Modified some macros based on how some of the extensions work.

1 files changed, 710 insertions, 148 deletions

diff --git a/unix/tcl.m4 b/unix/tcl.m4
index c277917..b7a34eb 100644
--- a/unix/tcl.m4
+++ b/unix/tcl.m4
@@ -13,7 +13,7 @@
 #		--with-tcl=...
 #
 #	Defines the following vars:
-#		TCLCONFIG	Full path to the tclConfig.sh file
+#		TCL_BIN_DIR	Full path to the tclConfig.sh file
 #------------------------------------------------------------------------
 
 AC_DEFUN(SC_PATH_TCLCONFIG, [
@@ -26,7 +26,7 @@ AC_DEFUN(SC_PATH_TCLCONFIG, [
 if test x"${no_tcl}" = x ; then
     # we reset no_tcl in case something fails here
     no_tcl=true
-    AC_ARG_WITH(tcl, [  --with-tcl           directory containing tcl configuration (tclConfig.sh)],
+    AC_ARG_WITH(tcl, [  --with-tcl              directory containing tcl configuration (tclConfig.sh)],
 	    with_tclconfig=${withval})
     AC_MSG_CHECKING([for Tcl configuration])
     AC_CACHE_VAL(ac_cv_c_tclconfig,[
@@ -81,13 +81,13 @@ if test x"${no_tcl}" = x ; then
     ])
 
     if test x"${ac_cv_c_tclconfig}" = x ; then
-	TCLCONFIG="# no Tcl configs found"
+	TCL_BIN_DIR="# no Tcl configs found"
 	AC_MSG_WARN(Can't find Tcl configuration definitions)
 	exit 0
     else
 	no_tcl=
-	TCLCONFIG=${ac_cv_c_tclconfig}/tclConfig.sh
-	AC_MSG_RESULT(found $TCLCONFIG)
+	TCL_BIN_DIR=${ac_cv_c_tclconfig}
+	AC_MSG_RESULT(found $TCL_BIN_DIR/tclConfig.sh)
     fi
 fi
 ])
@@ -106,7 +106,7 @@ fi
 #		--with-tk=...
 #
 #	Defines the following vars:
-#		TKCONFIG	Full path to the tkConfig.sh file
+#		TK_BIN_DIR	Full path to the tkConfig.sh file
 #------------------------------------------------------------------------
 
 AC_DEFUN(SC_PATH_TKCONFIG, [
@@ -119,7 +119,7 @@ AC_DEFUN(SC_PATH_TKCONFIG, [
 if test x"${no_tk}" = x ; then
   # we reset no_tk in case something fails here
   no_tk=true
-  AC_ARG_WITH(tk, [  --with-tk           directory containing tk configuration (tkConfig.sh)],
+  AC_ARG_WITH(tk, [  --with-tk               directory containing tk configuration (tkConfig.sh)],
          with_tkconfig=${withval})
   AC_MSG_CHECKING([for Tk configuration])
   AC_CACHE_VAL(ac_cv_c_tkconfig,[
@@ -171,13 +171,13 @@ if test x"${no_tk}" = x ; then
   fi
   ])
   if test x"${ac_cv_c_tkconfig}" = x ; then
-    TKCONFIG="# no Tk configs found"
+    TK_BIN_DIR="# no Tk configs found"
     AC_MSG_WARN(Can't find Tk configuration definitions)
     exit 0
   else
     no_tk=
-    TKCONFIG=${ac_cv_c_tkconfig}/tkConfig.sh
-    AC_MSG_RESULT(found $TKCONFIG)
+    TK_BIN_DIR=${ac_cv_c_tkconfig}
+    AC_MSG_RESULT(found $TK_BIN_DIR/tkConfig.sh)
   fi
 fi
 
@@ -191,92 +191,37 @@ fi
 # Arguments:
 #	
 #	Requires the following vars to be set:
-#		TCLCONFIG
+#		TCL_BIN_DIR
 #
 # Results:
 #
-#	Subst's the following vars:
-#		TCL_CC
-#		TCL_DEFS
-#		TCL_CFLAGS
-#		TCL_DBGX
-#		TCL_LIBS
-#		TCL_SHLIB_LD
-#		SHLIB_SUFFIX
-#		TCL_LD_FLAGS
-#		TCL_BUILD_LIB_SPEC
-#		TCL_LIB_SPEC
-#		TCL_SHARED_LIB_SUFFIX
+#	Sets the following vars that should be in tclConfig.sh:
+#		TCL_SRC_DIR
+#		TCL_LIB_FILE
+#		TCL_LIB_FLAG
+#	Does not defines the following vars:
+#		TCL_THREADS
+#
 #------------------------------------------------------------------------
 
 AC_DEFUN(SC_LOAD_TCLCONFIG, [
-    if test -f "$TCLCONFIG" ; then
-	. $TCLCONFIG
+    if test -f "$TCL_BIN_DIR/tclConfig.sh" ; then
+	. $TCL_BIN_DIR/tclConfig.sh
     fi
 
