tcl.m4

tcl是工具命令语言

	    fi
	fi

	# Does the pthread-implementation provide
	# 'pthread_attr_setstacksize' ?

	ac_saved_libs=$LIBS
	LIBS="$LIBS $THREADS_LIBS"
	AC_CHECK_FUNCS(pthread_attr_setstacksize)
	LIBS=$ac_saved_libs
	AC_CHECK_FUNCS(readdir_r)
    else
	TCL_THREADS=0
	AC_MSG_RESULT([no (default)])
    fi
    AC_SUBST(TCL_THREADS)
])

#------------------------------------------------------------------------
# SC_ENABLE_SYMBOLS --
#
#	Specify if debugging symbols should be used.
#	Memory (TCL_MEM_DEBUG) and compile (TCL_COMPILE_DEBUG) debugging
#	can also be enabled.
#
# Arguments:
#	none
#	
#	Requires the following vars to be set in the Makefile:
#		CFLAGS_DEBUG
#		CFLAGS_OPTIMIZE
#		LDFLAGS_DEBUG
#		LDFLAGS_OPTIMIZE
#	
# Results:
#
#	Adds the following arguments to configure:
#		--enable-symbols
#
#	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=$enableval], [tcl_ok=no])
# FIXME: Currently, LDFLAGS_DEFAULT is not used, it should work like CFLAGS_DEFAULT.
    if test "$tcl_ok" = "no"; then
	CFLAGS_DEFAULT='$(CFLAGS_OPTIMIZE)'
	LDFLAGS_DEFAULT='$(LDFLAGS_OPTIMIZE)'
	DBGX=""
	AC_MSG_RESULT([no])
    else
	CFLAGS_DEFAULT='$(CFLAGS_DEBUG)'
	LDFLAGS_DEFAULT='$(LDFLAGS_DEBUG)'
	DBGX=g
	if test "$tcl_ok" = "yes"; then
	    AC_MSG_RESULT([yes (standard debugging)])
	fi
    fi
    AC_SUBST(CFLAGS_DEFAULT)
    AC_SUBST(LDFLAGS_DEFAULT)

    if test "$tcl_ok" = "mem" -o "$tcl_ok" = "all"; then
	AC_DEFINE(TCL_MEM_DEBUG)
    fi

    if test "$tcl_ok" = "compile" -o "$tcl_ok" = "all"; then
	AC_DEFINE(TCL_COMPILE_DEBUG)
	AC_DEFINE(TCL_COMPILE_STATS)
    fi

    if test "$tcl_ok" != "yes" -a "$tcl_ok" != "no"; then
	if test "$tcl_ok" = "all"; then
	    AC_MSG_RESULT([enabled symbols mem compile debugging])
	else
	    AC_MSG_RESULT([enabled $tcl_ok debugging])
	fi
    fi
])

#------------------------------------------------------------------------
# SC_ENABLE_LANGINFO --
#
#	Allows use of modern nl_langinfo check for better l10n.
#	This is only relevant for Unix.
#
# Arguments:
#	none
#	
# Results:
#
#	Adds the following arguments to configure:
#		--enable-langinfo=yes|no (default is yes)
#
#	Defines the following vars:
#		HAVE_LANGINFO	Triggers use of nl_langinfo if defined.
#
#------------------------------------------------------------------------

AC_DEFUN(SC_ENABLE_LANGINFO, [
    AC_ARG_ENABLE(langinfo,
	[  --enable-langinfo	  use nl_langinfo if possible to determine
			  encoding at startup, otherwise use old heuristic],
	[langinfo_ok=$enableval], [langinfo_ok=yes])

    HAVE_LANGINFO=0
    if test "$langinfo_ok" = "yes"; then
	if test "$langinfo_ok" = "yes"; then
	    AC_CHECK_HEADER(langinfo.h,[langinfo_ok=yes],[langinfo_ok=no])
	fi
    fi
    AC_MSG_CHECKING([whether to use nl_langinfo])
    if test "$langinfo_ok" = "yes"; then
	AC_TRY_COMPILE([#include <langinfo.h>],
		[nl_langinfo(CODESET);],[langinfo_ok=yes],[langinfo_ok=no])
	if test "$langinfo_ok" = "no"; then
	    langinfo_ok="no (could not compile with nl_langinfo)";
	fi
	if test "$langinfo_ok" = "yes"; then
	    AC_DEFINE(HAVE_LANGINFO)
	fi
    fi
    AC_MSG_RESULT([$langinfo_ok])
])

