configure.in -> configure.ac

1 files changed, 998 insertions, 0 deletions

diff --git a/unix/configure.ac b/unix/configure.ac
new file mode 100644
index 0000000..41a1f62
--- /dev/null
+++ b/unix/configure.ac
@@ -0,0 +1,998 @@
+#! /bin/bash -norc
+dnl	This file is an input file used by the GNU "autoconf" program to
+dnl	generate the file "configure", which is run during Tcl installation
+dnl	to configure the system for the local environment.
+
+AC_INIT([tcl],[8.7])
+AC_PREREQ(2.69)
+
+dnl This is only used when included from macosx/configure.ac
+m4_ifdef([SC_USE_CONFIG_HEADERS], [
+    AC_CONFIG_HEADERS([tclConfig.h:../unix/tclConfig.h.in])
+    AC_CONFIG_COMMANDS_PRE([DEFS="-DHAVE_TCL_CONFIG_H  -imacros tclConfig.h"])
+    AH_TOP([
+    #ifndef _TCLCONFIG
+    #define _TCLCONFIG])
+    AH_BOTTOM([
+    /* Undef unused package specific autoheader defines so that we can
+     * include both tclConfig.h and tkConfig.h at the same time: */
+    /* override */ #undef PACKAGE_NAME
+    /* override */ #undef PACKAGE_STRING
+    /* override */ #undef PACKAGE_TARNAME
+    #endif /* _TCLCONFIG */])
+])
+
+TCL_VERSION=8.7
+TCL_MAJOR_VERSION=8
+TCL_MINOR_VERSION=7
+TCL_PATCH_LEVEL="a0"
+VERSION=${TCL_VERSION}
+
+EXTRA_INSTALL_BINARIES=${EXTRA_INSTALL_BINARIES:-"@:"}
+EXTRA_BUILD_HTML=${EXTRA_BUILD_HTML:-"@:"}
+
+#------------------------------------------------------------------------
+# Setup configure arguments for bundled packages
+#------------------------------------------------------------------------
+
+PKG_CFG_ARGS="$ac_configure_args ${PKG_CFG_ARGS}"
+
+if test -r "$cache_file" -a -f "$cache_file"; then
+    case $cache_file in
+	[[\\/]]* | ?:[[\\/]]* ) pkg_cache_file=$cache_file ;;
+	*) pkg_cache_file=../../$cache_file ;;
+    esac
+    PKG_CFG_ARGS="${PKG_CFG_ARGS} --cache-file=$pkg_cache_file"
+fi
+
+#------------------------------------------------------------------------
+# Empty slate for bundled packages, to avoid stale configuration
+#------------------------------------------------------------------------
+#rm -Rf pkgs
+if test -f Makefile; then
+    make distclean-packages
+fi
+
+#------------------------------------------------------------------------
+# Handle the --prefix=... option
+#------------------------------------------------------------------------
+
+if test "${prefix}" = "NONE"; then
+    prefix=/usr/local
+fi
+if test "${exec_prefix}" = "NONE"; then
+    exec_prefix=$prefix
+fi
+# Make sure srcdir is fully qualified!
+srcdir="`cd "$srcdir" ; pwd`"
+TCL_SRC_DIR="`cd "$srcdir"/..; pwd`"
+
+#------------------------------------------------------------------------
+# Compress and/or soft link the manpages?
+#------------------------------------------------------------------------
+
+SC_CONFIG_MANPAGES
+
+#------------------------------------------------------------------------
+# Standard compiler checks
+#------------------------------------------------------------------------
+
+# If the user did not set CFLAGS, set it now to keep
+# the AC_PROG_CC macro from adding "-g -O2".
+if test "${CFLAGS+set}" != "set" ; then
+    CFLAGS=""
+fi
+
+AC_PROG_CC
+AC_C_INLINE
+
+#--------------------------------------------------------------------
+# Supply substitutes for missing POSIX header files.  Special notes:
+#	- stdlib.h doesn't define strtol, strtoul, or
+#	  strtod insome versions of SunOS
+#	- some versions of string.h don't declare procedures such
+#	  as strstr
+# Do this early, otherwise an autoconf bug throws errors on configure
+#--------------------------------------------------------------------
+
+SC_MISSING_POSIX_HEADERS
+
+#--------------------------------------------------------------------
+# Determines the correct executable file extension (.exe)
+#--------------------------------------------------------------------
+
+AC_EXEEXT
+
+#------------------------------------------------------------------------
+# If we're using GCC, see if the compiler understands -pipe.  If so, use it.
+# It makes compiling go faster.  (This is only a performance feature.)
+#------------------------------------------------------------------------
+
+if test -z "$no_pipe" && test -n "$GCC"; then
+    AC_CACHE_CHECK([if the compiler understands -pipe],
+	tcl_cv_cc_pipe, [
+	hold_cflags=$CFLAGS; CFLAGS="$CFLAGS -pipe"
+	AC_TRY_COMPILE(,, tcl_cv_cc_pipe=yes, tcl_cv_cc_pipe=no)
+	CFLAGS=$hold_cflags])
+    if test $tcl_cv_cc_pipe = yes; then
+	CFLAGS="$CFLAGS -pipe"
+    fi
+fi
+
+#------------------------------------------------------------------------
+# Threads support
+#------------------------------------------------------------------------
+
+SC_ENABLE_THREADS
+
+#------------------------------------------------------------------------
+# Embedded configuration information, encoding to use for the values, TIP #59
+#------------------------------------------------------------------------
+
+SC_TCL_CFG_ENCODING
+
+#--------------------------------------------------------------------
+# Look for libraries that we will need when compiling the Tcl shell
+#--------------------------------------------------------------------
+
+SC_TCL_LINK_LIBS
+
+# Add the threads support libraries
+LIBS="$LIBS$THREADS_LIBS"
+
+SC_ENABLE_SHARED
+
+#--------------------------------------------------------------------
+# Look for a native installed tclsh binary (if available)
+# If one cannot be found then use the binary we build (fails for
+# cross compiling). This is used for NATIVE_TCLSH in Makefile.