-dnl AC_SUBST(TCL_VERSION)
-dnl AC_SUBST(TCL_MAJOR_VERSION)
-dnl AC_SUBST(TCL_MINOR_VERSION)
-    AC_SUBST(TCL_CC)
-    AC_SUBST(TCL_DEFS)
-    AC_SUBST(TCL_CFLAGS)
-    AC_SUBST(TCL_DBGX)
-
-dnl not used, don't export to save symbols
-dnl    AC_SUBST(TCL_LIB_FILE)
-
-dnl don't export, not used outside of configure
-     AC_SUBST(TCL_LIBS)
-dnl not used, don't export to save symbols
-dnl    AC_SUBST(TCL_PREFIX)
-
-dnl not used, don't export to save symbols
-dnl    AC_SUBST(TCL_EXEC_PREFIX)
-
-
-dnl not used, don't export to save symbols
-dnl AC_SUBST(TCL_SHLIB_CFLAGS)
-    AC_SUBST(TCL_SHLIB_LD)
-dnl don't export, not used outside of configure
-dnl AC_SUBST(TCL_SHLIB_LD_LIBS)
-
-# Tcl defines TCL_SHLIB_SUFFIX but TCL_SHARED_LIB_SUFFIX then looks for it
-# as just SHLIB_SUFFIX.  How bizarre.
-    SHLIB_SUFFIX=$TCL_SHLIB_SUFFIX
-    AC_SUBST(SHLIB_SUFFIX)
-
-dnl not used, don't export to save symbols
-dnl AC_SUBST(TCL_DL_LIBS)
-    AC_SUBST(TCL_LD_FLAGS)
-dnl don't export, not used outside of configure
-dnl AC_SUBST(TCL_LD_SEARCH_FLAGS)
-dnl AC_SUBST(TCL_COMPAT_OBJS)
-dnl AC_SUBST(TCL_RANLIB)
-
-# if Tcl's build directory has been removed, TCL_LIB_SPEC should
-# be used instead of TCL_BUILD_LIB_SPEC
-SAVELIBS=$LIBS
-eval "LIBS=\"$TCL_BUILD_LIB_SPEC $TCL_LIBS\""
-AC_CHECK_FUNC(Tcl_CreateCommand,[
-        AC_MSG_CHECKING([if Tcl library build specification is valid])
-        AC_MSG_RESULT(yes)
-],[
-        TCL_BUILD_LIB_SPEC=$TCL_LIB_SPEC
-        # Can't pull the following CHECKING call out since it will be
-        # broken up by the CHECK_FUNC just above.
-        AC_MSG_CHECKING([if Tcl library build specification is valid])
-        AC_MSG_RESULT(no)
-])
-LIBS=$SAVELIBS
-
-    AC_SUBST(TCL_BUILD_LIB_SPEC)
-    AC_SUBST(TCL_LIB_SPEC)
-dnl AC_SUBST(TCL_LIB_VERSIONS_OK)
+    #
+    # The eval is required to do the TCL_DBGX substitution in the
+    # TCL_LIB_FILE variable
+    #
 
-    AC_SUBST(TCL_SHARED_LIB_SUFFIX)
+    eval TCL_LIB_FILE=${TCL_LIB_FILE}
+    eval TCL_LIB_FLAG=${TCL_LIB_FLAG}
 
-dnl not used, don't export to save symbols
-dnl    AC_SUBST(TCL_UNSHARED_LIB_SUFFIX)
+#    if test "x$TCL_THREADS" = "x"; then
+#	echo "Tcl not built with threads"
+#    else
+#	AC_DEFINE(TCL_THREADS)
+#    fi
 ])
 
 #------------------------------------------------------------------------
@@ -287,7 +232,7 @@ dnl    AC_SUBST(TCL_UNSHARED_LIB_SUFFIX)
 # Arguments:
 #	
 #	Requires the following vars to be set:
-#		TKCONFIG
+#		TK_BIN_DIR
 #
 # Results:
 #
@@ -303,32 +248,9 @@ dnl    AC_SUBST(TCL_UNSHARED_LIB_SUFFIX)
 #------------------------------------------------------------------------
 
 AC_DEFUN(SC_LOAD_TKCONFIG, [
-    if test -f "$TKCONFIG" ; then
-      . $TKCONFIG
+    if test -f "$TK_BIN_DIR/tkConfig.sh" ; then
+      . $TK_BIN_DIR/tkConfig.sh
     fi
-
-    AC_SUBST(TK_VERSION)
-dnl not actually used, don't export to save symbols
-dnl    AC_SUBST(TK_MAJOR_VERSION)
-dnl    AC_SUBST(TK_MINOR_VERSION)
-    AC_SUBST(TK_DEFS)
-    AC_SUBST(TK_DBGX)
-
-dnl not used, don't export to save symbols
-    dnl AC_SUBST(TK_LIB_FILE)
-
-dnl not used outside of configure
-    AC_SUBST(TK_LIBS)
-dnl not used, don't export to save symbols
-dnl    AC_SUBST(TK_PREFIX)
-
-dnl not used, don't export to save symbols
-dnl    AC_SUBST(TK_EXEC_PREFIX)
-
-    AC_SUBST(TK_XINCLUDES)
-    AC_SUBST(TK_XLIBSW)
-    AC_SUBST(TK_BUILD_LIB_SPEC)
-    AC_SUBST(TK_LIB_SPEC)
 ])
 
