ObjFW  Check-in [2edae50b86]

Overview
Comment:Move ObjC feature checks to OFObject.h.

This way, it is theoretically possible to compile ObjFW with one
compiler and then use it with another.

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SHA3-256: 2edae50b86bc3dfc09d2b8bb99a40dca999b6ff7bed488bbff8202eb997fa47a
User & Date: js on 2012-10-03 15:47:15
Other Links: manifest | tags
Context
2012-10-05
09:54
Add -[OFDataArray description]. check-in: 23ad67cdf7 user: js tags: trunk
2012-10-03
15:47
Move ObjC feature checks to OFObject.h. check-in: 2edae50b86 user: js tags: trunk
15:41
Move definition of restricted to OFObject.h. check-in: 7239333455 user: js tags: trunk
Changes
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Modified configure.ac from [0c2ce536c1] to [cc4568e947].

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AX_CHECK_COMPILER_FLAGS(-Wshorten-64-to-32,
	[OBJCFLAGS="$OBJCFLAGS -Wshorten-64-to-32"])
AX_CHECK_COMPILER_FLAGS(-Wsemicolon-before-method-body,
	[OBJCFLAGS="$OBJCFLAGS -Wsemicolon-before-method-body"])
AX_CHECK_COMPILER_FLAGS(-Wno-objc-root-class,
	[OBJCFLAGS="$OBJCFLAGS -Wno-objc-root-class"])

AC_MSG_CHECKING(whether Objective C compiler supports fast enumeration)
AC_TRY_COMPILE([
	@protocol OFFastEnumeration
	- (int)countByEnumeratingWithState: (void*)state
				   objects: (id*)objects
				     count: (int)count;
	@end
], [
	id n = (id)0;
	for (id i in n);
], [
	AC_DEFINE(OF_HAVE_FAST_ENUMERATION, 1,
		[Compiler support for Fast Enumeration])
	AC_MSG_RESULT(yes)
], [
	AC_MSG_RESULT(no)
])

AC_MSG_CHECKING(whether Objective C compiler supports properties)
AC_TRY_COMPILE([
	@interface Foo
	{
		id bar;
	}

	@property (retain, nonatomic) id bar;
	@end
], [
	Foo *foo = (id)0;
	[foo setBar: (id)0];
	[foo bar];
], [
	AC_DEFINE(OF_HAVE_PROPERTIES, 1, [Compiler support for properties])
	AC_SUBST(PROPERTIESTESTS_M, "PropertiesTests.m")
	AC_MSG_RESULT(yes)
], [
	AC_MSG_RESULT(no)
])

AC_MSG_CHECKING(whether Objective C compiler supports optional protocols)
AC_TRY_COMPILE([
	@protocol Proto
	@optional
	+ (void)foo;
	@end

	@interface Foo <Proto>
	@end

	@implementation Foo
	@end
], [
	[Foo foo];
], [
	AC_DEFINE(OF_HAVE_OPTIONAL_PROTOCOLS, 1,
		[Compiler support for optional protocols])
	AC_MSG_RESULT(yes)
], [
	AC_MSG_RESULT(no)
])

AC_MSG_CHECKING(whether Objective C compiler supports blocks)
old_OBJCFLAGS="$OBJCFLAGS"
OBJCFLAGS="$OBJCFLAGS -fblocks"
AC_TRY_COMPILE([], [
	int (^foo)(int bar);
	foo = ^ (int bar) { return 0; }
], [
	AC_DEFINE(OF_HAVE_BLOCKS, 1, [Compiler support for blocks])
	AC_SUBST(BLOCKS_FLAGS, "-fblocks")
	AC_SUBST(OFBLOCKTESTS_M, "OFBlockTests.m")
	AC_MSG_RESULT(yes)
], [
	AC_MSG_RESULT(no)
	OBJCFLAGS="$old_OBJCFLAGS"
])
︙

Modified src/OFObject.h from [d0b36af00e] to [5242dae164].

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#elif __STDC_VERSION__ < 199901L
# define restrict
#endif

#ifndef __has_feature
# define __has_feature(x) 0
#endif

#if defined(__clang__)
# define OF_HAVE_PROPERTIES
# define OF_HAVE_OPTIONAL_PROTOCOLS
# define OF_HAVE_FAST_ENUMERATION
#elif defined(__GNUC__)
# if __GNUC__ > 4 || (__GNUC__ == 4 && __GNUC_MINOR__ >= 6)
#  define OF_HAVE_PROPERTIES
#  define OF_HAVE_OPTIONAL_PROTOCOLS
#  define OF_HAVE_FAST_ENUMERATION
# endif
#endif

#if __has_feature(blocks)
# define OF_HAVE_BLOCKS
#endif

#if __has_feature(objc_bool)
# undef YES
# define YES __objc_yes
# undef NO
# define NO __objc_no
#endif
︙

Modified src/objfw-defs.h.in from [13f2356be6] to [2392df0876]. 

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#undef OF_APPLE_RUNTIME
#undef OF_ATOMIC_OPS
#undef OF_BIG_ENDIAN
#undef OF_COMPILER_TLS
#undef OF_FLOAT_BIG_ENDIAN
#undef OF_HAVE_ASPRINTF
#undef OF_HAVE_BLOCKS
#undef OF_HAVE_FAST_ENUMERATION
#undef OF_HAVE_GCC_ATOMIC_OPS
#undef OF_HAVE_OPTIONAL_PROTOCOLS
#undef OF_HAVE_OSATOMIC
#undef OF_HAVE_OSATOMIC_64
#undef OF_HAVE_PROPERTIES
#undef OF_HAVE_PTHREADS
#undef OF_HAVE_PTHREAD_SPINLOCKS
#undef OF_HAVE_RECURSIVE_PTHREAD_MUTEXES
#undef OF_HAVE_SCHED_YIELD
#undef OF_HAVE_SYS_SELECT_H
#undef OF_OBJFW_RUNTIME
#undef OF_PLUGINS
#undef OF_THREADS
#undef SIZE_MAX

Fossil 2.23 [47362306a7] 2023-11-01 18:56:47
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