Add macOS linker versioning information

This patch exploits the information residing in ltversion to set the
-compatibility_version and -current_version flags that are passed to the
linker on macOS.

mesonbuild/backend/ninjabackend.py

@@ -2392,7 +2392,7 @@ rule FORTRAN_DEP_HACK
             commands += linker.get_pic_args()
             # Add -Wl,-soname arguments on Linux, -install_name on OS X
             commands += linker.get_soname_args(target.prefix, target.name, target.suffix,
-                                               abspath, target.soversion,
+                                               abspath, target.soversion, target.ltversion,
                                                isinstance(target, build.SharedModule))
             # This is only visited when building for Windows using either GCC or Visual Studio
             if target.vs_module_defs and hasattr(linker, 'gen_vs_module_defs_args'):

mesonbuild/compilers/c.py

@@ -85,7 +85,7 @@ class CCompiler(Compiler):
         # Almost every compiler uses this for disabling warnings
         return ['-w']
 
-    def get_soname_args(self, prefix, shlib_name, suffix, path, soversion, is_shared_module):
+    def get_soname_args(self, prefix, shlib_name, suffix, path, soversion, version, is_shared_module):
         return []
 
     def split_shlib_to_parts(self, fname):

mesonbuild/compilers/compilers.py

@@ -939,7 +939,7 @@ ICC_WIN = 2
 GNU_LD_AS_NEEDED = '-Wl,--as-needed'
 APPLE_LD_AS_NEEDED = '-Wl,-dead_strip_dylibs'
 
-def get_gcc_soname_args(gcc_type, prefix, shlib_name, suffix, path, soversion, is_shared_module):
+def get_gcc_soname_args(gcc_type, prefix, shlib_name, suffix, path, soversion, version, is_shared_module):
     if soversion is None:
         sostr = ''
     else:
@@ -956,7 +956,15 @@ def get_gcc_soname_args(gcc_type, prefix, shlib_name, suffix, path, soversion, i
         if soversion is not None:
             install_name += '.' + soversion
         install_name += '.dylib'
-        return ['-install_name', os.path.join('@rpath', install_name)]
+        args = ['-install_name', os.path.join('@rpath', install_name)]
+        if version and len(version.split('.')) == 3:
+            splitted = version.split('.')
+            major = int(splitted[0])
+            minor = int(splitted[1])
+            revision = int(splitted[2])
+            args += ['-compatibility_version', '%d' % (major + minor + 1)]
+            args += ['-current_version', '%d.%d' % (major + minor + 1, revision)]
+        return args
     else:
         raise RuntimeError('Not implemented yet.')
 
@@ -1094,8 +1102,8 @@ class GnuCompiler:
     def split_shlib_to_parts(self, fname):
         return os.path.dirname(fname), fname
 
-    def get_soname_args(self, prefix, shlib_name, suffix, path, soversion, is_shared_module):
-        return get_gcc_soname_args(self.gcc_type, prefix, shlib_name, suffix, path, soversion, is_shared_module)
+    def get_soname_args(self, prefix, shlib_name, suffix, path, soversion, version, is_shared_module):
+        return get_gcc_soname_args(self.gcc_type, prefix, shlib_name, suffix, path, soversion, version, is_shared_module)
 
     def get_std_shared_lib_link_args(self):
         return ['-shared']
@@ -1193,7 +1201,7 @@ class ClangCompiler:
         # so it might change semantics at any time.
         return ['-include-pch', os.path.join(pch_dir, self.get_pch_name(header))]
 