 #------------------------------------------------------------------------
@@ -373,29 +295,35 @@ AC_DEFUN(SC_ENABLE_GCC, [
 #		--enable-shared=yes|no
 #
 #	Subst's the following vars:
-#		BUILD_SHARED	Value of YES or NO
+#		SHARED_BUILD	Value of 1 or 0
+#
+#	May define the following vars:
+#		STATIC_BUILD (Not sure, but might only be used in Windows)
 #------------------------------------------------------------------------
 
 AC_DEFUN(SC_ENABLE_SHARED, [
+    AC_MSG_CHECKING([how to build libraries])
     AC_ARG_ENABLE(shared,
 	[  --enable-shared         build and link with shared libraries [--enable-shared]],
-	[BUILD_SHARED=$enableval],
-	[BUILD_SHARED=NO])
-    case "$BUILD_SHARED" in
-	YES|yes)
-	    AC_MSG_RESULT(Will build shared libraries)
-	    BUILD_SHARED=YES
-	    ;;
-	NO|no)
-	    AC_MSG_RESULT(Will not build shared libraries)
-	    BUILD_SHARED=NO
-	    ;;
-	*)
-	    AC_MSG_ERROR(Invalid argument to --enable-shared=, expected YES or NO)
-	    exit 1
-	    ;;
-    esac
-    AC_SUBST(BUILD_SHARED)
+	[tcl_ok=$enableval], [tcl_ok=yes])
+
+    if test "${enable_shared+set}" = set; then
+	enableval="$enable_shared"
+	tcl_ok=$enableval
+    else
+	tcl_ok=yes
+    fi
+
+    if test "$tcl_ok" = "yes" ; then
+	AC_MSG_RESULT([shared])
+	SHARED_BUILD=1
+    else
+	AC_MSG_RESULT([static])
+	SHARED_BUILD=0
+	AC_DEFINE(STATIC_BUILD)
+    fi
+
+    AC_SUBST(SHARED_BUILD)
 ])
 
 #------------------------------------------------------------------------
@@ -409,21 +337,25 @@ AC_DEFUN(SC_ENABLE_SHARED, [
 # Results:
 #
 #	Adds the following arguments to configure:
-#		--enable-threads=yes|no
+#		--enable-threads
 #
-#	Defines the following vars:
+#	Sets the following vars:
 #		THREADS_LIBS	Thread library(s)
+#
+#	Defines the following vars:
 #		TCL_THREADS
 #		_REENTRANT
-#		CFLAGS_WARNING	C flags warnings for gcc
 #
 #------------------------------------------------------------------------
 
 AC_DEFUN(SC_ENABLE_THREADS, [
-    AC_ARG_ENABLE(threads,[  --enable-threads        enable Threads support [--disable-threads]],,enableval="no")
+    AC_MSG_CHECKING(for building with threads)
+    AC_ARG_ENABLE(threads, [  --enable-threads        build with threads],
+	[tcl_ok=$enableval], [tcl_ok=no])
 
-    if test "$enableval" = "yes"; then
-	AC_MSG_RESULT(Will compile with Threads support)
+    if test "$tcl_ok" = "yes"; then
+	AC_MSG_RESULT(yes)
+	TCL_THREADS=1
 	AC_DEFINE(TCL_THREADS)
 	AC_DEFINE(_REENTRANT)
 
@@ -432,21 +364,14 @@ AC_DEFUN(SC_ENABLE_THREADS, [
 	    # The space is needed
 	    THREADS_LIBS=" -lpthread"
 	else
+	    TCL_THREADS=0
 	    AC_MSG_WARN("Don t know how to find pthread lib on your system - you must disable thread support or edit the LIBS in the Makefile...")
 	fi
     else
-	AC_MSG_RESULT(Will compile without Threads support (normal))
+	TCL_THREADS=0
+	AC_MSG_RESULT(no (default))
     fi
 
-    # set the warning flags depending on whether or not we are using gcc
-    if test "${GCC}" = "yes" ; then
-	# leave -Wimplicit-int out, the X libs generate so many of these warnings
-	# that they obscure everything else.
-
-	CFLAGS_WARNING="-Wall -Wconversion -Wno-implicit-int"
-    else
-	CFLAGS_WARNING=""
-    fi
 ])
 
 #------------------------------------------------------------------------
@@ -469,24 +394,637 @@ AC_DEFUN(SC_ENABLE_THREADS, [
 #	Defines the following vars:
 #		CFLAGS_DEFAULT	Sets to CFLAGS_DEBUG if true
 #				Sets to CFLAGS_OPTIMIZE if false
+#		LDFLAGS_DEFAULT	Sets to LDFLAGS_DEBUG if true
+#				Sets to LDFLAGS_OPTIMIZE if false
 #		DBGX		Debug library extension
 #
 #------------------------------------------------------------------------
 
