AC_INIT(ObjFW, 0.9-dev, js@heap.zone)
BUILDSYS_INIT
AS_IF([test configure.ac -nt configure], [
AC_MSG_ERROR([configure.ac is newer than configure! Run autoreconf!])
])
AC_CONFIG_SRCDIR(src)
AC_CONFIG_AUX_DIR(build-aux)
AC_CONFIG_MACRO_DIR(build-aux/m4)
AC_CANONICAL_HOST
dnl Used to disable checking for -pedantic on some platforms where it's broken
check_pedantic="yes"
case "$host" in
*-msdosdjgpp*)
enable_shared="no"
enable_threads="no"
enable_sockets="no"
;;
*-*-mingw*)
LDFLAGS="$LDFLAGS -Wl,--allow-multiple-definition"
AC_SUBST(ALLOW_MULTIPLE_DEFINITION,
[-Wl,--allow-multiple-definition])
;;
*-psp-*)
AS_IF([test x"$DEVKITPSP" = x""], [
AC_MSG_ERROR(
[DEVKITPSP is not set! Please set DEVKITPSP.])
])
OBJCFLAGS="$OBJCFLAGS -G0"
CPPFLAGS="$CPPFLAGS -I$DEVKITPSP/psp/sdk/include"
LDFLAGS="$LDFLAGS -G0"
LIBS="$LIBS -L$DEVKITPSP/psp/sdk/lib -lpspdebug -lpspdisplay"
LIBS="$LIBS -lpspge -lpspctrl -lpspsdk -lc -lpspnet"
LIBS="$LIBS -lpspnet_inet -lpspnet_apctl -lpspnet_resolver"
LIBS="$LIBS -lpsputility -lpspuser -lpspkernel"
enable_shared="no"
enable_threads="no" # TODO
enable_sockets="no" # TODO
check_pedantic="no"
AC_SUBST(MAP_LDFLAGS, ['-Wl,-Map,$@.map'])
;;
esac
AC_LANG([Objective C])
AC_PROG_OBJC([clang gcc])
AC_PROG_OBJCPP
AC_PROG_LN_S
AC_PROG_INSTALL
AC_PROG_EGREP
AC_ARG_WITH(wii,
AS_HELP_STRING([--with-wii], [build for Wii]))
AS_IF([test x"$with_wii" = x"yes"], [
AS_IF([test x"$DEVKITPRO" = x""], [
AC_MSG_ERROR([DEVKITPRO is not set! Please set DEVKITPRO.])
])
OBJCFLAGS="$OBJCFLAGS -mrvl -mcpu=750 -meabi -mhard-float"
CPPFLAGS="$CPPFLAGS -DGEKKO -I$DEVKITPRO/libogc/include"
LDFLAGS="$LDFLAGS -mrvl -mcpu=750 -meabi -mhard-float"
LIBS="$LIBS -L$DEVKITPRO/libogc/lib/wii -lfat -logc"
TESTS_LIBS="$TESTS_LIBS -lwiiuse -lbte"
enable_shared="no"
enable_threads="no" # TODO
AC_SUBST(MAP_LDFLAGS, ['-Wl,-Map,$@.map'])
])
AC_ARG_WITH(nds,
AS_HELP_STRING([--with-nds], [build for Nintendo DS]))
AS_IF([test x"$with_nds" = x"yes"], [
AS_IF([test x"$DEVKITPRO" = x""], [
AC_MSG_ERROR([DEVKITPRO is not set! Please set DEVKITPRO.])
])
OBJCFLAGS="$OBJCFLAGS -march=armv5te -mtune=arm946e-s"
OBJCFLAGS="$OBJCFLAGS -mthumb -mthumb-interwork"
CPPFLAGS="$CPPFLAGS -DARM9 -I$DEVKITPRO/libnds/include"
LDFLAGS="$LDFLAGS -specs=ds_arm9.specs"
LIBS="$LIBS -L$DEVKITPRO/libnds/lib -lfilesystem -lfat -lnds9"
enable_shared="no"
enable_threads="no" # TODO
enable_sockets="no" # TODO
check_pedantic="no"
AC_DEFINE(OF_NINTENDO_DS, 1,
[Whether we are compiling for the Nintendo DS])
AC_SUBST(MAP_LDFLAGS, ['-Wl,-Map,$@.map'])
])
AC_ARG_WITH(3ds,
AS_HELP_STRING([--with-3ds], [build for Nintendo 3DS]))
AS_IF([test x"$with_3ds" = x"yes"], [
AS_IF([test x"$DEVKITPRO" = x""], [
AC_MSG_ERROR([DEVKITPRO is not set! Please set DEVKITPRO.])
])
OBJCFLAGS="$OBJCFLAGS -march=armv6k -mtune=mpcore -mfloat-abi=hard"
OBJCFLAGS="$OBJCFLAGS -mtp=soft -mword-relocations"
CPPFLAGS="$CPPFLAGS -DARM11 -I$DEVKITPRO/libctru/include"
LDFLAGS="$LDFLAGS -specs=3dsx.specs -march=armv6k -mtune=mpcore"
LDFLAGS="$LDFLAGS -mfloat-abi=hard -mtp=soft -mword-relocations"
LIBS="$LIBS -L$DEVKITPRO/libctru/lib -lctru"
enable_shared="no"
enable_threads="no" # TODO
check_pedantic="no"
AC_DEFINE(OF_NINTENDO_3DS, 1,
[Whether we are compiling for the Nintendo 3DS])
AC_SUBST(MAP_LDFLAGS, ['-Wl,-Map,$@.map'])
])
CPP="$OBJCPP"
CPPFLAGS="$CPPFLAGS $OBJCPPFLAGS"
OBJCFLAGS="$OBJCFLAGS -Wall -fexceptions -fobjc-exceptions -funwind-tables"
OBJCFLAGS="$OBJCFLAGS -fconstant-string-class=OFConstantString"
case "$OBJC" in
*clang*)
case "$host" in
dnl Clang generates MIPS assembly not accepted by GNU
dnl as, however, Clang's integrated assembler doesn't
dnl accept everything used in ObjFW's assembly files.
dnl Therefore, use the integrated assembler for ObjC
dnl files, but not for assembly files.
mips*-*-*)
OBJCFLAGS="$OBJCFLAGS -integrated-as"
AC_SUBST(INTEGRATED_AS, "-integrated-as")
;;
dnl Clang's assembler on Windows is not complete yet
dnl and cannot compile all .S files.
