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configure.in @ 47

Last change on this file since 47 was 25, checked in by landauf, 17 years ago
added tcl to libs
File size: 33.5 KB

Rev	Line
[25]	1	#! /bin/bash -norc
	2	dnl This file is an input file used by the GNU "autoconf" program to
	3	dnl generate the file "configure", which is run during Tcl installation
	4	dnl to configure the system for the local environment.
	5	#
	6	# RCS: @(#) $Id: configure.in,v 1.180 2008/03/28 17:31:47 dgp Exp $
	7
	8	AC_INIT([tcl],[8.5])
	9	AC_PREREQ(2.59)
	10
	11	dnl This is only used when included from macosx/configure.ac
	12	m4_ifdef([SC_USE_CONFIG_HEADERS], [
	13	AC_CONFIG_HEADERS([tclConfig.h:../unix/tclConfig.h.in])
	14	AC_CONFIG_COMMANDS_PRE([DEFS="-DHAVE_TCL_CONFIG_H -imacros tclConfig.h"])
	15	AH_TOP([
	16	#ifndef _TCLCONFIG
	17	#define _TCLCONFIG])
	18	AH_BOTTOM([
	19	/* Undef unused package specific autoheader defines so that we can
	20	* include both tclConfig.h and tkConfig.h at the same time: */
	21	/* override */ #undef PACKAGE_NAME
	22	/* override */ #undef PACKAGE_STRING
	23	/* override */ #undef PACKAGE_TARNAME
	24	#endif /* _TCLCONFIG */])
	25	])
	26
	27	TCL_VERSION=8.5
	28	TCL_MAJOR_VERSION=8
	29	TCL_MINOR_VERSION=5
	30	TCL_PATCH_LEVEL=".2"
	31	VERSION=${TCL_VERSION}
	32
	33	#------------------------------------------------------------------------
	34	# Handle the --prefix=... option
	35	#------------------------------------------------------------------------
	36
	37	if test "${prefix}" = "NONE"; then
	38	prefix=/usr/local
	39	fi
	40	if test "${exec_prefix}" = "NONE"; then
	41	exec_prefix=$prefix
	42	fi
	43	# Make sure srcdir is fully qualified!
	44	srcdir="`cd "$srcdir" ; pwd`"
	45	TCL_SRC_DIR="`cd "$srcdir"/..; pwd`"
	46
	47	#------------------------------------------------------------------------
	48	# Compress and/or soft link the manpages?
	49	#------------------------------------------------------------------------
	50
	51	SC_CONFIG_MANPAGES
	52
	53	#------------------------------------------------------------------------
	54	# Standard compiler checks
	55	#------------------------------------------------------------------------
	56
	57	# If the user did not set CFLAGS, set it now to keep
	58	# the AC_PROG_CC macro from adding "-g -O2".
	59	if test "${CFLAGS+set}" != "set" ; then
	60	CFLAGS=""
	61	fi
	62
	63	AC_PROG_CC
	64	AC_C_INLINE
	65
	66	#--------------------------------------------------------------------
	67	# Supply substitutes for missing POSIX header files. Special notes:
	68	# - stdlib.h doesn't define strtol, strtoul, or
	69	# strtod insome versions of SunOS
	70	# - some versions of string.h don't declare procedures such
	71	# as strstr
	72	# Do this early, otherwise an autoconf bug throws errors on configure
	73	#--------------------------------------------------------------------
	74
	75	SC_MISSING_POSIX_HEADERS
	76
	77	#------------------------------------------------------------------------
	78	# If we're using GCC, see if the compiler understands -pipe. If so, use it.
	79	# It makes compiling go faster. (This is only a performance feature.)
	80	#------------------------------------------------------------------------
	81
	82	if test -z "$no_pipe" && test -n "$GCC"; then
	83	AC_CACHE_CHECK([if the compiler understands -pipe],
	84	tcl_cv_cc_pipe, [
	85	hold_cflags=$CFLAGS; CFLAGS="$CFLAGS -pipe"
	86	AC_TRY_COMPILE(,, tcl_cv_cc_pipe=yes, tcl_cv_cc_pipe=no)
	87	CFLAGS=$hold_cflags])
	88	if test $tcl_cv_cc_pipe = yes; then
	89	CFLAGS="$CFLAGS -pipe"
	90	fi
	91	fi
	92
	93	#------------------------------------------------------------------------
	94	# Threads support
	95	#------------------------------------------------------------------------
	96
	97	SC_ENABLE_THREADS
	98
	99	#------------------------------------------------------------------------
	100	# Embedded configuration information, encoding to use for the values, TIP #59
	101	#------------------------------------------------------------------------
	102
	103	SC_TCL_CFG_ENCODING
	104
	105	#--------------------------------------------------------------------
	106	# Look for libraries that we will need when compiling the Tcl shell
	107	#--------------------------------------------------------------------
	108
	109	SC_TCL_LINK_LIBS
	110
	111	# Add the threads support libraries
	112	LIBS="$LIBS$THREADS_LIBS"
	113
	114	SC_ENABLE_SHARED
	115
	116	#--------------------------------------------------------------------
	117	# The statements below define a collection of compile flags. This
	118	# macro depends on the value of SHARED_BUILD, and should be called
	119	# after SC_ENABLE_SHARED checks the configure switches.
	120	#--------------------------------------------------------------------
	121
	122	SC_CONFIG_CFLAGS
	123
	124	SC_ENABLE_SYMBOLS(bccdebug)
	125
	126	AC_DEFINE(TCL_TOMMATH, 1, [Build libtommath?])
	127	AC_DEFINE(MP_PREC, 4, [Default libtommath precision.])
	128
	129	#--------------------------------------------------------------------
	130	# Detect what compiler flags to set for 64-bit support.
	131	#--------------------------------------------------------------------
	132
	133	SC_TCL_EARLY_FLAGS
	134
	135	SC_TCL_64BIT_FLAGS
	136
	137	#--------------------------------------------------------------------
	138	# Check endianness because we can optimize comparisons of
	139	# Tcl_UniChar strings to memcmp on big-endian systems.