 AC_DEFUN(SC_ENABLE_SYMBOLS, [
+    AC_MSG_CHECKING([for build with symbols])
     AC_ARG_ENABLE(symbols, [  --enable-symbols        build with debugging symbols [--disable-symbols]],    [tcl_ok=$enableval], [tcl_ok=no])
     if test "$tcl_ok" = "yes"; then
 	CFLAGS_DEFAULT='$(CFLAGS_DEBUG)'
+	LD_FLAGS_DEFAULT='$(LDFLAGS_DEBUG)'
 	DBGX=g
+	AC_MSG_RESULT([yes])
     else
 	CFLAGS_DEFAULT='$(CFLAGS_OPTIMIZE)'
+	LD_FLAGS_DEFAULT='$(LDFLAGS_OPTIMIZE)'
 	DBGX=""
+	AC_MSG_RESULT([no])
+    fi
+])
+
+#--------------------------------------------------------------------
+# SC_SERIAL_PORT
+#
+#	Determine which interface to use to talk to the serial port.
+#	Note that #include lines must begin in leftmost column for
+#	some compilers to recognize them as preprocessor directives.
+#
+# Arguments:
+#	none
+#	
+# Results:
+#
+#	Defines only one of the following vars:
+#		USE_TERMIOS
+#		USE_TERMIO
+#		USE_SGTTY
+#
+#--------------------------------------------------------------------
+
+AC_DEFUN(SC_SERIAL_PORT, [
+    AC_MSG_CHECKING([termios vs. termio vs. sgtty])
+
+    AC_TRY_RUN([
+#include <termios.h>
+
+main()
+{
+    struct termios t;
+    if (tcgetattr(0, &t) == 0) {
+	cfsetospeed(&t, 0);
+	t.c_cflag |= PARENB | PARODD | CSIZE | CSTOPB;
+	return 0;
+    }
+    return 1;
+}], tk_ok=termios, tk_ok=no, tk_ok=no)
+
+    if test $tk_ok = termios; then
+	AC_DEFINE(USE_TERMIOS)
+    else
+	AC_TRY_RUN([
+#include <termio.h>
+
+main()
+{
+    struct termio t;
+    if (ioctl(0, TCGETA, &t) == 0) {
+	t.c_cflag |= CBAUD | PARENB | PARODD | CSIZE | CSTOPB;
+	return 0;
+    }
+    return 1;
+    }], tk_ok=termio, tk_ok=no, tk_ok=no)
+
+    if test $tk_ok = termio; then
+	AC_DEFINE(USE_TERMIO)
+    else
+	AC_TRY_RUN([
+#include <sgtty.h>
+
+main()
+{
+    struct sgttyb t;
+    if (ioctl(0, TIOCGETP, &t) == 0) {
+	t.sg_ospeed = 0;
+	t.sg_flags |= ODDP | EVENP | RAW;
+	return 0;
+    }
+    return 1;
+}], tk_ok=sgtty, tk_ok=none, tk_ok=none)
+    if test $tk_ok = sgtty; then
+	AC_DEFINE(USE_SGTTY)
+    fi
+    fi
+    fi
+    AC_MSG_RESULT($tk_ok)
+])
+
+#--------------------------------------------------------------------
+# SC_MISSING_POSIX_HEADERS
+#
+#	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
+#
+# Arguments:
+#	none
+#	
+# Results:
+#
+#	Defines some of the following vars:
+#		NO_DIRENT_H
+#		NO_ERRNO_H
+#		NO_VALUES_H
+#		NO_LIMITS_H
+#		NO_STDLIB_H
+#		NO_STRING_H
+#		NO_SYS_WAIT_H
+#		NO_DLFCN_H
+#		HAVE_UNISTD_H
+#		HAVE_SYS_PARAM_H
+#
+#		HAVE_STRING_H ?
+#
+#--------------------------------------------------------------------
+
+AC_DEFUN(SC_MISSING_POSIX_HEADERS, [
+
+    AC_MSG_CHECKING(dirent.h)
+    AC_TRY_LINK([#include <sys/types.h>
+#include <dirent.h>], [
+#ifndef _POSIX_SOURCE
+#   ifdef __Lynx__
+	/*
+	 * Generate compilation error to make the test fail:  Lynx headers
+	 * are only valid if really in the POSIX environment.
+	 */
+
+	missing_procedure();
+#   endif
+#endif
+DIR *d;
+struct dirent *entryPtr;
+char *p;
+d = opendir("foobar");
+entryPtr = readdir(d);
+p = entryPtr->d_name;
+closedir(d);
+], tcl_ok=yes, tcl_ok=no)
+
+    if test $tcl_ok = no; then
+	AC_DEFINE(NO_DIRENT_H)
+    fi
+
+    AC_MSG_RESULT($tcl_ok)
+    AC_CHECK_HEADER(errno.h, , AC_DEFINE(NO_ERRNO_H))
+    AC_CHECK_HEADER(float.h, , AC_DEFINE(NO_FLOAT_H))
+    AC_CHECK_HEADER(values.h, , AC_DEFINE(NO_VALUES_H))
+    AC_CHECK_HEADER(limits.h, , AC_DEFINE(NO_LIMITS_H))
+    AC_CHECK_HEADER(stdlib.h, tcl_ok=1, tcl_ok=0)
+    AC_EGREP_HEADER(strtol, stdlib.h, , tcl_ok=0)
+    AC_EGREP_HEADER(strtoul, stdlib.h, , tcl_ok=0)
+    AC_EGREP_HEADER(strtod, stdlib.h, , tcl_ok=0)
+    if test $tcl_ok = 0; then
+	AC_DEFINE(NO_STDLIB_H)
+    fi
+    AC_CHECK_HEADER(string.h, tcl_ok=1, tcl_ok=0)
+    AC_EGREP_HEADER(strstr, string.h, , tcl_ok=0)
+    AC_EGREP_HEADER(strerror, string.h, , tcl_ok=0)
+
+    # See also memmove check below for a place where NO_STRING_H can be
+    # set and why.
+
+    if test $tcl_ok = 0; then
+	AC_DEFINE(NO_STRING_H)
+    fi
+
+    AC_CHECK_HEADER(sys/wait.h, , AC_DEFINE(NO_SYS_WAIT_H))
