Obtained from:	https://github.com/derickr/vld/commit/d7abb0c5ebda8277cda4be37a92d55e29ab5b503

--- config.m4.orig	2022-09-16 08:00:47 UTC
+++ config.m4
@@ -20,42 +20,42 @@ if test "$PHP_VLD" != "no"; then
   CPPFLAGS=$old_CPPFLAGS
 
   if test "$PHP_VLD_DEV" = "yes"; then
-    PHP_CHECK_GCC_ARG(-Wbool-conversion,                _MAINTAINER_CFLAGS="$_MAINTAINER_CFLAGS -Wbool-conversion")
-    PHP_CHECK_GCC_ARG(-Wdeclaration-after-statement,    _MAINTAINER_CFLAGS="$_MAINTAINER_CFLAGS -Wdeclaration-after-statement")
-    PHP_CHECK_GCC_ARG(-Wdiscarded-qualifiers,           _MAINTAINER_CFLAGS="$_MAINTAINER_CFLAGS -Wdiscarded-qualifiers")
-    PHP_CHECK_GCC_ARG(-Wduplicate-enum,                 _MAINTAINER_CFLAGS="$_MAINTAINER_CFLAGS -Wduplicate-enum")
-    PHP_CHECK_GCC_ARG(-Wempty-body,                     _MAINTAINER_CFLAGS="$_MAINTAINER_CFLAGS -Wempty-body")
-    PHP_CHECK_GCC_ARG(-Wenum-compare,                   _MAINTAINER_CFLAGS="$_MAINTAINER_CFLAGS -Wenum-compare")
-    PHP_CHECK_GCC_ARG(-Werror,                          _MAINTAINER_CFLAGS="$_MAINTAINER_CFLAGS -Werror")
-    PHP_CHECK_GCC_ARG(-Wextra,                          _MAINTAINER_CFLAGS="$_MAINTAINER_CFLAGS -Wextra")
-    PHP_CHECK_GCC_ARG(-Wformat-nonliteral,              _MAINTAINER_CFLAGS="$_MAINTAINER_CFLAGS -Wformat-nonliteral")
-    PHP_CHECK_GCC_ARG(-Wformat-security,                _MAINTAINER_CFLAGS="$_MAINTAINER_CFLAGS -Wformat-security")
-    PHP_CHECK_GCC_ARG(-Wheader-guard,                   _MAINTAINER_CFLAGS="$_MAINTAINER_CFLAGS -Wheader-guard")
-    PHP_CHECK_GCC_ARG(-Wincompatible-pointer-types-discards-qualifiers, _MAINTAINER_CFLAGS="$_MAINTAINER_CFLAGS -Wincompatible-pointer-types-discards-qualifiers")
-    PHP_CHECK_GCC_ARG(-Wimplicit-fallthrough,           _MAINTAINER_CFLAGS="$_MAINTAINER_CFLAGS -Wimplicit-fallthrough")
-    PHP_CHECK_GCC_ARG(-Winit-self,                      _MAINTAINER_CFLAGS="$_MAINTAINER_CFLAGS -Winit-self")
-    PHP_CHECK_GCC_ARG(-Wlogical-not-parentheses,        _MAINTAINER_CFLAGS="$_MAINTAINER_CFLAGS -Wlogical-not-parentheses")
-    PHP_CHECK_GCC_ARG(-Wlogical-op,                     _MAINTAINER_CFLAGS="$_MAINTAINER_CFLAGS -Wlogical-op")
-    PHP_CHECK_GCC_ARG(-Wlogical-op-parentheses,         _MAINTAINER_CFLAGS="$_MAINTAINER_CFLAGS -Wlogical-op-parentheses")
-    PHP_CHECK_GCC_ARG(-Wloop-analysis,                  _MAINTAINER_CFLAGS="$_MAINTAINER_CFLAGS -Wloop-analysis")
-    PHP_CHECK_GCC_ARG(-Wmaybe-uninitialized,            _MAINTAINER_CFLAGS="$_MAINTAINER_CFLAGS -Wmaybe-uninitialized")
-    PHP_CHECK_GCC_ARG(-Wmissing-format-attribute,       _MAINTAINER_CFLAGS="$_MAINTAINER_CFLAGS -Wmissing-format-attribute")
-    PHP_CHECK_GCC_ARG(-Wno-missing-field-initializers,  _MAINTAINER_CFLAGS="$_MAINTAINER_CFLAGS -Wno-missing-field-initializers")
-    PHP_CHECK_GCC_ARG(-Wno-sign-compare,                _MAINTAINER_CFLAGS="$_MAINTAINER_CFLAGS -Wno-sign-compare")
-    PHP_CHECK_GCC_ARG(-Wno-unused-but-set-variable,     _MAINTAINER_CFLAGS="$_MAINTAINER_CFLAGS -Wno-unused-but-set-variable")
