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Fix Clang 15 compilation errors

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- Clang 15 doesn't support `-fno-ipa-sra` anymore. Do a separate
  check for `-fno-ipa-sra` support by $KERNEL_CC.

- Don't enable `-mgeneral-regs-only` for certain module files.
  Fix #13260

- Scope `GCC diagnostic ignored` statements to GCC only. Clang
  doesn't need them to compile the code.

Porting notes:
- Moved the stanzas removing -mgeneral-regs-only to Makefile.in
  since they wouldn't readily work in Kbuild.in and that did.

Reviewed-by: Richard Yao <richard.yao@alumni.stonybrook.edu>
Reviewed-by: Brian Behlendorf <behlendorf1@llnl.gov>
Signed-off-by: szubersk <szuberskidamian@gmail.com>
Closes #13260
Closes #14150

Closes #14624
Ported-by: Rich Ercolani <rincebrain@gmail.com
Signed-off-by: Rich Ercolani <rincebrain@gmail.com>
This commit is contained in:
szubersk
2022-11-30 20:27:28 +10:00
committed by Tony Hutter
parent 1322f07ade
commit dbbc2f9688
9 changed files with 54 additions and 3 deletions
Download Patch File Download Diff File Expand all files Collapse all files
config/always-compiler-options.m4
+31
View File
@@ -221,3 +221,34 @@ AC_DEFUN([ZFS_AC_CONFIG_ALWAYS_CC_NO_IPA_SRA], [
CFLAGS="$saved_flags"
AC_SUBST([NO_IPA_SRA])
])
dnl #
dnl # Check if kernel cc supports -fno-ipa-sra option.
dnl #
AC_DEFUN([ZFS_AC_CONFIG_ALWAYS_KERNEL_CC_NO_IPA_SRA], [
AC_MSG_CHECKING([whether $KERNEL_CC supports -fno-ipa-sra])
saved_cc="$CC"
saved_flags="$CFLAGS"
CC="gcc"
CFLAGS="$CFLAGS -Werror -fno-ipa-sra"
AS_IF([ test -n "$KERNEL_CC" ], [
CC="$KERNEL_CC"
])
AS_IF([ test -n "$KERNEL_LLVM" ], [
CC="clang"
])
AC_COMPILE_IFELSE([AC_LANG_PROGRAM([], [])], [
KERNEL_NO_IPA_SRA=-fno-ipa-sra
AC_MSG_RESULT([yes])
], [
KERNEL_NO_IPA_SRA=
AC_MSG_RESULT([no])
])
CC="$saved_cc"
CFLAGS="$saved_flags"
AC_SUBST([KERNEL_NO_IPA_SRA])
])
config/zfs-build.m4
+2 -1
View File
@@ -81,7 +81,7 @@ AC_DEFUN([ZFS_AC_DEBUG], [
AC_DEFUN([ZFS_AC_DEBUGINFO_ENABLE], [
DEBUG_CFLAGS="$DEBUG_CFLAGS -g -fno-inline $NO_IPA_SRA"
KERNEL_DEBUG_CFLAGS="$KERNEL_DEBUG_CFLAGS -fno-inline $NO_IPA_SRA"
KERNEL_DEBUG_CFLAGS="$KERNEL_DEBUG_CFLAGS -fno-inline $KERNEL_NO_IPA_SRA"
KERNEL_MAKE="$KERNEL_MAKE CONFIG_DEBUG_INFO=y"
DEBUGINFO_ZFS="_with_debuginfo"
@@ -217,6 +217,7 @@ AC_DEFUN([ZFS_AC_CONFIG_ALWAYS], [
ZFS_AC_CONFIG_ALWAYS_CC_NO_FORMAT_ZERO_LENGTH
ZFS_AC_CONFIG_ALWAYS_CC_NO_OMIT_FRAME_POINTER
ZFS_AC_CONFIG_ALWAYS_CC_NO_IPA_SRA
ZFS_AC_CONFIG_ALWAYS_KERNEL_CC_NO_IPA_SRA
ZFS_AC_CONFIG_ALWAYS_CC_ASAN
ZFS_AC_CONFIG_ALWAYS_TOOLCHAIN_SIMD
ZFS_AC_CONFIG_ALWAYS_SYSTEM