#--------------------------------------------------------------------
# SC_CONFIG_MANPAGES
#	
#	Decide whether to use symlinks for linking the manpages and
#	whether to compress the manpages after installation.
#
# Arguments:
#	none
#
# Results:
#
#	Adds the following arguments to configure:
#		--enable-man-symlinks
#		--enable-man-compression=PROG
#
#	Defines the following variable:
#
#	MKLINKS_FLAGS -		The apropriate flags for mkLinks
#				according to the user's selection.
#
#--------------------------------------------------------------------
AC_DEFUN(SC_CONFIG_MANPAGES, [

	AC_MSG_CHECKING([whether to use symlinks for manpages])
	AC_ARG_ENABLE(man-symlinks,
		[  --enable-man-symlinks   use symlinks for the manpages],
		test "$enableval" != "no" && MKLINKS_FLAGS="$MKLINKS_FLAGS --symlinks",
		enableval="no")
	AC_MSG_RESULT([$enableval])

	AC_MSG_CHECKING([compression for manpages])
	AC_ARG_ENABLE(man-compression,
		[  --enable-man-compression=PROG
                          compress the manpages with PROG],
		test "$enableval" = "yes" && echo && AC_MSG_ERROR([missing argument to --enable-man-compression])
		test "$enableval" != "no" && MKLINKS_FLAGS="$MKLINKS_FLAGS --compress $enableval",
		enableval="no")
	AC_MSG_RESULT([$enableval])

	AC_SUBST(MKLINKS_FLAGS)
])

#--------------------------------------------------------------------
# SC_CONFIG_CFLAGS
#
#	Try to determine the proper flags to pass to the compiler
#	for building shared libraries and other such nonsense.
#
# Arguments:
#	none
#
# Results:
#
#	Defines and substitutes the following vars:
#
#       DL_OBJS -       Name of the object file that implements dynamic
#                       loading for Tcl on this system.
#       DL_LIBS -       Library file(s) to include in tclsh and other base
#                       applications in order for the "load" command to work.
#       LDFLAGS -      Flags to pass to the compiler when linking object
#                       files into an executable application binary such
#                       as tclsh.
#       LD_SEARCH_FLAGS-Flags to pass to ld, such as "-R /usr/local/tcl/lib",
#                       that tell the run-time dynamic linker where to look
#                       for shared libraries such as libtcl.so.  Depends on
#                       the variable LIB_RUNTIME_DIR in the Makefile. Could
#                       be the same as CC_SEARCH_FLAGS if ${CC} is used to link.
#       CC_SEARCH_FLAGS-Flags to pass to ${CC}, such as "-Wl,-rpath,/usr/local/tcl/lib",
#                       that tell the run-time dynamic linker where to look
#                       for shared libraries such as libtcl.so.  Depends on
#                       the variable LIB_RUNTIME_DIR in the Makefile.
#       MAKE_LIB -      Command to execute to build the a library;
#                       differs when building shared or static.
#       MAKE_STUB_LIB -
#                       Command to execute to build a stub library.
#       INSTALL_LIB -   Command to execute to install a library;
#                       differs when building shared or static.
#       INSTALL_STUB_LIB -
#                       Command to execute to install a stub library.
#       STLIB_LD -      Base command to use for combining object files
#                       into a static library.
#       SHLIB_CFLAGS -  Flags to pass to cc when compiling the components
#                       of a shared library (may request position-independent
#                       code, among other things).
#       SHLIB_LD -      Base command to use for combining object files
#                       into a shared library.
#       SHLIB_LD_FLAGS -Flags to pass when building a shared library. This
#                       differes from the SHLIB_CFLAGS as it is not used
#                       when building object files or executables.
#       SHLIB_LD_LIBS - Dependent libraries for the linker to scan when
#                       creating shared libraries.  This symbol typically
#                       goes at the end of the "ld" commands that build
#                       shared libraries. The value of the symbol is
#                       "${LIBS}" if all of the dependent libraries should
#                       be specified when creating a shared library.  If
#                       dependent libraries should not be specified (as on
#                       SunOS 4.x, where they cause the link to fail, or in
#                       general if Tcl and Tk aren't themselves shared
#                       libraries), then this symbol has an empty string
#                       as its value.
#       SHLIB_SUFFIX -  Suffix to use for the names of dynamically loadable
#                       extensions.  An empty string means we don't know how
#                       to use shared libraries on this platform.
# TCL_SHLIB_LD_EXTRAS - Additional element which are added to SHLIB_LD_LIBS
#  TK_SHLIB_LD_EXTRAS   for the build of Tcl and Tk, but not recorded in the
#                       tclConfig.sh, since they are only used for the build
#                       of Tcl and Tk. 
#                       Examples: MacOS X records the library version and
#                       compatibility version in the shared library.  But
#                       of course the Tcl version of this is only used for Tcl.
#       LIB_SUFFIX -    Specifies everything that comes after the "libfoo"
#                       in a static or shared library name, using the $VERSION variable
#                       to put the version in the right place.  This is used
#                       by platforms that need non-standard library names.
#                       Examples:  ${VERSION}.so.1.1 on NetBSD, since it needs
#                       to have a version after the .so, and ${VERSION}.a
#                       on AIX, since a shared library needs to have
#                       a .a extension whereas shared objects for loadable
#                       extensions have a .so extension.  Defaults to
#                       ${VERSION}${SHLIB_SUFFIX}.
#       TCL_NEEDS_EXP_FILE -
#                       1 means that an export file is needed to link to a
#                       shared library.
#       TCL_EXP_FILE -  The name of the installed export / import file which
#                       should be used to link to the Tcl shared library.
#                       Empty if Tcl is unshared.
#       TCL_BUILD_EXP_FILE -
#                       The name of the built export / import file which
#                       should be used to link to the Tcl shared library.
#                       Empty if Tcl is unshared.
#	CFLAGS_DEBUG -
#			Flags used when running the compiler in debug mode
#	CFLAGS_OPTIMIZE -
#			Flags used when running the compiler in optimize mode
#	EXTRA_CFLAGS
#
#--------------------------------------------------------------------