-    PHP_CHECK_GCC_ARG(-Wno-unused-parameter,            _MAINTAINER_CFLAGS="$_MAINTAINER_CFLAGS -Wno-unused-parameter")
-    PHP_CHECK_GCC_ARG(-Wno-variadic-macros,             _MAINTAINER_CFLAGS="$_MAINTAINER_CFLAGS -Wno-variadic-macros")
-    PHP_CHECK_GCC_ARG(-Wparentheses,                    _MAINTAINER_CFLAGS="$_MAINTAINER_CFLAGS -Wparentheses")
-    PHP_CHECK_GCC_ARG(-Wpointer-bool-conversion,        _MAINTAINER_CFLAGS="$_MAINTAINER_CFLAGS -Wpointer-bool-conversion")
-    PHP_CHECK_GCC_ARG(-Wsizeof-array-argument,          _MAINTAINER_CFLAGS="$_MAINTAINER_CFLAGS -Wsizeof-array-argument")
-    PHP_CHECK_GCC_ARG(-Wstring-conversion,              _MAINTAINER_CFLAGS="$_MAINTAINER_CFLAGS -Wstring-conversion")
-    PHP_CHECK_GCC_ARG(-Wwrite-strings,                  _MAINTAINER_CFLAGS="$_MAINTAINER_CFLAGS -Wwrite-strings")
-    PHP_CHECK_GCC_ARG(-fdiagnostics-show-option,        _MAINTAINER_CFLAGS="$_MAINTAINER_CFLAGS -fdiagnostics-show-option")
-    PHP_CHECK_GCC_ARG(-fno-exceptions,                  _MAINTAINER_CFLAGS="$_MAINTAINER_CFLAGS -fno-exceptions")
-    PHP_CHECK_GCC_ARG(-fno-omit-frame-pointer,          _MAINTAINER_CFLAGS="$_MAINTAINER_CFLAGS -fno-omit-frame-pointer")
-    PHP_CHECK_GCC_ARG(-fno-optimize-sibling-calls,      _MAINTAINER_CFLAGS="$_MAINTAINER_CFLAGS -fno-optimize-sibling-calls")
-    PHP_CHECK_GCC_ARG(-fsanitize-address,               _MAINTAINER_CFLAGS="$_MAINTAINER_CFLAGS -fsanitize-address")
-    PHP_CHECK_GCC_ARG(-fstack-protector,                _MAINTAINER_CFLAGS="$_MAINTAINER_CFLAGS -fstack-protector")
+    AX_CHECK_COMPILE_FLAG(-Wbool-conversion,                _MAINTAINER_CFLAGS="$_MAINTAINER_CFLAGS -Wbool-conversion")
+    AX_CHECK_COMPILE_FLAG(-Wdeclaration-after-statement,    _MAINTAINER_CFLAGS="$_MAINTAINER_CFLAGS -Wdeclaration-after-statement")
+    AX_CHECK_COMPILE_FLAG(-Wdiscarded-qualifiers,           _MAINTAINER_CFLAGS="$_MAINTAINER_CFLAGS -Wdiscarded-qualifiers")
+    AX_CHECK_COMPILE_FLAG(-Wduplicate-enum,                 _MAINTAINER_CFLAGS="$_MAINTAINER_CFLAGS -Wduplicate-enum")
+    AX_CHECK_COMPILE_FLAG(-Wempty-body,                     _MAINTAINER_CFLAGS="$_MAINTAINER_CFLAGS -Wempty-body")
+    AX_CHECK_COMPILE_FLAG(-Wenum-compare,                   _MAINTAINER_CFLAGS="$_MAINTAINER_CFLAGS -Wenum-compare")
+    AX_CHECK_COMPILE_FLAG(-Werror,                          _MAINTAINER_CFLAGS="$_MAINTAINER_CFLAGS -Werror")
+    AX_CHECK_COMPILE_FLAG(-Wextra,                          _MAINTAINER_CFLAGS="$_MAINTAINER_CFLAGS -Wextra")
+    AX_CHECK_COMPILE_FLAG(-Wformat-nonliteral,              _MAINTAINER_CFLAGS="$_MAINTAINER_CFLAGS -Wformat-nonliteral")
+    AX_CHECK_COMPILE_FLAG(-Wformat-security,                _MAINTAINER_CFLAGS="$_MAINTAINER_CFLAGS -Wformat-security")
+    AX_CHECK_COMPILE_FLAG(-Wheader-guard,                   _MAINTAINER_CFLAGS="$_MAINTAINER_CFLAGS -Wheader-guard")
+    AX_CHECK_COMPILE_FLAG(-Wincompatible-pointer-types-discards-qualifiers, _MAINTAINER_CFLAGS="$_MAINTAINER_CFLAGS -Wincompatible-pointer-types-discards-qualifiers")
