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Use -Werror to check if the compiler supports specific options

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Be default, clang treats unknown warning option as warning.
We need to use -Werror to make it an error.

Reviewed-by: Brian Behlendorf <behlendorf1@llnl.gov>
Reviewed-by: Ryan Moeller <ryan@iXsystems.com>
Signed-off-by: 12101111 <w12101111@gmail.com>
Closes #9927
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韩朴宇 2020-02-05 00:47:38 +08:00 committed by GitHub
parent 8c4987c489
commit 52c487a0e4
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GPG Key ID: 4AEE18F83AFDEB23
1 changed files with 6 additions and 6 deletions
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12
config/always-compiler-options.m4
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@ -22,7 +22,7 @@ AC_DEFUN([ZFS_AC_CONFIG_ALWAYS_CC_ASAN], [
AS_IF([ test "$enable_asan" = "yes" ], [ AS_IF([ test "$enable_asan" = "yes" ], [
AC_MSG_CHECKING([whether $CC supports -fsanitize=address]) AC_MSG_CHECKING([whether $CC supports -fsanitize=address])
saved_cflags="$CFLAGS" saved_cflags="$CFLAGS"
CFLAGS="$CFLAGS -fsanitize=address" CFLAGS="$CFLAGS -Werror -fsanitize=address"
AC_LINK_IFELSE([ AC_LINK_IFELSE([
AC_LANG_SOURCE([[ int main() { return 0; } ]]) AC_LANG_SOURCE([[ int main() { return 0; } ]])
], [ ], [
@ -52,7 +52,7 @@ AC_DEFUN([ZFS_AC_CONFIG_ALWAYS_CC_FRAME_LARGER_THAN], [
AC_MSG_CHECKING([whether $CC supports -Wframe-larger-than=<size>]) AC_MSG_CHECKING([whether $CC supports -Wframe-larger-than=<size>])
saved_flags="$CFLAGS" saved_flags="$CFLAGS"
CFLAGS="$CFLAGS -Wframe-larger-than=4096" CFLAGS="$CFLAGS -Werror -Wframe-larger-than=4096"
AC_COMPILE_IFELSE([AC_LANG_PROGRAM([], [])], [ AC_COMPILE_IFELSE([AC_LANG_PROGRAM([], [])], [
FRAME_LARGER_THAN="-Wframe-larger-than=4096" FRAME_LARGER_THAN="-Wframe-larger-than=4096"
@ -73,7 +73,7 @@ AC_DEFUN([ZFS_AC_CONFIG_ALWAYS_CC_NO_FORMAT_TRUNCATION], [
AC_MSG_CHECKING([whether $CC supports -Wno-format-truncation]) AC_MSG_CHECKING([whether $CC supports -Wno-format-truncation])
saved_flags="$CFLAGS" saved_flags="$CFLAGS"
CFLAGS="$CFLAGS -Wno-format-truncation" CFLAGS="$CFLAGS -Werror -Wno-format-truncation"
AC_COMPILE_IFELSE([AC_LANG_PROGRAM([], [])], [ AC_COMPILE_IFELSE([AC_LANG_PROGRAM([], [])], [
NO_FORMAT_TRUNCATION=-Wno-format-truncation NO_FORMAT_TRUNCATION=-Wno-format-truncation
@ -100,7 +100,7 @@ AC_DEFUN([ZFS_AC_CONFIG_ALWAYS_CC_NO_BOOL_COMPARE], [
AC_MSG_CHECKING([whether $CC supports -Wno-bool-compare]) AC_MSG_CHECKING([whether $CC supports -Wno-bool-compare])
saved_flags="$CFLAGS" saved_flags="$CFLAGS"
CFLAGS="$CFLAGS -Wbool-compare" CFLAGS="$CFLAGS -Werror -Wbool-compare"
AC_COMPILE_IFELSE([AC_LANG_PROGRAM([], [])], [ AC_COMPILE_IFELSE([AC_LANG_PROGRAM([], [])], [
NO_BOOL_COMPARE=-Wno-bool-compare NO_BOOL_COMPARE=-Wno-bool-compare
@ -126,7 +126,7 @@ AC_DEFUN([ZFS_AC_CONFIG_ALWAYS_CC_NO_UNUSED_BUT_SET_VARIABLE], [
AC_MSG_CHECKING([whether $CC supports -Wno-unused-but-set-variable]) AC_MSG_CHECKING([whether $CC supports -Wno-unused-but-set-variable])
saved_flags="$CFLAGS" saved_flags="$CFLAGS"
CFLAGS="$CFLAGS -Wunused-but-set-variable" CFLAGS="$CFLAGS -Werror -Wunused-but-set-variable"
AC_COMPILE_IFELSE([AC_LANG_PROGRAM([], [])], [ AC_COMPILE_IFELSE([AC_LANG_PROGRAM([], [])], [
NO_UNUSED_BUT_SET_VARIABLE=-Wno-unused-but-set-variable NO_UNUSED_BUT_SET_VARIABLE=-Wno-unused-but-set-variable
@ -147,7 +147,7 @@ AC_DEFUN([ZFS_AC_CONFIG_ALWAYS_CC_NO_OMIT_FRAME_POINTER], [
AC_MSG_CHECKING([whether $CC supports -fno-omit-frame-pointer]) AC_MSG_CHECKING([whether $CC supports -fno-omit-frame-pointer])
saved_flags="$CFLAGS" saved_flags="$CFLAGS"
CFLAGS="$CFLAGS -fno-omit-frame-pointer" CFLAGS="$CFLAGS -Werror -fno-omit-frame-pointer"
AC_COMPILE_IFELSE([AC_LANG_PROGRAM([], [])], [ AC_COMPILE_IFELSE([AC_LANG_PROGRAM([], [])], [
NO_OMIT_FRAME_POINTER=-fno-omit-frame-pointer NO_OMIT_FRAME_POINTER=-fno-omit-frame-pointer