*-*-mingw*)
ASFLAGS="$ASFLAGS -no-integrated-as"
;;
esac
;;
esac
AX_CHECK_COMPILER_FLAGS(-std=gnu11, [
OBJCFLAGS="$OBJCFLAGS -std=gnu11"
], [
AX_CHECK_COMPILER_FLAGS(-std=gnu1x, [
OBJCFLAGS="$OBJCFLAGS -std=gnu1x"
], [
AX_CHECK_COMPILER_FLAGS(-std=gnu99,
[OBJCFLAGS="$OBJCFLAGS -std=gnu99"])
])
])
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="$OBJCFLAGS -fno-constant-cfstrings"
AC_SUBST(NO_CONST_CFSTRINGS, "-fno-constant-cfstrings")
])
AX_CHECK_COMPILER_FLAGS(-Wshorten-64-to-32 -Werror,
[OBJCFLAGS="$OBJCFLAGS -Wshorten-64-to-32"])
AX_CHECK_COMPILER_FLAGS(-Wsemicolon-before-method-body -Werror,
[OBJCFLAGS="$OBJCFLAGS -Wsemicolon-before-method-body"])
AX_CHECK_COMPILER_FLAGS(-Wobjc-missing-property-synthesis -Werror,
[OBJCFLAGS="$OBJCFLAGS -Wobjc-missing-property-synthesis"])
AX_CHECK_COMPILER_FLAGS(-Wsign-compare -Werror,
[OBJCFLAGS="$OBJCFLAGS -Wsign-compare"])
AC_MSG_CHECKING(whether Objective C compiler supports properties)
AC_TRY_COMPILE([
@interface Foo
{
id bar;
}
@property (retain, nonatomic) id bar;
@end
], [
Foo *foo = (id)0;
[foo setBar: (id)0];
foo = [foo bar];
], [
AC_MSG_RESULT(yes)
], [
AC_MSG_RESULT(no)
AC_MSG_ERROR(Compiler does not support properties!)
])
AC_MSG_CHECKING(whether Objective C compiler supports blocks)
old_OBJCFLAGS="$OBJCFLAGS"
OBJCFLAGS="$OBJCFLAGS -fblocks"
AC_TRY_COMPILE([], [
int (^foo)(int bar);
foo = ^ (int bar) { return 0; }
], [
AC_SUBST(BLOCKS_FLAGS, "-fblocks")
AC_SUBST(OFBLOCKTESTS_M, "OFBlockTests.m")
AC_MSG_RESULT(yes)
], [
AC_MSG_RESULT(no)
OBJCFLAGS="$old_OBJCFLAGS"
])
AC_CHECK_TOOL(AR, ar)
AC_PROG_RANLIB
AC_ARG_ENABLE(shared,
AS_HELP_STRING([--disable-shared], [do not build shared library]))
AS_IF([test x"$enable_shared" != x"no"], [
BUILDSYS_SHARED_LIB
AC_SUBST(OBJFW_SHARED_LIB, "${LIB_PREFIX}objfw${LIB_SUFFIX}")
AC_SUBST(EXCEPTIONS_LIB_A, "exceptions.lib.a")
AC_SUBST(EXCEPTIONS_EXCEPTIONS_LIB_A, "exceptions/exceptions.lib.a")
AC_SUBST(FORWARDING_LIB_A, "forwarding.lib.a")
AC_SUBST(FORWARDING_FORWARDING_LIB_A, "forwarding/forwarding.lib.a")
AC_SUBST(LOOKUP_ASM_LIB_A, "lookup-asm.lib.a")
AC_SUBST(LOOKUP_ASM_LOOKUP_ASM_LIB_A, "lookup-asm/lookup-asm.lib.a")
], [
AC_SUBST(LIBOBJFW_DEP, "../src/libobjfw.a")
AC_SUBST(LIBOBJFW_DEP_LVL2, "../../src/libobjfw.a")
])
AC_ARG_ENABLE(static, AS_HELP_STRING([--enable-static], [build static library]))
AS_IF([test x"$enable_static" = x"yes" -o x"$enable_shared" = x"no"], [
AC_SUBST(OBJFW_STATIC_LIB, "libobjfw.a")
AC_SUBST(EXCEPTIONS_A, "exceptions.a")
AC_SUBST(EXCEPTIONS_EXCEPTIONS_A, "exceptions/exceptions.a")
AC_SUBST(FORWARDING_A, "forwarding.a")
AC_SUBST(FORWARDING_FORWARDING_A, "forwarding/forwarding.a")
AC_SUBST(LOOKUP_ASM_A, "lookup-asm.a")
AC_SUBST(LOOKUP_ASM_LOOKUP_ASM_A, "lookup-asm/lookup-asm.a")
])
AC_DEFINE_UNQUOTED(PLUGIN_SUFFIX, "$PLUGIN_SUFFIX", [Suffix for plugins])
AS_IF([test x"$PLUGIN_SUFFIX" != x""], [
AC_SUBST(USE_SRCS_PLUGINS, '${SRCS_PLUGINS}')
AC_SUBST(TESTPLUGIN, "plugin")
AC_DEFINE(OF_HAVE_PLUGINS, 1, [Whether we have plugin support])
])
AC_MSG_CHECKING(whether we need -D_GNU_SOURCE)