	140	#--------------------------------------------------------------------
	141
	142	AC_C_BIGENDIAN
	143
	144	#--------------------------------------------------------------------
	145	# Supply substitutes for missing POSIX library procedures, or
	146	# set flags so Tcl uses alternate procedures.
	147	#--------------------------------------------------------------------
	148
	149	# Check if Posix compliant getcwd exists, if not we'll use getwd.
	150	AC_CHECK_FUNCS(getcwd, , [AC_DEFINE(USEGETWD, 1, [Is getcwd Posix-compliant?])])
	151	# Nb: if getcwd uses popen and pwd(1) (like SunOS 4) we should really
	152	# define USEGETWD even if the posix getcwd exists. Add a test ?
	153
	154	AC_REPLACE_FUNCS(opendir strtol waitpid)
	155	AC_CHECK_FUNC(strerror, , [AC_DEFINE(NO_STRERROR, 1, [Do we have strerror()])])
	156	AC_CHECK_FUNC(getwd, , [AC_DEFINE(NO_GETWD, 1, [Do we have getwd()])])
	157	AC_CHECK_FUNC(wait3, , [AC_DEFINE(NO_WAIT3, 1, [Do we have wait3()])])
	158	AC_CHECK_FUNC(uname, , [AC_DEFINE(NO_UNAME, 1, [Do we have uname()])])
	159
	160	if test "`uname -s`" = "Darwin" && test "${TCL_THREADS}" = 1 && \
	161	test "`uname -r \| awk -F. '{print [$]1}'`" -lt 7; then
	162	# prior to Darwin 7, realpath is not threadsafe, so don't
	163	# use it when threads are enabled, c.f. bug # 711232
	164	ac_cv_func_realpath=no
	165	fi
	166	AC_CHECK_FUNC(realpath, , [AC_DEFINE(NO_REALPATH, 1, [Do we have realpath()])])
	167
	168	SC_TCL_GETADDRINFO
	169
	170	#--------------------------------------------------------------------
	171	# Look for thread-safe variants of some library functions.
	172	#--------------------------------------------------------------------
	173
	174	if test "${TCL_THREADS}" = 1; then
	175	SC_TCL_GETPWUID_R
	176	SC_TCL_GETPWNAM_R
	177	SC_TCL_GETGRGID_R
	178	SC_TCL_GETGRNAM_R
	179	if test "`uname -s`" = "Darwin" && \
	180	test "`uname -r \| awk -F. '{print [$]1}'`" -gt 5; then
	181	# Starting with Darwin 6 (Mac OSX 10.2), gethostbyX
	182	# are actually MT-safe as they always return pointers
	183	# from TSD instead of static storage.
	184	AC_DEFINE(HAVE_MTSAFE_GETHOSTBYNAME, 1,
	185	[Do we have MT-safe gethostbyname() ?])
	186	AC_DEFINE(HAVE_MTSAFE_GETHOSTBYADDR, 1,
	187	[Do we have MT-safe gethostbyaddr() ?])
	188
	189	elif test "`uname -s`" = "HP-UX" && \
	190	test "`uname -r\|sed -e 's\|B\.\|\|' -e 's\|\..*$\|\|'`" -gt 10; then
	191	# Starting with HPUX 11.00 (we believe), gethostbyX
	192	# are actually MT-safe as they always return pointers
	193	# from TSD instead of static storage.
	194	AC_DEFINE(HAVE_MTSAFE_GETHOSTBYNAME, 1,
	195	[Do we have MT-safe gethostbyname() ?])
	196	AC_DEFINE(HAVE_MTSAFE_GETHOSTBYADDR, 1,
	197	[Do we have MT-safe gethostbyaddr() ?])
	198
	199	else
	200	SC_TCL_GETHOSTBYNAME_R
	201	SC_TCL_GETHOSTBYADDR_R
	202	fi
	203	fi
	204
	205	#---------------------------------------------------------------------------
	206	# Determine which interface to use to talk to the serial port.
	207	# Note that #include lines must begin in leftmost column for
	208	# some compilers to recognize them as preprocessor directives.
	209	#---------------------------------------------------------------------------
	210
	211	SC_SERIAL_PORT
	212
	213	#--------------------------------------------------------------------
	214	# Include sys/select.h if it exists and if it supplies things
	215	# that appear to be useful and aren't already in sys/types.h.
	216	# This appears to be true only on the RS/6000 under AIX. Some
	217	# systems like OSF/1 have a sys/select.h that's of no use, and
	218	# other systems like SCO UNIX have a sys/select.h that's
	219	# pernicious. If "fd_set" isn't defined anywhere then set a
	220	# special flag.
	221	#--------------------------------------------------------------------
	222
	223	AC_CACHE_CHECK([for fd_set in sys/types], tcl_cv_type_fd_set, [
	224	AC_TRY_COMPILE([#include <sys/types.h>],[fd_set readMask, writeMask;],
	225	tcl_cv_type_fd_set=yes, tcl_cv_type_fd_set=no)])
	226	tcl_ok=$tcl_cv_type_fd_set
	227	if test $tcl_ok = no; then
	228	AC_CACHE_CHECK([for fd_mask in sys/select], tcl_cv_grep_fd_mask, [
	229	AC_EGREP_HEADER(fd_mask, sys/select.h,
	230	tcl_cv_grep_fd_mask=present, tcl_cv_grep_fd_mask=missing)])
	231	if test $tcl_cv_grep_fd_mask = present; then
	232	AC_DEFINE(HAVE_SYS_SELECT_H, 1, [Should we include <sys/select.h>?])
	233	tcl_ok=yes
	234	fi
	235	fi
	236	if test $tcl_ok = no; then
	237	AC_DEFINE(NO_FD_SET, 1, [Do we have fd_set?])
	238	fi
	239
	240	#------------------------------------------------------------------------------
	241	# Find out all about time handling differences.
	242	#------------------------------------------------------------------------------
	243
	244	SC_TIME_HANDLER
	245
	246	#--------------------------------------------------------------------
	247	# Some systems (e.g., IRIX 4.0.5) lack the st_blksize field
	248	# in struct stat. But we might be able to use fstatfs instead.
