ObjFW  Artifact [18c25283af]

Artifact 18c25283afd55b3feeda78cd44fb4d2d0832bfbd136e4d49e48fd8bdde773e3c:

• File configure.ac — part of check-in [3d0a1604ae] at 2011-02-02 22:26:45 on branch trunk — Increase blocks compatibility by replacing NSAutoreleasePool.

  NSAutoreleasePool is replaced by OFAutoreleasePool now so that there is
  no conflict because OFBlocks are used (blocks are OFBlocks as soon as
  ObjFW is linked). An application expecting an NSBlock, but getting an
  OFBlock because ObjFW is linked, would fail to autorelease the block
  otherwise, as the block would be in an OFAutoreleasePool. By replacing
  NSAutoreleasePool with OFAutoreleasePool, the application will still
  properly free the autoreleased block.

  This will also make it easier to write applications using both,
  Foundation and ObjFW, since the developer does not need to take care
  about two different autorelease pools, but they are united instead. (user: js, size: 12255) [annotate] [blame] [check-ins using]

AC_INIT(ObjFW, 0.4-dev, js@webkeks.org)
AC_CONFIG_SRCDIR(src)

AC_CANONICAL_HOST

AC_LANG([Objective C])
AC_PROG_OBJC
AC_PROG_OBJCPP
AC_PROG_LN_S
AC_PROG_INSTALL
AC_PROG_EGREP

CPP="$OBJCPP"
CPPFLAGS="$CPPFLAGS $OBJCPPFLAGS"
OBJCFLAGS="$OBJCFLAGS -Wall -fexceptions -fobjc-exceptions"
OBJCFLAGS="$OBJCFLAGS -fconstant-string-class=OFConstantString"

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, [
	NO_CONST_CFSTRINGS="-fno-constant-cfstrings"
	OBJCFLAGS="$OBJCFLAGS -fno-constant-cfstrings"
])
AC_SUBST(NO_CONST_CFSTRINGS)

AC_MSG_CHECKING(whether Objective C compiler supports fast enumeration)
AC_TRY_COMPILE([
	#import <objc/objc.h>

	@protocol OFFastEnumeration
	- (int)countByEnumeratingWithState: (void*)state
				   objects: (id*)objects
				     count: (int)count;
	@end
], [
	id n = nil;
	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([
	#import <objc/objc.h>

	@interface Foo
	{
		id bar;
	}

	@property (retain, nonatomic) id bar;
	@end
], [
	Foo *foo = nil;
	[foo setBar: nil];
	[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 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"
])

AC_CHECK_HEADERS([objfw-rt.h objc/objc.h])

test x"$ac_cv_header_objfw_rt_h" = x"yes" && objc_runtime="ObjFW-RT"

AS_IF([test x"$ac_cv_header_objc_objc_h" = x"yes"], [
	AC_EGREP_CPP(yes, [
		#import <objc/objc.h>
		#ifdef __GNU_LIBOBJC__
		yes
		#endif
	], [
		test x"$objc_runtime" = "x" && objc_runtime="GNU"
	], [
		dnl TODO: This is ugly. Let's think of a better check.
		AC_EGREP_CPP(yes, [
			#import <objc/objc.h>
			#ifdef __objc_INCLUDE_GNU
			yes
			#endif
		], [
			test x"$objc_runtime" = "x" && objc_runtime="old GNU"
		], [
			objc_runtime="Apple"
		])
	])
])

AC_MSG_CHECKING(which Objective C runtime we use)
case $objc_runtime in
	ObjFW-RT)
		AC_DEFINE(OF_OBJFW_RUNTIME, 1,
			[Whether we use the ObjFW runtime])
		AC_SUBST(GNU_RUNTIME, "-fgnu-runtime")
		OBJCFLAGS="$OBJCFLAGS -fgnu-runtime"
		LIBS="$LIBS -lobjfw-rt"
		;;
	Apple)
		AC_DEFINE(OF_APPLE_RUNTIME, 1,
			[Whether we use the Apple ObjC runtime])
		LIBS="$LIBS -lobjc"
		;;
	GNU)
		AC_DEFINE(OF_GNU_RUNTIME, 1,
			[Whether we use the GNU ObjC runtime])
		LIBS="$LIBS -lobjc"
		;;
	"old GNU")
		AC_DEFINE(OF_OLD_GNU_RUNTIME, 1,
			[Whether we use the old GNU ObjC runtime])
		LIBS="$LIBS -lobjc"
		;;
	*)
		AC_MSG_RESULT(none)
		AC_MSG_ERROR(No ObjC runtime found! Please install ObjFW-RT!)
		;;
esac
AC_MSG_RESULT($objc_runtime)

