def gen_import_library_args(self, implibname):
+        """
+        The name of the outputted import library
+
+        Used only on Windows
+        """
+        return ['-Wl,--out-implib=' + implibname]
+
 class G95FortranCompiler(FortranCompiler):
     def __init__(self, exelist, version, is_cross, exe_wrapper=None):
         super().__init__(exelist, version, is_cross, exe_wrapper=None)
@@ -2068,6 +2095,14 @@ class G95FortranCompiler(FortranCompiler):
     def get_always_args(self):
         return ['-pipe']
 
+    def gen_import_library_args(self, implibname):
+        """
+        The name of the outputted import library
+
+        Used only on Windows
+        """
+        return ['-Wl,--out-implib=' + implibname]
+
 class SunFortranCompiler(FortranCompiler):
     def __init__(self, exelist, version, is_cross, exe_wrapper=None):
         super().__init__(exelist, version, is_cross, exe_wrapper=None)
diff --git a/mesonbuild/environment.py b/mesonbuild/environment.py
index 3868301..47414ca 100644
--- a/mesonbuild/environment.py
+++ b/mesonbuild/environment.py
@@ -80,11 +80,37 @@ def detect_system():
     return platform.system().lower()
 
 
+def for_windows(is_cross, env):
+    """
+    Host machine is windows?
+
+    Note: 'host' is the machine on which compiled binaries will run
+    """
+    if not is_cross:
+        return mesonlib.is_windows()
+    elif env.cross_info.has_host():
+        return env.cross_info.config['host_machine']['system'] == 'windows'
+    return False
+
+def for_darwin(is_cross, env):
+    """
+    Host machine is Darwin (iOS/OS X)?
+
+    Note: 'host' is the machine on which compiled binaries will run
+    """
+    if not is_cross:
+        return mesonlib.is_osx()
+    elif env.cross_info.has_host():
+        return env.cross_info.config['host_machine']['system'] == 'darwin'
+    return False
+
+
 class Environment():
     private_dir = 'meson-private'
     log_dir = 'meson-logs'
     coredata_file = os.path.join(private_dir, 'coredata.dat')
     version_regex = '\d+(\.\d+)+(-[a-zA-Z0-9]+)?'
+
     def __init__(self, source_dir, build_dir, main_script_file, options, original_cmd_line_args):
         assert(os.path.isabs(main_script_file))
         assert(not os.path.islink(main_script_file))
@@ -122,33 +148,22 @@ class Environment():
         self.default_static_linker = 'ar'
         self.vs_static_linker = 'lib'
 
+        # Various prefixes and suffixes for import libraries, shared libraries,
+        # static libraries, and executables.
+        # Versioning is added to these names in the backends as-needed.
         cross = self.is_cross_build()
         if (not cross and mesonlib.is_windows()) \
         or (cross and self.cross_info.has_host() and self.cross_info.config['host_machine']['system'] == 'windows'):
             self.exe_suffix = 'exe'
-            if self.detect_c_compiler(cross).get_id() == 'msvc':
-                self.import_lib_suffix = 'lib'
-            else:
-                # MinGW-GCC doesn't generate and can't link with a .lib
-                # It uses the DLL file as the import library
-                self.import_lib_suffix = 'dll'
-            self.shared_lib_suffix = 'dll'
-            self.shared_lib_prefix = ''
-            self.static_lib_suffix = 'lib'
-            self.static_lib_prefix = ''
             self.object_suffix = 'obj'
+            self.shared_lib_dir = self.get_bindir()
         else:
             self.exe_suffix = ''
-            if (not cross and mesonlib.is_osx()) or \
-            (cross and self.cross_info.has_host() and self.cross_info.config['host_machine']['system'] == 'darwin'):
-                self.shared_lib_suffix = 'dylib'
-            else:
-                self.shared_lib_suffix = 'so'
-            self.shared_lib_prefix = 'lib'
-            self.static_lib_suffix = 'a'
-            self.static_lib_prefix = 'lib'
             self.object_suffix = 'o'
-            self.import_lib_suffix = self.shared_lib_suffix
+            self.shared_lib_dir = self.get_libdir()
+        # Common to all platforms
+        self.import_lib_dir = self.get_libdir()
+        self.static_lib_dir = self.get_libdir()
 
     def is_cross_build(self):
         return self.cross_info is not None
@@ -641,22 +656,17 @@ class Environment():
     def get_exe_suffix(self):
         return self.exe_suffix
 
-    # On Windows (MSVC) the library has suffix dll
-    # but you link against a file that has suffix lib.
-    def get_import_lib_suffix(self):
-        return self.import_lib_suffix
+    def get_import_lib_dir(self):
+        "Install dir for the import library (library used for linking)"
+        return self.import_lib_dir
 
-    def get_shared_lib_prefix(self):
-        return self.shared_lib_prefix
+    def get_shared_lib_dir(self):
+        "Install dir for the shared library"
+        return self.shared_lib_dir
 
-    def get_shared_lib_suffix(self):
-        return self.shared_lib_suffix
-
-    def get_static_lib_prefix(self):
-        return self.static_lib_prefix
-
-    def get_static_lib_suffix(self):
-        return self.static_lib_suffix
+    def get_static_lib_dir(self):
+        "Install dir for the static library"
+        return self.static_lib_dir
 
     def get_object_suffix(self):
         return self.object_suffix
@@ -682,17 +692,6 @@ class Environment():
     def get_datadir(self):
         return self.coredata.get_builtin_option('datadir')
 
-    def find_library(self, libname, dirs):
-        if dirs is None:
-            dirs = mesonlib.get_library_dirs()
-        suffixes = [self.get_shared_lib_suffix(), self.get_static_lib_suffix()]
-        prefix = self.get_shared_lib_prefix()
-        for d in dirs:
-            for suffix in suffixes:
-                trial = os.path.join(d, prefix + libname + '.' + suffix)
-                if os.path.isfile(trial):
-                    return trial
-
 
 def get_args_from_envvars(lang):
     if lang == 'c':
diff --git a/mesonbuild/mesonlib.py b/mesonbuild/mesonlib.py
index 837f78a..1672d95 100644
--- a/mesonbuild/mesonlib.py
+++ b/mesonbuild/mesonlib.py
@@ -28,6 +28,16 @@ class File:
         self.subdir = subdir
         self.fname = fname
 
+    def __str__(self):
+        return os.path.join(self.subdir, self.fname)
+
+    def __repr__(self):
+        ret = '<File: {0}'
+        if not self.is_built:
+            ret += ' (not built)'
+        ret += '>'
+        return ret.format(os.path.join(self.subdir, self.fname))
+
     @staticmethod
     def from_source_file(source_root, subdir, fname):
         if not os.path.isfile(os.path.join(source_root, subdir, fname)):
diff --git a/mesonbuild/scripts/meson_install.py b/mesonbuild/scripts/meson_install.py
index 1de5a00..1924b95 100644
--- a/mesonbuild/scripts/meson_install.py
+++ b/mesonbuild/scripts/meson_install.py
@@ -52,7 +52,7 @@ def do_install(datafilename):
 
 def install_subdirs(data):
     for (src_dir, inst_dir, dst_dir) in data.install_subdirs:
-        if src_dir.endswith('/'):
+        if src_dir.endswith('/') or src_dir.endswith('\\'):
             src_dir = src_dir[:-1]
         src_prefix = os.path.join(src_dir, inst_dir)
         print('Installing subdir %s to %s.' % (src_prefix, dst_dir))