+#--------------------------------------------------------------------
+
+SC_PROG_TCLSH
+if test "$TCLSH_PROG" = ""; then
+  TCLSH_PROG='./${TCL_EXE}'
+fi
+
+#------------------------------------------------------------------------
+#	Add stuff for zlib
+#------------------------------------------------------------------------
+
+zlib_ok=yes
+AC_CHECK_HEADER([zlib.h],[
+  AC_CHECK_TYPE([gz_header],[],[zlib_ok=no],[#include <zlib.h>])],[
+  zlib_ok=no])
+AS_IF([test $zlib_ok = yes], [
+  AC_SEARCH_LIBS([deflateSetHeader],[z],[],[
+    zlib_ok=no
+  ])])
+AS_IF([test $zlib_ok = no], [
+  AC_SUBST(ZLIB_OBJS,[\${ZLIB_OBJS}])
+  AC_SUBST(ZLIB_SRCS,[\${ZLIB_SRCS}])
+  AC_SUBST(ZLIB_INCLUDE,[-I\${ZLIB_DIR}])
+])
+AC_DEFINE(HAVE_ZLIB, 1, [Is there an installed zlib?])
+
+#--------------------------------------------------------------------
+# The statements below define a collection of compile flags.  This
+# macro depends on the value of SHARED_BUILD, and should be called
+# after SC_ENABLE_SHARED checks the configure switches.
+#--------------------------------------------------------------------
+
+SC_CONFIG_CFLAGS
+
+SC_ENABLE_SYMBOLS(bccdebug)
+
+AC_DEFINE(TCL_TOMMATH, 1, [Build libtommath?])
+AC_DEFINE(MP_PREC, 4, [Default libtommath precision.])
+
+#--------------------------------------------------------------------
+#	Detect what compiler flags to set for 64-bit support.
+#--------------------------------------------------------------------
+
+SC_TCL_EARLY_FLAGS
+
+SC_TCL_64BIT_FLAGS
+
+#--------------------------------------------------------------------
+#	Check endianness because we can optimize comparisons of
+#	Tcl_UniChar strings to memcmp on big-endian systems.
+#--------------------------------------------------------------------
+
+AC_C_BIGENDIAN
+
+#--------------------------------------------------------------------
+#	Supply substitutes for missing POSIX library procedures, or
+#	set flags so Tcl uses alternate procedures.
+#--------------------------------------------------------------------
+
+# Check if Posix compliant getcwd exists, if not we'll use getwd.
+AC_CHECK_FUNCS(getcwd, , [AC_DEFINE(USEGETWD, 1, [Is getcwd Posix-compliant?])])
+# Nb: if getcwd uses popen and pwd(1) (like SunOS 4) we should really
+# define USEGETWD even if the posix getcwd exists. Add a test ?
+
+AC_REPLACE_FUNCS(mkstemp opendir strtol waitpid)
+AC_CHECK_FUNC(strerror, , [AC_DEFINE(NO_STRERROR, 1, [Do we have strerror()])])
+AC_CHECK_FUNC(getwd, , [AC_DEFINE(NO_GETWD, 1, [Do we have getwd()])])
+AC_CHECK_FUNC(wait3, , [AC_DEFINE(NO_WAIT3, 1, [Do we have wait3()])])
+AC_CHECK_FUNC(uname, , [AC_DEFINE(NO_UNAME, 1, [Do we have uname()])])
+
+if test "`uname -s`" = "Darwin" && test "${TCL_THREADS}" = 1 && \
+	test "`uname -r | awk -F. '{print [$]1}'`" -lt 7; then
+    # prior to Darwin 7, realpath is not threadsafe, so don't
+    # use it when threads are enabled, c.f. bug # 711232
+    ac_cv_func_realpath=no
+fi
+AC_CHECK_FUNC(realpath, , [AC_DEFINE(NO_REALPATH, 1, [Do we have realpath()])])
+
+SC_TCL_IPV6
+
+#--------------------------------------------------------------------
+#	Look for thread-safe variants of some library functions.
+#--------------------------------------------------------------------
+
+if test "${TCL_THREADS}" = 1; then
+    SC_TCL_GETPWUID_R
+    SC_TCL_GETPWNAM_R
+    SC_TCL_GETGRGID_R
+    SC_TCL_GETGRNAM_R
+    if test "`uname -s`" = "Darwin" && \
+	    test "`uname -r | awk -F. '{print [$]1}'`" -gt 5; then
+	# Starting with Darwin 6 (Mac OSX 10.2), gethostbyX
+	# are actually MT-safe as they always return pointers
+	# from TSD instead of static storage.
+	AC_DEFINE(HAVE_MTSAFE_GETHOSTBYNAME, 1,
+		[Do we have MT-safe gethostbyname() ?])
+	AC_DEFINE(HAVE_MTSAFE_GETHOSTBYADDR, 1,
+		[Do we have MT-safe gethostbyaddr() ?])
+
+    elif test "`uname -s`" = "HP-UX" && \
+	      test "`uname -r|sed -e 's|B\.||' -e 's|\..*$||'`" -gt 10; then
+        # Starting with HPUX 11.00 (we believe), gethostbyX
+        # are actually MT-safe as they always return pointers
+	# from TSD instead of static storage.
+	AC_DEFINE(HAVE_MTSAFE_GETHOSTBYNAME, 1,
+		[Do we have MT-safe gethostbyname() ?])
+	AC_DEFINE(HAVE_MTSAFE_GETHOSTBYADDR, 1,
+		[Do we have MT-safe gethostbyaddr() ?])
+
+    else
+	SC_TCL_GETHOSTBYNAME_R
+	SC_TCL_GETHOSTBYADDR_R
+    fi
+fi
+
+#---------------------------------------------------------------------------
+#	Check for serial port interface.
+#
+#	termios.h is present on all POSIX systems.
+#	sys/ioctl.h is almost always present, though what it contains
+#	is system-specific.
+#	sys/modem.h is needed on HP-UX.
+#---------------------------------------------------------------------------
+
+AC_CHECK_HEADERS(termios.h)
+AC_CHECK_HEADERS(sys/ioctl.h)
+AC_CHECK_HEADERS(sys/modem.h)
+
+#--------------------------------------------------------------------
+#	Include sys/select.h if it exists and if it supplies things
+#	that appear to be useful and aren't already in sys/types.h.