	249	#--------------------------------------------------------------------
	250
	251	AC_STRUCT_ST_BLKSIZE
	252	AC_CHECK_FUNC(fstatfs, , [AC_DEFINE(NO_FSTATFS, 1, [Do we have fstatfs()?])])
	253
	254	#--------------------------------------------------------------------
	255	# Some system have no memcmp or it does not work with 8 bit
	256	# data, this checks it and add memcmp.o to LIBOBJS if needed
	257	#--------------------------------------------------------------------
	258
	259	AC_FUNC_MEMCMP
	260
	261	#--------------------------------------------------------------------
	262	# Some system like SunOS 4 and other BSD like systems
	263	# have no memmove (we assume they have bcopy instead).
	264	# {The replacement define is in compat/string.h}
	265	#--------------------------------------------------------------------
	266
	267	AC_CHECK_FUNC(memmove, , [
	268	AC_DEFINE(NO_MEMMOVE, 1, [Do we have memmove()?])
	269	AC_DEFINE(NO_STRING_H, 1, [Do we have <string.h>?]) ])
	270
	271	#--------------------------------------------------------------------
	272	# On some systems strstr is broken: it returns a pointer even
	273	# even if the original string is empty.
	274	#--------------------------------------------------------------------
	275
	276	SC_TCL_CHECK_BROKEN_FUNC(strstr, [
	277	extern int strstr();
	278	exit(strstr("\0test", "test") ? 1 : 0);
	279	])
	280
	281	#--------------------------------------------------------------------
	282	# Check for strtoul function. This is tricky because under some
	283	# versions of AIX strtoul returns an incorrect terminator
	284	# pointer for the string "0".
	285	#--------------------------------------------------------------------
	286
	287	SC_TCL_CHECK_BROKEN_FUNC(strtoul, [
	288	extern int strtoul();
	289	char term, string = "0";
	290	exit(strtoul(string,&term,0) != 0 \|\| term != string+1);
	291	])
	292
	293	#--------------------------------------------------------------------
	294	# Check for the strtod function. This is tricky because in some
	295	# versions of Linux strtod mis-parses strings starting with "+".
	296	#--------------------------------------------------------------------
	297
	298	SC_TCL_CHECK_BROKEN_FUNC(strtod, [
	299	extern double strtod();
	300	char term, string = " +69";
	301	exit(strtod(string,&term) != 69 \|\| term != string+4);
	302	])
	303
	304	#--------------------------------------------------------------------
	305	# Under Solaris 2.4, strtod returns the wrong value for the
	306	# terminating character under some conditions. Check for this
	307	# and if the problem exists use a substitute procedure
	308	# "fixstrtod" that corrects the error.
	309	#--------------------------------------------------------------------
	310
	311	SC_BUGGY_STRTOD
	312
	313	#--------------------------------------------------------------------
	314	# Check for various typedefs and provide substitutes if
	315	# they don't exist.
	316	#--------------------------------------------------------------------
	317
	318	AC_TYPE_MODE_T
	319	AC_TYPE_PID_T
	320	AC_TYPE_SIZE_T
	321	AC_TYPE_UID_T
	322
	323	AC_CACHE_CHECK([for socklen_t], tcl_cv_type_socklen_t, [
	324	AC_TRY_COMPILE([
	325	#include <sys/types.h>
	326	#include <sys/socket.h>
	327	],[
	328	socklen_t foo;
	329	],[tcl_cv_type_socklen_t=yes],[tcl_cv_type_socklen_t=no])])
	330	if test $tcl_cv_type_socklen_t = no; then
	331	AC_DEFINE(socklen_t, int, [Define as int if socklen_t is not available])
	332	fi
	333
	334	AC_CHECK_TYPE([intptr_t], [
	335	AC_DEFINE([HAVE_INTPTR_T], 1, [Do we have the intptr_t type?])], [
	336	AC_CACHE_CHECK([for pointer-size signed integer type], tcl_cv_intptr_t, [
	337	for tcl_cv_intptr_t in "int" "long" "long long" none; do
	338	if test "$tcl_cv_intptr_t" != none; then
	339	AC_COMPILE_IFELSE([AC_LANG_BOOL_COMPILE_TRY([AC_INCLUDES_DEFAULT],
	340	[[sizeof (void *) <= sizeof ($tcl_cv_intptr_t)]])],
	341	[tcl_ok=yes], [tcl_ok=no])
	342	test "$tcl_ok" = yes && break; fi
	343	done])
	344	if test "$tcl_cv_intptr_t" != none; then
	345	AC_DEFINE_UNQUOTED([intptr_t], [$tcl_cv_intptr_t], [Signed integer
	346	type wide enough to hold a pointer.])
	347	fi
	348	])
	349	AC_CHECK_TYPE([uintptr_t], [
	350	AC_DEFINE([HAVE_UINTPTR_T], 1, [Do we have the uintptr_t type?])], [
	351	AC_CACHE_CHECK([for pointer-size unsigned integer type], tcl_cv_uintptr_t, [
	352	for tcl_cv_uintptr_t in "unsigned int" "unsigned long" "unsigned long long" \
	353	none; do
	354	if test "$tcl_cv_uintptr_t" != none; then
	355	AC_COMPILE_IFELSE([AC_LANG_BOOL_COMPILE_TRY([AC_INCLUDES_DEFAULT],
	356	[[sizeof (void *) <= sizeof ($tcl_cv_uintptr_t)]])],
	357	[tcl_ok=yes], [tcl_ok=no])
	358	test "$tcl_ok" = yes && break; fi
	359	done])
	360	if test "$tcl_cv_uintptr_t" != none; then
	361	AC_DEFINE_UNQUOTED([uintptr_t], [$tcl_cv_uintptr_t], [Unsigned integer
	362	type wide enough to hold a pointer.])
	363	fi
	364	])
	365
	366	#--------------------------------------------------------------------
	367	# If a system doesn't have an opendir function (man, that's old!)
	368	# then we have to supply a different version of dirent.h which
	369	# is compatible with the substitute version of opendir that's
	370	# provided. This version only works with V7-style directories.
