Date: Tue, 6 Jun 2017 18:40:15 +0000 (UTC) From: Dimitry Andric <dim@FreeBSD.org> To: src-committers@freebsd.org, svn-src-all@freebsd.org, svn-src-stable@freebsd.org, svn-src-stable-10@freebsd.org Subject: svn commit: r319631 - stable/10/lib/clang Message-ID: <201706061840.v56IeFsx041985@repo.freebsd.org>
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Author: dim Date: Tue Jun 6 18:40:14 2017 New Revision: 319631 URL: https://svnweb.freebsd.org/changeset/base/319631 Log: Work around a gcc 4.2 bug on powerpc architectures, where using -fdata-sections can cause bogus "section type conflict" errors. See https://gcc.gnu.org/bugzilla/show_bug.cgi?id=33168 for more information. Since the upstream fixes are under GPLv3 and non-trivial, just disable using function and data sections, at the cost of a slightly larger executable. Direct commit to stable/10, since the version of clang in head and stable/11 cannot be built by gcc 4.2 at all. Modified: stable/10/lib/clang/clang.build.mk Modified: stable/10/lib/clang/clang.build.mk ============================================================================== --- stable/10/lib/clang/clang.build.mk Tue Jun 6 17:27:41 2017 (r319630) +++ stable/10/lib/clang/clang.build.mk Tue Jun 6 18:40:14 2017 (r319631) @@ -31,9 +31,14 @@ TARGET_TRIPLE?= ${TARGET_ARCH:C/amd64/x86_64/}-${TARGE BUILD_TRIPLE?= ${BUILD_ARCH:C/amd64/x86_64/}-unknown-freebsd10.3 CFLAGS+= -DLLVM_DEFAULT_TARGET_TRIPLE=\"${TARGET_TRIPLE}\" \ -DLLVM_HOST_TRIPLE=\"${BUILD_TRIPLE}\" \ - -DDEFAULT_SYSROOT=\"${TOOLS_PREFIX}\" \ - -ffunction-sections -fdata-sections + -DDEFAULT_SYSROOT=\"${TOOLS_PREFIX}\" +# Work around gcc 4.2 "section type conflict" bug with -fdata-sections on +# powerpc: https://gcc.gnu.org/bugzilla/show_bug.cgi?id=33168 +.if !(${MACHINE_CPUARCH} == "powerpc" && ${COMPILER_TYPE} == "gcc" && \ + ${COMPILER_VERSION} < 40300) +CFLAGS+= -ffunction-sections -fdata-sections LDFLAGS+= -Wl,--gc-sections +.endif CXXFLAGS+= -fno-exceptions -fno-rtti .PATH: ${LLVM_SRCS}/${SRCDIR}
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