+    AC_CHECK_HEADER(dlfcn.h, , AC_DEFINE(NO_DLFCN_H))
+
+    # OS/390 lacks sys/param.h (and doesn't need it, by chance).
+
+    AC_HAVE_HEADERS(unistd.h sys/param.h)
+
+])
+
+#--------------------------------------------------------------------
+# SC_PATH_X
+#
+#	Locate the X11 header files and the X11 library archive.  Try
+#	the ac_path_x macro first, but if it doesn't find the X stuff
+#	(e.g. because there's no xmkmf program) then check through
+#	a list of possible directories.  Under some conditions the
+#	autoconf macro will return an include directory that contains
+#	no include files, so double-check its result just to be safe.
+#
+# Arguments:
+#	none
+#	
+# Results:
+#
+#	Sets the the following vars:
+#		XINCLUDES
+#		XLIBSW
+#
+#--------------------------------------------------------------------
+
+AC_DEFUN(SC_PATH_X, [
+    AC_PATH_X
+    not_really_there=""
+    if test "$no_x" = ""; then
+	if test "$x_includes" = ""; then
+	    AC_TRY_CPP([#include <X11/XIntrinsic.h>], , not_really_there="yes")
+	else
+	    if test ! -r $x_includes/X11/Intrinsic.h; then
+		not_really_there="yes"
+	    fi
+	fi
+    fi
+    if test "$no_x" = "yes" -o "$not_really_there" = "yes"; then
+	AC_MSG_CHECKING(for X11 header files)
+	XINCLUDES="# no special path needed"
+	AC_TRY_CPP([#include <X11/Intrinsic.h>], , XINCLUDES="nope")
+	if test "$XINCLUDES" = nope; then
+	    dirs="/usr/unsupported/include /usr/local/include /usr/X386/include /usr/X11R6/include /usr/X11R5/include /usr/include/X11R5 /usr/include/X11R4 /usr/openwin/include /usr/X11/include /usr/sww/include"
+	    for i in $dirs ; do
+		if test -r $i/X11/Intrinsic.h; then
+		    AC_MSG_RESULT($i)
+		    XINCLUDES=" -I$i"
+		    break
+		fi
+	    done
+	fi
+    else
+	if test "$x_includes" != ""; then
+	    XINCLUDES=-I$x_includes
+	else
+	    XINCLUDES="# no special path needed"
+	fi
+    fi
+    if test "$XINCLUDES" = nope; then
+	AC_MSG_RESULT(couldn't find any!)
+	XINCLUDES="# no include files found"
+    fi
+
+    if test "$no_x" = yes; then
+	AC_MSG_CHECKING(for X11 libraries)
+	XLIBSW=nope
+	dirs="/usr/unsupported/lib /usr/local/lib /usr/X386/lib /usr/X11R6/lib /usr/X11R5/lib /usr/lib/X11R5 /usr/lib/X11R4 /usr/openwin/lib /usr/X11/lib /usr/sww/X11/lib"
+	for i in $dirs ; do
+	    if test -r $i/libX11.a -o -r $i/libX11.so -o -r $i/libX11.sl; then
+		AC_MSG_RESULT($i)
+		XLIBSW="-L$i -lX11"
+		x_libraries="$i"
+		break
+	    fi
+	done
+    else
+	if test "$x_libraries" = ""; then
+	    XLIBSW=-lX11
+	else
+	    XLIBSW="-L$x_libraries -lX11"
+	fi
+    fi
+    if test "$XLIBSW" = nope ; then
+	AC_CHECK_LIB(Xwindow, XCreateWindow, XLIBSW=-lXwindow)
+    fi
+    if test "$XLIBSW" = nope ; then
+	AC_MSG_RESULT(couldn't find any!  Using -lX11.)
+	XLIBSW=-lX11
+    fi
+])
+#--------------------------------------------------------------------
+# SC_BLOCKING_STYLE
+#
+#	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.
+#
+# Arguments:
+#	none
+#	
+# Results:
+#
+#	Defines some of the following vars:
+#		HAVE_SYS_IOCTL_H
+#		HAVE_SYS_FILIO_H
+#		USE_FIONBIO
+#		O_NONBLOCK
+#
+#--------------------------------------------------------------------
+
+AC_DEFUN(SC_BLOCKING_STYLE, [
+    AC_CHECK_HEADERS(sys/ioctl.h)
+    AC_CHECK_HEADERS(sys/filio.h)
+    AC_MSG_CHECKING([FIONBIO vs. O_NONBLOCK for nonblocking I/O])
+    if test -f /usr/lib/NextStep/software_version; then
+	system=NEXTSTEP-`awk '/3/,/3/' /usr/lib/NextStep/software_version`
+    else
+	system=`uname -s`-`uname -r`
+	if test "$?" -ne 0 ; then
+	    system=unknown
+	else
+	    # Special check for weird MP-RAS system (uname returns weird
+	    # results, and the version is kept in special file).
+	
+	    if test -r /etc/.relid -a "X`uname -n`" = "X`uname -s`" ; then
+		system=MP-RAS-`awk '{print $3}' /etc/.relid'`
+	    fi
+	    if test "`uname -s`" = "AIX" ; then
+		system=AIX-`uname -v`.`uname -r`
+	    fi
+	fi
+    fi
+    case $system in
+	# There used to be code here to use FIONBIO under AIX.  However, it
+	# was reported that FIONBIO doesn't work under AIX 3.2.5.  Since
