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ENH: Re-enable system include dir suppression

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This creates variable CMAKE_<LANG>_IMPLICIT_INCLUDE_DIRECTORIES to
specify implicit include directories on a per-language basis.  This
replaces the previous platform-wide variable.  It is necessary to
avoid explicit specification of -I/usr/include on some compilers
(such as HP aCC) because:

  1.) It may break ordering among system include directories defined
      internally by the compiler, thus getting wrong system headers.
  2.) It tells the compiler to treat the system include directory
      as a user include directory, enabling warnings in the headers.

See issue #8598.
This commit is contained in:
Brad King 2009-02-25 11:44:46 -05:00
parent 261600bd09
commit cb788e8f6d
3 changed files with 38 additions and 0 deletions
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7
Modules/Platform/UnixPaths.cmake
View File

@ -53,5 +53,12 @@ LIST(APPEND CMAKE_PLATFORM_IMPLICIT_LINK_DIRECTORIES
/lib /usr/lib /usr/lib32 /usr/lib64
)
LIST(APPEND CMAKE_C_IMPLICIT_INCLUDE_DIRECTORIES
/usr/include
)
LIST(APPEND CMAKE_CXX_IMPLICIT_INCLUDE_DIRECTORIES
/usr/include
)
# Enable use of lib64 search path variants by default.
SET_PROPERTY(GLOBAL PROPERTY FIND_LIBRARY_USE_LIB64_PATHS TRUE)

9
Source/cmDocumentVariables.cxx
View File

@ -1097,6 +1097,15 @@ void cmDocumentVariables::DefineVariables(cmake* cm)
"This is a list of file extensions that may be "
"part of a project for a given language but are not compiled. ",false,
"Variables for Languages");
cm->DefineProperty
("CMAKE_<LANG>_IMPLICIT_INCLUDE_DIRECTORIES", cmProperty::VARIABLE,
"Directories implicitly searched by the compiler for header files.",
"CMake does not explicitly specify these directories on compiler "
"command lines for language <LANG>. "
"This prevents system include directories from being treated as user "
"include directories on some compilers.", false,
"Variables for Languages");
cm->DefineProperty
("CMAKE_<LANG>_LINKER_PREFERENCE", cmProperty::VARIABLE,

22
Source/cmLocalGenerator.cxx
View File

@ -1186,6 +1186,23 @@ const char* cmLocalGenerator::GetIncludeFlags(const char* lang)
{
return this->LanguageToIncludeFlags[lang].c_str();
}
// Load implicit include directories for this language.
std::set<cmStdString> impDirs;
std::string impDirVar = "CMAKE_";
impDirVar += lang;
impDirVar += "_IMPLICIT_INCLUDE_DIRECTORIES";
if(const char* value = this->Makefile->GetDefinition(impDirVar.c_str()))
{
std::vector<std::string> impDirVec;
cmSystemTools::ExpandListArgument(value, impDirVec);
for(std::vector<std::string>::const_iterator i = impDirVec.begin();
i != impDirVec.end(); ++i)
{
impDirs.insert(*i);
}
}
cmOStringStream includeFlags;
std::vector<std::string> includes;
this->GetIncludeDirectories(includes);
@ -1233,6 +1250,11 @@ const char* cmLocalGenerator::GetIncludeFlags(const char* lang)
#endif
for(i = includes.begin(); i != includes.end(); ++i)
{
// Skip implicit include directories.
if(impDirs.find(*i) != impDirs.end())
{
continue;
}
#ifdef __APPLE__
if(cmSystemTools::IsPathToFramework(i->c_str()))
{