AC_EGREP_CPP(yes, [
#include <stdlib.h>
#if defined(__GLIBC__) || defined(__MINGW32__)
yes
#endif
], [
CPPFLAGS="-D_GNU_SOURCE $CPPFLAGS"
AC_MSG_RESULT(yes)
], [
AC_MSG_RESULT(no)
])
case "$host_os" in
solaris*)
CPPFLAGS="-D__EXTENSIONS__ -D_POSIX_PTHREAD_SEMANTICS $CPPFLAGS"
;;
esac
objc_runtime="ObjFW runtime"
AC_CHECK_HEADER(objc/objc.h)
AC_MSG_CHECKING(which Objective C runtime to use)
AC_ARG_ENABLE(runtime,
AS_HELP_STRING([--enable-runtime], [use the included runtime]))
AC_ARG_ENABLE(seluid24,
AS_HELP_STRING([--enable-seluid24],
[use 24 bit instead of 16 bit for selector UIDs]))
AS_IF([test x"$enable_runtime" != x"yes"], [
AS_IF([test x"$ac_cv_header_objc_objc_h" = x"yes"], [
AC_EGREP_CPP(yes, [
#import <objc/objc.h>
#ifdef OBJC_BOOL_DEFINED
yes
#endif
], [
objc_runtime="Apple runtime"
], [
dnl We don't want the GNU runtime
:
])
])
])
AC_MSG_RESULT($objc_runtime)
case "$objc_runtime" in
"ObjFW runtime")
AC_DEFINE(OF_OBJFW_RUNTIME, 1,
[Whether we use the ObjFW runtime])
AC_MSG_CHECKING([whether -fobjc-runtime=objfw is supported])
old_OBJCFLAGS="$OBJCFLAGS"
OBJCFLAGS="$OBJCFLAGS -fobjc-runtime=objfw"
AC_TRY_LINK([
@interface Test
+ (void)test;
@end
@implementation Test
+ (void)test
{
}
@end
void*
objc_msg_lookup(void *obj, void *sel)
{
return (void*)0;
}
void
__objc_exec_class(void *module)
{
}
], [
[Test test];
], [
RUNTIME_FLAGS="-fobjc-runtime=objfw"
AC_MSG_RESULT(yes)
], [
RUNTIME_FLAGS="-fgnu-runtime"
OBJCFLAGS="$old_OBJCFLAGS -fgnu-runtime"
AC_MSG_RESULT(no)
old_compiler="yes"
])
AC_SUBST(RUNTIME, "runtime")
AC_SUBST(RUNTIME_FLAGS)
if test x"$enable_shared" != x"no"; then
AC_SUBST(RUNTIME_LIB_A, "runtime.lib.a")
AC_SUBST(RUNTIME_RUNTIME_LIB_A, "runtime/runtime.lib.a")
fi
if test x"$enable_static" = x"yes" \
-o x"$enable_shared" = x"no"; then
AC_SUBST(RUNTIME_A, "runtime.a")
AC_SUBST(RUNTIME_RUNTIME_A, "runtime/runtime.a")
fi
AS_IF([test x"$enable_seluid24" = x"yes"], [
AC_DEFINE(OF_SELUID24, 1,
[Whether to use 24 bit selector UIDs])
])
AC_MSG_CHECKING(for exception type)
AC_TRY_COMPILE([
extern void foo();
], [
@try {
foo();
} @finally {
foo();
}
], [
AS_IF([$EGREP __gnu_objc_personality_v0 \
conftest.$ac_objext >/dev/null], [
exception_type="DWARF"
])
AS_IF([$EGREP __gnu_objc_personality_sj0 \
conftest.$ac_objext >/dev/null], [
exception_type="SjLj"
])
AS_IF([$EGREP __gnu_objc_personality_seh0 \
conftest.$ac_objext >/dev/null], [
exception_type="SEH"
])
case "$exception_type" in
DWARF)
AC_DEFINE(HAVE_DWARF_EXCEPTIONS, 1,
[Whether DWARF exceptions are used])
;;
SjLj)
AC_DEFINE(HAVE_SJLJ_EXCEPTIONS, 1,
[Whether SjLj exceptions are used])
;;
SEH)
AC_DEFINE(HAVE_SEH_EXCEPTIONS, 1,
[Whether SEH exceptions are used])
;;
*)
AC_MSG_RESULT(unknown)
AC_MSG_ERROR([Exception type not detected!])
;;
esac
AC_MSG_RESULT($exception_type)
], [
AC_MSG_RESULT(exceptions unavailable!)
AC_MSG_ERROR([Exceptions not accepted by compiler!])
])
;;
"Apple runtime")
AC_DEFINE(OF_APPLE_RUNTIME, 1,
[Whether we use the Apple ObjC runtime])
AC_CHECK_LIB(objc, objc_msgSend, [
LIBS="-lobjc $LIBS"
], [
AC_MSG_ERROR([libobjc not found!])