+    AX_CHECK_COMPILE_FLAG(-Wimplicit-fallthrough,           _MAINTAINER_CFLAGS="$_MAINTAINER_CFLAGS -Wimplicit-fallthrough")
+    AX_CHECK_COMPILE_FLAG(-Winit-self,                      _MAINTAINER_CFLAGS="$_MAINTAINER_CFLAGS -Winit-self")
+    AX_CHECK_COMPILE_FLAG(-Wlogical-not-parentheses,        _MAINTAINER_CFLAGS="$_MAINTAINER_CFLAGS -Wlogical-not-parentheses")
+    AX_CHECK_COMPILE_FLAG(-Wlogical-op,                     _MAINTAINER_CFLAGS="$_MAINTAINER_CFLAGS -Wlogical-op")
+    AX_CHECK_COMPILE_FLAG(-Wlogical-op-parentheses,         _MAINTAINER_CFLAGS="$_MAINTAINER_CFLAGS -Wlogical-op-parentheses")
+    AX_CHECK_COMPILE_FLAG(-Wloop-analysis,                  _MAINTAINER_CFLAGS="$_MAINTAINER_CFLAGS -Wloop-analysis")
+    AX_CHECK_COMPILE_FLAG(-Wmaybe-uninitialized,            _MAINTAINER_CFLAGS="$_MAINTAINER_CFLAGS -Wmaybe-uninitialized")
+    AX_CHECK_COMPILE_FLAG(-Wmissing-format-attribute,       _MAINTAINER_CFLAGS="$_MAINTAINER_CFLAGS -Wmissing-format-attribute")
+    AX_CHECK_COMPILE_FLAG(-Wno-missing-field-initializers,  _MAINTAINER_CFLAGS="$_MAINTAINER_CFLAGS -Wno-missing-field-initializers")
+    AX_CHECK_COMPILE_FLAG(-Wno-sign-compare,                _MAINTAINER_CFLAGS="$_MAINTAINER_CFLAGS -Wno-sign-compare")
+    AX_CHECK_COMPILE_FLAG(-Wno-unused-but-set-variable,     _MAINTAINER_CFLAGS="$_MAINTAINER_CFLAGS -Wno-unused-but-set-variable")
+    AX_CHECK_COMPILE_FLAG(-Wno-unused-parameter,            _MAINTAINER_CFLAGS="$_MAINTAINER_CFLAGS -Wno-unused-parameter")
+    AX_CHECK_COMPILE_FLAG(-Wno-variadic-macros,             _MAINTAINER_CFLAGS="$_MAINTAINER_CFLAGS -Wno-variadic-macros")
+    AX_CHECK_COMPILE_FLAG(-Wparentheses,                    _MAINTAINER_CFLAGS="$_MAINTAINER_CFLAGS -Wparentheses")
+    AX_CHECK_COMPILE_FLAG(-Wpointer-bool-conversion,        _MAINTAINER_CFLAGS="$_MAINTAINER_CFLAGS -Wpointer-bool-conversion")
+    AX_CHECK_COMPILE_FLAG(-Wsizeof-array-argument,          _MAINTAINER_CFLAGS="$_MAINTAINER_CFLAGS -Wsizeof-array-argument")
+    AX_CHECK_COMPILE_FLAG(-Wstring-conversion,              _MAINTAINER_CFLAGS="$_MAINTAINER_CFLAGS -Wstring-conversion")
+    AX_CHECK_COMPILE_FLAG(-Wwrite-strings,                  _MAINTAINER_CFLAGS="$_MAINTAINER_CFLAGS -Wwrite-strings")
+    AX_CHECK_COMPILE_FLAG(-fdiagnostics-show-option,        _MAINTAINER_CFLAGS="$_MAINTAINER_CFLAGS -fdiagnostics-show-option")
+    AX_CHECK_COMPILE_FLAG(-fno-exceptions,                  _MAINTAINER_CFLAGS="$_MAINTAINER_CFLAGS -fno-exceptions")
+    AX_CHECK_COMPILE_FLAG(-fno-omit-frame-pointer,          _MAINTAINER_CFLAGS="$_MAINTAINER_CFLAGS -fno-omit-frame-pointer")
+    AX_CHECK_COMPILE_FLAG(-fno-optimize-sibling-calls,      _MAINTAINER_CFLAGS="$_MAINTAINER_CFLAGS -fno-optimize-sibling-calls")
+    AX_CHECK_COMPILE_FLAG(-fsanitize-address,               _MAINTAINER_CFLAGS="$_MAINTAINER_CFLAGS -fsanitize-address")
+    AX_CHECK_COMPILE_FLAG(-fstack-protector,                _MAINTAINER_CFLAGS="$_MAINTAINER_CFLAGS -fstack-protector")
 
     MAINTAINER_CFLAGS="$_MAINTAINER_CFLAGS"
     STD_CFLAGS="-g -O0 -Wall"