ENH: add support for language flags at rule expansion time

Modules/CMakeCInformation.cmake

@@ -86,7 +86,7 @@ INCLUDE(CMakeCommonLanguageInclude)
 # create a C shared library
 IF(NOT CMAKE_C_CREATE_SHARED_LIBRARY)
   SET(CMAKE_C_CREATE_SHARED_LIBRARY
-      "<CMAKE_C_COMPILER> <CMAKE_SHARED_LIBRARY_C_FLAGS> <LINK_FLAGS> <CMAKE_SHARED_LIBRARY_CREATE_C_FLAGS> <CMAKE_SHARED_LIBRARY_SONAME_C_FLAG><TARGET_SONAME> -o <TARGET> <OBJECTS> <LINK_LIBRARIES>")
+      "<CMAKE_C_COMPILER> <CMAKE_SHARED_LIBRARY_C_FLAGS> <LANGUAGE_COMPILE_FLAGS> <LINK_FLAGS> <CMAKE_SHARED_LIBRARY_CREATE_C_FLAGS> <CMAKE_SHARED_LIBRARY_SONAME_C_FLAG><TARGET_SONAME> -o <TARGET> <OBJECTS> <LINK_LIBRARIES>")
 ENDIF(NOT CMAKE_C_CREATE_SHARED_LIBRARY)
 
 # create a C shared module just copy the shared library rule

Modules/CMakeCXXInformation.cmake

@@ -137,7 +137,7 @@ INCLUDE(CMakeCommonLanguageInclude)
 # create a shared C++ library
 IF(NOT CMAKE_CXX_CREATE_SHARED_LIBRARY)
   SET(CMAKE_CXX_CREATE_SHARED_LIBRARY
-      "<CMAKE_CXX_COMPILER> <CMAKE_SHARED_LIBRARY_CXX_FLAGS> <LINK_FLAGS> <CMAKE_SHARED_LIBRARY_CREATE_CXX_FLAGS> <CMAKE_SHARED_LIBRARY_SONAME_CXX_FLAG><TARGET_SONAME> -o <TARGET> <OBJECTS> <LINK_LIBRARIES>")
+      "<CMAKE_CXX_COMPILER> <CMAKE_SHARED_LIBRARY_CXX_FLAGS> <LANGUAGE_COMPILE_FLAGS> <LINK_FLAGS> <CMAKE_SHARED_LIBRARY_CREATE_CXX_FLAGS> <CMAKE_SHARED_LIBRARY_SONAME_CXX_FLAG><TARGET_SONAME> -o <TARGET> <OBJECTS> <LINK_LIBRARIES>")
 ENDIF(NOT CMAKE_CXX_CREATE_SHARED_LIBRARY)
 
 # create a c++ shared module copy the shared library rule by default

Modules/CMakeFortranInformation.cmake

@@ -102,7 +102,7 @@ INCLUDE(CMakeCommonLanguageInclude)
 # create a Fortran shared library
 IF(NOT CMAKE_Fortran_CREATE_SHARED_LIBRARY)
   SET(CMAKE_Fortran_CREATE_SHARED_LIBRARY
-      "<CMAKE_Fortran_COMPILER> <CMAKE_SHARED_LIBRARY_Fortran_FLAGS> <LINK_FLAGS> <CMAKE_SHARED_LIBRARY_CREATE_Fortran_FLAGS> <CMAKE_SHARED_LIBRARY_SONAME_Fortran_FLAG><TARGET_SONAME> -o <TARGET> <OBJECTS> <LINK_LIBRARIES>")
+      "<CMAKE_Fortran_COMPILER> <CMAKE_SHARED_LIBRARY_Fortran_FLAGS> <LANGUAGE_COMPILE_FLAGS> <LINK_FLAGS> <CMAKE_SHARED_LIBRARY_CREATE_Fortran_FLAGS> <CMAKE_SHARED_LIBRARY_SONAME_Fortran_FLAG><TARGET_SONAME> -o <TARGET> <OBJECTS> <LINK_LIBRARIES>")
 ENDIF(NOT CMAKE_Fortran_CREATE_SHARED_LIBRARY)
 
 # create a Fortran shared module just copy the shared library rule

Modules/Platform/CYGWIN.cmake

@@ -19,12 +19,12 @@ SET(CMAKE_FIND_LIBRARY_PREFIXES "cyg" "lib")
 SET(CMAKE_FIND_LIBRARY_SUFFIXES ".dll" ".dll.a" ".a")
 
