Only set -fno-strict-overflow if -fwrapv is not available.

[meshlink] / configure.ac

diff --git a/configure.ac b/configure.ac
index ed9dc432dae9a1335b11aa7dc6ae6dccab386cf1..b4672e0c91895ba85e7c1c645f8906f3560103b3 100644 (file)
--- a/configure.ac
+++ b/configure.ac
@@ -23,6 +23,7 @@ AC_PROG_CPP
 AC_PROG_INSTALL
 AC_PROG_LN_S
 AC_PROG_LIBTOOL
+AX_PTHREAD
 
 dnl Check and set OS
 
@@ -58,8 +59,9 @@ dnl No -fstack-protector-all because it doesn't work on all platforms or archite
 AC_ARG_ENABLE([hardening], AS_HELP_STRING([--disable-hardening], [disable compiler and linker hardening flags]))
 AS_IF([test "x$enable_hardening" != "xno"],
   [AX_CHECK_COMPILE_FLAG([-DFORTIFY_SOURCE=2], [CPPFLAGS="$CPPFLAGS -DFORITFY_SOURCE=2"])
-   AX_CHECK_COMPILE_FLAG([-fno-strict-overflow], [CPPFLAGS="$CPPFLAGS -fno-strict-overflow"])
-   AX_CHECK_COMPILE_FLAG([-fwrapv], [CPPFLAGS="$CPPFLAGS -fwrapv"])
+   AX_CHECK_COMPILE_FLAG([-fwrapv], [CPPFLAGS="$CPPFLAGS -fwrapv"],
+     [AX_CHECK_COMPILE_FLAG([-fno-strict-overflow], [CPPFLAGS="$CPPFLAGS -fno-strict-overflow"])]
+   )
    case $host_os in
      *mingw*)
        AX_CHECK_LINK_FLAG([-Wl,--dynamicbase], [LDFLAGS="$LDFLAGS -Wl,--dynamicbase"])