])
;;
esac
AC_CHECK_FUNC(objc_constructInstance, [], [
AC_SUBST(INSTANCE_M, "instance.m")
])
AC_CHECK_FUNC(objc_autoreleasePoolPush, [], [
AC_SUBST(AUTORELEASE_M, "autorelease.m")
])
case "$host_os" in
darwin*)
AC_SUBST(LDFLAGS_REEXPORT, ["-Wl,-reexport-lobjfw"])
AS_IF([test x"$objc_runtime" = x"Apple runtime"], [
AC_SUBST(REEXPORT_LIBOBJC, ["-Wl,-reexport-lobjc"])
LDFLAGS="$LDFLAGS -Wl,-U,_NSFoundationVersionNumber"
])
AS_IF([test x"$objc_runtime" = x"ObjFW runtime"], [
AS_IF([test x"$exception_type" = x"DWARF"], [
LDFLAGS="$LDFLAGS -Wl,-U,___gxx_personality_v0"
])
AS_IF([test x"$exception_type" = x"SjLj"], [
LDFLAGS="$LDFLAGS -Wl,-U,___gxx_personality_sj0"
])
])
AC_CHECK_HEADERS(sysdir.h)
AC_CHECK_FUNCS(sysdir_start_search_path_enumeration)
;;
esac
AC_C_BIGENDIAN([
AC_DEFINE(OF_BIG_ENDIAN, 1, [Whether we are big endian])
])
AS_IF([test x"$ac_cv_c_bigendian" = x"universal"], [
AC_DEFINE(OF_UNIVERSAL, 1, [Whether we are building a universal binary])
])
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, $size_max, [Maximum value for size_t])
])
AC_MSG_CHECKING(for SSIZE_MAX)
AC_EGREP_CPP(yes, [
#include <stdint.h>
#include <limits.h>
#ifdef SSIZE_MAX
yes
#endif
], [
AC_MSG_RESULT(yes)
], [
AC_MSG_RESULT(no)
AC_DEFINE(SSIZE_MAX, [((ssize_t)(SIZE_MAX / 2))],
[Maximum value for ssize_t])
])
AC_CHECK_TYPE(max_align_t,
[AC_DEFINE(OF_HAVE_MAX_ALIGN_T, 1, [Whether we have max_align_t])])
AC_CHECK_HEADER(stdnoreturn.h,
[AC_DEFINE(OF_HAVE_STDNORETURN_H, 1, [Whether we have stdnoreturn.h])])
AC_CHECK_SIZEOF(float)
AC_CHECK_SIZEOF(double)
AS_IF([test x"$ac_cv_sizeof_float" != x"4" -o x"$ac_cv_sizeof_double" != x"8"],
[AC_MSG_ERROR(
[Floating point implementation does not conform to IEEE 754!])])
AC_MSG_CHECKING(for floating point endianess)
fp_endianess="unknown"
AS_IF([test x"$ac_cv_c_bigendian" != x"universal"], [
AC_TRY_COMPILE([
double endianess = 2.993700760838795055656993580068609688772747263874402942272934826871811872228512759832626847251963763755836687759498519784550143745834860002945223766052808125982053455555265216112722718870586961456110693379343178124592311441022662940307099598578775368547768968914916965731708568179631324904813506101190853720749196062963892799499230635163056742330563321122389331703618066046034494287335316842529021563862331183541255013987734473643350285400060357711238514186776429325214739886098119655678483017894951556639821088508565036657794343031121375178126860889964700274558728491825977274341798997758923017217660272136611938897932105874133412726223468780517578125e-259;
], [
], [
AS_IF([$EGREP BigEnd conftest.$ac_objext >/dev/null], [
AC_DEFINE(OF_FLOAT_BIG_ENDIAN, 1,
[Whether floats are big endian])
fp_endianess="big endian"
], [
AS_IF([$EGREP dnEgiB conftest.$ac_objext >/dev/null], [
fp_endianess="little endian"
])
])
])
], [
fp_endianess="universal"
])
AC_MSG_RESULT($fp_endianess)
AS_IF([test x"$fp_endianess" = x"unknown"], [
AC_MSG_ERROR(
[Floating point implementation does not conform to IEEE 754!])])
case "$host_cpu" in
arm* | earm*)
AC_MSG_CHECKING(if VFP2 or above is available)
AC_TRY_COMPILE([], [
__asm__ __volatile__ (
"fstmfdd sp!, {d0-d7}"
);
], [
AC_DEFINE(HAVE_VFP2, 1, [Whether we have VFP2 or above])
AC_MSG_RESULT(yes)
], [
AC_MSG_RESULT(no)
])
;;
esac
AC_CHECK_FUNCS(strerror_r)
AC_CHECK_LIB(m, fmod, LIBS="$LIBS -lm")
AC_CHECK_FUNC(asprintf, [
case "$host" in
*-psp-*)
dnl asprintf is broken on the PSP, but snprintf works.
have_asprintf="no"
ac_cv_snprintf_useful_ret="yes"
;;
*)
have_asprintf="yes"
AC_DEFINE(HAVE_ASPRINTF, 1,
[Whether we have asprintf()])
;;
esac
], [
have_asprintf="no"
AC_MSG_CHECKING(whether snprintf returns something useful)
AC_CACHE_VAL(ac_cv_snprintf_useful_ret, [
AC_TRY_RUN([
#include <stdio.h>
int
main()
{
return (snprintf(NULL, 0, "asd") == 3 ? 0 : 1);
}
], [
ac_cv_snprintf_useful_ret="yes"
], [
ac_cv_snprintf_useful_ret="no"
], [
ac_cv_snprintf_useful_ret="no"
])
])
AC_MSG_RESULT($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!)
case "$host_os" in
mingw*)
AC_SUBST(OFSTDIOSTREAM_WIN32CONSOLE_M, "OFStdIOStream_Win32Console.m")
;;
esac
AC_ARG_ENABLE(unicode-tables,
AS_HELP_STRING([--disable-unicode-tables], [Disable Unicode tables]))
AS_IF([test x"$enable_unicode_tables" != x"no"], [
AC_DEFINE(OF_HAVE_UNICODE_TABLES, 1,
[Whether to build with Unicode tables])
AC_SUBST(UNICODE_M, "unicode.m")
])
AC_CHECK_FUNCS(sigaction)
AC_CHECK_FUNCS([arc4random random], break)
AC_CHECK_LIB(dl, dlopen, LIBS="$LIBS -ldl")
AC_CHECK_HEADERS_ONCE(dlfcn.h)
case "$host_os" in
netbsd*)
dnl dladdr exists on NetBSD, but it is completely broken.
dnl When using it with code that uses __thread, it freezes the
dnl process so that it has to be killed using SIGKILL.
dnl When disabling __thread, it doesn't freeze, but all symbols
dnl are wrong.