+#	This appears to be true only on the RS/6000 under AIX.  Some
+#	systems like OSF/1 have a sys/select.h that's of no use, and
+#	other systems like SCO UNIX have a sys/select.h that's
+#	pernicious.  If "fd_set" isn't defined anywhere then set a
+#	special flag.
+#--------------------------------------------------------------------
+
+AC_CACHE_CHECK([for fd_set in sys/types], tcl_cv_type_fd_set, [
+    AC_TRY_COMPILE([#include <sys/types.h>],[fd_set readMask, writeMask;],
+	tcl_cv_type_fd_set=yes, tcl_cv_type_fd_set=no)])
+tcl_ok=$tcl_cv_type_fd_set
+if test $tcl_ok = no; then
+    AC_CACHE_CHECK([for fd_mask in sys/select], tcl_cv_grep_fd_mask, [
+	AC_EGREP_HEADER(fd_mask, sys/select.h,
+	     tcl_cv_grep_fd_mask=present, tcl_cv_grep_fd_mask=missing)])
+    if test $tcl_cv_grep_fd_mask = present; then
+	AC_DEFINE(HAVE_SYS_SELECT_H, 1, [Should we include <sys/select.h>?])
+	tcl_ok=yes
+    fi
+fi
+if test $tcl_ok = no; then
+    AC_DEFINE(NO_FD_SET, 1, [Do we have fd_set?])
+fi
+
+#------------------------------------------------------------------------------
+#       Find out all about time handling differences.
+#------------------------------------------------------------------------------
+
+SC_TIME_HANDLER
+
+#--------------------------------------------------------------------
+#	Some systems (e.g., IRIX 4.0.5) lack some fields in struct stat. But
+#	we might be able to use fstatfs instead. Some systems (OpenBSD?) also
+#	lack blkcnt_t.
+#--------------------------------------------------------------------
+
+if test "$ac_cv_cygwin" != "yes"; then
+    AC_CHECK_MEMBERS([struct stat.st_blocks, struct stat.st_blksize])
+fi
+AC_CHECK_TYPES([blkcnt_t])
+AC_CHECK_FUNC(fstatfs, , [AC_DEFINE(NO_FSTATFS, 1, [Do we have fstatfs()?])])
+
+#--------------------------------------------------------------------
+#       Some system have no memcmp or it does not work with 8 bit data, this
+#       checks it and add memcmp.o to LIBOBJS if needed
+#--------------------------------------------------------------------
+
+AC_FUNC_MEMCMP
+
+#--------------------------------------------------------------------
+#       Some system like SunOS 4 and other BSD like systems have no memmove
+#       (we assume they have bcopy instead). {The replacement define is in
+#       compat/string.h}
+#--------------------------------------------------------------------
+
+AC_CHECK_FUNC(memmove, , [
+    AC_DEFINE(NO_MEMMOVE, 1, [Do we have memmove()?])
+    AC_DEFINE(NO_STRING_H, 1, [Do we have <string.h>?]) ])
+
+#--------------------------------------------------------------------
+#	On some systems strstr is broken: it returns a pointer even even if
+#	the original string is empty.
+#--------------------------------------------------------------------
+
+SC_TCL_CHECK_BROKEN_FUNC(strstr, [
+    extern int strstr();
+    exit(strstr("\0test", "test") ? 1 : 0);
+])
+
+#--------------------------------------------------------------------
+#	Check for strtoul function.  This is tricky because under some
+#	versions of AIX strtoul returns an incorrect terminator
+#	pointer for the string "0".
+#--------------------------------------------------------------------
+
+SC_TCL_CHECK_BROKEN_FUNC(strtoul, [
+    extern int strtoul();
+    char *term, *string = "0";
+    exit(strtoul(string,&term,0) != 0 || term != string+1);
+])
+
+#--------------------------------------------------------------------
+#	Check for the strtod function.  This is tricky because in some
+#	versions of Linux strtod mis-parses strings starting with "+".
+#--------------------------------------------------------------------
+
+SC_TCL_CHECK_BROKEN_FUNC(strtod, [
+    extern double strtod();
+    char *term, *string = " +69";
+    exit(strtod(string,&term) != 69 || term != string+4);
+])
+
+#--------------------------------------------------------------------
+#	Under Solaris 2.4, strtod returns the wrong value for the
+#	terminating character under some conditions.  Check for this
+#	and if the problem exists use a substitute procedure
+#	"fixstrtod" that corrects the error.
+#--------------------------------------------------------------------
+
+SC_BUGGY_STRTOD
+
+#--------------------------------------------------------------------
+#	Check for various typedefs and provide substitutes if
+#	they don't exist.
+#--------------------------------------------------------------------
+
+AC_TYPE_MODE_T
+AC_TYPE_PID_T
+AC_TYPE_SIZE_T
+AC_TYPE_UID_T
+
+AC_CACHE_CHECK([for socklen_t], tcl_cv_type_socklen_t, [
+    AC_TRY_COMPILE([
+	#include <sys/types.h>
+	#include <sys/socket.h>
+    ],[
+    	socklen_t foo;
+    ],[tcl_cv_type_socklen_t=yes],[tcl_cv_type_socklen_t=no])])
+if test $tcl_cv_type_socklen_t = no; then
+    AC_DEFINE(socklen_t, int, [Define as int if socklen_t is not available])
+fi
+
+AC_CHECK_TYPE([intptr_t], [
+    AC_DEFINE([HAVE_INTPTR_T], 1, [Do we have the intptr_t type?])], [
+    AC_CACHE_CHECK([for pointer-size signed integer type], tcl_cv_intptr_t, [
+    for tcl_cv_intptr_t in "int" "long" "long long" none; do
+	if test "$tcl_cv_intptr_t" != none; then
+	    AC_COMPILE_IFELSE([AC_LANG_BOOL_COMPILE_TRY([AC_INCLUDES_DEFAULT],
+		    [[sizeof (void *) <= sizeof ($tcl_cv_intptr_t)]])],
+		[tcl_ok=yes], [tcl_ok=no])
+	    test "$tcl_ok" = yes && break; fi
+    done])
+    if test "$tcl_cv_intptr_t" != none; then
+	AC_DEFINE_UNQUOTED([intptr_t], [$tcl_cv_intptr_t], [Signed integer
+	   type wide enough to hold a pointer.])