+	# using O_NONBLOCK seems fine under AIX 4.*, I removed the FIONBIO
+	# code (JO, 5/31/97).
+
+	OSF*)
+	    AC_DEFINE(USE_FIONBIO)
+	    AC_MSG_RESULT(FIONBIO)
+	    ;;
+	SunOS-4*)
+	    AC_DEFINE(USE_FIONBIO)
+	    AC_MSG_RESULT(FIONBIO)
+	    ;;
+	ULTRIX-4.*)
+	    AC_DEFINE(USE_FIONBIO)
+	    AC_MSG_RESULT(FIONBIO)
+	    ;;
+	*)
+	    AC_MSG_RESULT(O_NONBLOCK)
+	    ;;
+    esac
+])
+
+#--------------------------------------------------------------------
+# SC_HAVE_VFORK
+#
+#	Check to see whether the system provides a vfork kernel call.
+#	If not, then use fork instead.  Also, check for a problem with
+#	vforks and signals that can cause core dumps if a vforked child
+#	resets a signal handler.  If the problem exists, then use fork
+#	instead of vfork.
+#
+# Arguments:
+#	none
+#	
+# Results:
+#
+#	Defines some of the following vars:
+#		vfork (=fork)
+#
+#--------------------------------------------------------------------
+
+AC_DEFUN(SC_HAVE_VFORK, [
+    AC_TYPE_SIGNAL()
+    AC_CHECK_FUNC(vfork, tcl_ok=1, tcl_ok=0)
+    if test "$tcl_ok" = 1; then
+	AC_MSG_CHECKING([vfork/signal bug]);
+	AC_TRY_RUN([
+#include <stdio.h>
+#include <signal.h>
+#include <sys/wait.h>
+int gotSignal = 0;
+sigProc(sig)
+    int sig;
+{
+    gotSignal = 1;
+}
+main()
+{
+    int pid, sts;
+    (void) signal(SIGCHLD, sigProc);
+    pid = vfork();
+    if (pid <  0) {
+	exit(1);
+    } else if (pid == 0) {
+	(void) signal(SIGCHLD, SIG_DFL);
+	_exit(0);
+    } else {
+	(void) wait(&sts);
+    }
+    exit((gotSignal) ? 0 : 1);
+}], tcl_ok=1, tcl_ok=0, tcl_ok=0)
+
+	if test "$tcl_ok" = 1; then
+	    AC_MSG_RESULT(ok)
+	else
+	    AC_MSG_RESULT([buggy, using fork instead])
+	fi
+    fi
+    rm -f core
+    if test "$tcl_ok" = 0; then
+	AC_DEFINE(vfork, fork)
+    fi
+])
+
+#--------------------------------------------------------------------
+# SC_TIME_HANLDER
+#
+#	Checks how the system deals with time.h, what time structures
+#	are used on the system, and what fields the structures have.
+#
+# Arguments:
+#	none
+#	
+# Results:
+#
+#	Defines some of the following vars:
+#		USE_DELTA_FOR_TZ
+#		HAVE_TM_GMTOFF
+#		HAVE_TM_TZADJ
+#		HAVE_TIMEZONE_VAR
+#
+#--------------------------------------------------------------------
+
+AC_DEFUN(SC_TIME_HANDLER, [
+    AC_CHECK_HEADERS(sys/time.h)
+    AC_HEADER_TIME
+    AC_STRUCT_TIMEZONE
+
+    AC_MSG_CHECKING([tm_tzadj in struct tm])
+    AC_TRY_COMPILE([#include <time.h>], [struct tm tm; tm.tm_tzadj;],
+	    [AC_DEFINE(HAVE_TM_TZADJ)
+	    AC_MSG_RESULT(yes)],
+	    AC_MSG_RESULT(no))
+
+    AC_MSG_CHECKING([tm_gmtoff in struct tm])
+    AC_TRY_COMPILE([#include <time.h>], [struct tm tm; tm.tm_gmtoff;],
+	    [AC_DEFINE(HAVE_TM_GMTOFF)
+	    AC_MSG_RESULT(yes)],
+	    AC_MSG_RESULT(no))
+
+    #
+    # Its important to include time.h in this check, as some systems
+    # (like convex) have timezone functions, etc.
+    #
+    have_timezone=no
+    AC_MSG_CHECKING([long timezone variable])
+    AC_TRY_COMPILE([#include <time.h>],
+	    [extern long timezone;
+	    timezone += 1;
+	    exit (0);],
+	    [have_timezone=yes
+	    AC_DEFINE(HAVE_TIMEZONE_VAR)
+	    AC_MSG_RESULT(yes)],
+	    AC_MSG_RESULT(no))
+
+    #
+    # On some systems (eg IRIX 6.2), timezone is a time_t and not a long.
+    #
+    if test "$have_timezone" = no; then
+    AC_MSG_CHECKING([time_t timezone variable])
+    AC_TRY_COMPILE([#include <time.h>],
+	    [extern time_t timezone;
+	    timezone += 1;
+	    exit (0);],
+	    [AC_DEFINE(HAVE_TIMEZONE_VAR)
+	    AC_MSG_RESULT(yes)],
+	    AC_MSG_RESULT(no))
+    fi
+
+    #
+    # AIX does not have a timezone field in struct tm. When the AIX bsd
+    # library is used, the timezone global and the gettimeofday methods are
+    # to be avoided for timezone deduction instead, we deduce the timezone
+    # by comparing the localtime result on a known GMT value.
+    #
+
+    if test "`uname -s`" = "AIX" ; then
+	AC_CHECK_LIB(bsd, gettimeofday, libbsd=yes)
+	if test $libbsd = yes; then
+	    AC_DEFINE(USE_DELTA_FOR_TZ)
+	fi
     fi
 ])
 
