mirror of
https://github.com/NixOS/nixpkgs.git
synced 2025-01-24 13:53:24 +00:00
49 lines
2.4 KiB
Diff
49 lines
2.4 KiB
Diff
This code injects an LLVM modulemap for glibc and libstdc++ by overriding
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specific VFS paths. In order to do that, it needs to know the actual locations
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of glibc and libstdc++, but it only searches `-sysroot` and fails. Here we
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patch it to also consider `-idirafter` and `-isystem` as added by cc-wrapper.
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--- a/lib/ClangImporter/ClangIncludePaths.cpp
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+++ b/lib/ClangImporter/ClangIncludePaths.cpp
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@@ -120,6 +120,7 @@ static clang::driver::Driver createClangDriver(const ASTContext &ctx) {
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/// \return a path without dots (`../`, './').
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static llvm::Optional<Path>
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findFirstIncludeDir(const llvm::opt::InputArgList &args,
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+ const llvm::opt::ArgList &DriverArgs,
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const ArrayRef<const char *> expectedFileNames) {
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// C++ stdlib paths are added as `-internal-isystem`.
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std::vector<std::string> includeDirs =
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@@ -128,6 +129,14 @@ findFirstIncludeDir(const llvm::opt::InputArgList &args,
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llvm::append_range(includeDirs,
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args.getAllArgValues(
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clang::driver::options::OPT_internal_externc_isystem));
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+ // Nix adds the C stdlib include path using `-idirafter`.
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+ llvm::append_range(includeDirs,
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+ DriverArgs.getAllArgValues(
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+ clang::driver::options::OPT_idirafter));
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+ // Nix adds the C++ stdlib include path using `-isystem`.
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+ llvm::append_range(includeDirs,
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+ DriverArgs.getAllArgValues(
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+ clang::driver::options::OPT_isystem));
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for (const auto &includeDir : includeDirs) {
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Path dir(includeDir);
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@@ -193,7 +202,7 @@ getGlibcFileMapping(ASTContext &ctx) {
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// Ideally we would check that all of the headers referenced from the
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// modulemap are present.
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Path glibcDir;
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- if (auto dir = findFirstIncludeDir(parsedIncludeArgs,
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+ if (auto dir = findFirstIncludeDir(parsedIncludeArgs, clangDriverArgs,
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{"inttypes.h", "unistd.h", "stdint.h"})) {
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glibcDir = dir.value();
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} else {
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@@ -251,7 +260,7 @@ getLibStdCxxFileMapping(ASTContext &ctx) {
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auto parsedStdlibArgs = parseClangDriverArgs(clangDriver, stdlibArgStrings);
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Path cxxStdlibDir;
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- if (auto dir = findFirstIncludeDir(parsedStdlibArgs,
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+ if (auto dir = findFirstIncludeDir(parsedStdlibArgs, clangDriverArgs,
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{"cstdlib", "string", "vector"})) {
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cxxStdlibDir = dir.value();
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} else {
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