-    def get_soname_args(self, prefix, shlib_name, suffix, path, soversion, is_shared_module):
+    def get_soname_args(self, prefix, shlib_name, suffix, path, soversion, version, is_shared_module):
         if self.clang_type == CLANG_STANDARD:
             gcc_type = GCC_STANDARD
         elif self.clang_type == CLANG_OSX:
@@ -1202,7 +1210,7 @@ class ClangCompiler:
             gcc_type = GCC_MINGW
         else:
             raise MesonException('Unreachable code when converting clang type to gcc type.')
-        return get_gcc_soname_args(gcc_type, prefix, shlib_name, suffix, path, soversion, is_shared_module)
+        return get_gcc_soname_args(gcc_type, prefix, shlib_name, suffix, path, soversion, version, is_shared_module)
 
     def has_multi_arguments(self, args, env):
         myargs = ['-Werror=unknown-warning-option', '-Werror=unused-command-line-argument']
@@ -1276,7 +1284,7 @@ class IntelCompiler:
     def split_shlib_to_parts(self, fname):
         return os.path.dirname(fname), fname
 
-    def get_soname_args(self, prefix, shlib_name, suffix, path, soversion, is_shared_module):
+    def get_soname_args(self, prefix, shlib_name, suffix, path, soversion, version, is_shared_module):
         if self.icc_type == ICC_STANDARD:
             gcc_type = GCC_STANDARD
         elif self.icc_type == ICC_OSX:
@@ -1285,7 +1293,7 @@ class IntelCompiler:
             gcc_type = GCC_MINGW
         else:
             raise MesonException('Unreachable code when converting icc type to gcc type.')
-        return get_gcc_soname_args(gcc_type, prefix, shlib_name, suffix, path, soversion, is_shared_module)
+        return get_gcc_soname_args(gcc_type, prefix, shlib_name, suffix, path, soversion, version, is_shared_module)
 
     # TODO: centralise this policy more globally, instead
     # of fragmenting it into GnuCompiler and ClangCompiler

mesonbuild/compilers/cs.py

@@ -41,7 +41,7 @@ class CsCompiler(Compiler):
     def get_link_args(self, fname):
         return ['-r:' + fname]
 
-    def get_soname_args(self, prefix, shlib_name, suffix, path, soversion, is_shared_module):
+    def get_soname_args(self, prefix, shlib_name, suffix, path, soversion, version, is_shared_module):
         return []
 
     def get_werror_args(self):

mesonbuild/compilers/d.py

@@ -89,9 +89,9 @@ class DCompiler(Compiler):
     def get_std_shared_lib_link_args(self):
         return ['-shared']
 
-    def get_soname_args(self, prefix, shlib_name, suffix, path, soversion, is_shared_module):
+    def get_soname_args(self, prefix, shlib_name, suffix, path, soversion, version, is_shared_module):
         # FIXME: Make this work for Windows, MacOS and cross-compiling
-        return get_gcc_soname_args(GCC_STANDARD, prefix, shlib_name, suffix, path, soversion, is_shared_module)
+        return get_gcc_soname_args(GCC_STANDARD, prefix, shlib_name, suffix, path, soversion, version, is_shared_module)
 
     def get_feature_args(self, kwargs, build_to_src):
         res = []

mesonbuild/compilers/fortran.py

@@ -94,8 +94,8 @@ end program prog
     def split_shlib_to_parts(self, fname):
         return os.path.dirname(fname), fname
 
-    def get_soname_args(self, prefix, shlib_name, suffix, path, soversion, is_shared_module):
-        return get_gcc_soname_args(self.gcc_type, prefix, shlib_name, suffix, path, soversion, is_shared_module)
+    def get_soname_args(self, prefix, shlib_name, suffix, path, soversion, version, is_shared_module):
+        return get_gcc_soname_args(self.gcc_type, prefix, shlib_name, suffix, path, soversion, version, is_shared_module)
 
     def get_dependency_gen_args(self, outtarget, outfile):
         # Disabled until this is fixed:

mesonbuild/compilers/java.py

@@ -25,7 +25,7 @@ class JavaCompiler(Compiler):
         self.id = 'unknown'
         self.javarunner = 'java'
 
-    def get_soname_args(self, prefix, shlib_name, suffix, path, soversion, is_shared_module):
+    def get_soname_args(self, prefix, shlib_name, suffix, path, soversion, version, is_shared_module):
         return []
 
     def get_werror_args(self):