;;
*)
AC_CHECK_FUNCS(dladdr)
;;
esac
AC_ARG_ENABLE(threads,
AS_HELP_STRING([--disable-threads], [disable thread support]))
AS_IF([test x"$enable_threads" != x"no"], [
AC_MSG_CHECKING(for threads)
case "$host_os" in
mingw*)
AC_MSG_RESULT(WinAPI)
;;
*)
AC_MSG_RESULT(POSIX)
AX_CHECK_COMPILER_FLAGS(-pthread, [
CPPFLAGS="$CPPFLAGS -pthread"
], [
CPPFLAGS="$CPPFLAGS -D_REENTRANT -D_THREAD_SAFE"
])
AC_CHECK_LIB(pthread, pthread_create, LIBS="$LIBS -lpthread")
AC_TRY_LINK([
#include <pthread.h>
], [
pthread_create(NULL, NULL, NULL, NULL);
], [], [
AC_MSG_ERROR(No supported threads found!)
])
AC_DEFINE(OF_HAVE_PTHREADS, 1, [Whether we have pthreads])
AC_TRY_COMPILE([
#include <pthread.h>
], [
pthread_mutexattr_t attr;
pthread_mutexattr_settype(&attr,
PTHREAD_MUTEX_RECURSIVE);
], [
AC_DEFINE(OF_HAVE_RECURSIVE_PTHREAD_MUTEXES, 1,
[If pthread mutexes can be recursive])
])
AC_CHECK_FUNC(pthread_spin_lock, [
have_spinlocks="yes"
AC_DEFINE(OF_HAVE_PTHREAD_SPINLOCKS, 1,
[Whether we have pthread spinlocks])
])
AC_CHECK_FUNC(sched_yield, [
AC_DEFINE(OF_HAVE_SCHED_YIELD, 1,
[Whether we have sched_yield()])
])
AC_CHECK_FUNCS(pthread_attr_setinheritsched)
AC_CHECK_HEADERS(pthread_np.h, [], [], [#include <pthread.h>])
AC_CHECK_FUNCS(pthread_set_name_np pthread_setname_np, break)
;;
esac
AC_DEFINE(OF_HAVE_THREADS, 1, [Whether we have threads])
AC_SUBST(USE_SRCS_THREADS, '${SRCS_THREADS}')
AC_ARG_ENABLE(compiler-tls,
AS_HELP_STRING([--disable-compiler-tls],
[disable compiler thread local storage]))
case "$host" in
aarch64*-*-android*)
# Compiler TLS is broken on AArch64 Android with Clang
enable_compiler_tls="no"
;;
esac
AS_IF([test x"$enable_compiler_tls" != x"no"], [
AC_CHECK_HEADER(threads.h, [
AC_DEFINE(OF_HAVE_THREADS_H, 1,
[Whether we have threads.h])
])
AC_MSG_CHECKING(whether _Thread_local works)
AC_TRY_LINK([
static _Thread_local int x = 0;
], [
x++;
], [
AS_IF([test x"$enable_shared" != x"no"], [
old_OBJCFLAGS="$OBJCFLAGS"
OBJCFLAGS="$OBJCFLAGS -fPIC"
AC_TRY_COMPILE([
static _Thread_local int x = 0;
], [
x++;
], [
AC_MSG_RESULT(yes)
AC_DEFINE(OF_HAVE__THREAD_LOCAL, 1,
[Whether _Thread_local works])
], [
AC_MSG_RESULT(no)
])
OBJCFLAGS="$old_OBJCFLAGS"
], [
AC_MSG_RESULT(yes)
AC_DEFINE(OF_HAVE__THREAD_LOCAL, 1,
[Whether _Thread_local works])
])
], [
AC_MSG_RESULT(no)
AC_MSG_CHECKING(whether __thread works)
AC_TRY_LINK([
/* It seems __thread is buggy with GCC 4.1 */
#if __GNUC__ == 4 && __GNUC_MINOR__ < 2
# error buggy
#endif
__thread int x = 0;
], [
x++;
], [
AS_IF([test x"$enable_shared" != x"no"], [
old_OBJCFLAGS="$OBJCFLAGS"
OBJCFLAGS="$OBJCFLAGS -fPIC"
AC_TRY_COMPILE([
__thread int x = 0;
], [
x++;
], [
AC_MSG_RESULT(yes)
AC_DEFINE(OF_HAVE___THREAD, 1,
[Whether __thread works]
)
], [
AC_MSG_RESULT(no)
])
OBJCFLAGS="$old_OBJCFLAGS"
], [
AC_MSG_RESULT(yes)
AC_DEFINE(OF_HAVE___THREAD, 1,
[Whether __thread works])
])
], [
AC_MSG_RESULT(no)
])
])
])
atomic_ops="none"
AC_MSG_CHECKING(whether we have an atomic ops assembly implementation)
AC_EGREP_CPP(yes, [
#if defined(__GNUC__) && (defined(__i386__) || \
defined(__x86_64__) || defined(__amd64__)) || \
defined(__ppc__)
yes
#endif
], [
AC_MSG_RESULT(yes)
atomic_ops="assembly implementation"
], [
AC_MSG_RESULT(no)
])
AC_MSG_CHECKING(whether __atomic_* works)
AC_TRY_LINK([
#include <stdbool.h>
#include <stdint.h>
], [
int32_t i, j;
if (__atomic_add_fetch(&i, 1, __ATOMIC_RELAXED))
j = __atomic_sub_fetch(&i, 1, __ATOMIC_RELAXED);
while (!__atomic_compare_exchange_n(&i, &j, 1, false,
__ATOMIC_RELAXED, __ATOMIC_RELAXED));
__atomic_thread_fence(__ATOMIC_SEQ_CST);
], [
AC_MSG_RESULT(yes)
test x"$atomic_ops" = x"none" && \
atomic_ops="__atomic_* builtins"
AC_DEFINE(OF_HAVE_ATOMIC_BUILTINS, 1,
[Whether __atomic_* builtins are available])
], [
AC_MSG_RESULT(no)
])
AC_MSG_CHECKING(whether __sync_* works)
