dnl #
-dnl # Enabled -fsanitize=address if supported by gcc.
+dnl # Enabled -fsanitize=address if supported by $CC.
dnl #
dnl # LDFLAGS needs -fsanitize=address at all times so libraries compiled with
dnl # it will be linked successfully. CFLAGS will vary by binary being built.
])
dnl #
-dnl # Check if gcc supports -Wframe-larger-than=<size> option.
+dnl # Enabled -fsanitize=undefined if supported by cc.
+dnl #
+dnl # LDFLAGS needs -fsanitize=undefined at all times so libraries compiled with
+dnl # it will be linked successfully. CFLAGS will vary by binary being built.
+dnl #
+dnl # The UBSAN_OPTIONS environment variable can be used to further control
+dnl # the behavior of binaries and libraries build with -fsanitize=undefined.
+dnl #
+AC_DEFUN([ZFS_AC_CONFIG_ALWAYS_CC_UBSAN], [
+ AC_MSG_CHECKING([whether to build with -fsanitize=undefined support])
+ AC_ARG_ENABLE([ubsan],
+ [AS_HELP_STRING([--enable-ubsan],
+ [Enable -fsanitize=undefined support @<:@default=no@:>@])],
+ [],
+ [enable_ubsan=no])
+
+ AM_CONDITIONAL([UBSAN_ENABLED], [test x$enable_ubsan = xyes])
+ AC_SUBST([UBSAN_ENABLED], [$enable_ubsan])
+ AC_MSG_RESULT($enable_ubsan)
+
+ AS_IF([ test "$enable_ubsan" = "yes" ], [
+ AC_MSG_CHECKING([whether $CC supports -fsanitize=undefined])
+ saved_cflags="$CFLAGS"
+ CFLAGS="$CFLAGS -Werror -fsanitize=undefined"
+ AC_LINK_IFELSE([
+ AC_LANG_SOURCE([[ int main() { return 0; } ]])
+ ], [
+ UBSAN_CFLAGS="-fsanitize=undefined"
+ UBSAN_LDFLAGS="-fsanitize=undefined"
+ UBSAN_ZFS="_with_ubsan"
+ AC_MSG_RESULT([yes])
+ ], [
+ AC_MSG_ERROR([$CC does not support -fsanitize=undefined])
+ ])
+ CFLAGS="$saved_cflags"
+ ], [
+ UBSAN_CFLAGS=""
+ UBSAN_LDFLAGS=""
+ UBSAN_ZFS="_without_ubsan"
+ ])
+
+ AC_SUBST([UBSAN_CFLAGS])
+ AC_SUBST([UBSAN_LDFLAGS])
+ AC_SUBST([UBSAN_ZFS])
+])
+
+dnl #
+dnl # Check if cc supports -Wframe-larger-than=<size> option.
dnl #
AC_DEFUN([ZFS_AC_CONFIG_ALWAYS_CC_FRAME_LARGER_THAN], [
AC_MSG_CHECKING([whether $CC supports -Wframe-larger-than=<size>])
])
dnl #
-dnl # Check if gcc supports -Wno-format-truncation option.
+dnl # Check if cc supports -Wno-format-truncation option.
dnl #
AC_DEFUN([ZFS_AC_CONFIG_ALWAYS_CC_NO_FORMAT_TRUNCATION], [
AC_MSG_CHECKING([whether $CC supports -Wno-format-truncation])
])
dnl #
-dnl # Check if gcc supports -Wno-format-truncation option.
+dnl # Check if cc supports -Wno-format-zero-length option.
dnl #
AC_DEFUN([ZFS_AC_CONFIG_ALWAYS_CC_NO_FORMAT_ZERO_LENGTH], [
AC_MSG_CHECKING([whether $CC supports -Wno-format-zero-length])
AC_SUBST([NO_FORMAT_ZERO_LENGTH])
])
-
dnl #
-dnl # Check if gcc supports -Wno-bool-compare option.