AC_CHECK_FUNC(objc_getProperty,, [
	AC_DEFINE(NEED_OBJC_PROPERTIES_INIT, 1,
		[Whether objc_properties_init needs to be called])
	AC_SUBST(OBJC_PROPERTIES_M, "objc_properties.m")
])

AC_CHECK_FUNC(objc_enumerationMutation, [
	AC_DEFINE(HAVE_OBJC_ENUMERATIONMUTATION, 1,
		[Whether we have objc_enumerationMutation])
])

AC_ARG_ENABLE(shared,
	AS_HELP_STRING([--disable-shared], [don't build shared library]))
AS_IF([test x"$enable_shared" != x"no"], [
	BUILDSYS_SHARED_LIB
	AC_SUBST(OBJFW_SHARED_LIB, "${LIB_PREFIX}objfw${LIB_SUFFIX}")
])
AC_ARG_ENABLE(static, AS_HELP_STRING([--enable-static], [build static library]))
AS_IF([test x"$enable_static" = x"yes" -o x"$enable_shared" = x"no"], [
	AC_REQUIRE([AC_PROG_RANLIB])
	AC_PATH_TOOL(AR, ar)
	AC_SUBST(OBJFW_STATIC_LIB, "libobjfw.a")
])

AC_DEFINE_UNQUOTED(PLUGIN_SUFFIX, "$PLUGIN_SUFFIX", [Suffix for plugins])
AS_IF([test x"$PLUGIN_SUFFIX" != "x"], [
	AC_SUBST(OFPLUGIN_M, "OFPlugin.m")
	AC_SUBST(OFPLUGINTESTS_M, "OFPluginTests.m")
	AC_SUBST(TESTPLUGIN, "plugin")
	AC_DEFINE(OF_PLUGINS, 1, [Whether we have plugin support])
	AC_SUBST(OFPLUGINS_DEF, "-DOF_PLUGINS")
])

case "$host_os" in
	darwin*)
		AC_SUBST(REEXPORT_LIBOBJC, [-Wl,-reexport-lobjc])
		AC_SUBST(LDFLAGS_REEXPORT, [-Wl,-reexport-lobjfw])
		AC_SUBST(MACH_ALIAS_LIST, [-Wl,-alias_list,mach_alias_list])
		;;
esac

AC_C_BIGENDIAN([
	AC_DEFINE(OF_BIG_ENDIAN, 1, [Whether we are big endian])
	AC_SUBST(ENDIANESS_DEF, "-DOF_BIG_ENDIAN")
])

AC_MSG_CHECKING(for SIZE_MAX)
AC_EGREP_CPP(yes, [
	#include <stdint.h>
	#include <limits.h>

	#ifdef SIZE_MAX
	yes
	#endif
], [
	AC_MSG_RESULT(yes)
], [
	AC_MSG_RESULT(no)
	AC_MSG_CHECKING(for SIZE_T_MAX)
	AC_EGREP_CPP(yes, [
		#include <stdint.h>
		#include <limits.h>

		#ifdef SIZE_T_MAX
		yes
		#endif
	], [
		AC_MSG_RESULT(yes)
		size_max="SIZE_T_MAX"], [
		AC_MSG_RESULT(no)
		size_max="(~(size_t)0)"
	])
	AC_DEFINE_UNQUOTED(SIZE_MAX, $size_max, [Maximum value for size_t])
])

AC_CHECK_FUNC(asprintf, [
	have_asprintf="yes"
	AC_DEFINE(OF_HAVE_ASPRINTF, 1, [Whether we have asprintf])
	AC_SUBST(ASPRINTF_DEF, "-DOF_HAVE_ASPRINTF")
], [
	have_asprintf="no"
	AC_SUBST(ASPRINTF_M, "asprintf.m")

	AC_MSG_CHECKING(whether snprintf returns something useful)
	AC_CACHE_VAL(ac_cv_snprintf_useful_ret, [
		AC_TRY_RUN([
			#include <stdio.h>

			int
			main()
			{
				return (snprintf(NULL, 0, "asd") == 3 ? 0 : 1);
			}
		], [
			ac_cv_snprintf_useful_ret="yes"
		], [
			ac_cv_snprintf_useful_ret="no"
		], [
			ac_cv_snprintf_useful_ret="no"
		])
	])
	AC_MSG_RESULT($ac_cv_snprintf_useful_ret)
])
test x"$have_asprintf" != x"yes" -a x"$ac_cv_snprintf_useful_ret" != x"yes" && \
	AC_MSG_ERROR(No asprintf and no snprintf returning required space!)

