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gnu: clang@11, clang@12: Do not refer to /lib on foreign distros.

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Partly fixes <https://issues.guix.gnu.org/51088>.

* gnu/packages/patches/clang-11.0-libc-search-path.patch: Update.
* gnu/packages/patches/clang-12.0-libc-search-path.patch: New file.
* gnu/local.mk (dist_patch_DATA): Add it.
* gnu/packages/llvm.scm (clang-12): Use it.
This commit is contained in:
Ludovic Courtès 2021-10-09 00:39:04 +02:00
parent f1b4f46f0a
commit b37fe44b7d
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GPG Key ID: 090B11993D9AEBB5
4 changed files with 134 additions and 54 deletions
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1
gnu/local.mk
View File

@ -936,6 +936,7 @@ dist_patch_DATA = \
%D%/packages/patches/clang-9.0-libc-search-path.patch \
%D%/packages/patches/clang-10.0-libc-search-path.patch \
%D%/packages/patches/clang-11.0-libc-search-path.patch \
%D%/packages/patches/clang-12.0-libc-search-path.patch \
%D%/packages/patches/clang-runtime-asan-build-fixes.patch \
%D%/packages/patches/clang-runtime-esan-build-fixes.patch \
%D%/packages/patches/clang-runtime-9-libsanitizer-mode-field.patch \

2
gnu/packages/llvm.scm
View File

@ -547,7 +547,7 @@ of programming tools as well as libraries with equivalent functionality.")
(define-public clang-12
(clang-from-llvm llvm-12 clang-runtime-12
"0px4gl27az6cdz6adds89qzdwb1cqpjsfvrldbz9qvpmphrj34bf"
#:patches '("clang-11.0-libc-search-path.patch")
#:patches '("clang-12.0-libc-search-path.patch")
#:tools-extra
(origin
(method url-fetch)

101
gnu/packages/patches/clang-11.0-libc-search-path.patch
View File

@ -4,48 +4,47 @@ 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-Guix systems.
to make sure Clang also works on foreign distros.
diff --git a/lib/Driver/ToolChains/Gnu.cpp b/lib/Driver/ToolChains/Gnu.cpp
--- a/lib/Driver/ToolChains/Gnu.cpp
+++ b/lib/Driver/ToolChains/Gnu.cpp
@@ -2797,7 +2797,7 @@ void Generic_GCC::AddMultilibPaths(const Driver &D,
// 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);
}
@@ -2811,6 +2811,10 @@ void Generic_GCC::AddMultiarchPaths(const Driver &D,
// 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,
@@ -2823,6 +2827,7 @@ void Generic_GCC::AddMultiarchPaths(const Driver &D,
D, GCCInstallation.getInstallPath() + BiarchSibling.gccSuffix(),
Paths);
}
+#endif // Guix
diff --git a/lib/Driver/Distro.cpp b/lib/Driver/Distro.cpp
index 4d58ad1a..6f638eca 100644
--- a/lib/Driver/Distro.cpp
+++ b/lib/Driver/Distro.cpp
@@ -21,6 +21,10 @@ using namespace clang;
// See comments above on the multilib variant for details of why this is
// included even from outside the sysroot.
static Distro::DistroType DetectDistro(llvm::vfs::FileSystem &VFS,
const llvm::Triple &TargetOrHost) {
+ // The compiler should always behave the same, even when used via Guix on a
+ // foreign distro.
+ return Distro::UnknownDistro;
+
// If we don't target Linux, no need to check the distro. This saves a few
// OS calls.
if (!TargetOrHost.isOSLinux())
diff --git a/lib/Driver/ToolChains/Cuda.cpp b/lib/Driver/ToolChains/Cuda.cpp
index 110a0bca..42b9f7b7 100644
--- a/lib/Driver/ToolChains/Cuda.cpp
+++ b/lib/Driver/ToolChains/Cuda.cpp
@@ -67,6 +67,9 @@ 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 18035047..ace8f443 100644
--- a/lib/Driver/ToolChains/Linux.cpp
+++ b/lib/Driver/ToolChains/Linux.cpp
@@ -219,6 +219,9 @@ Linux::Linux(const Driver &D, const llvm::Triple &Triple, const ArgList &Args)
Generic_GCC::PushPPaths(PPaths);
+// Comment out the distro-specific tweaks so that they don't bite when
+// using Guix on a foreign distro.
+ // Comment out the distro-specific tweaks so that they don't bite when
+ // using Guix on a foreign distro.
+#if 0
Distro Distro(D.getVFS(), Triple);
@ -54,36 +53,32 @@ diff --git a/lib/Driver/ToolChains/Linux.cpp b/lib/Driver/ToolChains/Linux.cpp
if (IsAndroid || Distro.IsOpenSUSE())
ExtraOpts.push_back("--enable-new-dtags");
+#endif // Guix
+#endif
// 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.
@@ -310,6 +314,8 @@ Linux::Linux(const Driver &D, const llvm::Triple &Triple, const ArgList &Args)
addPathIfExists(D, SysRoot + "/lib/" + MultiarchTriple, Paths);
addPathIfExists(D, SysRoot + "/lib/../" + OSLibDir, Paths);
@@ -297,6 +301,7 @@ Linux::Linux(const Driver &D, const llvm::Triple &Triple, const ArgList &Args)
Generic_GCC::AddMultilibPaths(D, SysRoot, OSLibDir, MultiarchTriple, 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
@@ -338,6 +344,7 @@ 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 // Guix
Generic_GCC::AddMultiarchPaths(D, SysRoot, OSLibDir, Paths);
@@ -349,8 +356,9 @@ Linux::Linux(const Driver &D, const llvm::Triple &Triple, const ArgList &Args)
// 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.
@@ -348,9 +353,14 @@ 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);
}
ToolChain::CXXStdlibType Linux::GetDefaultCXXStdlibType() const {

