Use correct shared library naming for Cygwin

Use correct shared library naming for Cygwin when building and installing

2 files changed, 36 insertions, 2 deletions

diff --git a/mesonbuild/build.py b/mesonbuild/build.py
index 1246f3e..895cc7f 100644
--- a/mesonbuild/build.py
+++ b/mesonbuild/build.py
@@ -21,7 +21,7 @@ from . import mlog
 from .mesonlib import File, MesonException
 from .mesonlib import flatten, stringlistify, classify_unity_sources
 from .mesonlib import get_filenames_templates_dict, substitute_values
-from .environment import for_windows, for_darwin
+from .environment import for_windows, for_darwin, for_cygwin
 from .compilers import is_object, clike_langs, sort_clike, lang_suffixes
 
 known_basic_kwargs = {'install': True,
@@ -1120,6 +1120,18 @@ class SharedLibrary(BuildTarget):
                 self.filename_tpl = '{0.prefix}{0.name}-{0.soversion}.{0.suffix}'
             else:
                 self.filename_tpl = '{0.prefix}{0.name}.{0.suffix}'
+        elif for_cygwin(is_cross, env):
+            suffix = 'dll'
+            self.gcc_import_filename = 'lib{0}.dll.a'.format(self.name)
+            # Shared library is of the form cygfoo.dll
+            # (ld --dll-search-prefix=cyg is the default)
+            prefix = 'cyg'
+            # Import library is called libfoo.dll.a
+            self.import_filename = self.gcc_import_filename
+            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'
diff --git a/mesonbuild/environment.py b/mesonbuild/environment.py
index 7ae53fc..7861612 100644
--- a/mesonbuild/environment.py
+++ b/mesonbuild/environment.py
@@ -158,7 +158,10 @@ def detect_cpu(compilers):
     return trial
 
 def detect_system():
-    return platform.system().lower()
+    system = platform.system().lower()
+    if system.startswith('cygwin'):
+        return 'cygwin'
+    return system
 
 
 def for_windows(is_cross, env):
@@ -173,6 +176,20 @@ def for_windows(is_cross, env):
         return env.cross_info.config['host_machine']['system'] == 'windows'
     return False
 
+
+def for_cygwin(is_cross, env):
+    """
+    Host machine is cygwin?
+
+    Note: 'host' is the machine on which compiled binaries will run
+    """
+    if not is_cross:
+        return mesonlib.is_cygwin()
+    elif env.cross_info.has_host():
+        return env.cross_info.config['host_machine']['system'] == 'cygwin'
+    return False
+
+
 def for_darwin(is_cross, env):
     """
     Host machine is Darwin (iOS/OS X)?
@@ -257,6 +274,11 @@ class Environment:
             self.exe_suffix = 'exe'
             self.object_suffix = 'obj'
             self.win_libdir_layout = True
+        elif (not cross and mesonlib.is_cygwin()) \
+                or (cross and self.cross_info.has_host() and self.cross_info.config['host_machine']['system'] == 'cygwin'):
+            self.exe_suffix = 'exe'
+            self.object_suffix = 'o'
+            self.win_libdir_layout = True
         else:
             self.exe_suffix = ''
             self.object_suffix = 'o'