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./configure checks for GCC stack smashing protection

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This commit is contained in:
Andrew Bettison 2014-02-25 14:47:00 +10:30
parent e10c4d92a1
commit 30590ab140
2 changed files with 25 additions and 8 deletions
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2
Makefile.in
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@ -85,7 +85,7 @@ INSTALL_DATA= $(INSTALL) -m 644
# More warnings, discover problems that only happen on some archs
CFLAGS+=-Wextra
# Security enhancements from Debian
CFLAGS+=-fstack-protector --param=ssp-buffer-size=4 -Wformat -Werror=format-security -D_FORTIFY_SOURCE=2
CFLAGS+=-Wformat -Werror=format-security -D_FORTIFY_SOURCE=2
DEFS= @DEFS@

31
configure.in
View File

@ -130,16 +130,33 @@ AC_CHECK_LIB(nsl,callrpc,[LDFLAGS="$LDFLAGS -lnsl"])
AC_CHECK_LIB(socket,socket,[LDFLAGS="$LDFLAGS -lsocket"])
AC_CHECK_LIB(dl,dlopen,[LDFLAGS="$LDFLAGS -ldl"])
AC_CACHE_CHECK(linker -z relro option, libc_cv_z_relro, [dnl
AC_CACHE_CHECK([linker -z relro option], libc_cv_z_relro, [dnl
libc_cv_z_relro=no
if AC_TRY_COMMAND([${CC-cc} -v --help 2>&1|grep "z relro" 1>&AS_MESSAGE_LOG_FD])
then
if AC_TRY_COMMAND([${CC-cc} -Wl,--verbose 2>&1|grep DATA_SEGMENT_RELRO_END 1>&AS_MESSAGE_LOG_FD])
then
AS_IF([AC_TRY_COMMAND([${CC-cc} -v --help 2>&1 | grep "z relro" 1>&AS_MESSAGE_LOG_FD])], [
AS_IF([AC_TRY_COMMAND([${CC-cc} -Wl,--verbose 2>&1 | grep DATA_SEGMENT_RELRO_END 1>&AS_MESSAGE_LOG_FD])], [
libc_cv_z_relro=yes
LDFLAGS="$LDFLAGS -Wl,-z,relro"
fi
fi
])
])
])
dnl Stack smashing protection is not available on all platforms
AC_MSG_CHECKING([for SSP support])
have_ssp=0
save_cflags="$CFLAGS"
CFLAGS="$CFLAGS -fstack-protector --param=ssp-buffer-size=4"
AC_LANG([C])
AC_COMPILE_IFELSE([AC_LANG_PROGRAM([])], [
AC_LINK_IFELSE([AC_LANG_PROGRAM([])], [
have_ssp=1
])
])
AS_IF([test x"$have_ssp" = "x1"], [
AC_MSG_RESULT([yes])
AC_SUBST([HAVE_SSP],1)
], [
AC_MSG_RESULT([no])
CFLAGS="$save_cflags"
])
dnl Some platforms still seem to lack the basic single precision trig and power related function.