AC_DEFUN(SC_CONFIG_CFLAGS, [

    # Step 0.a: Enable 64 bit support?

    AC_MSG_CHECKING([if 64bit support is requested])
    AC_ARG_ENABLE(64bit,[  --enable-64bit          enable 64bit support (where applicable)],,enableval="no")

    if test "$enableval" = "yes"; then
	do64bit=yes
    else
	do64bit=no
    fi
    AC_MSG_RESULT($do64bit)

    # Step 0.b: Enable Solaris 64 bit VIS support?

    AC_MSG_CHECKING([if 64bit Sparc VIS support is requested])
    AC_ARG_ENABLE(64bit-vis,[  --enable-64bit-vis      enable 64bit Sparc VIS support],,enableval="no")

    if test "$enableval" = "yes"; then
	# Force 64bit on with VIS
	do64bit=yes
	do64bitVIS=yes
    else
	do64bitVIS=no
    fi
    AC_MSG_RESULT($do64bitVIS)

    # 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.

    AC_MSG_CHECKING([system version (for dynamic loading)])
    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
	    AC_MSG_RESULT([unknown (can't find uname command)])
	    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 $3}' /etc/.relid'`
	    fi
	    if test "`uname -s`" = "AIX" ; then
		system=AIX-`uname -v`.`uname -r`
	    fi
	    AC_MSG_RESULT($system)
	fi
    fi

    # Step 2: check for existence of -ldl library.  This is needed because
    # Linux can use either -ldl or -ldld for dynamic loading.

    AC_CHECK_LIB(dl, dlopen, have_dl=yes, have_dl=no)

    # Require ranlib early so we can override it in special cases below.

    AC_REQUIRE([AC_PROG_RANLIB])

