ObjFW  Check-in [05b17b8de4]

Overview
Comment:Check for buggy -Wcast-align.
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SHA3-256: 05b17b8de4b4062e8fd603258ea85445b26507d7b0840a79eaf1b2d802d041d8
User & Date: js on 2011-06-26 00:59:33
Other Links: manifest | tags
Context
2011-06-26
12:48
Add methods to read/write arrays with correct byte ordering to OFStream. check-in: 1ccbecd52a user: js tags: trunk
00:59
Check for buggy -Wcast-align. check-in: 05b17b8de4 user: js tags: trunk
00:45
Handle q length modifier in of_asprintf on iOS. check-in: 58f7af5290 user: js tags: trunk
Changes
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Modified configure.ac from [fd2d4b283c] to [e79d5faa30].

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AS_IF([test x"$objc_runtime" = x"Apple"], [
	AC_CHECK_HEADER(Foundation/NSObject.h, [
		AC_SUBST(FOUNDATION_COMPAT_M, "foundation-compat.m")
	])
])

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

	AC_MSG_CHECKING(whether gcc has bug objc/27438)
	AC_TRY_COMPILE([
		@interface OFConstantString
		{
			struct objc_class *isa;
			const char *string;








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AS_IF([test x"$objc_runtime" = x"Apple"], [
	AC_CHECK_HEADER(Foundation/NSObject.h, [
		AC_SUBST(FOUNDATION_COMPAT_M, "foundation-compat.m")
	])
])

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


	AC_MSG_CHECKING(whether gcc has bug objc/27438)
	AC_TRY_COMPILE([
		@interface OFConstantString
		{
			struct objc_class *isa;
			const char *string;
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		AC_MSG_RESULT([yes, adding -Wno-unused-variable])
		OBJCFLAGS="$OBJCFLAGS -Wno-unused-variable"
		AC_SUBST(NO_WARN_UNUSED, "-Wno-unused-variable")
	])

	AC_MSG_CHECKING(whether we need -Wno-strict-aliasing due to gcc bugs)
	AC_TRY_COMPILE([
		@interface OFObject
		{
			Class isa;
		}
		@end

		static struct {
			struct objc_class *isa;
		} object;
	], [
		OFObject *test = (OFObject*)&object;
		(void)test; /* Get rid of unused variable warning */
	], [
		AC_MSG_RESULT(no)
	], [
		AC_MSG_RESULT(yes)
		OBJCFLAGS="$OBJCFLAGS -Wno-strict-aliasing"
	])

























])

AS_IF([test x"$cross_compiling" = x"yes"], [
	AC_SUBST(BIN_PREFIX, "$host-")

	case "$host" in
		*-*-mingw*)








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		AC_MSG_RESULT([yes, adding -Wno-unused-variable])
		OBJCFLAGS="$OBJCFLAGS -Wno-unused-variable"
		AC_SUBST(NO_WARN_UNUSED, "-Wno-unused-variable")
	])

	AC_MSG_CHECKING(whether we need -Wno-strict-aliasing due to gcc bugs)
	AC_TRY_COMPILE([
		@interface Foo
		{
			struct objc_class *isa;
		}
		@end

		static struct {
			struct objc_class *isa;
		} object;
	], [
		Foo *test = (Foo*)&object;
		(void)test; /* Get rid of unused variable warning */
	], [
		AC_MSG_RESULT(no)
	], [
		AC_MSG_RESULT(yes)
		OBJCFLAGS="$OBJCFLAGS -Wno-strict-aliasing"
	])

	old_OBJCFLAGS="$OBJCFLAGS"
	OBJCFLAGS="$OBJCFLAGS -Wcast-align"
	AC_MSG_CHECKING(whether -Wcast-align is buggy)
	AC_TRY_COMPILE([
		@interface Foo
		{
			struct objc_class *isa;
		}
		@end

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

AS_IF([test x"$cross_compiling" = x"yes"], [
	AC_SUBST(BIN_PREFIX, "$host-")

	case "$host" in
		*-*-mingw*)
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