	371	#--------------------------------------------------------------------
	372
	373	AC_CHECK_FUNC(opendir, , [AC_DEFINE(USE_DIRENT2_H, 1, [May we include <dirent2.h>?])])
	374
	375	#--------------------------------------------------------------------
	376	# The check below checks whether <sys/wait.h> defines the type
	377	# "union wait" correctly. It's needed because of weirdness in
	378	# HP-UX where "union wait" is defined in both the BSD and SYS-V
	379	# environments. Checking the usability of WIFEXITED seems to do
	380	# the trick.
	381	#--------------------------------------------------------------------
	382
	383	AC_CACHE_CHECK([union wait], tcl_cv_union_wait, [
	384	AC_TRY_LINK([#include <sys/types.h>
	385	#include <sys/wait.h>], [
	386	union wait x;
	387	WIFEXITED(x); /* Generates compiler error if WIFEXITED
	388	* uses an int. */
	389	], tcl_cv_union_wait=yes, tcl_cv_union_wait=no)])
	390	if test $tcl_cv_union_wait = no; then
	391	AC_DEFINE(NO_UNION_WAIT, 1, [Do we have a usable 'union wait'?])
	392	fi
	393
	394	#--------------------------------------------------------------------
	395	# Check whether there is an strncasecmp function on this system.
	396	# This is a bit tricky because under SCO it's in -lsocket and
	397	# under Sequent Dynix it's in -linet.
	398	#--------------------------------------------------------------------
	399
	400	AC_CHECK_FUNC(strncasecmp, tcl_ok=1, tcl_ok=0)
	401	if test "$tcl_ok" = 0; then
	402	AC_CHECK_LIB(socket, strncasecmp, tcl_ok=1, tcl_ok=0)
	403	fi
	404	if test "$tcl_ok" = 0; then
	405	AC_CHECK_LIB(inet, strncasecmp, tcl_ok=1, tcl_ok=0)
	406	fi
	407	if test "$tcl_ok" = 0; then
	408	AC_LIBOBJ([strncasecmp])
	409	USE_COMPAT=1
	410	fi
	411
	412	#--------------------------------------------------------------------
	413	# The code below deals with several issues related to gettimeofday:
	414	# 1. Some systems don't provide a gettimeofday function at all
	415	# (set NO_GETTOD if this is the case).
	416	# 2. SGI systems don't use the BSD form of the gettimeofday function,
	417	# but they have a BSDgettimeofday function that can be used instead.
	418	# 3. See if gettimeofday is declared in the <sys/time.h> header file.
	419	# if not, set the GETTOD_NOT_DECLARED flag so that tclPort.h can
	420	# declare it.
	421	#--------------------------------------------------------------------
	422
	423	AC_CHECK_FUNC(BSDgettimeofday,
	424	[AC_DEFINE(HAVE_BSDGETTIMEOFDAY, 1, [Do we have BSDgettimeofday()?])], [
	425	AC_CHECK_FUNC(gettimeofday, , [AC_DEFINE(NO_GETTOD, 1, [Do we have gettimeofday()?])])
	426	])
	427	AC_CACHE_CHECK([for gettimeofday declaration], tcl_cv_grep_gettimeofday, [
	428	AC_EGREP_HEADER(gettimeofday, sys/time.h,
	429	tcl_cv_grep_gettimeofday=present, tcl_cv_grep_gettimeofday=missing)])
	430	if test $tcl_cv_grep_gettimeofday = missing ; then
	431	AC_DEFINE(GETTOD_NOT_DECLARED, 1, [Is gettimeofday() actually declared in <sys/time.h>?])
	432	fi
	433
	434	#--------------------------------------------------------------------
	435	# The following code checks to see whether it is possible to get
	436	# signed chars on this platform. This is needed in order to
	437	# properly generate sign-extended ints from character values.
	438	#--------------------------------------------------------------------
	439
	440	AC_C_CHAR_UNSIGNED
	441	AC_CACHE_CHECK([signed char declarations], tcl_cv_char_signed, [
	442	AC_TRY_COMPILE(, [
	443	signed char *p;
	444	p = 0;
	445	], tcl_cv_char_signed=yes, tcl_cv_char_signed=no)])
	446	if test $tcl_cv_char_signed = yes; then
	447	AC_DEFINE(HAVE_SIGNED_CHAR, 1, [Are characters signed?])
	448	fi
	449
	450	#--------------------------------------------------------------------
	451	# Does putenv() copy or not? We need to know to avoid memory leaks.
	452	#--------------------------------------------------------------------
	453
	454	AC_CACHE_CHECK([for a putenv() that copies the buffer], tcl_cv_putenv_copy, [
	455	AC_TRY_RUN([
	456	#include <stdlib.h>
	457	#define OURVAR "havecopy=yes"
	458	int main (int argc, char *argv[])
	459	{
	460	char foo, bar;
	461	foo = (char *)strdup(OURVAR);
	462	putenv(foo);
	463	strcpy((char *)(strchr(foo, '=') + 1), "no");
	464	bar = getenv("havecopy");
	465	if (!strcmp(bar, "no")) {
	466	/* doesnt copy */
	467	return 0;
	468	} else {
	469	/* does copy */
	470	return 1;
	471	}
	472	}
	473	],
	474	tcl_cv_putenv_copy=no,
	475	tcl_cv_putenv_copy=yes,
	476	tcl_cv_putenv_copy=no)])
	477	if test $tcl_cv_putenv_copy = yes; then
	478	AC_DEFINE(HAVE_PUTENV_THAT_COPIES, 1,
	479	[Does putenv() copy strings or incorporate them by reference?])
	480	fi
	481
	482	#--------------------------------------------------------------------
	483	# Check for support of nl_langinfo function
	484	#--------------------------------------------------------------------
	485
	486	SC_ENABLE_LANGINFO
	487
	488	#--------------------------------------------------------------------
	489	# Check for support of chflags function
	490	#--------------------------------------------------------------------
	491
	492	AC_CHECK_FUNCS(chflags)
	493
	494	#--------------------------------------------------------------------
	495	# Darwin specific API checks and defines
	496	#--------------------------------------------------------------------
	497
	498	if test "`uname -s`" = "Darwin" ; then
	499	AC_CHECK_FUNCS(getattrlist)
	500	AC_CHECK_HEADERS(copyfile.h)
	501	AC_CHECK_FUNCS(copyfile)
	502	if test $tcl_corefoundation = yes; then
	503	AC_CHECK_HEADERS(libkern/OSAtomic.h)
	504	AC_CHECK_FUNCS(OSSpinLockLock)
	505	AC_CHECK_FUNCS(pthread_atfork)
	506	fi
	507	AC_DEFINE(USE_VFORK, 1, [Should we use vfork() instead of fork()?])
	508	AC_DEFINE(TCL_DEFAULT_ENCODING, "utf-8",
	509	[Are we to override what our default encoding is?])
