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Driver: Better detection of mingw-gcc 

Stop blindly searching for "gcc.exe" on windows.
Stop assuming "/usr" on unix, fixes cross compiling.

Reviewers: mati865, yaron.keren

Subscribers: ismail, rnk

Differential revision: https://reviews.llvm.org/D15005

llvm-svn: 300555
This commit is contained in:
Martell Malone 2017-04-18 14:27:36 +00:00
parent 78d163c79e
commit f9799c70a3
2 changed files with 14 additions and 11 deletions
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24
clang/lib/Driver/ToolChains/MinGW.cpp
View File

@ -285,28 +285,30 @@ void toolchains::MinGW::findGccLibDir() {
}
}
llvm::ErrorOr<std::string> toolchains::MinGW::findGcc() {
llvm::SmallVector<llvm::SmallString<32>, 2> Gccs;
Gccs.emplace_back(getTriple().getArchName());
Gccs[0] += "-w64-mingw32-gcc";
Gccs.emplace_back("mingw32-gcc");
// Please do not add "gcc" here
for (StringRef CandidateGcc : Gccs)
if (llvm::ErrorOr<std::string> GPPName = llvm::sys::findProgramByName(CandidateGcc))
return GPPName;
return make_error_code(std::errc::no_such_file_or_directory);
}
toolchains::MinGW::MinGW(const Driver &D, const llvm::Triple &Triple,
const ArgList &Args)
: ToolChain(D, Triple, Args), CudaInstallation(D, Triple, Args) {
getProgramPaths().push_back(getDriver().getInstalledDir());
// In Windows there aren't any standard install locations, we search
// for gcc on the PATH. In Linux the base is always /usr.
#ifdef LLVM_ON_WIN32
if (getDriver().SysRoot.size())
Base = getDriver().SysRoot;
else if (llvm::ErrorOr<std::string> GPPName =
llvm::sys::findProgramByName("gcc"))
else if (llvm::ErrorOr<std::string> GPPName = findGcc())
Base = llvm::sys::path::parent_path(
llvm::sys::path::parent_path(GPPName.get()));
else
Base = llvm::sys::path::parent_path(getDriver().getInstalledDir());
#else
if (getDriver().SysRoot.size())
Base = getDriver().SysRoot;
else
Base = "/usr";
#endif
Base += llvm::sys::path::get_separator();
findGccLibDir();

1
clang/lib/Driver/ToolChains/MinGW.h
View File

@ -93,6 +93,7 @@ private:
mutable std::unique_ptr<tools::gcc::Preprocessor> Preprocessor;
mutable std::unique_ptr<tools::gcc::Compiler> Compiler;
void findGccLibDir();
llvm::ErrorOr<std::string> findGcc();
};
} // end namespace toolchains