+    fi
+])
+AC_CHECK_TYPE([uintptr_t], [
+    AC_DEFINE([HAVE_UINTPTR_T], 1, [Do we have the uintptr_t type?])], [
+    AC_CACHE_CHECK([for pointer-size unsigned integer type], tcl_cv_uintptr_t, [
+    for tcl_cv_uintptr_t in "unsigned int" "unsigned long" "unsigned long long" \
+	    none; do
+	if test "$tcl_cv_uintptr_t" != none; then
+	    AC_COMPILE_IFELSE([AC_LANG_BOOL_COMPILE_TRY([AC_INCLUDES_DEFAULT],
+		    [[sizeof (void *) <= sizeof ($tcl_cv_uintptr_t)]])],
+		[tcl_ok=yes], [tcl_ok=no])
+	    test "$tcl_ok" = yes && break; fi
+    done])
+    if test "$tcl_cv_uintptr_t" != none; then
+	AC_DEFINE_UNQUOTED([uintptr_t], [$tcl_cv_uintptr_t], [Unsigned integer
+	   type wide enough to hold a pointer.])
+    fi
+])
+
+#--------------------------------------------------------------------
+#	If a system doesn't have an opendir function (man, that's old!)
+#	then we have to supply a different version of dirent.h which
+#	is compatible with the substitute version of opendir that's
+#	provided.  This version only works with V7-style directories.
+#--------------------------------------------------------------------
+
+AC_CHECK_FUNC(opendir, , [AC_DEFINE(USE_DIRENT2_H, 1, [May we include <dirent2.h>?])])
+
+#--------------------------------------------------------------------
+#	The check below checks whether <sys/wait.h> defines the type
+#	"union wait" correctly.  It's needed because of weirdness in
+#	HP-UX where "union wait" is defined in both the BSD and SYS-V
+#	environments.  Checking the usability of WIFEXITED seems to do
+#	the trick.
+#--------------------------------------------------------------------
+
+AC_CACHE_CHECK([union wait], tcl_cv_union_wait, [
+    AC_TRY_LINK([#include <sys/types.h>
+#include <sys/wait.h>], [
+union wait x;
+WIFEXITED(x);		/* Generates compiler error if WIFEXITED
+			 * uses an int. */
+    ], tcl_cv_union_wait=yes, tcl_cv_union_wait=no)])
+if test $tcl_cv_union_wait = no; then
+    AC_DEFINE(NO_UNION_WAIT, 1, [Do we have a usable 'union wait'?])
+fi
+
+#--------------------------------------------------------------------
+#	Check whether there is an strncasecmp function on this system.
+#	This is a bit tricky because under SCO it's in -lsocket and
+#	under Sequent Dynix it's in -linet.
+#--------------------------------------------------------------------
+
+AC_CHECK_FUNC(strncasecmp, tcl_ok=1, tcl_ok=0)
+if test "$tcl_ok" = 0; then
+    AC_CHECK_LIB(socket, strncasecmp, tcl_ok=1, tcl_ok=0)
+fi
+if test "$tcl_ok" = 0; then
+    AC_CHECK_LIB(inet, strncasecmp, tcl_ok=1, tcl_ok=0)
+fi
+if test "$tcl_ok" = 0; then
+    AC_LIBOBJ([strncasecmp])
+    USE_COMPAT=1
+fi
+
+#--------------------------------------------------------------------
+#	The code below deals with several issues related to gettimeofday:
+#	1. Some systems don't provide a gettimeofday function at all
+#	   (set NO_GETTOD if this is the case).
+#	2. See if gettimeofday is declared in the <sys/time.h> header file.
+#	   if not, set the GETTOD_NOT_DECLARED flag so that tclPort.h can
+#	   declare it.
+#--------------------------------------------------------------------
+
+AC_CHECK_FUNC(gettimeofday,[],[
+    AC_DEFINE(NO_GETTOD, 1, [Do we have gettimeofday()?])
+])
+AC_CACHE_CHECK([for gettimeofday declaration], tcl_cv_grep_gettimeofday, [
+    AC_EGREP_HEADER(gettimeofday, sys/time.h,
+	tcl_cv_grep_gettimeofday=present, tcl_cv_grep_gettimeofday=missing)])
+if test $tcl_cv_grep_gettimeofday = missing ; then
+    AC_DEFINE(GETTOD_NOT_DECLARED, 1, [Is gettimeofday() actually declared in <sys/time.h>?])
+fi
+
+#--------------------------------------------------------------------
+#	The following code checks to see whether it is possible to get
+#	signed chars on this platform.  This is needed in order to
+#	properly generate sign-extended ints from character values.
+#--------------------------------------------------------------------
+
+AC_C_CHAR_UNSIGNED
+AC_CACHE_CHECK([signed char declarations], tcl_cv_char_signed, [
+    AC_TRY_COMPILE(, [
+	signed char *p;
+	p = 0;
+	], tcl_cv_char_signed=yes, tcl_cv_char_signed=no)])
+if test $tcl_cv_char_signed = yes; then
+    AC_DEFINE(HAVE_SIGNED_CHAR, 1, [Are characters signed?])
+fi
+
+#--------------------------------------------------------------------
+#  Does putenv() copy or not?  We need to know to avoid memory leaks.
+#--------------------------------------------------------------------
+
+AC_CACHE_CHECK([for a putenv() that copies the buffer], tcl_cv_putenv_copy, [
+    AC_TRY_RUN([
+	#include <stdlib.h>
+	#define OURVAR "havecopy=yes"
+	int main (int argc, char *argv[])
+	{
+	    char *foo, *bar;
+	    foo = (char *)strdup(OURVAR);
+	    putenv(foo);
+	    strcpy((char *)(strchr(foo, '=') + 1), "no");
+	    bar = getenv("havecopy");
+	    if (!strcmp(bar, "no")) {
+		/* doesnt copy */
+		return 0;
+	    } else {
+		/* does copy */
+		return 1;
+	    }
+	}
+    ],
+    tcl_cv_putenv_copy=no,
+    tcl_cv_putenv_copy=yes,
+    tcl_cv_putenv_copy=no)])
+if test $tcl_cv_putenv_copy = yes; then
+    AC_DEFINE(HAVE_PUTENV_THAT_COPIES, 1,
+	[Does putenv() copy strings or incorporate them by reference?])