	510	AC_DEFINE(TCL_LOAD_FROM_MEMORY, 1,
	511	[Can this platform load code from memory?])
	512	AC_DEFINE(TCL_WIDE_CLICKS, 1,
	513	[Does this platform have wide high-resolution clicks?])
	514	AC_CHECK_HEADERS(AvailabilityMacros.h)
	515	if test "$ac_cv_header_AvailabilityMacros_h" = yes; then
	516	AC_CACHE_CHECK([if weak import is available], tcl_cv_cc_weak_import, [
	517	hold_cflags=$CFLAGS; CFLAGS="$CFLAGS -Werror"
	518	AC_TRY_LINK([
	519	#ifdef __ENVIRONMENT_MAC_OS_X_VERSION_MIN_REQUIRED__
	520	#if __ENVIRONMENT_MAC_OS_X_VERSION_MIN_REQUIRED__ < 1020
	521	#error __ENVIRONMENT_MAC_OS_X_VERSION_MIN_REQUIRED__ < 1020
	522	#endif
	523	#elif MAC_OS_X_VERSION_MIN_REQUIRED < 1020
	524	#error MAC_OS_X_VERSION_MIN_REQUIRED < 1020
	525	#endif
	526	int rand(void) __attribute__((weak_import));
	527	], [rand();],
	528	tcl_cv_cc_weak_import=yes, tcl_cv_cc_weak_import=no)
	529	CFLAGS=$hold_cflags])
	530	if test $tcl_cv_cc_weak_import = yes; then
	531	AC_DEFINE(HAVE_WEAK_IMPORT, 1, [Is weak import available?])
	532	fi
	533	fi
	534	# Build .bundle dltest binaries in addition to .dylib
	535	DLTEST_LD='${CC} -bundle -Wl,-w ${CFLAGS} ${LDFLAGS}'
	536	DLTEST_SUFFIX=".bundle"
	537	else
	538	DLTEST_LD='${SHLIB_LD}'
	539	DLTEST_SUFFIX=""
	540	fi
	541
	542	#--------------------------------------------------------------------
	543	# Check for support of fts functions (readdir replacement)
	544	#--------------------------------------------------------------------
	545
	546	AC_CACHE_CHECK([for fts], tcl_cv_api_fts, [
	547	AC_TRY_LINK([
	548	#include <sys/param.h>
	549	#include <sys/stat.h>
	550	#include <fts.h>
	551	], [
	552	char*const p[2] = {"/", NULL};
	553	FTS *f = fts_open(p, FTS_PHYSICAL\|FTS_NOCHDIR\|FTS_NOSTAT, NULL);
	554	FTSENT *e = fts_read(f); fts_close(f);
	555	], tcl_cv_api_fts=yes, tcl_cv_api_fts=no)])
	556	if test $tcl_cv_api_fts = yes; then
	557	AC_DEFINE(HAVE_FTS, 1, [Do we have fts functions?])
	558	fi
	559
	560	#--------------------------------------------------------------------
	561	# The statements below check for systems where POSIX-style
	562	# non-blocking I/O (O_NONBLOCK) doesn't work or is unimplemented.
	563	# On these systems (mostly older ones), use the old BSD-style
	564	# FIONBIO approach instead.
	565	#--------------------------------------------------------------------
	566
	567	SC_BLOCKING_STYLE
	568
	569	#------------------------------------------------------------------------
	570
	571	AC_MSG_CHECKING([whether to use dll unloading])
	572	AC_ARG_ENABLE(dll-unloading,
	573	AC_HELP_STRING([--enable-dll-unloading],
	574	[enable the 'unload' command (default: on)]),
	575	[tcl_ok=$enableval], [tcl_ok=yes])
	576	if test $tcl_ok = yes; then
	577	AC_DEFINE(TCL_UNLOAD_DLLS, 1, [Do we allow unloading of shared libraries?])
	578	fi
	579	AC_MSG_RESULT([$tcl_ok])
	580
	581	#------------------------------------------------------------------------
	582	# Check whether the timezone data is supplied by the OS or has
	583	# to be installed by Tcl. The default is autodetection, but can
	584	# be overriden on the configure command line either way.
	585	#------------------------------------------------------------------------
	586
	587	AC_MSG_CHECKING([for timezone data])
	588	AC_ARG_WITH(tzdata,
	589	AC_HELP_STRING([--with-tzdata],
	590	[install timezone data (default: autodetect)]),
	591	[tcl_ok=$withval], [tcl_ok=auto])
	592	#
	593	# Any directories that get added here must also be added to the
	594	# search path in ::tcl::clock::Initialize (library/clock.tcl).
