X-Git-Url: https://git.lttng.org/?a=blobdiff_plain;f=configure.ac;h=032adea94597b029acfa092b5a414193be5d7951;hb=95fa2ba4fbbfac95bca6f437b2bb4389789b21eb;hp=cf2e0e3e75f04d18dbc85fff2781c7203e60238b;hpb=31c7a68a8c6b44e0a19a5f480425e8c9109ad901;p=lttng-ust.git

diff --git a/configure.ac b/configure.ac
index cf2e0e3e..032adea9 100644
--- a/configure.ac
+++ b/configure.ac
@@ -179,6 +179,11 @@ AC_LANG_POP([C])
 # Clang >= 3.3 (required by the project) and are only valid for C code.
 WARN_CFLAGS="${WARN_CFLAGS} -Wold-style-definition -Wstrict-prototypes"
 
+# Disable 'strict aliasing' if the compiler supports it.
+AC_LANG_PUSH([C])
+AX_APPEND_COMPILE_FLAGS([-fno-strict-aliasing], [OPT_CFLAGS], [-Werror])
+AC_LANG_POP([C])
+
 
 ##                     ##
 ## C++ compiler checks ##
@@ -256,6 +261,7 @@ AC_CHECK_FUNCS([ \
   clock_gettime \
   ftruncate \
   getpagesize \
+  gettid \
   gettimeofday \
   localeconv \
   memchr \
@@ -544,7 +550,7 @@ AC_SUBST([LTTNG_UST_CTL_LIBRARY_VERSION], ust_ctl_lib_version)
 # Major soname for python-lttngust
 AC_SUBST([LTTNG_UST_LIB_SONAME_MAJOR], [ust_lib_version_current])
 
-AM_CFLAGS="$WARN_CFLAGS $URCU_CFLAGS $PTHREAD_CFLAGS"
+AM_CFLAGS="$OPT_CFLAGS $WARN_CFLAGS $URCU_CFLAGS $PTHREAD_CFLAGS"
 AC_SUBST(AM_CFLAGS)
 
 AM_CXXFLAGS="$WARN_CXXFLAGS $URCU_CFLAGS $PTHREAD_CFLAGS"