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author	Xavier Claessens <xavier.claessens@collabora.com>	2020-04-29 09:58:51 -0400
committer	Xavier Claessens <xavier.claessens@collabora.com>	2020-04-30 09:40:35 -0400
commit	9ddbcd301a601ffb7a271ff583f0ef16464114f5 (patch)
tree	b15dce1f009b000ae5bf55e1cee1d15fb8cab9f4 /docs/markdown/Simd-module.md
parent	c5d2299caca3f3ca9b8e568c6b6045aed2f00124 (diff)
download	meson-9ddbcd301a601ffb7a271ff583f0ef16464114f5.zip meson-9ddbcd301a601ffb7a271ff583f0ef16464114f5.tar.gz meson-9ddbcd301a601ffb7a271ff583f0ef16464114f5.tar.bz2

ExternalProgram: Do special windows tricks even when name is provided

Closes: #7051

Diffstat (limited to 'docs/markdown/Simd-module.md')

0 files changed, 0 insertions, 0 deletions

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# Copyright 2012-2017 The Meson development team

# Licensed under the Apache License, Version 2.0 (the "License");
# you may not use this file except in compliance with the License.
# You may obtain a copy of the License at

#     http://www.apache.org/licenses/LICENSE-2.0

# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS,
# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
# See the License for the specific language governing permissions and
# limitations under the License.

import subprocess, os.path, tempfile

from .. import mlog
from .. import coredata
from . import compilers
from ..mesonlib import (
    EnvironmentException, version_compare, Popen_safe, listify,
    for_windows, for_darwin, for_cygwin, for_haiku,
)

from .compilers import (
    GCC_MINGW,
    get_largefile_args,
    gnu_winlibs,
    msvc_buildtype_args,
    msvc_buildtype_linker_args,
    msvc_winlibs,
    vs32_instruction_set_args,
    vs64_instruction_set_args,
    ClangCompiler,
    Compiler,
    CompilerArgs,
    CrossNoRunException,
    GnuCompiler,
    IntelCompiler,
    RunResult,
)


class CCompiler(Compiler):
    def __init__(self, exelist, version, is_cross, exe_wrapper=None, **kwargs):
        # If a child ObjC or CPP class has already set it, don't set it ourselves
        if not hasattr(self, 'language'):
            self.language = 'c'
        super().__init__(exelist, version, **kwargs)
        self.id = 'unknown'
        self.is_cross = is_cross
        self.can_compile_suffixes.add('h')
        if isinstance(exe_wrapper, str):
            self.exe_wrapper = [exe_wrapper]
        else:
            self.exe_wrapper = exe_wrapper

    def needs_static_linker(self):
        return True # When compiling static libraries, so yes.

    def get_always_args(self):
        '''
        Args that are always-on for all C compilers other than MSVC
        '''
        return ['-pipe'] + get_largefile_args(self)

    def get_linker_debug_crt_args(self):
        """
        Arguments needed to select a debug crt for the linker
        This is only needed for MSVC
        """
        return []

    def get_no_stdinc_args(self):
        return ['-nostdinc']

    def get_no_stdlib_link_args(self):
        return ['-nostdlib']

    def get_warn_args(self, level):
        return self.warn_args[level]

    def get_no_warn_args(self):
        # Almost every compiler uses this for disabling warnings
        return ['-w']

    def get_soname_args(self, prefix, shlib_name, suffix, path, soversion, is_shared_module):
        return []

    def split_shlib_to_parts(self, fname):
        return None, fname

    # The default behavior is this, override in MSVC
    def build_rpath_args(self, build_dir, from_dir, rpath_paths, build_rpath, install_rpath):
        if self.id == 'clang' and self.clang_type == compilers.CLANG_OSX:
            return self.build_osx_rpath_args(build_dir, rpath_paths, build_rpath)
        return self.build_unix_rpath_args(build_dir, from_dir, rpath_paths, build_rpath, install_rpath)

    def get_dependency_gen_args(self, outtarget, outfile):
        return ['-MD', '-MQ', outtarget, '-MF', outfile]

    def depfile_for_object(self, objfile):
        return objfile + '.' + self.get_depfile_suffix()

    def get_depfile_suffix(self):
        return 'd'

    def get_exelist(self):
        return self.exelist[:]

    def get_linker_exelist(self):
        return self.exelist[:]

    def get_preprocess_only_args(self):
        return ['-E', '-P']

    def get_compile_only_args(self):
        return ['-c']

    def get_no_optimization_args(self):
        return ['-O0']

    def get_compiler_check_args(self):
        '''
        Get arguments useful for compiler checks such as being permissive in
        the code quality and not doing any optimization.
        '''
        return self.get_no_optimization_args()

    def get_output_args(self, target):
        return ['-o', target]

    def get_linker_output_args(self, outputname):
        return ['-o', outputname]

    def get_coverage_args(self):
        return ['--coverage']