AC_TRY_LINK([#include <stdint.h>], [
int32_t i, j;
if (__sync_add_and_fetch(&i, 1))
j = __sync_sub_and_fetch(&i, 1);
while (!__sync_bool_compare_and_swap(&i, 0, 1));
], [
AC_MSG_RESULT(yes)
test x"$atomic_ops" = x"none" && \
atomic_ops="__sync_* builtins"
AC_DEFINE(OF_HAVE_SYNC_BUILTINS, 1,
[Whether __sync_* builtins are available])
], [
AC_MSG_RESULT(no)
])
AC_CHECK_HEADER(libkern/OSAtomic.h, [
test x"$atomic_ops" = x"none" && atomic_ops="libkern/OSAtomic.h"
AC_DEFINE(OF_HAVE_OSATOMIC, 1,
[Whether we have libkern/OSAtomic.h])
])
], [
dnl We can only have one thread - therefore everything is atomic
atomic_ops="not needed"
])
AC_MSG_CHECKING(for atomic operations)
AS_IF([test x"$atomic_ops" != x"none"], [
AC_DEFINE(OF_HAVE_ATOMIC_OPS, 1, [Whether we have atomic operations])
AC_SUBST(USE_INCLUDES_ATOMIC, '${INCLUDES_ATOMIC}')
])
AC_MSG_RESULT($atomic_ops)
AC_ARG_ENABLE(files,
AS_HELP_STRING([--disable-files], [disable file support]))
AS_IF([test x"$enable_files" != x"no"], [
AC_DEFINE(OF_HAVE_FILES, 1, [Whether we have files])
AC_SUBST(USE_SRCS_FILES, '${SRCS_FILES}')
AC_SUBST(OFHASH, "ofhash")
AC_SUBST(OFZIP, "ofzip")
AC_CHECK_TYPE(off64_t, [
AC_DEFINE(OF_HAVE_OFF64_T, 1, [Whether we have off64_t])
])
AC_CHECK_HEADERS([pwd.h grp.h])
AC_CHECK_FUNC(chmod, [
AC_DEFINE(OF_HAVE_CHMOD, 1, [Whether we have chmod()])
])
AC_CHECK_FUNC(chown, [
AC_DEFINE(OF_HAVE_CHOWN, 1, [Whether we have chown()])
])
AC_CHECK_FUNC(link, [
AC_DEFINE(OF_HAVE_LINK, 1, [Whether we have link()])
])
AC_CHECK_FUNC(symlink, [
AC_DEFINE(OF_HAVE_SYMLINK, 1, [Whether we have symlink()])
])
AC_CHECK_FUNC(readlink, [
AC_DEFINE(OF_HAVE_READLINK, 1, [Whether we have readlink()])
])
AC_CHECK_FUNCS([lstat])
old_OBJCFLAGS="$OBJCFLAGS"
OBJCFLAGS="$OBJCFLAGS -Werror=deprecated"
AC_MSG_CHECKING(for readdir_r)
AC_TRY_COMPILE([
#include <dirent.h>
], [
DIR *dir = 0;
struct dirent entry, *result;
readdir_r(dir, &entry, &result);
], [
AC_MSG_RESULT(yes)
AC_DEFINE(HAVE_READDIR_R, 1, [Whether we have readdir_r()])
], [
AC_MSG_RESULT(no)
])
OBJCFLAGS="$old_OBJCFLAGS"
])
AC_CHECK_FUNCS([sysconf gmtime_r localtime_r nanosleep fcntl])
AC_CHECK_HEADERS(xlocale.h)
AC_CHECK_FUNCS([strtod_l strtof_l vasprintf_l])
AC_CHECK_FUNC(pipe, [
AC_DEFINE(OF_HAVE_PIPE, 1, [Whether we have pipe()])
])
AC_ARG_ENABLE(sockets,
AS_HELP_STRING([--disable-sockets], [disable socket support]))
AS_IF([test x"$enable_sockets" != x"no"], [
AC_DEFINE(OF_HAVE_SOCKETS, 1, [Whether we have sockets])
AC_SUBST(USE_SRCS_SOCKETS, '${SRCS_SOCKETS}')
AS_IF([test x"$enable_files" != x"no"], [
AC_SUBST(OFHTTP, "ofhttp")
])
AC_CHECK_LIB(socket, socket, LIBS="$LIBS -lsocket")
AC_CHECK_LIB(network, socket, LIBS="$LIBS -lnetwork")
AC_CHECK_LIB(ws2_32, main, LIBS="$LIBS -lws2_32")
AC_CHECK_HEADER(sys/socket.h, [
AC_DEFINE(OF_HAVE_SYS_SOCKET_H, 1,
[Whether we have sys/socket.h])
])
AC_CHECK_HEADER(netinet/in.h, [
AC_DEFINE(OF_HAVE_NETINET_IN_H, 1,
[Whether we have netinet/in.h])
])
AC_CHECK_HEADER(netinet/tcp.h, [
AC_DEFINE(OF_HAVE_NETINET_TCP_H, 1,
[Whether we have netinet/tcp.h])
])
AC_CHECK_HEADERS([arpa/inet.h netdb.h])
AC_CHECK_MEMBER([struct sockaddr_in6.sin6_addr], [
AC_EGREP_CPP(yes, [
#ifdef OF_HAVE_SYS_SOCKET_H
# include <sys/socket.h>
#endif
#ifdef _WIN32
# ifdef __MINGW32__
# include <_mingw.h>
# ifdef __MINGW64_VERSION_MAJOR
# include <winsock2.h>
# endif
# endif
# include <windows.h>
# include <ws2tcpip.h>
#endif
#ifdef AF_INET6
yes
#endif
], [
AC_DEFINE(OF_HAVE_IPV6, 1, [Whether we have IPv6])
])
], [
], [
#ifdef OF_HAVE_NETINET_IN_H
# include <netinet/in.h>
#endif
#ifdef _WIN32
# ifdef __MINGW32__
# include <_mingw.h>
# ifdef __MINGW64_VERSION_MAJOR
# include <winsock2.h>
# endif
# endif
# include <windows.h>
# include <ws2tcpip.h>
#endif
])
AC_CHECK_FUNCS([paccept accept4])
AC_CHECK_FUNC(kqueue, [
AC_DEFINE(HAVE_KQUEUE, 1, [Whether we have kqueue])