+#--------------------------------------------------------------------
+# SC_BUGGY_STRTOD
+#
+#	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" (provided by Tcl) that corrects the error.
+#
+# Arguments:
+#	none
+#	
+# Results:
+#
+#	Might defines some of the following vars:
+#		strtod (=fixstrtod)
+#
+#--------------------------------------------------------------------
+
+AC_DEFUN(SC_BUGGY_STRTOD, [
+    AC_CHECK_FUNC(strtod, tk_strtod=1, tk_strtod=0)
+    if test "$tk_strtod" = 1; then
+	AC_MSG_CHECKING([for Solaris 2.4 strtod bug])
+	AC_TRY_RUN([
+	    extern double strtod();
+	    int main()
+	    {
+		char *string = "NaN";
+		char *term;
+		strtod(string, &term);
+		if ((term != string) && (term[-1] == 0)) {
+		    exit(1);
+		}
+		exit(0);
+	    }], tk_ok=1, tk_ok=0, tk_ok=0)
+	if test "$tk_ok" = 1; then
+	    AC_MSG_RESULT(ok)
+	else
+	    AC_MSG_RESULT(buggy)
+	    AC_DEFINE(strtod, fixstrtod)
+	fi
+    fi
+])
+
+#--------------------------------------------------------------------
+# SC_TCL_LINK_LIBS
+#
+#	Search for the libraries needed to link the Tcl shell.
+#	Things like the math library (-lm) and socket stuff (-lsocket vs.
+#	-lnsl) are dealt with here.
+#
+# Arguments:
+#	Requires the following vars to be set in the Makefile:
+#		DL_LIBS
+#		LIBS
+#		MATH_LIBS
+#	
+# Results:
+#
+#	Subst's the following var:
+#		TCL_LIBS
+#		MATH_LIBS
+#
+#	Might append to the following vars:
+#		LIBS
+#
+#	Might define the following vars:
+#		HAVE_NET_ERRNO_H
+#
+#--------------------------------------------------------------------
+
+AC_DEFUN(SC_TCL_LINK_LIBS, [
+    #--------------------------------------------------------------------
+    # On a few very rare systems, all of the libm.a stuff is
+    # already in libc.a.  Set compiler flags accordingly.
+    # Also, Linux requires the "ieee" library for math to work
+    # right (and it must appear before "-lm").
+    #--------------------------------------------------------------------
+
+    AC_CHECK_FUNC(sin, MATH_LIBS="", MATH_LIBS="-lm")
+    AC_CHECK_LIB(ieee, main, [MATH_LIBS="-lieee $MATH_LIBS"])
+
+    #--------------------------------------------------------------------
+    # On AIX systems, libbsd.a has to be linked in to support
+    # non-blocking file IO.  This library has to be linked in after
+    # the MATH_LIBS or it breaks the pow() function.  The way to
+    # insure proper sequencing, is to add it to the tail of MATH_LIBS.
+    # This library also supplies gettimeofday.
+    #--------------------------------------------------------------------
+
+    libbsd=no
+    if test "`uname -s`" = "AIX" ; then
+	AC_CHECK_LIB(bsd, gettimeofday, libbsd=yes)
+	if test $libbsd = yes; then
+	    MATH_LIBS="$MATH_LIBS -lbsd"
+	fi
+    fi
+
+
+    #--------------------------------------------------------------------
+    # Interactive UNIX requires -linet instead of -lsocket, plus it
+    # needs net/errno.h to define the socket-related error codes.
+    #--------------------------------------------------------------------
+
+    AC_CHECK_LIB(inet, main, [LIBS="$LIBS -linet"])
+    AC_CHECK_HEADER(net/errno.h, AC_DEFINE(HAVE_NET_ERRNO_H))
+
+    #--------------------------------------------------------------------
+    #	Check for the existence of the -lsocket and -lnsl libraries.
+    #	The order here is important, so that they end up in the right
+    #	order in the command line generated by make.  Here are some
+    #	special considerations:
+    #	1. Use "connect" and "accept" to check for -lsocket, and
+    #	   "gethostbyname" to check for -lnsl.
+    #	2. Use each function name only once:  can't redo a check because
+    #	   autoconf caches the results of the last check and won't redo it.
+    #	3. Use -lnsl and -lsocket only if they supply procedures that
+    #	   aren't already present in the normal libraries.  This is because
+    #	   IRIX 5.2 has libraries, but they aren't needed and they're
+    #	   bogus:  they goof up name resolution if used.
+    #	4. On some SVR4 systems, can't use -lsocket without -lnsl too.
+    #	   To get around this problem, check for both libraries together
+    #	   if -lsocket doesn't work by itself.
+    #--------------------------------------------------------------------
+
+    tcl_checkBoth=0
+    AC_CHECK_FUNC(connect, tcl_checkSocket=0, tcl_checkSocket=1)
+    if test "$tcl_checkSocket" = 1; then
+	AC_CHECK_LIB(socket, main, LIBS="$LIBS -lsocket", tcl_checkBoth=1)
+    fi
+    if test "$tcl_checkBoth" = 1; then
+	tk_oldLibs=$LIBS
+	LIBS="$LIBS -lsocket -lnsl"
+	AC_CHECK_FUNC(accept, tcl_checkNsl=0, [LIBS=$tk_oldLibs])
+    fi
+    AC_CHECK_FUNC(gethostbyname, , AC_CHECK_LIB(nsl, main,
+	    [LIBS="$LIBS -lnsl"]))
+    
+    # Don't perform the eval of the libraries here because DL_LIBS
+    # won't be set until we call SC_CONFIG_CFLAGS
+
+    TCL_LIBS='${DL_LIBS} ${LIBS} ${MATH_LIBS}'
+    AC_SUBST(TCL_LIBS)
+    AC_SUBST(MATH_LIBS)
+])
 
