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enable full GCC Stack-smashing protection for all OSes

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- change our hardening options to use -fstack-protector-all even for
  Windows builds, as we recently switched to a newer compiler suite
- also removes an obsolete workaround for GCC 4.5
  (https://bugs.launchpad.net/ubuntu/+source/gcc-4.5/+bug/691722), which
  required to first set -fno-stack-protector, before -fstack-protector-all
This commit is contained in:
Philip Kaufmann 2013-10-05 13:02:47 +02:00
parent 2f06b5965a
commit 4e57e23833
1 changed files with 1 additions and 4 deletions
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5
configure.ac
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@ -284,6 +284,7 @@ AX_CHECK_LINK_FLAG([[-Wl,--large-address-aware]], [LDFLAGS="$LDFLAGS -Wl,--large
if test x$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_COMPILE_FLAG([-fPIE],[HARDENED_CXXFLAGS="$HARDENED_CXXFLAGS -fPIE"])
AX_CHECK_PREPROC_FLAG([-D_FORTIFY_SOURCE=2],[
@ -299,10 +300,6 @@ if test x$use_hardening != xno; then
AX_CHECK_LINK_FLAG([[-Wl,-z,now]], [LDFLAGS="-Wl,-z,now"])
if test x$TARGET_OS != xwindows; then
# -fstack-protector-all can produce broken binaries with mingw
AX_CHECK_COMPILE_FLAG([-fno-stack-protector],[HARDENED_CXXFLAGS="$HARDENED_CXXFLAGS -fno-stack-protector"])
AX_CHECK_COMPILE_FLAG([-fstack-protector-all],[HARDENED_CXXFLAGS="$HARDENED_CXXFLAGS -fstack-protector-all"])
# -pie will link successfully with MinGW, but it's unsupported and leads to undeterministic binaries
AX_CHECK_LINK_FLAG([[-pie]], [HARDENED_LDFLAGS="$HARDENED_LDFLAGS -pie"])
fi