    def get_coverage_link_args(self):
        return ['--coverage']

    def get_werror_args(self):
        return ['-Werror']

    def get_std_exe_link_args(self):
        return []

    def get_include_args(self, path, is_system):
        if path == '':
            path = '.'
        if is_system:
            return ['-isystem', path]
        return ['-I' + path]

    def get_std_shared_lib_link_args(self):
        return ['-shared']

    def get_library_dirs(self):
        env = os.environ.copy()
        env['LC_ALL'] = 'C'
        stdo = Popen_safe(self.exelist + ['--print-search-dirs'], env=env)[1]
        for line in stdo.split('\n'):
            if line.startswith('libraries:'):
                libstr = line.split('=', 1)[1]
                return libstr.split(':')
        return []

    def get_pic_args(self):
        return ['-fPIC']

    def name_string(self):
        return ' '.join(self.exelist)

    def get_pch_use_args(self, pch_dir, header):
        return ['-include', os.path.basename(header)]

    def get_pch_name(self, header_name):
        return os.path.basename(header_name) + '.' + self.get_pch_suffix()

    def get_linker_search_args(self, dirname):
        return ['-L' + dirname]

    def get_default_include_dirs(self):
        return []

    def gen_export_dynamic_link_args(self, env):
        if for_windows(env.is_cross_build(), env) or for_cygwin(env.is_cross_build(), env):
            return ['-Wl,--export-all-symbols']
        elif for_darwin(env.is_cross_build(), env):
            return []
        else:
            return ['-Wl,-export-dynamic']

    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.get_display_language() + ' compiler:', ' '.join(self.exelist))
        mlog.debug('Is cross compiler: %s.' % str(self.is_cross))

        extra_flags = []
        source_name = os.path.join(work_dir, sname)
        binname = sname.rsplit('.', 1)[0]
        if self.is_cross:
            binname += '_cross'
            if self.exe_wrapper is None:
                # Linking cross built apps is painful. You can't really
                # tell if you should use -nostdlib or not and for example
                # on OSX the compiler binary is the same but you need
                # a ton of compiler flags to differentiate between
                # arm and x86_64. So just compile.
                extra_flags += self.get_cross_extra_flags(environment, link=False)
                extra_flags += self.get_compile_only_args()
            else:
                extra_flags += self.get_cross_extra_flags(environment, link=True)
        # Is a valid executable output for all toolchains and platforms
        binname += '.exe'
        # Write binary check source
        binary_name = os.path.join(work_dir, binname)
        with open(source_name, 'w') as ofile:
            ofile.write(code)
        # Compile sanity check
        cmdlist = self.exelist + extra_flags + [source_name] + self.get_output_args(binary_name)
        pc, stdo, stde = Popen_safe(cmdlist, cwd=work_dir)
        mlog.debug('Sanity check compiler command line:', ' '.join(cmdlist))
        mlog.debug('Sanity check compile stdout:')
        mlog.debug(stdo)
        mlog.debug('-----\nSanity check compile stderr:')
        mlog.debug(stde)
        mlog.debug('-----')
        if pc.returncode != 0:
            raise EnvironmentException('Compiler {0} can not compile programs.'.format(self.name_string()))
        # Run sanity check
        if self.is_cross:
            if self.exe_wrapper is None:
                # Can't check if the binaries run so we have to assume they do
                return
            cmdlist = self.exe_wrapper + [binary_name]
        else:
            cmdlist = [binary_name]
        mlog.debug('Running test binary command: ' + ' '.join(cmdlist))
        pe = subprocess.Popen(cmdlist)
        pe.wait()
        if pe.returncode != 0:
            raise EnvironmentException('Executables created by {0} compiler {1} are not runnable.'.format(self.language, self.name_string()))

    def sanity_check(self, work_dir, environment):
        code = 'int main(int argc, char **argv) { int class=0; return class; }\n'
        return self.sanity_check_impl(work_dir, environment, 'sanitycheckc.c', code)

    def has_header(self, hname, prefix, env, extra_args=None, dependencies=None):
        fargs = {'prefix': prefix, 'header': hname}
        code = '''{prefix}
        #ifdef __has_include
         #if !__has_include("{header}")
          #error "Header '{header}' could not be found"
         #endif
        #else
         #include <{header}>
        #endif'''
        return self.compiles(code.format(**fargs), env, extra_args,
                             dependencies, 'preprocess')

    def has_header_symbol(self, hname, symbol, prefix, env, extra_args=None, dependencies=None):
        fargs = {'prefix': prefix, 'header': hname, 'symbol': symbol}
        t = '''{prefix}
        #include <{header}>
        int main () {{
            /* If it's not defined as a macro, try to use as a symbol */
            #ifndef {symbol}
                {symbol};
            #endif
        }}'''
        return self.compiles(t.format(**fargs), env, extra_args, dependencies)