	595	#
	596	case $tcl_ok in
	597	no)
	598	AC_MSG_RESULT([supplied by OS vendor])
	599	;;
	600	yes)
	601	# nothing to do here
	602	;;
	603	auto*)
	604	AC_CACHE_VAL([tcl_cv_dir_zoneinfo], [
	605	for dir in /usr/share/zoneinfo \
	606	/usr/share/lib/zoneinfo \
	607	/usr/lib/zoneinfo
	608	do
	609	if test -f $dir/UTC -o -f $dir/GMT
	610	then
	611	tcl_cv_dir_zoneinfo="$dir"
	612	break
	613	fi
	614	done])
	615	if test -n "$tcl_cv_dir_zoneinfo"; then
	616	tcl_ok=no
	617	AC_MSG_RESULT([$dir])
	618	else
	619	tcl_ok=yes
	620	fi
	621	;;
	622	*)
	623	AC_MSG_ERROR([invalid argument: $tcl_ok])
	624	;;
	625	esac
	626	if test $tcl_ok = yes
	627	then
	628	AC_MSG_RESULT([supplied by Tcl])
	629	INSTALL_TZDATA=install-tzdata
	630	fi
	631
	632	#--------------------------------------------------------------------
	633	# DTrace support
	634	#--------------------------------------------------------------------
	635
	636	AC_ARG_ENABLE(dtrace,
	637	AC_HELP_STRING([--enable-dtrace],
	638	[build with DTrace support (default: off)]),
	639	[tcl_ok=$enableval], [tcl_ok=no])
	640	if test $tcl_ok = yes; then
	641	AC_CHECK_HEADER(sys/sdt.h, [tcl_ok=yes], [tcl_ok=no])
	642	fi
	643	if test $tcl_ok = yes; then
	644	AC_PATH_PROG(DTRACE, dtrace,, [$PATH:/usr/sbin])
	645	test -z "$ac_cv_path_DTRACE" && tcl_ok=no
	646	fi
	647	AC_MSG_CHECKING([whether to enable DTrace support])
	648	if test $tcl_ok = yes; then
	649	AC_DEFINE(USE_DTRACE, 1, [Are we building with DTrace support?])
	650	DTRACE_SRC="\${DTRACE_SRC}"
	651	DTRACE_HDR="\${DTRACE_HDR}"
	652	if test "`uname -s`" != "Darwin" ; then
	653	DTRACE_OBJ="\${DTRACE_OBJ}"
	654	fi
	655	fi
	656	AC_MSG_RESULT([$tcl_ok])
	657
	658	#--------------------------------------------------------------------
	659	# Does the C stack grow upwards or downwards? Or cross-compiling?
	660	#--------------------------------------------------------------------
	661
	662	AC_CACHE_CHECK([if the C stack grows upwards in memory], tcl_cv_stack_grows_up, [
	663	AC_TRY_RUN([
	664	int StackGrowsUp(int *parent) {
	665	int here;
	666	return (&here < parent);
	667	}
	668	int main (int argc, char *argv[]) {
	669	int foo;
	670	return StackGrowsUp(&foo);
	671	}
	672	], tcl_cv_stack_grows_up=yes, tcl_cv_stack_grows_up=no,
	673	tcl_cv_stack_grows_up=unknown)])
	674	if test $tcl_cv_stack_grows_up = unknown; then
	675	AC_DEFINE(TCL_CROSS_COMPILE, 1, [Are we cross-compiling?])
	676	elif test $tcl_cv_stack_grows_up = yes; then
	677	AC_DEFINE(TCL_STACK_GROWS_UP, 1, [The C stack grows upwards in memory.])
	678	fi
	679
	680	#--------------------------------------------------------------------
	681	# The statements below define a collection of symbols related to
	682	# building libtcl as a shared library instead of a static library.
	683	#--------------------------------------------------------------------
	684
	685	TCL_UNSHARED_LIB_SUFFIX=${UNSHARED_LIB_SUFFIX}
	686	TCL_SHARED_LIB_SUFFIX=${SHARED_LIB_SUFFIX}
	687	eval "TCL_LIB_FILE=libtcl${LIB_SUFFIX}"
	688
	689	# tclConfig.sh needs a version of the _LIB_SUFFIX that has been eval'ed
	690	# since on some platforms TCL_LIB_FILE contains shell escapes.
	691	# (See also: TCL_TRIM_DOTS).
	692
	693	eval "TCL_LIB_FILE=${TCL_LIB_FILE}"
	694
	695	TCL_LIBRARY='$(prefix)/lib/tcl$(VERSION)'
	696	PRIVATE_INCLUDE_DIR='$(includedir)'
	697	HTML_DIR='$(DISTDIR)/html'
	698
	699	# Note: in the following variable, it's important to use the absolute
	700	# path name of the Tcl directory rather than "..": this is because
	701	# AIX remembers this path and will attempt to use it at run-time to look
	702	# up the Tcl library.
	703
	704	if test "`uname -s`" = "Darwin" ; then
	705	SC_ENABLE_FRAMEWORK
	706	TCL_SHLIB_LD_EXTRAS="-compatibility_version ${TCL_VERSION} -current_version ${TCL_VERSION}`echo ${TCL_PATCH_LEVEL} \| awk ['{match($0, "\\\.[0-9]+"); print substr($0,RSTART,RLENGTH)}']`"
	707	TCL_SHLIB_LD_EXTRAS="${TCL_SHLIB_LD_EXTRAS}"' -install_name "${DYLIB_INSTALL_DIR}"/${TCL_LIB_FILE}'
	708	echo "$LDFLAGS " \| grep -q -- '-prebind ' && TCL_SHLIB_LD_EXTRAS="${TCL_SHLIB_LD_EXTRAS}"' -seg1addr 0xa000000'