+fi
+
+#--------------------------------------------------------------------
+# Check for support of nl_langinfo function
+#--------------------------------------------------------------------
+
+SC_ENABLE_LANGINFO
+
+#--------------------------------------------------------------------
+# Check for support of chflags and mkstemps functions
+#--------------------------------------------------------------------
+
+AC_CHECK_FUNCS(chflags mkstemps)
+
+#--------------------------------------------------------------------
+# Check for support of isnan() function or macro
+#--------------------------------------------------------------------
+
+AC_CACHE_CHECK([isnan], tcl_cv_isnan, [
+    AC_TRY_LINK([#include <math.h>], [
+isnan(0.0);			/* Generates an error if isnan is missing */
+], tcl_cv_isnan=yes, tcl_cv_isnan=no)])
+if test $tcl_cv_isnan = no; then
+    AC_DEFINE(NO_ISNAN, 1, [Do we have a usable 'isnan'?])
+fi
+
+#--------------------------------------------------------------------
+# Darwin specific API checks and defines
+#--------------------------------------------------------------------
+
+if test "`uname -s`" = "Darwin" ; then
+    AC_CHECK_FUNCS(getattrlist)
+    AC_CHECK_HEADERS(copyfile.h)
+    AC_CHECK_FUNCS(copyfile)
+    if test $tcl_corefoundation = yes; then
+	AC_CHECK_HEADERS(libkern/OSAtomic.h)
+	AC_CHECK_FUNCS(OSSpinLockLock)
+    fi
+    AC_DEFINE(USE_VFORK, 1, [Should we use vfork() instead of fork()?])
+    AC_DEFINE(TCL_DEFAULT_ENCODING, "utf-8",
+	[Are we to override what our default encoding is?])
+    AC_DEFINE(TCL_LOAD_FROM_MEMORY, 1,
+	[Can this platform load code from memory?])
+    AC_DEFINE(TCL_WIDE_CLICKS, 1,
+	[Does this platform have wide high-resolution clicks?])
+    AC_CHECK_HEADERS(AvailabilityMacros.h)
+    if test "$ac_cv_header_AvailabilityMacros_h" = yes; then
+	AC_CACHE_CHECK([if weak import is available], tcl_cv_cc_weak_import, [
+	    hold_cflags=$CFLAGS; CFLAGS="$CFLAGS -Werror"
+	    AC_TRY_LINK([
+		    #ifdef __ENVIRONMENT_MAC_OS_X_VERSION_MIN_REQUIRED__
+		    #if __ENVIRONMENT_MAC_OS_X_VERSION_MIN_REQUIRED__ < 1020
+		    #error __ENVIRONMENT_MAC_OS_X_VERSION_MIN_REQUIRED__ < 1020
+		    #endif
+		    #elif MAC_OS_X_VERSION_MIN_REQUIRED < 1020
+		    #error MAC_OS_X_VERSION_MIN_REQUIRED < 1020
+		    #endif
+		    int rand(void) __attribute__((weak_import));
+		], [rand();],
+		tcl_cv_cc_weak_import=yes, tcl_cv_cc_weak_import=no)
+	    CFLAGS=$hold_cflags])
+	if test $tcl_cv_cc_weak_import = yes; then
+	    AC_DEFINE(HAVE_WEAK_IMPORT, 1, [Is weak import available?])
+	fi
+	AC_CACHE_CHECK([if Darwin SUSv3 extensions are available],
+	    tcl_cv_cc_darwin_c_source, [
+	    hold_cflags=$CFLAGS; CFLAGS="$CFLAGS -Werror"
+	    AC_TRY_COMPILE([
+		    #ifdef __ENVIRONMENT_MAC_OS_X_VERSION_MIN_REQUIRED__
+		    #if __ENVIRONMENT_MAC_OS_X_VERSION_MIN_REQUIRED__ < 1050
+		    #error __ENVIRONMENT_MAC_OS_X_VERSION_MIN_REQUIRED__ < 1050
+		    #endif
+		    #elif MAC_OS_X_VERSION_MIN_REQUIRED < 1050
+		    #error MAC_OS_X_VERSION_MIN_REQUIRED < 1050
+		    #endif
+		    #define _DARWIN_C_SOURCE 1
+		    #include <sys/cdefs.h>
+		],,tcl_cv_cc_darwin_c_source=yes, tcl_cv_cc_darwin_c_source=no)
+	    CFLAGS=$hold_cflags])
+	if test $tcl_cv_cc_darwin_c_source = yes; then
+	    AC_DEFINE(_DARWIN_C_SOURCE, 1,
+		    [Are Darwin SUSv3 extensions available?])
+	fi
+    fi
+    # Build .bundle dltest binaries in addition to .dylib
+    DLTEST_LD='${CC} -bundle -Wl,-w ${CFLAGS} ${LDFLAGS}'
+    DLTEST_SUFFIX=".bundle"
+else
+    DLTEST_LD='${SHLIB_LD}'
+    DLTEST_SUFFIX=""
+fi
+
+#--------------------------------------------------------------------
+#	Check for support of fts functions (readdir replacement)
+#--------------------------------------------------------------------
+
+AC_CACHE_CHECK([for fts], tcl_cv_api_fts, [
+    AC_TRY_LINK([
+	    #include <sys/param.h>
+	    #include <sys/stat.h>
+	    #include <fts.h>
+	], [
+	    char*const p[2] = {"/", NULL};
+	    FTS *f = fts_open(p, FTS_PHYSICAL|FTS_NOCHDIR|FTS_NOSTAT, NULL);
+	    FTSENT *e = fts_read(f); fts_close(f);
+	], tcl_cv_api_fts=yes, tcl_cv_api_fts=no)])
+if test $tcl_cv_api_fts = yes; then
+    AC_DEFINE(HAVE_FTS, 1, [Do we have fts functions?])
+fi
+
+#--------------------------------------------------------------------
+#	The statements below check for systems where POSIX-style non-blocking
+#	I/O (O_NONBLOCK) doesn't work or is unimplemented. On these systems
+#	(mostly older ones), use the old BSD-style FIONBIO approach instead.