AC_SUBST(OFKERNELEVENTOBSERVER_KQUEUE_M,
"OFKernelEventObserver_kqueue.m")
AC_CHECK_FUNCS(kqueue1)
])
AC_CHECK_FUNC(epoll_create, [
AC_DEFINE(HAVE_EPOLL, 1, [Whether we have epoll])
AC_SUBST(OFKERNELEVENTOBSERVER_EPOLL_M,
"OFKernelEventObserver_epoll.m")
AC_CHECK_FUNCS(epoll_create1)
])
AC_CHECK_HEADER(poll.h, [
AC_DEFINE(HAVE_POLL_H, 1, [Whether we have poll.h])
AC_SUBST(OFKERNELEVENTOBSERVER_POLL_M,
"OFKernelEventObserver_poll.m")
])
AC_CHECK_HEADER(sys/select.h, [
AC_DEFINE(HAVE_SYS_SELECT_H, 1, [Whether we have sys/select.h])
AC_SUBST(OFKERNELEVENTOBSERVER_SELECT_M,
"OFKernelEventObserver_select.m")
])
case "$host_os" in
mingw*)
AC_SUBST(OFKERNELEVENTOBSERVER_SELECT_M,
"OFKernelEventObserver_select.m")
;;
esac
AS_IF([test x"$with_wii" = x"yes"], [
AC_SUBST(OFKERNELEVENTOBSERVER_POLL_M,
"OFKernelEventObserver_poll.m")
])
AC_MSG_CHECKING(for getaddrinfo)
AC_TRY_COMPILE([
#include <stddef.h>
#ifndef _WIN32
# include <sys/types.h>
#endif
#ifdef HAVE_SYS_SOCKET_H
# include <sys/socket.h>
#endif
#ifdef HAVE_NETDB_H
# include <netdb.h>
#endif
#ifdef _WIN32
typedef unsigned char BOOL;
# include <ws2tcpip.h>
#endif
], [
struct addrinfo ai;
getaddrinfo(NULL, NULL, NULL, NULL);
], [
AC_MSG_RESULT(yes)
AC_DEFINE(HAVE_GETADDRINFO, 1, [Whether we have getaddrinfo()])
AS_IF([test x"$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, [
#ifndef _WIN32
# include <sys/types.h>
#endif
#ifdef HAVE_SYS_SOCKET_H
# include <sys/socket.h>
#endif
#ifdef HAVE_NETDB_H
# include <netdb.h>
#endif
#ifdef _WIN32
# define _WIN32_WINNT 0x0501
# include <windows.h>
# include <ws2tcpip.h>
#endif
#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)
])
])
AS_IF([test x"$enable_sockets" != x"no" -a x"$enable_threads" != x"no"], [
AC_SUBST(OFHTTPCLIENTTESTS_M, "OFHTTPClientTests.m")
])
AC_DEFUN([CHECK_BUILTIN_BSWAP], [
AC_MSG_CHECKING(for __builtin_bswap$1)
AC_TRY_LINK([
#include <stdint.h>
#include <stdio.h>
#include <inttypes.h>
#include <errno.h>
], [
uint$1_t i = errno;
printf("%" PRIu$1, __builtin_bswap$1(i));
], [
AC_MSG_RESULT(yes)
AC_DEFINE(OF_HAVE_BUILTIN_BSWAP$1, 1,
[Whether we have __builtin_bswap$1])
], [
AC_MSG_RESULT(no)
])
])
CHECK_BUILTIN_BSWAP(16)
CHECK_BUILTIN_BSWAP(32)
CHECK_BUILTIN_BSWAP(64)
case "$host" in
arm*-apple-darwin*)
have_processes="no"
;;
*-*-mingw*)
have_processes="yes"
;;
*-*-msdosdjgpp*)
have_processes="no"
;;
*)
AC_CHECK_FUNCS(kill)
AC_CHECK_FUNCS(posix_spawnp, [
AS_IF([test x"$ac_cv_func_kill" = x"yes"], [
have_processes="yes"
AC_CHECK_HEADERS(spawn.h)
])
], [
AC_CHECK_FUNCS([vfork dup2 execvp _exit], [
AS_IF([test x"$ac_cv_func_vfork" = x"yes" \
-a x"$ac_cv_func_pipe" = x"yes" \
-a x"$ac_cv_func_dup2" = x"yes" \
-a x"$ac_cv_func_execvp" = x"yes" \
-a x"$ac_cv_func_kill" = x"yes" \
-a x"$ac_cv_func__exit" = x"yes"], [
have_processes="yes"
])
], [
break
])
])
;;
esac
AS_IF([test x"$have_processes" = x"yes"], [
AC_SUBST(OFPROCESS_M, "OFProcess.m")
AC_DEFINE(OF_HAVE_PROCESSES, 1, [Whether we have processes])
])
AC_CHECK_HEADERS_ONCE([sys/ioctl.h sys/ttycom.h])
AS_IF([test x"$objc_runtime" = x"Apple runtime"], [
AC_CHECK_HEADER(Foundation/NSObject.h, [
AC_SUBST(FOUNDATION_COMPAT_M, "foundation-compat.m")
AC_SUBST(BRIDGE, "bridge")
AS_IF([test x"$enable_shared" != x"no"], [
AC_SUBST(OBJFW_BRIDGE_SHARED_LIB,
"${LIB_PREFIX}objfw-bridge${LIB_SUFFIX}")
])
AS_IF([test x"$enable_static" = x"yes" \
-o x"$enable_shared" = x"no"], [
AC_SUBST(OBJFW_BRIDGE_STATIC_LIB, "libobjfw-bridge.a")
])
])
])
AS_IF([test x"$GOBJC" = x"yes"], [
OBJCFLAGS="$OBJCFLAGS -Wwrite-strings -Wpointer-arith -Werror"
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="$OBJCFLAGS -Wno-strict-aliasing"
])
AC_MSG_CHECKING(
whether we need -Wno-unused-property-ivar due to Clang bugs)
AC_TRY_COMPILE([
#ifdef __has_attribute