 SET(CMAKE_C_CREATE_SHARED_MODULE
-  "<CMAKE_C_COMPILER> <CMAKE_SHARED_MODULE_C_FLAGS> <LINK_FLAGS> <CMAKE_SHARED_MODULE_CREATE_C_FLAGS> -o <TARGET> <OBJECTS> <LINK_LIBRARIES>")
+  "<CMAKE_C_COMPILER> <LANGUAGE_COMPILE_FLAGS> <CMAKE_SHARED_MODULE_C_FLAGS> <LINK_FLAGS> <CMAKE_SHARED_MODULE_CREATE_C_FLAGS> -o <TARGET> <OBJECTS> <LINK_LIBRARIES>")
 SET(CMAKE_CXX_CREATE_SHARED_MODULE
-  "<CMAKE_CXX_COMPILER> <CMAKE_SHARED_MODULE_CXX_FLAGS> <LINK_FLAGS> <CMAKE_SHARED_MODULE_CREATE_CXX_FLAGS> -o <TARGET> <OBJECTS> <LINK_LIBRARIES>")
+  "<CMAKE_CXX_COMPILER> <LANGUAGE_COMPILE_FLAGS> <CMAKE_SHARED_MODULE_CXX_FLAGS> <LINK_FLAGS> <CMAKE_SHARED_MODULE_CREATE_CXX_FLAGS> -o <TARGET> <OBJECTS> <LINK_LIBRARIES>")
 
 SET(CMAKE_C_CREATE_SHARED_LIBRARY
-  "<CMAKE_C_COMPILER> <CMAKE_SHARED_LIBRARY_C_FLAGS> <LINK_FLAGS> <CMAKE_SHARED_LIBRARY_CREATE_C_FLAGS> -o <TARGET> -Wl,--out-implib,<TARGET_IMPLIB> <OBJECTS> <LINK_LIBRARIES>")
+  "<CMAKE_C_COMPILER> <LANGUAGE_COMPILE_FLAGS> <CMAKE_SHARED_LIBRARY_C_FLAGS> <LINK_FLAGS> <CMAKE_SHARED_LIBRARY_CREATE_C_FLAGS> -o <TARGET> -Wl,--out-implib,<TARGET_IMPLIB> <OBJECTS> <LINK_LIBRARIES>")
 SET(CMAKE_CXX_CREATE_SHARED_LIBRARY
-  "<CMAKE_CXX_COMPILER> <CMAKE_SHARED_LIBRARY_CXX_FLAGS> <LINK_FLAGS> <CMAKE_SHARED_LIBRARY_CREATE_CXX_FLAGS> -o <TARGET> -Wl,--out-implib,<TARGET_IMPLIB> <OBJECTS> <LINK_LIBRARIES>")
+  "<CMAKE_CXX_COMPILER> <LANGUAGE_COMPILE_FLAGS> <CMAKE_SHARED_LIBRARY_CXX_FLAGS> <LINK_FLAGS> <CMAKE_SHARED_LIBRARY_CREATE_CXX_FLAGS> -o <TARGET> -Wl,--out-implib,<TARGET_IMPLIB> <OBJECTS> <LINK_LIBRARIES>")
 INCLUDE(Platform/UnixPaths)

Source/cmLocalGenerator.cxx

@@ -604,6 +604,10 @@ cmLocalGenerator::ExpandRuleVariable(std::string const& variable,
         return targetQuoted;
         }
       }
+    if(variable == "LANGUAGE_COMPILE_FLAGS")
+      {
+      return replaceValues.LanguageCompileFlags;
+      }
     if(variable == "TARGET")
       {
       return replaceValues.Target;

Source/cmLocalGenerator.h

@@ -196,6 +196,7 @@ public:
     const char* TargetSOName;
     const char* TargetInstallNameDir;
     const char* LinkFlags;
+    const char* LanguageCompileFlags;
   };
 
 protected:

Source/cmMakefileLibraryTargetGenerator.cxx

@@ -431,7 +431,11 @@ void cmMakefileLibraryTargetGenerator::WriteLibraryRules
       vars.TargetInstallNameDir = install_name_dir.c_str();
       }
     }
-
+  std::string langFlags;
+  this->LocalGenerator
+    ->AddLanguageFlags(langFlags, linkLanguage,
+                       this->LocalGenerator->m_ConfigurationName.c_str());
+  vars.LanguageCompileFlags = langFlags.c_str();
   // Expand placeholders in the commands.
   this->LocalGenerator->m_TargetImplib = targetOutPathImport;
   for(std::vector<std::string>::iterator i = commands.begin();