Factor out code for windows abi tags.

mesonbuild/dependencies/misc.py

@@ -18,7 +18,6 @@
 import os
 import re
 import shlex
-import shutil
 import sysconfig
 
 from pathlib import Path
@@ -44,6 +43,10 @@
 #   - $BOOST_ROOT/boost/*.hpp
 #   - $BOOST_ROOT/lib<arch>-<compiler>/*.lib where arch=32/64 and compiler=msvc-14.1
 #
+# Note that we should also try to support:
+# mingw-w64 / Windows : libboost_<module>-mt.a            (location = <prefix>/mingw64/lib/)
+#                       libboost_<module>-mt.dll.a
+#
 # Library names supported:
 #   - libboost_<module>-<compiler>-mt-gd-x_x.lib (static)
 #   - boost_<module>-<compiler>-mt-gd-x_x.lib|.dll (shared)
@@ -97,18 +100,13 @@
 #   2.2. Find boost libraries with unknown suffixes using file-name globbing.
 
 # TODO: Unix: Don't assume we know where the boost dir is, rely on -Idir and -Ldir being set.
-# TODO: Determine a suffix (e.g. "-mt" or "") and use it.
-# TODO: Get_win_link_args( ) and get_link_args( )
-# TODO: Genericize: 'args += ['-L' + dir] => args += self.compiler.get_linker_search_args(dir)
 # TODO: Allow user to specify suffix in BOOST_SUFFIX, or add specific options like BOOST_DEBUG for 'd' for debug.
-# TODO: fix cross:
-#          is_windows() -> for_windows(self.want_cross, self.env)
-#          is_osx() and self.want_cross -> for_darwin(self.want_cross, self.env)
 
 class BoostDependency(ExternalDependency):
     def __init__(self, environment, kwargs):
         super().__init__('boost', environment, 'cpp', kwargs)
         self.need_static_link = ['boost_exception', 'boost_test_exec_monitor']
+        # FIXME: is this the right way to find the build type?
         self.is_debug = environment.cmd_line_options.buildtype.startswith('debug')
         threading = kwargs.get("threading", "multi")
         self.is_multithreading = threading == "multi"
@@ -131,42 +129,34 @@ def __init__(self, environment, kwargs):
             self.libdir = os.environ['BOOST_LIBRARYDIR']
 
         if self.boost_root is None:
-            if mesonlib.is_windows():
+            if mesonlib.for_windows(self.want_cross, self.env):
                 self.boost_roots = self.detect_win_roots()
             else:
                 self.boost_roots = self.detect_nix_roots()
 
-        if self.boost_root is None and not self.boost_roots:
-            self.log_fail()
-            return
-
         if self.incdir is None:
-            if mesonlib.is_windows():
+            if mesonlib.for_windows(self.want_cross, self.env):
                 self.incdir = self.detect_win_incdir()
             else:
                 self.incdir = self.detect_nix_incdir()
 
-        if self.incdir is None and mesonlib.is_windows():
-            self.log_fail()
-            return
-
         if self.check_invalid_modules():
+            self.log_fail()
             return
 
         mlog.debug('Boost library root dir is', mlog.bold(self.boost_root))
         mlog.debug('Boost include directory is', mlog.bold(self.incdir))
 
-        self.lib_modules = {}
-        self.detect_version()
+        # 1. check if we can find BOOST headers.
+        self.detect_headers_and_version()
+
+        # 2. check if we can find BOOST libraries.
         if self.is_found:
             self.detect_lib_modules()
             mlog.debug('Boost library directory is', mlog.bold(self.libdir))
-            for m in self.requested_modules:
-                if 'boost_' + m not in self.lib_modules:
-                    mlog.debug('Requested Boost library {!r} not found'.format(m))
-                    self.log_fail()
-                    self.is_found = False
-                    return
+
+        # 3. Report success or failure
+        if self.is_found:
             self.log_success()
         else:
             self.log_fail()
@@ -187,7 +177,6 @@ def check_invalid_modules(self):
 
         if invalid_modules:
             mlog.log(mlog.red('ERROR:'), 'Invalid Boost modules: ' + ', '.join(invalid_modules))
-            self.log_fail()
             return True
         else:
             return False
@@ -275,7 +264,7 @@ def get_requested(self, kwargs):
                 raise DependencyException('Boost module argument is not a string.')
         return candidates
 