# if __has_attribute(objc_root_class)
__attribute__((__objc_root_class__))
# endif
#endif
@interface Foo
{
struct objc_class *_isa;
Foo *_foo;
}
@property (readonly, retain) Foo *foo;
+ (Foo*)foo;
@end
@implementation Foo
@synthesize foo = _foo;
+ (Foo*)foo
{
return (Foo*)0;
}
@end
], [
], [
AC_MSG_RESULT(no)
], [
AC_MSG_RESULT(yes)
OBJCFLAGS="$OBJCFLAGS -Wno-unused-property-ivar"
])
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
@implementation Foo
- (void)foo
{
struct objc_class *c = _isa;
(void)c;
}
@end
], [
], [
AC_MSG_RESULT(no)
], [
AC_MSG_RESULT(yes)
OBJCFLAGS="$old_OBJCFLAGS"
])
old_OBJCFLAGS="$OBJCFLAGS"
OBJCFLAGS="$OBJCFLAGS -Wunreachable-code"
AC_MSG_CHECKING(whether -Wunreachable-code can be used)
AC_TRY_COMPILE([
#include <stdlib.h>
typedef void *SEL;
#ifdef __has_attribute
# if __has_attribute(objc_root_class)
__attribute__((__objc_root_class__))
# endif
#endif
@interface Object
- (void)doesNotRecognizeSelector: (SEL)selector
#ifdef __clang__
__attribute__((__noreturn__))
#endif
;
- (void)dealloc;
@end
@interface Foo: Object
@end
/*
* Unfortunately, this cannot be shorter, as it only works when
* it is used inside a macro.
*/
#ifdef __clang__
# define OF_DEALLOC_UNSUPPORTED \
[self doesNotRecognizeSelector: _cmd]; \
\
abort(); \
\
_Pragma("clang diagnostic push ignore \"-Wunreachable-code\""); \
[super dealloc]; \
_Pragma("clang diagnostic pop");
#else
# define OF_DEALLOC_UNSUPPORTED \
[self doesNotRecognizeSelector: _cmd]; \
\
abort(); \
\
[super dealloc];
#endif
@implementation Foo
- (void)dealloc
{
OF_DEALLOC_UNSUPPORTED
}
@end
], [], [
AC_MSG_RESULT(yes)
], [
AC_MSG_RESULT(no)
OBJCFLAGS="$old_OBJCFLAGS"
])
old_OBJCFLAGS="$OBJCFLAGS"
OBJCFLAGS="$OBJCFLAGS -Wdocumentation"
AC_MSG_CHECKING(whether -Wdocumentation works correctly)
AC_TRY_COMPILE([
/*!
* @class Test conftest.m conftest.m
*/
@interface Test
@end
], [
], [
AC_MSG_RESULT(yes)
], [
AC_MSG_RESULT(no)
OBJCFLAGS="$old_OBJCFLAGS"
])
AS_IF([test x"$check_pedantic" = x"yes"], [
old_OBJCFLAGS="$OBJCFLAGS"
OBJCFLAGS="$OBJCFLAGS -pedantic"
AC_MSG_CHECKING(whether -pedantic is buggy)
AC_TRY_COMPILE([
#include <stdlib.h>
@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*)
AC_CHECK_PROG(WINE, wine, wine)
AS_IF([test x"$WINE" != x""], [
AC_SUBST(RUN_TESTS, "run")
AC_SUBST(TEST_LAUNCHER, "$WINE")
])
;;
esac
AS_IF([test x"$with_wii" = x"yes"], [
dnl Keep this lowercase, as WIILOAD is a variable used by
dnl wiiload and thus likely already set by the user to something
dnl that is not the path of the wiiload binary.
AC_CHECK_PROG(wiiload, wiiload, wiiload)
AS_IF([test x"$wiiload" != x""], [
AC_SUBST(RUN_TESTS, "run")
AC_SUBST(TEST_LAUNCHER, "$wiiload")
])
])
], [
AC_SUBST(RUN_TESTS, "run")
])
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)
dnl We use the ObjC compiler as our assembler
AC_SUBST(AS, $OBJC)
AC_SUBST(ASFLAGS)
AC_SUBST(AS_DEPENDS, '${OBJC_DEPENDS}')
AC_SUBST(TESTS_LIBS)
AC_CONFIG_FILES([
buildsys.mk
extra.mk
misc/Bridge-Info.plist
misc/Info.plist
misc/Tests-Info.plist
utils/objfw-config
])
AC_CONFIG_HEADERS([config.h src/objfw-defs.h])
AC_OUTPUT
AS_IF([test x"$old_compiler" = x"yes"], [
echo
printf " ** Note: Your compiler does not seem to "
echo "accept -fobjc-runtime=objfw."
printf " ** To get optimal performance, you should install "
echo "Clang >= 3.2"
printf " ** (or the latest Clang release to be able to use all "
echo "features)."
echo
])
AS_IF([test x"$enable_threads" != x"no" -a x"$atomic_ops" = x"none" \
-a x"$have_spinlocks" != x"yes"], [
echo
printf " ** Warning: You have enabled threads, but neither atomic "
echo "operations nor"
printf " ** spinlocks are available. Expect *very* poor performance, "
echo "as a mutex will"
printf " ** be locked for every retain and release! If you don't "
echo "need threads, try"
echo " ** --disable-threads to work around this problem."
echo
])