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configure: Make check for accepting warnings stricter

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Clang by default allows unknown warnings and merely emits
a Wunknown-warning-option warning which is non-fatal by default,
making it appear as if Clang supported any warning. This patch
rewrites the tests to always add the arguments to error out
in case an unrecognized option is encountered.

Signed-off-by: Andreas Rheinhardt <andreas.rheinhardt@outlook.com>
This commit is contained in:
Andreas Rheinhardt
2026-01-05 18:54:42 +01:00
parent 05098eef42
commit 005510501e
1 changed files with 32 additions and 21 deletions
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53
configure vendored
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@@ -7829,31 +7829,42 @@ for lang in c cxx objc; do
append unknown_warning_${lang}flags "-Werror=unknown-warning-option"
done
# add some useful compiler flags if supported
check_allcflags -Wall
check_allcflags -Wdisabled-optimization
check_allcflags -Wpointer-arith
check_allcflags -Wredundant-decls
check_allcflags -Wwrite-strings
check_allcflags -Wtype-limits
check_allcflags -Wundef
check_allcflags -Wempty-body
check_cflags -Wmissing-prototypes
check_cflags -Wstrict-prototypes
if enabled extra_warnings; then
check_allcflags -Wcast-qual
check_allcflags -Wextra
check_allcflags -Wpedantic
fi
check_warning(){
warning_flag=$1
flag_to_add=${2:-$1}
test_cflags $unknown_warning_cflags $warning_flag && add_cflags $flag_to_add
test_cxxflags -Werror $unknown_warning_cxxflags $warning_flag && add_cxxflags $flag_to_add
test_objcflags $unknown_warning_objcflags $warning_flag && add_objcflags $flag_to_add
}
check_disable_warning(){
warning_flag=-W${1#-Wno-}
test_cflags $unknown_warning_cflags $warning_flag && add_cflags $1
test_cxxflags -Werror $unknown_warning_cxxflags $warning_flag && add_cxxflags $1
test_objcflags $unknown_warning_objcflags $warning_flag && add_objcflags $1
check_warning $warning_flag $1
}
check_c_warning(){
warning_flag=$1
test_cflags $unknown_warning_cflags $warning_flag && add_cflags $warning_flag
}
# add some useful compiler flags if supported
check_warning -Wall
check_warning -Wdisabled-optimization
check_warning -Wpointer-arith
check_warning -Wredundant-decls
check_warning -Wwrite-strings
check_warning -Wtype-limits
check_warning -Wundef
check_warning -Wempty-body
check_c_warning -Wmissing-prototypes
check_c_warning -Wstrict-prototypes
if enabled extra_warnings; then
check_warning -Wcast-qual
check_warning -Wextra
check_warning -Wpedantic
fi
check_disable_warning -Wno-parentheses
check_disable_warning -Wno-switch
check_disable_warning -Wno-format-zero-length
@@ -7866,7 +7877,7 @@ check_disable_warning -Wno-microsoft-enum-forward-reference
check_disable_warning_headers(){
warning_flag=-W${1#-Wno-}
test_cflags $warning_flag && add_cflags_headers $1
test_cflags $unknown_warning_cflags $warning_flag && add_cflags_headers $1
}
check_disable_warning_headers -Wno-deprecated-declarations