 #--------------------------------------------------------------------
-# SC_TCL_CONFIG_CFLAGS
+# SC_CONFIG_CFLAGS
 #
 #	Try to determine the proper flags to pass to the compiler
 #	for building shared libraries and other such nonsense.
@@ -557,10 +1095,30 @@ AC_DEFUN(SC_ENABLE_SYMBOLS, [
 #			Flags used when running the compiler in debug mode
 #	CFLAGS_OPTIMIZE -
 #			Flags used when running the compiler in optimize mode
+#
+#	EXTRA_CFLAGS
+#
+#	Subst's the following vars:
+#		DL_LIBS
+#		CFLAGS_DEBUG
+#		CFLAGS_OPTIMIZE
 #--------------------------------------------------------------------
 
-AC_DEFUN(SC_TCL_CONFIG_CFLAGS, [
+AC_DEFUN(SC_CONFIG_CFLAGS, [
+
+    # Step 0: Enable 64 bit support?
 
+    AC_MSG_CHECKING([if 64bit support is enabled])
+    AC_ARG_ENABLE(64bit,[  --enable-64bit          enable 64bit support],,enableval="no")
+
+    if test "$enableval" = "yes"; then
+	AC_MSG_RESULT(Will compile with 64bit support)
+	do64bit=yes
+    else
+	do64bit=no
+    fi
+    AC_MSG_RESULT($do64bit)
+ 
     # Step 1: set the variable "system" to hold the name and version number
     # for the system.  This can usually be done via the "uname" command, but
     # there are a few systems, like Next, where this doesn't work.
@@ -1111,4 +1669,8 @@ AC_DEFUN(SC_TCL_CONFIG_CFLAGS, [
 	    esac
 	fi
     fi
+
+    AC_SUBST(DL_LIBS)
+    AC_SUBST(CFLAGS_DEBUG)
+    AC_SUBST(CFLAGS_OPTIMIZE)
 ])