Revert "build: enable LTO and _FORTIFY_SOURCE with optimization"
This reverts commit 27bcc9111b63e94d091c3fa47e81fe52b806cd3e.
Let the distro decide about this flag. It's relatively recent and
doesn't work well with gcc 4.[678] making the testsuite to fail.
diff --git a/configure.ac b/configure.ac
index 5948cf3..3dde5d9 100644
--- a/configure.ac
+++ b/configure.ac
@@ -226,19 +226,9 @@
-fvisibility=hidden \
-ffunction-sections \
-fdata-sections])
-
-AS_CASE([$CFLAGS], [*-O[[12345\ ]]*],
- [CC_CHECK_FLAGS_APPEND([with_cflags], [CFLAGS], [\
- -flto -ffat-lto-objects])],
- [AC_MSG_RESULT([skipping -flto, optimization not enabled])])
-
-AS_CASE([$CFLAGS], [*-O[[12345\ ]]*],
- [CC_CHECK_FLAGS_APPEND([with_cppflags], [CPPFLAGS], [\
- -Wp,-D_FORTIFY_SOURCE=2])],
- [AC_MSG_RESULT([skipping -D_FORTIFY_SOURCE, optimization not enabled])])
-
AC_SUBST([OUR_CFLAGS], "$with_cflags $with_coverage_cflags")
+
CC_CHECK_FLAGS_APPEND([with_ldflags], [LDFLAGS], [ \
-Wl,--as-needed \
-Wl,--no-undefined \