84
gnu/packages/patches/clang-12.0-libc-search-path.patch Normal file
View File

@ -0,0 +1,84 @@
Clang attempts to guess file names based on the OS and distro (yes!),
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 foreign distros.
diff --git a/lib/Driver/Distro.cpp b/lib/Driver/Distro.cpp
index ee4fe841..f0313bbe 100644
--- a/lib/Driver/Distro.cpp
+++ b/lib/Driver/Distro.cpp
@@ -93,6 +93,10 @@ static Distro::DistroType DetectLsbRelease(llvm::vfs::FileSystem &VFS) {
}
static Distro::DistroType DetectDistro(llvm::vfs::FileSystem &VFS) {
+ // The compiler should always behave the same, even when used via Guix on a
+ // foreign distro.
+ return Distro::UnknownDistro;
+
Distro::DistroType Version = Distro::UnknownDistro;
// Newer freedesktop.org's compilant systemd-based systems
diff --git a/lib/Driver/ToolChains/Cuda.cpp b/lib/Driver/ToolChains/Cuda.cpp
index d14776c5..88bc3ccd 100644
--- a/lib/Driver/ToolChains/Cuda.cpp
+++ b/lib/Driver/ToolChains/Cuda.cpp
@@ -119,6 +119,9 @@ 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 9663a739..107f96d6 100644
--- a/lib/Driver/ToolChains/Linux.cpp
+++ b/lib/Driver/ToolChains/Linux.cpp
@@ -223,6 +223,9 @@ Linux::Linux(const Driver &D, const llvm::Triple &Triple, const ArgList &Args)
Generic_GCC::PushPPaths(PPaths);
+ // Comment out the distro-specific tweaks so that they don't bite when
+ // using Guix on a foreign distro.
+#if 0
Distro Distro(D.getVFS(), Triple);
if (Distro.IsAlpineLinux() || Triple.isAndroid()) {
@@ -288,6 +291,7 @@ Linux::Linux(const Driver &D, const llvm::Triple &Triple, const ArgList &Args)
if (IsAndroid || Distro.IsOpenSUSE())
ExtraOpts.push_back("--enable-new-dtags");
+#endif
// 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.
@@ -301,6 +305,7 @@ Linux::Linux(const Driver &D, const llvm::Triple &Triple, const ArgList &Args)
Generic_GCC::AddMultilibPaths(D, SysRoot, OSLibDir, MultiarchTriple, Paths);
+#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.
@@ -352,9 +357,14 @@ 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);
+#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);
}
ToolChain::CXXStdlibType Linux::GetDefaultCXXStdlibType() const {