From 9b4e03b27b04f6dc687409a13859d59bb7909d8f Mon Sep 17 00:00:00 2001 From: Luke Dashjr Date: Tue, 12 Nov 2013 21:01:36 +0000 Subject: [PATCH] Bugfix: Undefine _FORTIFY_SOURCE before redefining it, to avoid warnings on compilers that define it by default --- configure.ac | 7 ++++++- 1 file changed, 6 insertions(+), 1 deletion(-) diff --git a/configure.ac b/configure.ac index d12ccd24b..994c74858 100644 --- a/configure.ac +++ b/configure.ac @@ -286,7 +286,12 @@ if test x$use_hardening != xno; then AX_CHECK_COMPILE_FLAG([-Wstack-protector],[HARDENED_CXXFLAGS="$HARDENED_CXXFLAGS -Wstack-protector"]) AX_CHECK_COMPILE_FLAG([-fPIE],[HARDENED_CXXFLAGS="$HARDENED_CXXFLAGS -fPIE"]) - AX_CHECK_PREPROC_FLAG([-D_FORTIFY_SOURCE=2],[HARDENED_CPPFLAGS="$HARDENED_CPPFLAGS -D_FORTIFY_SOURCE=2"]) + AX_CHECK_PREPROC_FLAG([-D_FORTIFY_SOURCE=2],[ + AX_CHECK_PREPROC_FLAG([-U_FORTIFY_SOURCE],[ + HARDENED_CPPFLAGS="$HARDENED_CPPFLAGS -U_FORTIFY_SOURCE" + ]) + HARDENED_CPPFLAGS="$HARDENED_CPPFLAGS -D_FORTIFY_SOURCE=2" + ]) AX_CHECK_LINK_FLAG([[-Wl,--dynamicbase]], [HARDENED_LDFLAGS="$HARDENED_LDFLAGS -Wl,--dynamicbase"]) AX_CHECK_LINK_FLAG([[-Wl,--nxcompat]], [HARDENED_LDFLAGS="$HARDENED_LDFLAGS -Wl,--nxcompat"])