    # Step 3: set configuration options based on system name and version.

    do64bit_ok=no
    EXTRA_CFLAGS=""
    TCL_EXPORT_FILE_SUFFIX=""
    UNSHARED_LIB_SUFFIX=""
    TCL_TRIM_DOTS='`echo ${VERSION} | tr -d .`'
    ECHO_VERSION='`echo ${VERSION}`'
    TCL_LIB_VERSIONS_OK=ok
    CFLAGS_DEBUG=-g
    CFLAGS_OPTIMIZE=-O
    if test "$GCC" = "yes" ; then
	CFLAGS_WARNING="-Wall -Wconversion -Wno-implicit-int"
    else
	CFLAGS_WARNING=""
    fi
    TCL_NEEDS_EXP_FILE=0
    TCL_BUILD_EXP_FILE=""
    TCL_EXP_FILE=""
dnl FIXME: Replace AC_CHECK_PROG with AC_CHECK_TOOL once cross compiling is fixed.
dnl AC_CHECK_TOOL(AR, ar)
    AC_CHECK_PROG(AR, ar, ar)
    if test "${AR}" = "" ; then
	AC_MSG_ERROR([Required archive tool 'ar' not found on PATH.])
    fi
    STLIB_LD='${AR} cr'
    LD_LIBRARY_PATH_VAR="LD_LIBRARY_PATH"
    PLAT_OBJS=""
    case $system in
	AIX-5.*)
	    if test "${TCL_THREADS}" = "1" -a "$GCC" != "yes" ; then
		# AIX requires the _r compiler when gcc isn't being used
		if test "${CC}" != "cc_r" ; then
		    CC=${CC}_r
		fi
		AC_MSG_RESULT(Using $CC for compiling with threads)
	    fi
	    LIBS="$LIBS -lc"
	    # AIX-5 uses ELF style dynamic libraries
	    SHLIB_CFLAGS=""
	    SHLIB_LD_LIBS='${LIBS}'
	    SHLIB_SUFFIX=".so"
	    if test "`uname -m`" = "ia64" ; then
		# AIX-5 uses ELF style dynamic libraries on IA-64, but not PPC
		SHLIB_LD="/usr/ccs/bin/ld -G -z text"
		# AIX-5 has dl* in libc.so
		DL_LIBS=""
		if test "$GCC" = "yes" ; then
		    CC_SEARCH_FLAGS='-Wl,-R,${LIB_RUNTIME_DIR}'
		else
		    CC_SEARCH_FLAGS='-R${LIB_RUNTIME_DIR}'
		fi
		LD_SEARCH_FLAGS='-R ${LIB_RUNTIME_DIR}'
	    else
		SHLIB_LD="${TCL_SRC_DIR}/unix/ldAix /bin/ld -bhalt:4 -bM:SRE -bE:lib.exp -H512 -T512 -bnoentry"
		DL_LIBS="-ldl"
		CC_SEARCH_FLAGS='-L${LIB_RUNTIME_DIR}'
		LD_SEARCH_FLAGS=${CC_SEARCH_FLAGS}
		TCL_NEEDS_EXP_FILE=1
		TCL_EXPORT_FILE_SUFFIX='${VERSION}\$\{DBGX\}.exp'
	    fi

	    # Note: need the LIBS below, otherwise Tk won't find Tcl's
	    # symbols when dynamically loaded into tclsh.

	    DL_OBJS="tclLoadDl.o"
	    LDFLAGS=""

	    LD_LIBRARY_PATH_VAR="LIBPATH"

	    # Check to enable 64-bit flags for compiler/linker
	    if test "$do64bit" = "yes" ; then
		if test "$GCC" = "yes" ; then
		    AC_MSG_WARN("64bit mode not supported with GCC on $system")
		else 
		    do64bit_ok=yes
		    EXTRA_CFLAGS="-q64"
		    LDFLAGS="-q64"
		    RANLIB="${RANLIB} -X64"
		    AR="${AR} -X64"
		    SHLIB_LD_FLAGS="-b64"
		fi
	    fi
	    ;;
	AIX-*)
	    if test "${TCL_THREADS}" = "1" -a "$GCC" != "yes" ; then
		# AIX requires the _r compiler when gcc isn't being used
		if test "${CC}" != "cc_r" ; then
		    CC=${CC}_r
		fi
		AC_MSG_RESULT(Using $CC for compiling with threads)
	    fi
	    LIBS="$LIBS -lc"
	    SHLIB_CFLAGS=""
	    SHLIB_LD="${TCL_SRC_DIR}/unix/ldAix /bin/ld -bhalt:4 -bM:SRE -bE:lib.exp -H512 -T512 -bnoentry"
	    SHLIB_LD_LIBS='${LIBS}'
	    SHLIB_SUFFIX=".so"
	    DL_OBJS="tclLoadDl.o"
	    DL_LIBS="-ldl"
	    LDFLAGS=""
	    CC_SEARCH_FLAGS='-L${LIB_RUNTIME_DIR}'
	    LD_SEARCH_FLAGS=${CC_SEARCH_FLAGS}
	    LD_LIBRARY_PATH_VAR="LIBPATH"
	    TCL_NEEDS_EXP_FILE=1
	    TCL_EXPORT_FILE_SUFFIX='${VERSION}\$\{DBGX\}.exp'

	    # AIX v<=4.1 has some different flags than 4.2+
	    if test "$system" = "AIX-4.1" -o "`uname -v`" -lt "4" ; then
		LIBOBJS="$LIBOBJS tclLoadAix.o"
		DL_LIBS="-lld"
	    fi

	    # On AIX <=v4 systems, libbsd.a has to be linked in to support
	    # non-blocking file IO.  This library has to be linked in after