	709	TCL_SHLIB_LD_EXTRAS="${TCL_SHLIB_LD_EXTRAS}"' -sectcreate __TEXT __info_plist Tcl-Info.plist'
	710	EXTRA_TCLSH_LIBS='-sectcreate __TEXT __info_plist Tclsh-Info.plist'
	711	EXTRA_APP_CC_SWITCHES='-mdynamic-no-pic'
	712	AC_CONFIG_FILES([Tcl-Info.plist:../macosx/Tcl-Info.plist.in Tclsh-Info.plist:../macosx/Tclsh-Info.plist.in])
	713	TCL_YEAR="`date +%Y`"
	714	fi
	715
	716	if test "$FRAMEWORK_BUILD" = "1" ; then
	717	AC_DEFINE(TCL_FRAMEWORK, 1, [Is Tcl built as a framework?])
	718	# Construct a fake local framework structure to make linking with
	719	# '-framework Tcl' and running of tcltest work
	720	AC_CONFIG_COMMANDS([Tcl.framework], [n=Tcl &&
	721	f=$n.framework && v=Versions/$VERSION &&
	722	rm -rf $f && mkdir -p $f/$v/Resources &&
	723	ln -s $v/$n $v/Resources $f && ln -s ../../../$n $f/$v &&
	724	ln -s ../../../../$n-Info.plist $f/$v/Resources/Info.plist &&
	725	unset n f v
	726	], VERSION=${TCL_VERSION})
	727	LD_LIBRARY_PATH_VAR="DYLD_FRAMEWORK_PATH"
	728	if test "${libdir}" = '${exec_prefix}/lib'; then
	729	# override libdir default
	730	libdir="/Library/Frameworks"
	731	fi
	732	TCL_LIB_FILE="Tcl"
	733	TCL_LIB_FLAG="-framework Tcl"
	734	TCL_BUILD_LIB_SPEC="-F`pwd \| sed -e 's/ /\\\\ /g'` -framework Tcl"
	735	TCL_LIB_SPEC="-F${libdir} -framework Tcl"
	736	libdir="${libdir}/Tcl.framework/Versions/\${VERSION}"
	737	TCL_LIBRARY="${libdir}/Resources/Scripts"
	738	includedir="${libdir}/Headers"
	739	PRIVATE_INCLUDE_DIR="${libdir}/PrivateHeaders"
	740	HTML_DIR="${libdir}/Resources/Documentation/Reference/Tcl"
	741	EXTRA_INSTALL="install-private-headers html-tcl"
	742	EXTRA_BUILD_HTML='@ln -fs contents.htm "$(HTML_INSTALL_DIR)"/TclTOC.html'
	743	EXTRA_INSTALL_BINARIES='@echo "Installing Info.plist to $(LIB_INSTALL_DIR)/Resources" && mkdir -p "$(LIB_INSTALL_DIR)/Resources" && $(INSTALL_DATA) Tcl-Info.plist "$(LIB_INSTALL_DIR)/Resources/Info.plist"'
	744	EXTRA_INSTALL_BINARIES="$EXTRA_INSTALL_BINARIES"' && echo "Installing license.terms to $(LIB_INSTALL_DIR)/Resources" && $(INSTALL_DATA) "$(TOP_DIR)/license.terms" "$(LIB_INSTALL_DIR)/Resources"'
	745	EXTRA_INSTALL_BINARIES="$EXTRA_INSTALL_BINARIES"' && echo "Finalizing Tcl.framework" && rm -f "$(LIB_INSTALL_DIR)/../Current" && ln -s "$(VERSION)" "$(LIB_INSTALL_DIR)/../Current" && for f in "$(LIB_FILE)" tclConfig.sh Resources Headers PrivateHeaders; do rm -f "$(LIB_INSTALL_DIR)/../../$$f" && ln -s "Versions/Current/$$f" "$(LIB_INSTALL_DIR)/../.."; done && f="$(STUB_LIB_FILE)" && rm -f "$(LIB_INSTALL_DIR)/../../$$f" && ln -s "Versions/$(VERSION)/$$f" "$(LIB_INSTALL_DIR)/../.."'
	746	# Don't use AC_DEFINE for the following as the framework version define
	747	# needs to go into the Makefile even when using autoheader, so that we
	748	# can pick up a potential make override of VERSION. Also, don't put this
	749	# into CFLAGS as it should not go into tclConfig.sh
	750	EXTRA_CC_SWITCHES='-DTCL_FRAMEWORK_VERSION=\"$(VERSION)\"'
	751	else
	752	# libdir must be a fully qualified path and not ${exec_prefix}/lib
	753	eval libdir="$libdir"
	754	if test "$SHARED_BUILD" = "0" \|\| test "$TCL_NEEDS_EXP_FILE" = "0"; then
	755	if test "${TCL_LIB_VERSIONS_OK}" = "ok"; then
	756	TCL_LIB_FLAG="-ltcl${TCL_VERSION}"
	757	else
	758	TCL_LIB_FLAG="-ltcl`echo ${TCL_VERSION} \| tr -d .`"
	759	fi
	760	TCL_BUILD_LIB_SPEC="-L`pwd \| sed -e 's/ /\\\\ /g'` ${TCL_LIB_FLAG}"
	761	TCL_LIB_SPEC="-L${libdir} ${TCL_LIB_FLAG}"
	762	else
	763	TCL_BUILD_EXP_FILE="lib.exp"
	764	eval "TCL_EXP_FILE=libtcl${TCL_EXPORT_FILE_SUFFIX}"
	765
	766	if test "$GCC" = "yes" ; then
	767	TCL_BUILD_LIB_SPEC="-Wl,-bI:`pwd \| sed -e 's/ /\\\\ /g'`/${TCL_BUILD_EXP_FILE} -L`pwd \| sed -e 's/ /\\\\ /g'`"
	768	TCL_LIB_SPEC="-Wl,-bI:${libdir}/${TCL_EXP_FILE} -L${libdir}"
	769	else
	770	TCL_BUILD_LIB_SPEC="-bI:`pwd \| sed -e 's/ /\\\\ /g'`/${TCL_BUILD_EXP_FILE}"
	771	TCL_LIB_SPEC="-bI:${libdir}/${TCL_EXP_FILE}"
	772	fi
	773	fi
	774	fi
	775	VERSION='${VERSION}'
	776	eval "CFG_TCL_SHARED_LIB_SUFFIX=${TCL_SHARED_LIB_SUFFIX}"
	777	eval "CFG_TCL_UNSHARED_LIB_SUFFIX=${TCL_UNSHARED_LIB_SUFFIX}"
	778	eval "CFG_TCL_EXPORT_FILE_SUFFIX=${TCL_EXPORT_FILE_SUFFIX}"
	779	VERSION=${TCL_VERSION}
	780
	781	#--------------------------------------------------------------------
	782	# The statements below define the symbol TCL_PACKAGE_PATH, which
	783	# gives a list of directories that may contain packages. The list
	784	# consists of one directory for machine-dependent binaries and
	785	# another for platform-independent scripts.
	786	#--------------------------------------------------------------------
	787
	788	if test "$FRAMEWORK_BUILD" = "1" ; then
	789	test -z "$TCL_PACKAGE_PATH" && \
	790	TCL_PACKAGE_PATH="~/Library/Tcl /Library/Tcl /Network/Library/Tcl /System/Library/Tcl ~/Library/Frameworks /Library/Frameworks /Network/Library/Frameworks /System/Library/Frameworks"
	791	test -z "$TCL_MODULE_PATH" && \
	792	TCL_MODULE_PATH="~/Library/Tcl /Library/Tcl /Network/Library/Tcl /System/Library/Tcl"
	793	elif test "$prefix/lib" != "$libdir"; then
	794	TCL_PACKAGE_PATH="${libdir} ${prefix}/lib ${TCL_PACKAGE_PATH}"
	795	else
	796	TCL_PACKAGE_PATH="${prefix}/lib ${TCL_PACKAGE_PATH}"
	797	fi
	798
	799	#--------------------------------------------------------------------
	800	# The statements below define various symbols relating to Tcl
	801	# stub support.