-    def detect_version(self):
+    def detect_headers_and_version(self):
         try:
             version = self.compiler.get_define('BOOST_LIB_VERSION', '#include <boost/version.hpp>', self.env, self.get_compile_args(), [])
         except mesonlib.EnvironmentException:
@@ -289,9 +278,23 @@ def detect_version(self):
         self.is_found = True
 
     def detect_lib_modules(self):
-        if mesonlib.is_windows():
-            return self.detect_lib_modules_win()
-        return self.detect_lib_modules_nix()
+        self.lib_modules = {}
+
+        # 1. Try to find modules using compiler.find_library( )
+        if self.find_libraries_with_abi_tags(self.abi_tags()):
+            pass
+        # 2. Fall back to the old method
+        else:
+            if mesonlib.for_windows(self.want_cross, self.env):
+                self.detect_lib_modules_win()
+            else:
+                self.detect_lib_modules_nix()
+
+        # 3. Check if we can find the modules
+        for m in self.requested_modules:
+            if 'boost_' + m not in self.lib_modules:
+                mlog.debug('Requested Boost library {!r} not found'.format(m))
+                self.is_found = False
 
     def modname_from_filename(self, filename):
         modname = os.path.basename(filename)
@@ -301,20 +304,94 @@ def modname_from_filename(self, filename):
             modname = modname[3:]
         return modname
 
-    def detect_lib_modules_win(self):
-        arch = detect_cpu_family(self.env.coredata.compilers)
+    def compiler_tag(self):
+        tag = None
+        compiler = self.env.detect_cpp_compiler(self.want_cross)
+        if mesonlib.for_windows(self.want_cross, self.env):
+            if compiler.get_id() == 'msvc':
+                comp_ts_version = compiler.get_toolset_version()
+                compiler_ts = comp_ts_version.split('.')
+                # FIXME - what about other compilers?
+                tag = '-vc{}{}'.format(compiler_ts[0], compiler_ts[1])
+            else:
+                tag = ''
+        return tag
+
+    def threading_tag(self):
+        if not self.is_multithreading:
+            return ''
+
+        if mesonlib.for_darwin(self.want_cross, self.env):
+            # - Mac:      requires -mt for multithreading, so should not fall back to non-mt libraries.
+            return '-mt'
+        elif mesonlib.for_windows(self.want_cross, self.env):
+            # - Windows:  requires -mt for multithreading, so should not fall back to non-mt libraries.
+            return '-mt'
+        else:
+            # - Linux:    leaves off -mt but libraries are multithreading-aware.
+            # - Cygwin:   leaves off -mt but libraries are multithreading-aware.
+            return ''
+
+    def version_tag(self):
+        return '-' + self.version.replace('.', '_')
+
+    def debug_tag(self):
+        return '-gd' if self.is_debug else ''
+
+    def versioned_abi_tag(self):
+        return self.compiler_tag() + self.threading_tag() + self.debug_tag() + self.version_tag()
+
+    # FIXME - how to handle different distributions, e.g. for Mac? Currently we handle homebrew and macports, but not fink.
+    def abi_tags(self):
+        if mesonlib.for_windows(self.want_cross, self.env):
+            return [self.versioned_abi_tag(), self.threading_tag()]
+        else:
+            return [self.threading_tag()]
+
+    def sourceforge_dir(self):
+        if self.env.detect_cpp_compiler(self.want_cross).get_id() != 'msvc':
+            return None
         comp_ts_version = self.env.detect_cpp_compiler(self.want_cross).get_toolset_version()
-        compiler_ts = comp_ts_version.split('.')
-        compiler = 'vc{}{}'.format(compiler_ts[0], compiler_ts[1])
+        arch = detect_cpu_family(self.env.coredata.compilers)
+        if arch == 'x86':
+            return 'lib32-msvc-{}'.format(comp_ts_version)
+        elif arch == 'x86_64':
+            return 'lib64-msvc-{}'.format(comp_ts_version)
+        else:
+            # Does anyone do Boost cross-compiling to other archs on Windows?
+            return None
+
+    def find_libraries_with_abi_tag(self, tag):
+
+        # All modules should have the same tag
+        self.lib_modules = {}
+
+        all_found = True
+
+        for module in self.requested_modules:
+            libname = 'boost_' + module + tag
+
+            args = self.compiler.find_library(libname, self.env, self.extra_lib_dirs())
+            if args is None:
+                mlog.debug("Couldn\'t find library '{}' for boost module '{}'  (ABI tag = '{}')".format(libname, module, tag))
+                all_found = False
+            else:
+                mlog.debug('Link args for boost module "{}" are {}'.format(module, args))
+                self.lib_modules['boost_' + module] = args
+
+        return all_found
+
+    def find_libraries_with_abi_tags(self, tags):
+        for tag in tags:
+            if self.find_libraries_with_abi_tag(tag):
+                return True
+        return False
+
+    def detect_lib_modules_win(self):
         if not self.libdir:
             # The libdirs in the distributed binaries (from sf)
-            if arch == 'x86':
-                lib_sf = 'lib32-msvc-{}'.format(comp_ts_version)
-            elif arch == 'x86_64':
-                lib_sf = 'lib64-msvc-{}'.format(comp_ts_version)
-            else:
-                # Does anyone do Boost cross-compiling to other archs on Windows?
-                lib_sf = None
+            lib_sf = self.sourceforge_dir()
+
             if self.boost_root:
                 roots = [self.boost_root]
             else:
@@ -335,12 +412,8 @@ def detect_lib_modules_win(self):
             return
 
