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| author | Jason Evans <jasone@canonware.com> | 2013-12-06 07:01:50 (GMT) |
|---|---|---|
| committer | Jason Evans <jasone@canonware.com> | 2013-12-06 07:01:50 (GMT) |
| commit | d37d5adee4e4570cfda83e5f1b948a25b9226224 (patch) | |
| tree | c69c1d7a8ccb3b73c2cdadee8ed732461cd0300b /configure.ac | |
| parent | dc1bed62272045651e4bbf2cd85f6fccaf7b1331 (diff) | |
| download | jemalloc-d37d5adee4e4570cfda83e5f1b948a25b9226224.zip jemalloc-d37d5adee4e4570cfda83e5f1b948a25b9226224.tar.gz jemalloc-d37d5adee4e4570cfda83e5f1b948a25b9226224.tar.bz2 | |
Disable floating point code/linking when possible.
Unless heap profiling is enabled, disable floating point code and don't
link with libm. This, in combination with e.g. EXTRA_CFLAGS=-mno-sse on
x64 systems, makes it possible to completely disable floating point
register use. Some versions of glibc neglect to save/restore
caller-saved floating point registers during dynamic lazy symbol
loading, and the symbol loading code uses whatever malloc the
application happens to have linked/loaded with, the result being
potential floating point register corruption.
Diffstat (limited to 'configure.ac')
| -rw-r--r-- | configure.ac | 11 |
1 files changed, 6 insertions, 5 deletions
diff --git a/configure.ac b/configure.ac index 7f0fecc..1103cc7 100644 --- a/configure.ac +++ b/configure.ac @@ -356,11 +356,6 @@ AC_SUBST([ARFLAGS]) AC_SUBST([AROUT]) AC_SUBST([CC_MM]) -if test "x$abi" != "xpecoff"; then - dnl Heap profiling uses the log(3) function. - LIBS="$LIBS -lm" -fi - JE_COMPILABLE([__attribute__ syntax], [static __attribute__((unused)) void foo(void){}], [], @@ -774,6 +769,12 @@ if test "x$enable_prof" = "x1" ; then AC_MSG_ERROR([Heap profiling requires TLS]); fi force_tls="1" + + if test "x$abi" != "xpecoff"; then + dnl Heap profiling uses the log(3) function. + LIBS="$LIBS -lm" + fi + AC_DEFINE([JEMALLOC_PROF], [ ]) fi AC_SUBST([enable_prof]) |