	802	#--------------------------------------------------------------------
	803
	804	# Replace ${VERSION} with contents of ${TCL_VERSION}
	805	# double-eval to account for TCL_TRIM_DOTS.
	806	#
	807	eval "TCL_STUB_LIB_FILE=libtclstub${TCL_UNSHARED_LIB_SUFFIX}"
	808	eval "TCL_STUB_LIB_FILE=\"${TCL_STUB_LIB_FILE}\""
	809	eval "TCL_STUB_LIB_DIR=${libdir}"
	810
	811	if test "${TCL_LIB_VERSIONS_OK}" = "ok"; then
	812	TCL_STUB_LIB_FLAG="-ltclstub${TCL_VERSION}"
	813	else
	814	TCL_STUB_LIB_FLAG="-ltclstub`echo ${TCL_VERSION} \| tr -d .`"
	815	fi
	816
	817	TCL_BUILD_STUB_LIB_SPEC="-L`pwd \| sed -e 's/ /\\\\ /g'` ${TCL_STUB_LIB_FLAG}"
	818	TCL_STUB_LIB_SPEC="-L${TCL_STUB_LIB_DIR} ${TCL_STUB_LIB_FLAG}"
	819	TCL_BUILD_STUB_LIB_PATH="`pwd`/${TCL_STUB_LIB_FILE}"
	820	TCL_STUB_LIB_PATH="${TCL_STUB_LIB_DIR}/${TCL_STUB_LIB_FILE}"
	821
	822	# Install time header dir can be set via --includedir
	823	eval "TCL_INCLUDE_SPEC=\"-I${includedir}\""
	824
	825	#------------------------------------------------------------------------
	826	# tclConfig.sh refers to this by a different name
	827	#------------------------------------------------------------------------
	828
	829	TCL_SHARED_BUILD=${SHARED_BUILD}
	830
	831	AC_SUBST(TCL_VERSION)
	832	AC_SUBST(TCL_MAJOR_VERSION)
	833	AC_SUBST(TCL_MINOR_VERSION)
	834	AC_SUBST(TCL_PATCH_LEVEL)
	835	AC_SUBST(TCL_YEAR)
	836
	837	AC_SUBST(TCL_LIB_FILE)
	838	AC_SUBST(TCL_LIB_FLAG)
	839	AC_SUBST(TCL_LIB_SPEC)
	840	AC_SUBST(TCL_STUB_LIB_FILE)
	841	AC_SUBST(TCL_STUB_LIB_FLAG)
	842	AC_SUBST(TCL_STUB_LIB_SPEC)
	843	AC_SUBST(TCL_STUB_LIB_PATH)
	844	AC_SUBST(TCL_INCLUDE_SPEC)
	845	AC_SUBST(TCL_BUILD_STUB_LIB_SPEC)
	846	AC_SUBST(TCL_BUILD_STUB_LIB_PATH)
	847
	848	AC_SUBST(TCL_SRC_DIR)
	849	AC_SUBST(CFG_TCL_SHARED_LIB_SUFFIX)
	850	AC_SUBST(CFG_TCL_UNSHARED_LIB_SUFFIX)
	851	AC_SUBST(CFG_TCL_EXPORT_FILE_SUFFIX)
	852
	853	AC_SUBST(TCL_SHARED_BUILD)
	854	AC_SUBST(LD_LIBRARY_PATH_VAR)
	855
	856	AC_SUBST(TCL_BUILD_LIB_SPEC)
	857	AC_SUBST(TCL_NEEDS_EXP_FILE)
	858	AC_SUBST(TCL_BUILD_EXP_FILE)
	859	AC_SUBST(TCL_EXP_FILE)
	860
	861	AC_SUBST(TCL_LIB_VERSIONS_OK)
	862	AC_SUBST(TCL_SHARED_LIB_SUFFIX)
	863	AC_SUBST(TCL_UNSHARED_LIB_SUFFIX)
	864
	865	AC_SUBST(TCL_HAS_LONGLONG)
	866
	867	AC_SUBST(INSTALL_TZDATA)
	868
	869	AC_SUBST(DTRACE_SRC)
	870	AC_SUBST(DTRACE_HDR)
	871	AC_SUBST(DTRACE_OBJ)
	872
	873	AC_SUBST(BUILD_DLTEST)
	874	AC_SUBST(TCL_PACKAGE_PATH)
	875	AC_SUBST(TCL_MODULE_PATH)
	876
	877	AC_SUBST(TCL_LIBRARY)
	878	AC_SUBST(PRIVATE_INCLUDE_DIR)
	879	AC_SUBST(HTML_DIR)
	880
	881	AC_SUBST(EXTRA_CC_SWITCHES)
	882	AC_SUBST(EXTRA_APP_CC_SWITCHES)
	883	AC_SUBST(EXTRA_INSTALL)
	884	AC_SUBST(EXTRA_INSTALL_BINARIES)
	885	AC_SUBST(EXTRA_BUILD_HTML)
	886	AC_SUBST(EXTRA_TCLSH_LIBS)
	887
	888	AC_SUBST(DLTEST_LD)
	889	AC_SUBST(DLTEST_SUFFIX)
	890
	891	dnl Disable the automake-friendly normalization of LIBOBJS
	892	dnl performed by autoconf 2.53 and later. It's not correct for us.
	893	define([_AC_LIBOBJS_NORMALIZE],[])
	894	AC_CONFIG_FILES([
	895	Makefile:../unix/Makefile.in
	896	dltest/Makefile:../unix/dltest/Makefile.in
	897	tclConfig.sh:../unix/tclConfig.sh.in
	898	])
	899	AC_OUTPUT

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