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authorWan-Teh Chang <wtc@google.com>2016-12-02 11:27:17 -0800
committerLuca Barbato <lu_zero@gentoo.org>2016-12-06 20:34:25 +0100
commitf22da2cdf90dc892d483e2d4003cffc0500816f6 (patch)
treee3dcf6a44264c3fc0970beee1326011683b96a44 /configure
parent404cb74793284aa03e2e1a7e911c980c4cba0e9e (diff)
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configure: add -fPIE instead of -pie to C flags for ThreadSanitizer
-pie was added to C flags for ThreadSanitizer in commit 19f251a2882a8d0779b432e63bf282e4d9c443bb. Under clang 3.8.0, the -pie flag causes a compiler warning and a linker error when running configure --toolchain=clang-tsan. Here is an excerpt from config.log: clang ... -fsanitize=thread -pie -std=c11 -fomit-frame-pointer -pthread -c -o /tmp/ffconf.A8SsaoCF.o /tmp/ffconf.JdpujQlD.c clang: warning: argument unused during compilation: '-pie' clang -fsanitize=thread -pie -Wl,--as-needed -o /tmp/ffconf.2iYA4bsw /tmp/ffconf.A8SsaoCF.o -lm -lm -lbz2 -lz -pthread /usr/bin/ld: /tmp/ffconf.A8SsaoCF.o: relocation R_X86_64_PC32 against undefined symbol `atan2f@@GLIBC_2.2.5' can not be used when making a shared object; recompile with -fPIC /usr/bin/ld: final link failed: Bad value clang: error: linker command failed with exit code 1 (use -v to see invocation) To be conservative, I changed -pie to -fPIE. But the documentation seems to imply just -fsanitize=thread is enough: http://clang.llvm.org/docs/ThreadSanitizer.html https://github.com/google/sanitizers/wiki/ThreadSanitizerCppManual Signed-off-by: Wan-Teh Chang <wtc@google.com> Signed-off-by: Luca Barbato <lu_zero@gentoo.org>
Diffstat (limited to 'configure')
-rwxr-xr-xconfigure2
1 files changed, 1 insertions, 1 deletions
diff --git a/configure b/configure
index 4c11e5e..1183090 100755
--- a/configure
+++ b/configure
@@ -2819,7 +2819,7 @@ case "$toolchain" in
;;
*-tsan)
cc_default="${toolchain%-tsan}"
- add_cflags -fsanitize=thread -pie
+ add_cflags -fsanitize=thread -fPIE
add_ldflags -fsanitize=thread -pie
case "$toolchain" in
gcc-tsan)
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