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Refactor exclusion of -I/usr/include to avoid per-language values

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Add a `CMAKE_PLATFORM_IMPLICIT_INCLUDE_DIRECTORIES` to contain the
hard-coded list of paths to be excluded from `-I` arguments so that the
values remain excluded even if the per-language
`CMAKE_<LANG>_IMPLICIT_INCLUDE_DIRECTORIES` variants change.

This is needed to preserve our historical exclusion of `-I/usr/include`
even when it is not a real implicit include directory.  A policy may be
needed to remove it later.
This commit is contained in:
Brad King 2019-01-21 11:09:32 -05:00
parent a61c061b61
commit 15ad830062
2 changed files with 23 additions and 8 deletions
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7
Modules/Platform/UnixPaths.cmake
View File

@ -63,6 +63,13 @@ list(APPEND CMAKE_PLATFORM_IMPLICIT_LINK_DIRECTORIES
/lib /lib32 /lib64 /usr/lib /usr/lib32 /usr/lib64
)
# Platform-wide directories to avoid adding via -I<dir>.
list(APPEND CMAKE_PLATFORM_IMPLICIT_INCLUDE_DIRECTORIES
/usr/include
)
# Default per-language values. These may be later replaced after
# parsing the implicit link directories from compiler output.
list(APPEND CMAKE_C_IMPLICIT_INCLUDE_DIRECTORIES
/usr/include
)

24
Source/cmLocalGenerator.cxx
View File

@ -947,21 +947,29 @@ std::vector<BT<std::string>> cmLocalGenerator::GetIncludeDirectories(
rootPath = this->Makefile->GetSafeDefinition("CMAKE_SYSROOT");
}
std::vector<std::string> impDirVec;
// Get platform-wide implicit directories.
if (const char* implicitIncludes = (this->Makefile->GetDefinition(
"CMAKE_PLATFORM_IMPLICIT_INCLUDE_DIRECTORIES"))) {
cmSystemTools::ExpandListArgument(implicitIncludes, impDirVec);
}
// Load implicit include directories for this language.
std::string key = "CMAKE_";
key += lang;
key += "_IMPLICIT_INCLUDE_DIRECTORIES";
if (const char* value = this->Makefile->GetDefinition(key)) {
std::vector<std::string> impDirVec;
cmSystemTools::ExpandListArgument(value, impDirVec);
for (std::string const& i : impDirVec) {
{
std::string d = rootPath + i;
cmSystemTools::ConvertToUnixSlashes(d);
emitted.insert(std::move(d));
}
implicitDirs.push_back(i);
}
for (std::string const& i : impDirVec) {
{
std::string d = rootPath + i;
cmSystemTools::ConvertToUnixSlashes(d);
emitted.insert(std::move(d));
}
implicitDirs.push_back(i);
}
}