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[lttng-ust.git] / configure.ac

diff --git a/configure.ac b/configure.ac
index cf2e0e3e75f04d18dbc85fff2781c7203e60238b..032adea94597b029acfa092b5a414193be5d7951 100644 (file)
--- 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"