    def _get_compiler_check_args(self, env, extra_args, dependencies, mode='compile'):
        if extra_args is None:
            extra_args = []
        elif isinstance(extra_args, str):
            extra_args = [extra_args]
        if dependencies is None:
            dependencies = []
        elif not isinstance(dependencies, list):
            dependencies = [dependencies]
        # Collect compiler arguments
        args = CompilerArgs(self)
        for d in dependencies:
            # Add compile flags needed by dependencies
            args += d.get_compile_args()
            if d.need_threads():
                args += self.thread_flags(env)
            if mode == 'link':
                # Add link flags needed to find dependencies
                args += d.get_link_args()
                if d.need_threads():
                    args += self.thread_link_flags(env)
        # Select a CRT if needed since we're linking
        if mode == 'link':
            args += self.get_linker_debug_crt_args()
        # Read c_args/cpp_args/etc from the cross-info file (if needed)
        args += self.get_cross_extra_flags(env, link=(mode == 'link'))
        if not self.is_cross:
            if mode == 'preprocess':
                # Add CPPFLAGS from the env.
                args += env.coredata.external_preprocess_args[self.language]
            elif mode == 'compile':
                # Add CFLAGS/CXXFLAGS/OBJCFLAGS/OBJCXXFLAGS from the env
                args += env.coredata.external_args[self.language]
            elif mode == 'link':
                # Add LDFLAGS from the env
                args += env.coredata.external_link_args[self.language]
        args += self.get_compiler_check_args()
        # extra_args must override all other arguments, so we add them last
        args += extra_args
        return args

    def compiles(self, code, env, extra_args=None, dependencies=None, mode='compile'):
        args = self._get_compiler_check_args(env, extra_args, dependencies, mode)
        # We only want to compile; not link
        with self.compile(code, args.to_native(), mode) as p:
            return p.returncode == 0

    def _links_wrapper(self, code, env, extra_args, dependencies):
        "Shares common code between self.links and self.run"
        args = self._get_compiler_check_args(env, extra_args, dependencies, mode='link')
        return self.compile(code, args)

    def links(self, code, env, extra_args=None, dependencies=None):
        with self._links_wrapper(code, env, extra_args, dependencies) as p:
            return p.returncode == 0

    def run(self, code, env, extra_args=None, dependencies=None):
        if self.is_cross and self.exe_wrapper is None:
            raise CrossNoRunException('Can not run test applications in this cross environment.')
        with self._links_wrapper(code, env, extra_args, dependencies) as p:
            if p.returncode != 0:
                mlog.debug('Could not compile test file %s: %d\n' % (
                    p.input_name,
                    p.returncode))
                return RunResult(False)
            if self.is_cross:
                cmdlist = self.exe_wrapper + [p.output_name]
            else:
                cmdlist = p.output_name
            try:
                pe, so, se = Popen_safe(cmdlist)
            except Exception as e:
                mlog.debug('Could not run: %s (error: %s)\n' % (cmdlist, e))
                return RunResult(False)

        mlog.debug('Program stdout:\n')
        mlog.debug(so)
        mlog.debug('Program stderr:\n')
        mlog.debug(se)
        return RunResult(True, pe.returncode, so, se)

    def _compile_int(self, expression, prefix, env, extra_args, dependencies):
        fargs = {'prefix': prefix, 'expression': expression}
        t = '''#include <stdio.h>
        {prefix}
        int main() {{ static int a[1-2*!({expression})]; a[0]=0; return 0; }}'''
        return self.compiles(t.format(**fargs), env, extra_args, dependencies)

    def cross_compute_int(self, expression, low, high, guess, prefix, env, extra_args, dependencies):
        if isinstance(guess, int):
            if self._compile_int('%s == %d' % (expression, guess), prefix, env, extra_args, dependencies):
                return guess

        cur = low
        while low < high:
            cur = int((low + high) / 2)
            if cur == low:
                break

            if self._compile_int('%s >= %d' % (expression, cur), prefix, env, extra_args, dependencies):
                low = cur
            else:
                high = cur

        if self._compile_int('%s == %d' % (expression, cur), prefix, env, extra_args, dependencies):
            return cur
        raise EnvironmentException('Cross-compile check overflowed')

    def compute_int(self, expression, low, high, guess, prefix, env, extra_args=None, dependencies=None):
        if extra_args is None:
            extra_args = []
        if self.is_cross:
            return self.cross_compute_int(expression, low, high, guess, prefix, env, extra_args, dependencies)
        fargs = {'prefix': prefix, 'expression': expression}
        t = '''#include<stdio.h>
        {prefix}
        int main(int argc, char **argv) {{
            printf("%ld\\n", (long)({expression}));
            return 0;
        }};'''
        res = self.run(t.format(**fargs), env, extra_args, dependencies)
        if not res.compiled:
            return -1
        if res.returncode != 0:
            raise EnvironmentException('Could not run compute_int test binary.')
        return int(res.stdout)


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