diff options
| author | Andrew Chow <achow101-github@achow101.com> | 2019-10-02 19:52:31 -0400 |
|---|---|---|
| committer | Andrew Chow <achow101-github@achow101.com> | 2019-10-07 14:11:40 -0400 |
| commit | 44f7a8d7a774f82417106c452d793e6f091bc23e (patch) | |
| tree | ddcee2844d7bf38f9d8b75bc28d289e36b45ef94 /configure.ac | |
| parent | a689c119076c7b8dc5b4dea4539e4cbf5adfb72f (diff) | |
Disable _FORTIFY_SOURCE when enable-debug
Since enable-debug disables optimization entirely, _FORTIFY_SOURCE
does nothing as it requires some kind of optimization enabled. It
instead produces a bunch of useless warnings. So explicitly disable
it when enable-debug so that those warnings are not produced.
Diffstat (limited to 'configure.ac')
| -rw-r--r-- | configure.ac | 15 |
1 files changed, 10 insertions, 5 deletions
diff --git a/configure.ac b/configure.ac index 8af9a986d2..a86a876d4f 100644 --- a/configure.ac +++ b/configure.ac @@ -749,12 +749,17 @@ if test x$use_hardening != xno; then AX_CHECK_COMPILE_FLAG([-Wstack-protector],[HARDENED_CXXFLAGS="$HARDENED_CXXFLAGS -Wstack-protector"]) AX_CHECK_COMPILE_FLAG([-fstack-protector-all],[HARDENED_CXXFLAGS="$HARDENED_CXXFLAGS -fstack-protector-all"]) - AX_CHECK_PREPROC_FLAG([-D_FORTIFY_SOURCE=2],[ - AX_CHECK_PREPROC_FLAG([-U_FORTIFY_SOURCE],[ - HARDENED_CPPFLAGS="$HARDENED_CPPFLAGS -U_FORTIFY_SOURCE" + # When enable_debug is yes, all optimizations are disabled. + # However, FORTIFY_SOURCE requires that there is some level of optimization, otherwise it does nothing and just creates a compiler warning. + # Since FORTIFY_SOURCE is a no-op without optimizations, do not enable it when enable_debug is yes. + if test x$enable_debug != xyes; then + AX_CHECK_PREPROC_FLAG([-D_FORTIFY_SOURCE=2],[ + AX_CHECK_PREPROC_FLAG([-U_FORTIFY_SOURCE],[ + HARDENED_CPPFLAGS="$HARDENED_CPPFLAGS -U_FORTIFY_SOURCE" + ]) + HARDENED_CPPFLAGS="$HARDENED_CPPFLAGS -D_FORTIFY_SOURCE=2" ]) - HARDENED_CPPFLAGS="$HARDENED_CPPFLAGS -D_FORTIFY_SOURCE=2" - ]) + fi AX_CHECK_LINK_FLAG([[-Wl,--dynamicbase]], [HARDENED_LDFLAGS="$HARDENED_LDFLAGS -Wl,--dynamicbase"]) AX_CHECK_LINK_FLAG([[-Wl,--nxcompat]], [HARDENED_LDFLAGS="$HARDENED_LDFLAGS -Wl,--nxcompat"]) |