ObjSQLite3  Check-in [7237f5df86]

AS_IF([test x"$GOBJC" = x"yes"], [
	OBJCFLAGS="$OBJCFLAGS -Wall -Werror -Wwrite-strings -Wpointer-arith"

	old_OBJCFLAGS="$OBJCFLAGS"
	OBJCFLAGS="$OBJCFLAGS -Wcast-align"
	AC_MSG_CHECKING(whether -Wcast-align is buggy)
	AC_TRY_COMPILE([
		#ifdef __has_attribute
		# if __has_attribute(objc_root_class)
		__attribute__((__objc_root_class__))
		# endif
		#endif
		@interface Foo
		{
			struct objc_class *_isa;
		}
		@end
	AC_COMPILE_IFELSE([
		AC_LANG_SOURCE([
			#ifdef __has_attribute
			# if __has_attribute(objc_root_class)
			__attribute__((__objc_root_class__))
			# endif
			#endif
			@interface Foo
			{
				struct objc_class *_isa;
			}
			@end

		@implementation Foo
		- (void)foo
		{
			struct objc_class *c = _isa;
			(void)c;
		}
		@end
	], [
			@implementation Foo
			- (void)foo
			{
				struct objc_class *c = _isa;
				(void)c;
			}
			@end
		])
	], [
		AC_MSG_RESULT(no)
	], [
		AC_MSG_RESULT(yes)
		OBJCFLAGS="$old_OBJCFLAGS"
	])
])