AC_CHECK_LIB(m, fmod, LIBS="$LIBS -lm")
AC_CHECK_LIB(dl, dlopen, LIBS="$LIBS -ldl")

AC_ARG_ENABLE(threads,
	AS_HELP_STRING([--disable-threads], [disable thread support]))
AS_IF([test x"$enable_threads" != x"no"], [
	case "$host_os" in
	mingw*)
		AC_MSG_CHECKING(for threads)
		AC_MSG_RESULT(WinAPI)
		;;
	*)
		ACX_PTHREAD([
			CPPLAGS="$CPPFLAGS $PTHREAD_CFLAGS"
			LIBS="$LIBS $PTHREAD_LIBS"
			AC_DEFINE(OF_HAVE_PTHREADS, 1,
				[Whether we have pthreads])
			AC_CHECK_FUNC(pthread_spin_lock, [
				AC_DEFINE(OF_HAVE_PTHREAD_SPINLOCKS, 1,
					[Whether we have pthread spinlocks])
			])
			AC_CHECK_FUNC(sched_yield, [
				AC_DEFINE(OF_HAVE_SCHED_YIELD, 1,
					[Whether we have sched_yield])
			])
		], [
			AC_MSG_ERROR(No supported threads found!)
		])
		;;
	esac

	AC_DEFINE(OF_THREADS, 1, [Whether we have threads])
	AC_SUBST(OFTHREAD_M, "OFThread.m")
	AC_SUBST(OFTHREADTESTS_M, "OFThreadTests.m")
	AC_SUBST(THREADING_H, "threading.h")

	AC_CHECK_FUNC(objc_sync_enter,, [
		AC_SUBST(OBJC_SYNC_M, "objc_sync.m")
		AC_DEFINE(NEED_OBJC_SYNC_INIT, 1,
			[Whether objc_sync_init needs to be called])
	])

	atomic_ops="none"

	AC_MSG_CHECKING(whether we have an atomic ops assembly implementation)
	AC_EGREP_CPP(yes, [
		#if defined(__GNUC__) && (defined(__i386__) || \
		    defined(__amd64__) || defined(__x86_64__))
		yes
		#endif
	], [
		AC_MSG_RESULT(yes)
		atomic_ops="assembly implementation"
	], [
		AC_MSG_RESULT(no)
	])

	AC_MSG_CHECKING(whether __sync_* works)
	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)
		test x"$atomic_ops" = x"none" && atomic_ops="gcc builtins"
		AC_DEFINE(OF_HAVE_GCC_ATOMIC_OPS, 1,
			[Whether gcc atomic operations are available])
	], [
		AC_MSG_RESULT(no)
	])

	AC_CHECK_HEADER(libkern/OSAtomic.h, [
		test x"$atomic_ops" = x"none" && atomic_ops="libkern/OSAtomic.h"
		AC_DEFINE(OF_HAVE_OSATOMIC, 1,
			[Whether we have libkern/OSAtomic.h])
		AC_CHECK_FUNC(OSAtomicAdd64Barrier, [
			AC_DEFINE(OF_HAVE_OSATOMIC_64, 1,
				[Whether we have OSAtomic*64])
		])
	])
], [
	dnl We can only have one thread - therefore everything is atomic
	atomic_ops="not needed"
])

AC_MSG_CHECKING(for atomic operations)
AS_IF([test x"$atomic_ops" != x"none"], [
	AC_DEFINE(OF_ATOMIC_OPS, 1, [Whether we have atomic operations])
	AC_SUBST(ATOMIC_H, "atomic.h")
])
AC_MSG_RESULT($atomic_ops)

AC_CHECK_LIB(socket, socket, LIBS="$LIBS -lsocket")
AC_CHECK_LIB(ws2_32, main, LIBS="$LIBS -lws2_32")

AC_CHECK_FUNC(gmtime_r, [
	AC_DEFINE(HAVE_GMTIME_R, 1, [Whether we have gmtime_r])
])
AC_CHECK_FUNC(localtime_r, [
	AC_DEFINE(HAVE_LOCALTIME_R, 1, [Whether we have localtime_r])
])

