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Enable compiler stack protection flags

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Daniel P. Berrange 2007-03-21 14:52:12 +00:00
parent 07fb9d64b0
commit 1c236e9c25
2 changed files with 36 additions and 32 deletions
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7
ChangeLog
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@ -1,3 +1,10 @@
Wed Mar 21 10:52:06 EST 2007 Daniel P. Berrange <berrange@redhat.com>
* acinclude.m4: Always use -Wp,-D_FORTIFY_SOURCE=2 -fexceptions
-fstack-protector --param=ssp-buffer-size=4
-fasynchronous-unwind-tables if supported by the compiler. Check
all warnings flags for compiler support
Tue Mar 20 10:00:06 EST 2007 Daniel P. Berrange <berrange@redhat.com>
* qemud/conf.c: Fixed buffer overflow in code building up

47
acinclude.m4
View File

@ -12,31 +12,36 @@ AC_DEFUN([LIBVIRT_COMPILE_WARNINGS],[
AC_ARG_ENABLE(compile-warnings,
AC_HELP_STRING([--enable-compile-warnings=@<:@no/minimum/yes/maximum/error@:>@],
[Turn on compiler warnings]),,
[enable_compile_warnings="m4_default([$1],[yes])"])
[enable_compile_warnings="m4_default([$1],[maximum])"])
warnCFLAGS=
if test "x$GCC" != xyes; then
enable_compile_warnings=no
fi
warning_flags=
realsave_CFLAGS="$CFLAGS"
try_compiler_flags="-Wp,-D_FORTIFY_SOURCE=2 -fexceptions -fstack-protector --param=ssp-buffer-size=4 -fasynchronous-unwind-tables"
case "$enable_compile_warnings" in
no)
warning_flags=
;;
minimum)
warning_flags="-Wall"
try_compiler_flags="$try_compiler_flags -Wall"
;;
yes)
warning_flags="-Wall -Wmissing-prototypes"
try_compiler_flags="$try_compiler_flags -Wall -Wmissing-prototypes"
;;
maximum|error)
warning_flags="-Wall -Wmissing-prototypes -Wnested-externs -Wpointer-arith"
warning_flags="$warning_flags -Wextra -Wshadow -Wcast-align -Wwrite-strings -Waggregate-return -Wstrict-prototypes -Winline -Wredundant-decls"
CFLAGS="$warning_flags $CFLAGS"
for option in -Wno-sign-compare; do
try_compiler_flags="$try_compiler_flags -Wall -Wmissing-prototypes -Wnested-externs -Wpointer-arith"
try_compiler_flags="$try_compiler_flags -Wextra -Wshadow -Wcast-align -Wwrite-strings -Waggregate-return"
try_compiler_falgs="$try_compiler_flags -Wstrict-prototypes -Winline -Wredundant-decls -Wno-sign-compare"
if test "$enable_compile_warnings" = "error" ; then
try_compiler_flags="$try_compiler_flags -Werror"
fi
;;
*)
AC_MSG_ERROR(Unknown argument '$enable_compile_warnings' to --enable-compile-warnings)
;;
esac
compiler_flags=
for option in $try_compiler_flags; do
SAVE_CFLAGS="$CFLAGS"
CFLAGS="$CFLAGS $option"
AC_MSG_CHECKING([whether gcc understands $option])
@ -46,23 +51,15 @@ AC_DEFUN([LIBVIRT_COMPILE_WARNINGS],[
CFLAGS="$SAVE_CFLAGS"
AC_MSG_RESULT($has_option)
if test $has_option = yes; then
warning_flags="$warning_flags $option"
compiler_flags="$compiler_flags $option"
fi
unset has_option
unset SAVE_CFLAGS
done
unset option
if test "$enable_compile_warnings" = "error" ; then
warning_flags="$warning_flags -Werror"
fi
;;
*)
AC_MSG_ERROR(Unknown argument '$enable_compile_warnings' to --enable-compile-warnings)
;;
esac
unset try_compiler_flags
CFLAGS="$realsave_CFLAGS"
AC_MSG_CHECKING(what warning flags to pass to the C compiler)
AC_MSG_RESULT($warning_flags)
AC_ARG_ENABLE(iso-c,
AC_HELP_STRING([--enable-iso-c],
@ -85,6 +82,6 @@ AC_DEFUN([LIBVIRT_COMPILE_WARNINGS],[
fi
AC_MSG_RESULT($complCFLAGS)
WARN_CFLAGS="$warning_flags $complCFLAGS"
WARN_CFLAGS="$compiler_flags $complCFLAGS"
AC_SUBST(WARN_CFLAGS)
])