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From d68a5a7817dc0d43853d8b84c9185dc24338664f Mon Sep 17 00:00:00 2001
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From: Tom Stellard <tstellar@redhat.com>
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Date: Wed, 6 Oct 2021 05:32:44 +0000
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Subject: [PATCH] Driver: Add a gcc equivalent triple to the list of triples to
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search
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There are some gcc triples, like x86_64-redhat-linux, that provide the
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same behavior as a clang triple with a similar name (e.g.
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x86_64-redhat-linux-gnu). When searching for a gcc install, also search
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for a gcc equivalent triple if one exists.
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Differential Revision: https://reviews.llvm.org/D111207
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---
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clang/lib/Driver/ToolChains/Gnu.cpp | 22 ++++++++++++++++++++++
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1 file changed, 22 insertions(+)
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diff --git a/clang/lib/Driver/ToolChains/Gnu.cpp b/clang/lib/Driver/ToolChains/Gnu.cpp
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index fe5bda5c6605..fd4a7f72be14 100644
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--- a/clang/lib/Driver/ToolChains/Gnu.cpp
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+++ b/clang/lib/Driver/ToolChains/Gnu.cpp
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@@ -1884,6 +1884,18 @@ static llvm::StringRef getGCCToolchainDir(const ArgList &Args,
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return GCC_INSTALL_PREFIX;
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}
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+/// This function takes a 'clang' triple and converts it to an equivalent gcc
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+/// triple.
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+static const char *ConvertToGccTriple(StringRef CandidateTriple) {
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+ return llvm::StringSwitch<const char *>(CandidateTriple)
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+ .Case("aarch64-redhat-linux-gnu", "aarch64-redhat-linux")
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+ .Case("i686-redhat-linux-gnu", "i686-redhat-linux")
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+ .Case("ppc64le-redhat-linux-gnu", "ppc64le-redhat-linux")
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+ .Case("s390x-redhat-linux-gnu", "s390x-redhat-linux")
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+ .Case("x86_64-redhat-linux-gnu", "x86_64-redhat-linux")
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+ .Default(NULL);
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+}
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+
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/// Initialize a GCCInstallationDetector from the driver.
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///
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/// This performs all of the autodetection and sets up the various paths.
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@@ -1904,6 +1916,16 @@ void Generic_GCC::GCCInstallationDetector::init(
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// The compatible GCC triples for this particular architecture.
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SmallVector<StringRef, 16> CandidateTripleAliases;
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SmallVector<StringRef, 16> CandidateBiarchTripleAliases;
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+
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+ // In some cases gcc uses a slightly different triple than clang for the
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+ // same target. Convert the clang triple to the gcc equivalent and use that
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+ // to search for the gcc install.
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+ const char *ConvertedTriple = ConvertToGccTriple(TargetTriple.str());
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+ if (ConvertedTriple) {
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+ CandidateTripleAliases.push_back(ConvertedTriple);
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+ CandidateBiarchTripleAliases.push_back(ConvertedTriple);
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+ }
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+
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CollectLibDirsAndTriples(TargetTriple, BiarchVariantTriple, CandidateLibDirs,
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CandidateTripleAliases, CandidateBiarchLibDirs,
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CandidateBiarchTripleAliases);
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--
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2.26.2
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