+#--------------------------------------------------------------------
+
+SC_BLOCKING_STYLE
+
+#------------------------------------------------------------------------
+
+AC_MSG_CHECKING([whether to use dll unloading])
+AC_ARG_ENABLE(dll-unloading,
+    AC_HELP_STRING([--enable-dll-unloading],
+	[enable the 'unload' command (default: on)]),
+    [tcl_ok=$enableval], [tcl_ok=yes])
+if test $tcl_ok = yes; then
+    AC_DEFINE(TCL_UNLOAD_DLLS, 1, [Do we allow unloading of shared libraries?])
+fi
+AC_MSG_RESULT([$tcl_ok])
+
+#------------------------------------------------------------------------
+#	Check whether the timezone data is supplied by the OS or has
+#	to be installed by Tcl. The default is autodetection, but can
+#	be overriden on the configure command line either way.
+#------------------------------------------------------------------------
+
+AC_MSG_CHECKING([for timezone data])
+AC_ARG_WITH(tzdata,
+    AC_HELP_STRING([--with-tzdata],
+	[install timezone data (default: autodetect)]),
+    [tcl_ok=$withval], [tcl_ok=auto])
+#
+# Any directories that get added here must also be added to the
+# search path in ::tcl::clock::Initialize (library/clock.tcl).
+#
+case $tcl_ok in
+    no)
+	AC_MSG_RESULT([supplied by OS vendor])
+    ;;
+    yes)
+	# nothing to do here
+    ;;
+    auto*)
+	AC_CACHE_VAL([tcl_cv_dir_zoneinfo], [
+	for dir in /usr/share/zoneinfo \
+		/usr/share/lib/zoneinfo \
+		/usr/lib/zoneinfo
+	do
+		if test -f $dir/UTC -o -f $dir/GMT
+		then
+			tcl_cv_dir_zoneinfo="$dir"
+			break
+		fi
+	done])
+	if test -n "$tcl_cv_dir_zoneinfo"; then
+	    tcl_ok=no
+	    AC_MSG_RESULT([$dir])
+	else
+	    tcl_ok=yes
+	fi
+    ;;
+    *)
+	AC_MSG_ERROR([invalid argument: $tcl_ok])
+    ;;
+esac
+if test $tcl_ok = yes
+then
+    AC_MSG_RESULT([supplied by Tcl])
+    INSTALL_TZDATA=install-tzdata
+fi
+
+#--------------------------------------------------------------------
+#	DTrace support
+#--------------------------------------------------------------------
+
+AC_ARG_ENABLE(dtrace,
+    AC_HELP_STRING([--enable-dtrace],
+	[build with DTrace support (default: off)]),
+    [tcl_ok=$enableval], [tcl_ok=no])
+if test $tcl_ok = yes; then
+    AC_CHECK_HEADER(sys/sdt.h, [tcl_ok=yes], [tcl_ok=no])
+fi
+if test $tcl_ok = yes; then
+    AC_PATH_PROG(DTRACE, dtrace,, [$PATH:/usr/sbin])
+    test -z "$ac_cv_path_DTRACE" && tcl_ok=no
+fi
+AC_MSG_CHECKING([whether to enable DTrace support])
+MAKEFILE_SHELL='/bin/sh'
+if test $tcl_ok = yes; then
+    AC_DEFINE(USE_DTRACE, 1, [Are we building with DTrace support?])
+    DTRACE_SRC="\${DTRACE_SRC}"
+    DTRACE_HDR="\${DTRACE_HDR}"
+    if test "`uname -s`" != "Darwin" ; then
+	DTRACE_OBJ="\${DTRACE_OBJ}"
+	if test "`uname -s`" = "SunOS" -a "$SHARED_BUILD" = "0" ; then
+	    # Need to create an intermediate object file to ensure tclDTrace.o
+	    # gets included when linking against the static tcl library.
+	    STLIB_LD='stlib_ld () { /usr/ccs/bin/ld -r -o $${1%.a}.o "$${@:2}" && '"${STLIB_LD}"' $${1} $${1%.a}.o ; } && stlib_ld'
+	    MAKEFILE_SHELL='/bin/bash'
+	    # Force use of Sun ar and ranlib, the GNU versions choke on
+	    # tclDTrace.o and the combined object file above.
+	    AR='/usr/ccs/bin/ar'
+	    RANLIB='/usr/ccs/bin/ranlib'
+	fi
+    fi
+fi
+AC_MSG_RESULT([$tcl_ok])
+
+#--------------------------------------------------------------------
+# The check below checks whether the cpuid instruction is usable.
+#--------------------------------------------------------------------
+
+AC_CACHE_CHECK([whether the cpuid instruction is usable], tcl_cv_cpuid, [
+    AC_TRY_LINK(, [
+	int index,regsPtr[4];
+    __asm__ __volatile__("mov %%ebx, %%edi     \n\t"
+                 "cpuid            \n\t"
+                 "mov %%ebx, %%esi   \n\t"
+                 "mov %%edi, %%ebx  \n\t"
+                 : "=a"(regsPtr[0]), "=S"(regsPtr[1]), "=c"(regsPtr[2]), "=d"(regsPtr[3])
+                 : "a"(index) : "edi");
+    ], tcl_cv_cpuid=yes, tcl_cv_cpuid=no)])
+if test $tcl_cv_cpuid = yes; then
+    AC_DEFINE(HAVE_CPUID, 1, [Is the cpuid instruction usable?])
+fi
+
+#--------------------------------------------------------------------
+#	The statements below define a collection of symbols related to
+#	building libtcl as a shared library instead of a static library.
+#--------------------------------------------------------------------
+
+TCL_UNSHARED_LIB_SUFFIX=${UNSHARED_LIB_SUFFIX}
+TCL_SHARED_LIB_SUFFIX=${SHARED_LIB_SUFFIX}
+eval "TCL_LIB_FILE=libtcl${LIB_SUFFIX}"
+
+# tclConfig.sh needs a version of the _LIB_SUFFIX that has been eval'ed
+# since on some platforms TCL_LIB_FILE contains shell escapes.
+# (See also: TCL_TRIM_DOTS).
+
+eval "TCL_LIB_FILE=${TCL_LIB_FILE}"
+
+TCL_LIBRARY='$(prefix)/lib/tcl$(VERSION)'
+PRIVATE_INCLUDE_DIR='$(includedir)'
+HTML_DIR='$(DISTDIR)/html'
+
+# Note:  in the following variable, it's important to use the absolute
+# path name of the Tcl directory rather than "..":  this is because
+# AIX remembers this path and will attempt to use it at run-time to look
+# up the Tcl library.
