diff options
Diffstat (limited to 'lib/free.c')
-rw-r--r-- | lib/free.c | 14 |
1 files changed, 14 insertions, 0 deletions
diff --git a/lib/free.c b/lib/free.c index 135c3eb16bc..5c89787aba1 100644 --- a/lib/free.c +++ b/lib/free.c @@ -27,7 +27,21 @@ void rpl_free (void *p) #undef free { +#if defined __GNUC__ && !defined __clang__ + /* An invalid GCC optimization + <https://gcc.gnu.org/bugzilla/show_bug.cgi?id=98396> + would optimize away the assignments in the code below, when link-time + optimization (LTO) is enabled. Make the code more complicated, so that + GCC does not grok how to optimize it. */ + int err[2]; + err[0] = errno; + err[1] = errno; + errno = 0; + free (p); + errno = err[errno == 0]; +#else int err = errno; free (p); errno = err; +#endif } |