+dnl # Check if cc supports -Wno-clobbered option.
dnl #
-dnl # We actually invoke gcc with the -Wbool-compare option
+dnl # We actually invoke it with the -Wclobbered option
dnl # and infer the 'no-' version does or doesn't exist based upon
dnl # the results. This is required because when checking any of
dnl # no- prefixed options gcc always returns success.
dnl #
-AC_DEFUN([ZFS_AC_CONFIG_ALWAYS_CC_NO_BOOL_COMPARE], [
- AC_MSG_CHECKING([whether $CC supports -Wno-bool-compare])
+AC_DEFUN([ZFS_AC_CONFIG_ALWAYS_CC_NO_CLOBBERED], [
+ AC_MSG_CHECKING([whether $CC supports -Wno-clobbered])
saved_flags="$CFLAGS"
- CFLAGS="$CFLAGS -Werror -Wbool-compare"
+ CFLAGS="$CFLAGS -Werror -Wclobbered"
AC_COMPILE_IFELSE([AC_LANG_PROGRAM([], [])], [
- NO_BOOL_COMPARE=-Wno-bool-compare
+ NO_CLOBBERED=-Wno-clobbered
AC_MSG_RESULT([yes])
], [
- NO_BOOL_COMPARE=
+ NO_CLOBBERED=
AC_MSG_RESULT([no])
])
CFLAGS="$saved_flags"
- AC_SUBST([NO_BOOL_COMPARE])
+ AC_SUBST([NO_CLOBBERED])
])
dnl #
-dnl # Check if gcc supports -Wno-unused-but-set-variable option.
+dnl # Check if cc supports -Wimplicit-fallthrough option.
dnl #
-dnl # We actually invoke gcc with the -Wunused-but-set-variable option
-dnl # and infer the 'no-' version does or doesn't exist based upon
-dnl # the results. This is required because when checking any of
-dnl # no- prefixed options gcc always returns success.
+AC_DEFUN([ZFS_AC_CONFIG_ALWAYS_CC_IMPLICIT_FALLTHROUGH], [
+ AC_MSG_CHECKING([whether $CC supports -Wimplicit-fallthrough])
+
+ saved_flags="$CFLAGS"
+ CFLAGS="$CFLAGS -Werror -Wimplicit-fallthrough"
+
+ AC_COMPILE_IFELSE([AC_LANG_PROGRAM([], [])], [
+ IMPLICIT_FALLTHROUGH=-Wimplicit-fallthrough
+ AC_DEFINE([HAVE_IMPLICIT_FALLTHROUGH], 1,
+ [Define if compiler supports -Wimplicit-fallthrough])
+ AC_MSG_RESULT([yes])
+ ], [
+ IMPLICIT_FALLTHROUGH=
+ AC_MSG_RESULT([no])
+ ])
+
+ CFLAGS="$saved_flags"
+ AC_SUBST([IMPLICIT_FALLTHROUGH])
+])
+
+dnl #
+dnl # Check if cc supports -Winfinite-recursion option.
dnl #
-AC_DEFUN([ZFS_AC_CONFIG_ALWAYS_CC_NO_UNUSED_BUT_SET_VARIABLE], [
- AC_MSG_CHECKING([whether $CC supports -Wno-unused-but-set-variable])
+AC_DEFUN([ZFS_AC_CONFIG_ALWAYS_CC_INFINITE_RECURSION], [
+ AC_MSG_CHECKING([whether $CC supports -Winfinite-recursion])
saved_flags="$CFLAGS"
- CFLAGS="$CFLAGS -Werror -Wunused-but-set-variable"
+ CFLAGS="$CFLAGS -Werror -Winfinite-recursion"
AC_COMPILE_IFELSE([AC_LANG_PROGRAM([], [])], [
- NO_UNUSED_BUT_SET_VARIABLE=-Wno-unused-but-set-variable
+ INFINITE_RECURSION=-Winfinite-recursion
+ AC_DEFINE([HAVE_INFINITE_RECURSION], 1,
+ [Define if compiler supports -Winfinite-recursion])
AC_MSG_RESULT([yes])
], [
- NO_UNUSED_BUT_SET_VARIABLE=
+ INFINITE_RECURSION=
AC_MSG_RESULT([no])
])
CFLAGS="$saved_flags"
- AC_SUBST([NO_UNUSED_BUT_SET_VARIABLE])
+ AC_SUBST([INFINITE_RECURSION])
])
dnl #
-dnl # Check if gcc supports -fno-omit-frame-pointer option.
+dnl # Check if cc supports -fno-omit-frame-pointer option.
dnl #
AC_DEFUN([ZFS_AC_CONFIG_ALWAYS_CC_NO_OMIT_FRAME_POINTER], [
AC_MSG_CHECKING([whether $CC supports -fno-omit-frame-pointer])
projects / mirror_zfs.git / blobdiff