+
+if test "`uname -s`" = "Darwin" ; then
+    SC_ENABLE_FRAMEWORK
+    TCL_SHLIB_LD_EXTRAS="-compatibility_version ${TCL_VERSION} -current_version ${TCL_VERSION}`echo ${TCL_PATCH_LEVEL} | awk ['{match($0, "\\\.[0-9]+"); print substr($0,RSTART,RLENGTH)}']`"
+    TCL_SHLIB_LD_EXTRAS="${TCL_SHLIB_LD_EXTRAS}"' -install_name "${DYLIB_INSTALL_DIR}"/${TCL_LIB_FILE}'
+    echo "$LDFLAGS " | grep -q -- '-prebind ' && TCL_SHLIB_LD_EXTRAS="${TCL_SHLIB_LD_EXTRAS}"' -seg1addr 0xa000000'
+    TCL_SHLIB_LD_EXTRAS="${TCL_SHLIB_LD_EXTRAS}"' -sectcreate __TEXT __info_plist Tcl-Info.plist'
+    EXTRA_TCLSH_LIBS='-sectcreate __TEXT __info_plist Tclsh-Info.plist'
+    EXTRA_APP_CC_SWITCHES='-mdynamic-no-pic'
+    AC_CONFIG_FILES([Tcl-Info.plist:../macosx/Tcl-Info.plist.in Tclsh-Info.plist:../macosx/Tclsh-Info.plist.in])
+    TCL_YEAR="`date +%Y`"
+fi
+
+if test "$FRAMEWORK_BUILD" = "1" ; then
+    AC_DEFINE(TCL_FRAMEWORK, 1, [Is Tcl built as a framework?])
+    # Construct a fake local framework structure to make linking with
+    # '-framework Tcl' and running of tcltest work
+    AC_CONFIG_COMMANDS([Tcl.framework], [n=Tcl &&
+        f=$n.framework && v=Versions/$VERSION &&
+        rm -rf $f && mkdir -p $f/$v/Resources &&
+        ln -s $v/$n $v/Resources $f && ln -s ../../../$n $f/$v &&
+        ln -s ../../../../$n-Info.plist $f/$v/Resources/Info.plist &&
+        unset n f v
+    ], VERSION=${TCL_VERSION})
+    LD_LIBRARY_PATH_VAR="DYLD_FRAMEWORK_PATH"
+    # default install directory for bundled packages
+    if test "${libdir}" = '${exec_prefix}/lib' -o "`basename ${libdir}`" = 'Frameworks'; then
+        PACKAGE_DIR="/Library/Tcl"
+    else
+        PACKAGE_DIR="$libdir"
+    fi
+    if test "${libdir}" = '${exec_prefix}/lib'; then
+        # override libdir default
+        libdir="/Library/Frameworks"
+    fi
+    TCL_LIB_FILE="Tcl"
+    TCL_LIB_FLAG="-framework Tcl"
+    TCL_BUILD_LIB_SPEC="-F`pwd | sed -e 's/ /\\\\ /g'` -framework Tcl"
+    TCL_LIB_SPEC="-F${libdir} -framework Tcl"
+    libdir="${libdir}/Tcl.framework/Versions/\${VERSION}"
+    TCL_LIBRARY="${libdir}/Resources/Scripts"
+    includedir="${libdir}/Headers"
+    PRIVATE_INCLUDE_DIR="${libdir}/PrivateHeaders"
+    HTML_DIR="${libdir}/Resources/Documentation/Reference/Tcl"
+    EXTRA_INSTALL="install-private-headers html-tcl"
+    EXTRA_BUILD_HTML='@ln -fs contents.htm "$(HTML_INSTALL_DIR)"/TclTOC.html'
+    EXTRA_INSTALL_BINARIES='@echo "Installing Info.plist to $(LIB_INSTALL_DIR)/Resources/" && $(INSTALL_DATA_DIR) "$(LIB_INSTALL_DIR)/Resources" && $(INSTALL_DATA) Tcl-Info.plist "$(LIB_INSTALL_DIR)/Resources/Info.plist"'
+    EXTRA_INSTALL_BINARIES="$EXTRA_INSTALL_BINARIES"' && echo "Installing license.terms to $(LIB_INSTALL_DIR)/Resources/" && $(INSTALL_DATA) "$(TOP_DIR)/license.terms" "$(LIB_INSTALL_DIR)/Resources"'
+    EXTRA_INSTALL_BINARIES="$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" "$(LIB_INSTALL_DIR)/../.."'
+    # Don't use AC_DEFINE for the following as the framework version define
+    # needs to go into the Makefile even when using autoheader, so that we
+    # can pick up a potential make override of VERSION. Also, don't put this
+    # into CFLAGS as it should not go into tclConfig.sh
+    EXTRA_CC_SWITCHES='-DTCL_FRAMEWORK_VERSION=\"$(VERSION)\"'
+else
+    # libdir must be a fully qualified path and not ${exec_prefix}/lib
+    eval libdir="$libdir"
+    # default install directory for bundled packages
+    PACKAGE_DIR="$libdir"
+    if test "${TCL_LIB_VERSIONS_OK}" = "ok"; then
+        TCL_LIB_FLAG="-ltcl${TCL_VERSION}"
+    else
+        TCL_LIB_FLAG="-ltcl`echo ${TCL_VERSION} | tr -d .`"
+    fi
+    TCL_BUILD_LIB_SPEC="-L`pwd | sed -e 's/ /\\\\ /g'` ${TCL_LIB_FLAG}"
+    TCL_LIB_SPEC="-L${libdir} ${TCL_LIB_FLAG}"
+fi
+VERSION='${VERSION}'
+eval "CFG_TCL_SHARED_LIB_SUFFIX=${TCL_SHARED_LIB_SUFFIX}"
+eval "CFG_TCL_UNSHARED_LIB_SUFFIX=${TCL_UNSHARED_LIB_SUFFIX}"
+VERSION=${TCL_VERSION}
+
+#--------------------------------------------------------------------
+#	The statements below define the symbol TCL_PACKAGE_PATH, which
+#	gives a list of directories that may contain packages.  The list
+#	consists of one directory for machine-dependent binaries and
+#	another for platform-independent scripts.