         for name in self.need_static_link:
-            libname = "lib{}".format(name) + '-' + compiler
-            if self.is_multithreading:
-                libname = libname + '-mt'
-            if self.is_debug:
-                libname = libname + '-gd'
-            libname = libname + "-{}.lib".format(self.version.replace('.', '_'))
+            # FIXME - why are we only looking for *.lib? Mingw provides *.dll.a and *.a
+            libname = 'lib' + name + self.versioned_abi_tag() + '.lib'
             if os.path.isfile(os.path.join(self.libdir, libname)):
                 self.lib_modules[self.modname_from_filename(libname)] = [libname]
             else:
@@ -351,52 +424,23 @@ def detect_lib_modules_win(self):
         # globber1 applies to a layout=system installation
         # globber2 applies to a layout=versioned installation
         globber1 = 'libboost_*' if self.static else 'boost_*'
-        globber2 = globber1 + '-' + compiler
-        if self.is_multithreading:
-            globber2 = globber2 + '-mt'
-        if self.is_debug:
-            globber2 = globber2 + '-gd'
-        globber2 = globber2 + '-{}'.format(self.version.replace('.', '_'))
+        globber2 = globber1 + self.versioned_abi_tag()
+        # FIXME - why are we only looking for *.lib? Mingw provides *.dll.a and *.a
         globber2_matches = glob.glob(os.path.join(self.libdir, globber2 + '.lib'))
         for entry in globber2_matches:
             fname = os.path.basename(entry)
             self.lib_modules[self.modname_from_filename(fname)] = [fname]
         if len(globber2_matches) == 0:
+            # FIXME - why are we only looking for *.lib? Mingw provides *.dll.a and *.a
             for entry in glob.glob(os.path.join(self.libdir, globber1 + '.lib')):
                 if self.static:
                     fname = os.path.basename(entry)
                     self.lib_modules[self.modname_from_filename(fname)] = [fname]
 
-    # - Linux  leaves off -mt but libraries are multithreading-aware.
-    # - Cygwin leaves off -mt but libraries are multithreading-aware.
-    # - Mac requires -mt for multithreading, so should not fall back
-    #   to non-mt libraries.
-    def abi_tag(self):
-        if mesonlib.for_windows(self.want_cross, self.env):
-            return None
-        if self.is_multithreading and mesonlib.for_darwin(self.want_cross, self.env):
-            return '-mt'
-        else:
-            return ''
-
     def detect_lib_modules_nix(self):
-        all_found = True
-        for module in self.requested_modules:
-            libname = 'boost_' + module + self.abi_tag()
-
-            args = self.compiler.find_library(libname, self.env, self.extra_lib_dirs())
-            if args is None:
-                mlog.debug('Couldn\'t find library "{}" for boost module "{}"'.format(module, libname))
-                all_found = False
-            else:
-                mlog.debug('Link args for boost module "{}" are {}'.format(module, args))
-                self.lib_modules['boost_' + module] = args
-        if all_found:
-            return
-
         if self.static:
             libsuffix = 'a'
-        elif mesonlib.is_osx() and not self.want_cross:
+        elif mesonlib.for_darwin(self.want_cross, self.env):
             libsuffix = 'dylib'
         else:
             libsuffix = 'so'
@@ -442,7 +486,7 @@ def extra_lib_dirs(self):
     def get_link_args(self):
         args = []
         for dir in self.extra_lib_dirs():
-            args += self.compiler.get_linker_search_args(self.libdir)
+            args += self.compiler.get_linker_search_args(dir)
         for lib in self.requested_modules:
             args += self.lib_modules['boost_' + lib]
         return args