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-rw-r--r--gnu/packages/patches/clang-7.0-libc-search-path.patch82
1 files changed, 47 insertions, 35 deletions
diff --git a/gnu/packages/patches/clang-7.0-libc-search-path.patch b/gnu/packages/patches/clang-7.0-libc-search-path.patch
index 07ff8c90bd..cb7088eda4 100644
--- a/gnu/packages/patches/clang-7.0-libc-search-path.patch
+++ b/gnu/packages/patches/clang-7.0-libc-search-path.patch
@@ -4,8 +4,39 @@ but unfortunately, that doesn't work for us.
This patch makes it easy to insert libc's $libdir so that Clang passes the
correct absolute file name of crt1.o etc. to 'ld'. It also disables all
the distro-specific stuff and removes the hard-coded FHS directory names
-to make sure Clang also works on non-GuixSD systems.
+to make sure Clang also works on foreign distros.
+diff --git a/lib/Driver/Distro.cpp b/lib/Driver/Distro.cpp
+index 2c4d44f..0493b0a 100644
+--- a/lib/Driver/Distro.cpp
++++ b/lib/Driver/Distro.cpp
+@@ -18,6 +18,10 @@ using namespace clang::driver;
+ using namespace clang;
+
+ static Distro::DistroType DetectDistro(vfs::FileSystem &VFS) {
++ // The compiler should always behave the same, even when used via Guix on a
++ // foreign distro.
++ return Distro::UnknownDistro;
++
+ llvm::ErrorOr<std::unique_ptr<llvm::MemoryBuffer>> File =
+ VFS.getBufferForFile("/etc/lsb-release");
+ if (File) {
+diff --git a/lib/Driver/ToolChains/Cuda.cpp b/lib/Driver/ToolChains/Cuda.cpp
+index 7fb4ae4..cb21344 100644
+--- a/lib/Driver/ToolChains/Cuda.cpp
++++ b/lib/Driver/ToolChains/Cuda.cpp
+@@ -66,6 +66,9 @@ CudaInstallationDetector::CudaInstallationDetector(
+ const Driver &D, const llvm::Triple &HostTriple,
+ const llvm::opt::ArgList &Args)
+ : D(D) {
++ // Don't look for CUDA in /usr.
++ return;
++
+ struct Candidate {
+ std::string Path;
+ bool StrictChecking;
+diff --git a/lib/Driver/ToolChains/Linux.cpp b/lib/Driver/ToolChains/Linux.cpp
+index f8f3623..36dc722 100644
--- a/lib/Driver/ToolChains/Linux.cpp
+++ b/lib/Driver/ToolChains/Linux.cpp
@@ -225,7 +225,9 @@ Linux::Linux(const Driver &D, const llvm::Triple &Triple, const ArgList &Args)
@@ -27,56 +58,37 @@ to make sure Clang also works on non-GuixSD systems.
// The selection of paths to try here is designed to match the patterns which
// the GCC driver itself uses, as this is part of the GCC-compatible driver.
-@@ -342,7 +345,7 @@ Linux::Linux(const Driver &D, const llvm::Triple &Triple, const ArgList &Args)
- // the cross. Note that GCC does include some of these directories in some
- // configurations but this seems somewhere between questionable and simply
- // a bug.
-- if (StringRef(LibPath).startswith(SysRoot)) {
-+ if (0) {
- addPathIfExists(D, LibPath + "/" + MultiarchTriple, Paths);
- addPathIfExists(D, LibPath + "/../" + OSLibDir, Paths);
+@@ -348,6 +351,7 @@ Linux::Linux(const Driver &D, const llvm::Triple &Triple, const ArgList &Args)
}
-@@ -361,6 +364,8 @@ Linux::Linux(const Driver &D, const llvm::Triple &Triple, const ArgList &Args)
- addPathIfExists(D, SysRoot + "/lib/" + MultiarchTriple, Paths);
- addPathIfExists(D, SysRoot + "/lib/../" + OSLibDir, Paths);
-
-+ // This requires the commented distro tweaks above.
-+#if 0
- if (IsAndroid) {
- // Android sysroots contain a library directory for each supported OS
- // version as well as some unversioned libraries in the usual multiarch
-@@ -389,10 +394,14 @@ Linux::Linux(const Driver &D, const llvm::Triple &Triple, const ArgList &Args)
- addPathIfExists(D, SysRoot + "/" + OSLibDir + "/" + ABIName, Paths);
- addPathIfExists(D, SysRoot + "/usr/" + OSLibDir + "/" + ABIName, Paths);
}
-+#endif
++#if 0
+ // Similar to the logic for GCC above, if we currently running Clang inside
+ // of the requested system root, add its parent library paths to
+ // those searched.
+@@ -393,6 +397,8 @@ Linux::Linux(const Driver &D, const llvm::Triple &Triple, const ArgList &Args)
// Try walking via the GCC triple path in case of biarch or multiarch GCC
// installations with strange symlinks.
if (GCCInstallation.isValid()) {
+ // The following code would end up adding things like
+ // "/usr/lib/x86_64-unknown-linux-gnu/../../lib64" to the search path.
-+#if 0
addPathIfExists(D,
SysRoot + "/usr/lib/" + GCCInstallation.getTriple().str() +
"/../../" + OSLibDir,
-@@ -405,6 +414,7 @@ Linux::Linux(const Driver &D, const llvm::Triple &Triple, const ArgList &Args)
- BiarchSibling.gccSuffix(),
- Paths);
- }
-+#endif
-
- // See comments above on the multilib variant for details of why this is
- // included even from outside the sysroot.
-@@ -429,8 +439,9 @@ Linux::Linux(const Driver &D, const llvm::Triple &Triple, const ArgList &Args)
+@@ -428,9 +434,14 @@ Linux::Linux(const Driver &D, const llvm::Triple &Triple, const ArgList &Args)
+ // directory ('Dir' below) or the ResourceDir.
if (StringRef(D.Dir).startswith(SysRoot))
addPathIfExists(D, D.Dir + "/../lib", Paths);
-
-- addPathIfExists(D, SysRoot + "/lib", Paths);
-- addPathIfExists(D, SysRoot + "/usr/lib", Paths);
++#endif
++
+ // Add libc's lib/ directory to the search path, so that crt1.o, crti.o,
+ // and friends can be found.
+ addPathIfExists(D, "@GLIBC_LIBDIR@", Paths);
+
+- addPathIfExists(D, SysRoot + "/lib", Paths);
+- addPathIfExists(D, SysRoot + "/usr/lib", Paths);
++ // Add GCC's lib/ directory so libstdc++.so can be found.
++ addPathIfExists(D, GCCInstallation.getParentLibPath(), Paths);
}
bool Linux::HasNativeLLVMSupport() const { return true; }