AC_CHECK_HEADER(poll.h, [
	AC_DEFINE(OF_HAVE_POLL, 1, [Whether poll is supported])
])
AC_CHECK_HEADERS(sys/select.h, [
	AC_DEFINE(OF_HAVE_SYS_SELECT_H, 1, [Whether we have sys/select.h])
])

AC_MSG_CHECKING(for getaddrinfo)
AC_TRY_COMPILE([
	#include <stddef.h>
	#ifndef _WIN32
	# include <sys/types.h>
	# include <sys/socket.h>
	# include <netdb.h>
	#else
	# define _WIN32_WINNT 0x0501
	# include <ws2tcpip.h>
	#endif
], [
	struct addrinfo ai;
	getaddrinfo(NULL, NULL, NULL, NULL);
], [
	AC_MSG_RESULT(yes)
	AC_DEFINE(HAVE_GETADDRINFO, 1, [Whether we have getaddrinfo])

	AS_IF([test x"$enable_threads" != x"no"], [
		AC_MSG_CHECKING(whether getaddrinfo is thread-safe)

		case "$host_os" in
			darwin[[12345]].*)
				have_threadsafe_getaddrinfo="no"
				;;
			darwin*)
				have_threadsafe_getaddrinfo="yes"
				;;
			freebsd[[1234]].* | freebsd5.[[1234]]*)
				have_threadsafe_getaddrinfo="no"
				;;
			freebsd*)
				have_threadsafe_getaddrinfo="yes"
				;;
			netbsd[[123]].*)
				have_threadsafe_getaddrinfo="no"
				;;
			netbsd*)
				have_threadsafe_getaddrinfo="yes"
				;;
			solaris*)
				have_threadsafe_getaddrinfo="yes"
				;;
			*)
				have_threadsafe_getaddrinfo="unknown"
				;;
		esac

		AS_IF([test x"$have_threadsafe_getaddrinfo" = x"unknown"], [
			AC_EGREP_CPP(yes, [
				#include <netdb.h>
				#ifdef h_errno
				yes
				#end
			], [
				have_threadsafe_getaddrinfo="yes"
			], [
				have_threadsafe_getaddrinfo="no"
			])
		])

		AS_IF([test x"$have_threadsafe_getaddrinfo" = x"yes"], [
			AC_DEFINE(HAVE_THREADSAFE_GETADDRINFO, 1,
				[Whether getaddrinfo is thread-safe])
		])

		AC_MSG_RESULT($have_threadsafe_getaddrinfo)
	])
], [
	AC_MSG_RESULT(no)
])

AC_CHECK_FUNC(madvise, [
	AC_DEFINE(HAVE_MADVISE, 1, [Whether we have madvise])
])

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

AS_IF([test x"$GOBJC" = x"yes"], [
	OBJCFLAGS="$OBJCFLAGS -Werror"

	AC_MSG_CHECKING(whether gcc has bug objc/27438)
	AC_TRY_COMPILE([
		#import <objc/objc.h>

		@interface OFConstantString
		{
			Class isa;
			const char *string;
			unsigned long size;
		}
		@end

		void *_OFConstantStringClassReference;
	], [
		OFConstantString *test = @"";
		test++; /* Get rid of unused variable warning */
	], [
		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([
		#import <objc/objc.h>

		@interface OFObject
		{
			Class isa;
		}
		@end

		static struct {
			Class isa;
		} object;
	], [
		OFObject *test = (OFObject*)&object;
		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*)
			AC_PATH_PROG(WINE, wine)

			AS_IF([test x"$WINE" != "x"], [
				AC_SUBST(TESTS, "tests")
				AC_SUBST(TEST_LAUNCHER, "$WINE")
			])
			;;
	esac
], [
	AC_SUBST(TESTS, "tests")
])

BUILDSYS_INIT
BUILDSYS_TOUCH_DEPS

dnl We don't call AC_PROG_CPP, but only AC_PROG_OBJCPP and set CPP to OBJCPP
dnl and add OBJCPPFLAGS to CPPFLAGS, thus we need to AC_SUBST these ourself
AC_SUBST(CPP)
AC_SUBST(CPPFLAGS)

AC_SUBST(PACKAGE, ObjFW)
AC_CONFIG_FILES([buildsys.mk extra.mk utils/objfw-config])
AC_CONFIG_HEADERS([config.h src/objfw-defs.h])
AC_OUTPUT