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Fix GCC 12 compilation errors

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Squelch false positives reported by GCC 12 with UBSan.

Reviewed-by: Richard Yao <richard.yao@alumni.stonybrook.edu>
Reviewed-by: Brian Behlendorf <behlendorf1@llnl.gov>
Signed-off-by: szubersk <szuberskidamian@gmail.com>
Closes #14150
This commit is contained in:
szubersk
2022-11-30 20:27:28 +10:00
committed by Brian Behlendorf
parent 3a6d89ae52
commit 3c1e1933b6
9 changed files with 125 additions and 4 deletions
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config/always-compiler-options.m4
+56
View File
@@ -227,6 +227,62 @@ AC_DEFUN([ZFS_AC_CONFIG_ALWAYS_CC_INFINITE_RECURSION], [
AC_SUBST([INFINITE_RECURSION])
])
dnl #
dnl # Check if kernel cc supports -Winfinite-recursion option.
dnl #
AC_DEFUN([ZFS_AC_CONFIG_ALWAYS_KERNEL_CC_INFINITE_RECURSION], [
AC_MSG_CHECKING([whether $KERNEL_CC supports -Winfinite-recursion])
saved_cc="$CC"
saved_flags="$CFLAGS"
CC="gcc"
CFLAGS="$CFLAGS -Werror -Winfinite-recursion"
AS_IF([ test -n "$KERNEL_CC" ], [
CC="$KERNEL_CC"
])
AS_IF([ test -n "$KERNEL_LLVM" ], [
CC="clang"
])
AC_COMPILE_IFELSE([AC_LANG_PROGRAM([], [])], [
KERNEL_INFINITE_RECURSION=-Winfinite-recursion
AC_DEFINE([HAVE_KERNEL_INFINITE_RECURSION], 1,
[Define if compiler supports -Winfinite-recursion])
AC_MSG_RESULT([yes])
], [
KERNEL_INFINITE_RECURSION=
AC_MSG_RESULT([no])
])
CC="$saved_cc"
CFLAGS="$saved_flags"
AC_SUBST([KERNEL_INFINITE_RECURSION])
])
dnl #
dnl # Check if cc supports -Wformat-overflow option.
dnl #
AC_DEFUN([ZFS_AC_CONFIG_ALWAYS_CC_FORMAT_OVERFLOW], [
AC_MSG_CHECKING([whether $CC supports -Wformat-overflow])
saved_flags="$CFLAGS"
CFLAGS="$CFLAGS -Werror -Wformat-overflow"
AC_COMPILE_IFELSE([AC_LANG_PROGRAM([], [])], [
FORMAT_OVERFLOW=-Wformat-overflow
AC_DEFINE([HAVE_FORMAT_OVERFLOW], 1,
[Define if compiler supports -Wformat-overflow])
AC_MSG_RESULT([yes])
], [
FORMAT_OVERFLOW=
AC_MSG_RESULT([no])
])
CFLAGS="$saved_flags"
AC_SUBST([FORMAT_OVERFLOW])
])
dnl #
dnl # Check if cc supports -fno-omit-frame-pointer option.
dnl #
config/zfs-build.m4
+2
View File
@@ -211,10 +211,12 @@ AC_DEFUN([ZFS_AC_CONFIG_ALWAYS], [
ZFS_AC_CONFIG_ALWAYS_CC_NO_CLOBBERED
ZFS_AC_CONFIG_ALWAYS_CC_INFINITE_RECURSION
ZFS_AC_CONFIG_ALWAYS_KERNEL_CC_INFINITE_RECURSION
ZFS_AC_CONFIG_ALWAYS_CC_IMPLICIT_FALLTHROUGH
ZFS_AC_CONFIG_ALWAYS_CC_FRAME_LARGER_THAN
ZFS_AC_CONFIG_ALWAYS_CC_NO_FORMAT_TRUNCATION
ZFS_AC_CONFIG_ALWAYS_CC_NO_FORMAT_ZERO_LENGTH
ZFS_AC_CONFIG_ALWAYS_CC_FORMAT_OVERFLOW
ZFS_AC_CONFIG_ALWAYS_CC_NO_OMIT_FRAME_POINTER
ZFS_AC_CONFIG_ALWAYS_CC_NO_IPA_SRA
ZFS_AC_CONFIG_ALWAYS_CC_ASAN