On Fri, Dec 02, 2016 at 02:04:53PM -0800, Wan-Teh Chang wrote: > -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.hL61stP9.o /tmp/ffconf.YO6ZaSFG.c > clang: warning: argument unused during compilation: '-pie' > clang -fsanitize=thread -pie -Wl,--as-needed -Wl,-z,noexecstack -o > /tmp/ffconf.W5c2e41l /tmp/ffconf.hL61stP9.o -lbz2 -pthread > /usr/bin/ld: /tmp/ffconf.hL61stP9.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 <w...@google.com> > --- > configure | 2 +- > 1 file changed, 1 insertion(+), 1 deletion(-)
applied thx [...] -- Michael GnuPG fingerprint: 9FF2128B147EF6730BADF133611EC787040B0FAB Modern terrorism, a quick summary: Need oil, start war with country that has oil, kill hundread thousand in war. Let country fall into chaos, be surprised about raise of fundamantalists. Drop more bombs, kill more people, be surprised about them taking revenge and drop even more bombs and strip your own citizens of their rights and freedoms. to be continued
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