ObjFW  Check-in [42a7135606]

Overview
Comment:Don't use -pedantic with buggy compilers
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SHA3-256: 42a7135606cc3bbf748bc0338e4fc910efc1563f2cf06a6ec40614e4ec7f6efc
User & Date: js on 2014-05-15 20:05:13
Other Links: manifest | tags
Context
2014-05-25
12:05
Update buildsys check-in: eeaa49c11a user: js tags: trunk
2014-05-15
20:05
Don't use -pedantic with buggy compilers check-in: 42a7135606 user: js tags: trunk
16:02
configure.ac: Fix a missing \ check-in: 893cefa092 user: js tags: trunk
Changes

Modified configure.ac from [962c9e928c] to [e7c52b7b2b].

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		OBJCFLAGS="$OBJCFLAGS -std=c1x"
	], [
		AX_CHECK_COMPILER_FLAGS(-std=c99,
			[OBJCFLAGS="$OBJCFLAGS -std=c99"])
	])
])

AX_CHECK_COMPILER_FLAGS(-pedantic, [OBJCFLAGS="$OBJCFLAGS -pedantic"])
AX_CHECK_COMPILER_FLAGS(-pipe, [OBJCFLAGS="$OBJCFLAGS -pipe"])
AX_CHECK_COMPILER_FLAGS(-fno-common, [OBJCFLAGS="$OBJCFLAGS -fno-common"])
AX_CHECK_COMPILER_FLAGS(-fno-constant-cfstrings, [
	OBJCFLAGS="$OBJCFLAGS -fno-constant-cfstrings"
	AC_SUBST(NO_CONST_CFSTRINGS, "-fno-constant-cfstrings")
])
AX_CHECK_COMPILER_FLAGS(-Wshorten-64-to-32 -Werror,







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		OBJCFLAGS="$OBJCFLAGS -std=c1x"
	], [
		AX_CHECK_COMPILER_FLAGS(-std=c99,
			[OBJCFLAGS="$OBJCFLAGS -std=c99"])
	])
])


AX_CHECK_COMPILER_FLAGS(-pipe, [OBJCFLAGS="$OBJCFLAGS -pipe"])
AX_CHECK_COMPILER_FLAGS(-fno-common, [OBJCFLAGS="$OBJCFLAGS -fno-common"])
AX_CHECK_COMPILER_FLAGS(-fno-constant-cfstrings, [
	OBJCFLAGS="$OBJCFLAGS -fno-constant-cfstrings"
	AC_SUBST(NO_CONST_CFSTRINGS, "-fno-constant-cfstrings")
])
AX_CHECK_COMPILER_FLAGS(-Wshorten-64-to-32 -Werror,
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	AC_TRY_LINK([#include <stdint.h>], [
		int32_t i, j;
		if (__sync_add_and_fetch(&i, 1))
			j = __sync_sub_and_fetch(&i, 1);
		while (!__sync_bool_compare_and_swap(&i, 0, 1));
	], [
		AC_MSG_RESULT(yes)
		atomic_ops="gcc builtins"
		AC_DEFINE(OF_HAVE_GCC_ATOMIC_OPS, 1,
			[Whether gcc atomic operations are available])
	], [
		AC_MSG_RESULT(no)
	])

	AC_MSG_CHECKING(whether we have an atomic ops assembly implementation)
	AC_EGREP_CPP(yes, [
		#if defined(__GNUC__) && (defined(__i386__) || \







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	AC_TRY_LINK([#include <stdint.h>], [
		int32_t i, j;
		if (__sync_add_and_fetch(&i, 1))
			j = __sync_sub_and_fetch(&i, 1);
		while (!__sync_bool_compare_and_swap(&i, 0, 1));
	], [
		AC_MSG_RESULT(yes)
		atomic_ops="GCC builtins"
		AC_DEFINE(OF_HAVE_GCC_ATOMIC_OPS, 1,
			[Whether GCC atomic operations are available])
	], [
		AC_MSG_RESULT(no)
	])

	AC_MSG_CHECKING(whether we have an atomic ops assembly implementation)
	AC_EGREP_CPP(yes, [
		#if defined(__GNUC__) && (defined(__i386__) || \
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		AC_DEFINE(OF_IOS, 1, [Whether we compile for iOS])
		;;
esac

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

	AC_MSG_CHECKING(whether we have gcc bug objc/27438)
	AC_TRY_COMPILE([
		@interface OFConstantString
		{
			struct objc_class *isa;
			const char *string;
			unsigned long size;
		}







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		AC_DEFINE(OF_IOS, 1, [Whether we compile for iOS])
		;;
esac

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

	AC_MSG_CHECKING(whether we have GCC bug objc/27438)
	AC_TRY_COMPILE([
		@interface OFConstantString
		{
			struct objc_class *isa;
			const char *string;
			unsigned long size;
		}
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		AC_MSG_RESULT(no)
	], [
		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








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		AC_MSG_RESULT(no)
	], [
		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

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	], [
	], [
		AC_MSG_RESULT(yes)
	], [
		AC_MSG_RESULT(no)
		OBJCFLAGS="$old_OBJCFLAGS"
	])


























])

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

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







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	], [
	], [
		AC_MSG_RESULT(yes)
	], [
		AC_MSG_RESULT(no)
		OBJCFLAGS="$old_OBJCFLAGS"
	])

	old_OBJCFLAGS="$OBJCFLAGS"
	OBJCFLAGS="$OBJCFLAGS -pedantic"
	AC_MSG_CHECKING(whether -pedantic is buggy)
	AC_TRY_COMPILE([
		#import <stdlib.h>

		#ifdef __has_attribute
		# if __has_attribute(objc_root_class)
		__attribute__((__objc_root_class__))
		# endif
		#endif
		@interface Foo
		{
			void *foo;
		}
		@end

		@interface Bar: Foo
		@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_alias}-")

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