+#--------------------------------------------------------------------
+
+if test "$FRAMEWORK_BUILD" = "1" ; then
+    test -z "$TCL_PACKAGE_PATH" && \
+	TCL_PACKAGE_PATH="~/Library/Tcl /Library/Tcl /System/Library/Tcl ~/Library/Frameworks /Library/Frameworks /System/Library/Frameworks"
+    test -z "$TCL_MODULE_PATH"  && \
+	TCL_MODULE_PATH="~/Library/Tcl /Library/Tcl /System/Library/Tcl"
+elif test "$prefix/lib" != "$libdir"; then
+    TCL_PACKAGE_PATH="${libdir} ${prefix}/lib ${TCL_PACKAGE_PATH}"
+else
+    TCL_PACKAGE_PATH="${prefix}/lib ${TCL_PACKAGE_PATH}"
+fi
+
+#--------------------------------------------------------------------
+#       The statements below define various symbols relating to Tcl
+#       stub support.
+#--------------------------------------------------------------------
+
+# Replace ${VERSION} with contents of ${TCL_VERSION}
+# double-eval to account for TCL_TRIM_DOTS.
+#
+eval "TCL_STUB_LIB_FILE=libtclstub${TCL_UNSHARED_LIB_SUFFIX}"
+eval "TCL_STUB_LIB_FILE=\"${TCL_STUB_LIB_FILE}\""
+eval "TCL_STUB_LIB_DIR=${libdir}"
+
+if test "${TCL_LIB_VERSIONS_OK}" = "ok"; then
+    TCL_STUB_LIB_FLAG="-ltclstub${TCL_VERSION}"
+else
+    TCL_STUB_LIB_FLAG="-ltclstub`echo ${TCL_VERSION} | tr -d .`"
+fi
+
+TCL_BUILD_STUB_LIB_SPEC="-L`pwd | sed -e 's/ /\\\\ /g'` ${TCL_STUB_LIB_FLAG}"
+TCL_STUB_LIB_SPEC="-L${TCL_STUB_LIB_DIR} ${TCL_STUB_LIB_FLAG}"
+TCL_BUILD_STUB_LIB_PATH="`pwd`/${TCL_STUB_LIB_FILE}"
+TCL_STUB_LIB_PATH="${TCL_STUB_LIB_DIR}/${TCL_STUB_LIB_FILE}"
+
+# Install time header dir can be set via --includedir
+eval "TCL_INCLUDE_SPEC=\"-I${includedir}\""
+
+#------------------------------------------------------------------------
+# tclConfig.sh refers to this by a different name
+#------------------------------------------------------------------------
+
+TCL_SHARED_BUILD=${SHARED_BUILD}
+
+AC_SUBST(TCL_VERSION)
+AC_SUBST(TCL_MAJOR_VERSION)
+AC_SUBST(TCL_MINOR_VERSION)
+AC_SUBST(TCL_PATCH_LEVEL)
+AC_SUBST(TCL_YEAR)
+AC_SUBST(PKG_CFG_ARGS)
+
+AC_SUBST(TCL_LIB_FILE)
+AC_SUBST(TCL_LIB_FLAG)
+AC_SUBST(TCL_LIB_SPEC)
+AC_SUBST(TCL_STUB_LIB_FILE)
+AC_SUBST(TCL_STUB_LIB_FLAG)
+AC_SUBST(TCL_STUB_LIB_SPEC)
+AC_SUBST(TCL_STUB_LIB_PATH)
+AC_SUBST(TCL_INCLUDE_SPEC)
+AC_SUBST(TCL_BUILD_STUB_LIB_SPEC)
+AC_SUBST(TCL_BUILD_STUB_LIB_PATH)
+
+AC_SUBST(TCL_SRC_DIR)
+AC_SUBST(CFG_TCL_SHARED_LIB_SUFFIX)
+AC_SUBST(CFG_TCL_UNSHARED_LIB_SUFFIX)
+
+AC_SUBST(TCL_SHARED_BUILD)
+AC_SUBST(LD_LIBRARY_PATH_VAR)
+
+AC_SUBST(TCL_BUILD_LIB_SPEC)
+
+AC_SUBST(TCL_LIB_VERSIONS_OK)
+AC_SUBST(TCL_SHARED_LIB_SUFFIX)
+AC_SUBST(TCL_UNSHARED_LIB_SUFFIX)
+
+AC_SUBST(TCL_HAS_LONGLONG)
+
+AC_SUBST(INSTALL_TZDATA)
+
+AC_SUBST(DTRACE_SRC)
+AC_SUBST(DTRACE_HDR)
+AC_SUBST(DTRACE_OBJ)
+AC_SUBST(MAKEFILE_SHELL)
+
+AC_SUBST(BUILD_DLTEST)
+AC_SUBST(TCL_PACKAGE_PATH)
+AC_SUBST(TCL_MODULE_PATH)
+
+AC_SUBST(TCL_LIBRARY)
+AC_SUBST(PRIVATE_INCLUDE_DIR)
+AC_SUBST(HTML_DIR)
+AC_SUBST(PACKAGE_DIR)
+
+AC_SUBST(EXTRA_CC_SWITCHES)
+AC_SUBST(EXTRA_APP_CC_SWITCHES)
+AC_SUBST(EXTRA_INSTALL)
+AC_SUBST(EXTRA_INSTALL_BINARIES)
+AC_SUBST(EXTRA_BUILD_HTML)
+AC_SUBST(EXTRA_TCLSH_LIBS)
+
+AC_SUBST(DLTEST_LD)
+AC_SUBST(DLTEST_SUFFIX)
+
+dnl	Disable the automake-friendly normalization of LIBOBJS
+dnl	performed by autoconf 2.53 and later.  It's not correct for us.
+define([_AC_LIBOBJS_NORMALIZE],[])
+AC_CONFIG_FILES([
+    Makefile:../unix/Makefile.in
+    dltest/Makefile:../unix/dltest/Makefile.in
+    tclConfig.sh:../unix/tclConfig.sh.in
+    tcl.pc:../unix/tcl.pc.in
+])
+AC_OUTPUT
+
+dnl Local Variables:
+dnl mode: autoconf
+dnl End: