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build: adjust minimum version for some clang picky warnings

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Enable 3 warnings earlier with autotools, update comments for the rest.

Ref: https://godbolt.org/

Closes #20665
This commit is contained in:
Viktor Szakats 2026-02-21 23:48:18 +01:00
parent 139307865a
commit 25512ab34e
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2 changed files with 10 additions and 10 deletions
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6
m4/curl-compilers.m4
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@ -828,9 +828,11 @@ AC_DEFUN([CURL_SET_COMPILER_WARNING_OPTS], [
CURL_ADD_COMPILER_WARNINGS([tmp_CFLAGS], [address])
CURL_ADD_COMPILER_WARNINGS([tmp_CFLAGS], [attributes])
CURL_ADD_COMPILER_WARNINGS([tmp_CFLAGS], [bad-function-cast])
CURL_ADD_COMPILER_WARNINGS([tmp_CFLAGS], [cast-qual])
CURL_ADD_COMPILER_WARNINGS([tmp_CFLAGS], [conversion])
CURL_ADD_COMPILER_WARNINGS([tmp_CFLAGS], [div-by-zero format-security])
CURL_ADD_COMPILER_WARNINGS([tmp_CFLAGS], [empty-body])
tmp_CFLAGS="$tmp_CFLAGS -Wformat=2"
CURL_ADD_COMPILER_WARNINGS([tmp_CFLAGS], [missing-field-initializers])
CURL_ADD_COMPILER_WARNINGS([tmp_CFLAGS], [missing-noreturn])
tmp_CFLAGS="$tmp_CFLAGS -Wno-switch-default"
@ -853,16 +855,14 @@ AC_DEFUN([CURL_SET_COMPILER_WARNING_OPTS], [
if test "$compiler_num" -ge "209"; then
tmp_CFLAGS="$tmp_CFLAGS -Wno-sign-conversion"
tmp_CFLAGS="$tmp_CFLAGS -Wno-padded" # Not used because we cannot change public structs
tmp_CFLAGS="$tmp_CFLAGS -Wno-used-but-marked-unused" # Triggered by typecheck-gcc.h with clang 14+, dependency headers
CURL_ADD_COMPILER_WARNINGS([tmp_CFLAGS], [shift-sign-overflow])
fi
#
dnl Only clang 3.0 or later
if test "$compiler_num" -ge "300"; then
CURL_ADD_COMPILER_WARNINGS([tmp_CFLAGS], [cast-qual])
CURL_ADD_COMPILER_WARNINGS([tmp_CFLAGS], [conditional-uninitialized])
CURL_ADD_COMPILER_WARNINGS([tmp_CFLAGS], [language-extension-token])
tmp_CFLAGS="$tmp_CFLAGS -Wformat=2"
tmp_CFLAGS="$tmp_CFLAGS -Wno-used-but-marked-unused" # Triggered by typecheck-gcc.h with clang 14+, dependency headers
fi
dnl Only clang 3.1 or later
if test "$compiler_num" -ge "301"; then