configure.in

linux系统下的音频通信

	SHLIB_LD_LIBS=""
	SHLIB_SUFFIX=".so"
	DL_OBJS="tclLoadDl.o"
	DL_LIBS=""
	LD_FLAGS=""
	LD_SEARCH_FLAGS=""
	;;
    OSF1-V*)
        # Digital OSF/1
	SHLIB_CFLAGS=""
	SHLIB_LD='ld -shared -expect_unresolved "*"'
	SHLIB_LD_LIBS=""
	SHLIB_SUFFIX=".so"
	DL_OBJS="tclLoadDl.o"
	DL_LIBS=""
	LD_FLAGS=""
	LD_SEARCH_FLAGS='-Wl,-rpath,${LIB_RUNTIME_DIR}'
	;;
    RISCos-*)
	SHLIB_CFLAGS="-G 0"
	SHLIB_LD="echo tclLdAout $CC \{$SHLIB_CFLAGS\} | `pwd`/tclsh -r -G 0"
	SHLIB_LD_LIBS='${LIBS}'
	SHLIB_SUFFIX=".a"
	DL_OBJS="tclLoadAout.o"
	DL_LIBS=""
	LD_FLAGS="-Wl,-D,08000000"
	LD_SEARCH_FLAGS='-L${LIB_RUNTIME_DIR}'
	;;
    SCO_SV-3.2*)
        # Note, dlopen is available only on SCO 3.2.5 and greater.  However,
        # this test works, since "uname -s" was non-standard in 3.2.4 and
        # below.
	SHLIB_CFLAGS="-Kpic -belf"
	SHLIB_LD="ld -G"
	SHLIB_LD_LIBS=""
	SHLIB_SUFFIX=".so"
	DL_OBJS="tclLoadDl.o"
	DL_LIBS=""
	LD_FLAGS="-belf -Wl,-Bexport"
	LD_SEARCH_FLAGS=""
	;;
     SINIX*5.4*)
	SHLIB_CFLAGS="-K PIC"
	SHLIB_LD="cc -G"
	SHLIB_LD_LIBS=""
	SHLIB_SUFFIX=".so"
	DL_OBJS="tclLoadDl.o"
	DL_LIBS="-ldl"
	LD_FLAGS=""
	LD_SEARCH_FLAGS=""
	;;
    SunOS-4*)
	SHLIB_CFLAGS="-PIC"
	SHLIB_LD="ld"
	SHLIB_LD_LIBS=""
	SHLIB_SUFFIX=".so"
	DL_OBJS="tclLoadDl.o"
	DL_LIBS="-ldl"
	LD_FLAGS=""
	LD_SEARCH_FLAGS='-L${LIB_RUNTIME_DIR}'

	# SunOS can't handle version numbers with dots in them in library
	# specs, like -ltcl7.5, so use -ltcl75 instead.  Also, it
	# requires an extra version number at the end of .so file names.
	# So, the library has to have a name like libtcl75.so.1.0

	TCL_SHARED_LIB_SUFFIX='${TCL_TRIM_DOTS}\$\{DBGX\}.so.1.0'
	TCL_UNSHARED_LIB_SUFFIX='${TCL_TRIM_DOTS}\$\{DBGX\}.a'
	TCL_LIB_VERSIONS_OK=nodots
	;;
    SunOS-5*)
	SHLIB_CFLAGS="-KPIC"
	SHLIB_LD="/usr/ccs/bin/ld -G -z text"

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

	SHLIB_LD_LIBS='${LIBS}'
	SHLIB_SUFFIX=".so"
	DL_OBJS="tclLoadDl.o"
	DL_LIBS="-ldl"
	LD_FLAGS=""
	LD_SEARCH_FLAGS='-R ${LIB_RUNTIME_DIR}'
	;;
    ULTRIX-4.*)
	SHLIB_CFLAGS="-G 0"
	SHLIB_SUFFIX=".a"
	SHLIB_LD="echo tclLdAout $CC \{$SHLIB_CFLAGS\} | `pwd`/tclsh -r -G 0"
	SHLIB_LD_LIBS='${LIBS}'
	DL_OBJS="tclLoadAout.o"
	DL_LIBS=""
	LD_FLAGS="-Wl,-D,08000000"
	LD_SEARCH_FLAGS='-L${LIB_RUNTIME_DIR}'
	;;
    UNIX_SV* | UnixWare-5*)
	SHLIB_CFLAGS="-KPIC"
	SHLIB_LD="cc -G"
	SHLIB_LD_LIBS=""
	SHLIB_SUFFIX=".so"
	DL_OBJS="tclLoadDl.o"
	DL_LIBS="-ldl"
	# Some UNIX_SV* systems (unixware 1.1.2 for example) have linkers
	# that don't grok the -Bexport option.  Test that it does.
	hold_ldflags=$LDFLAGS
	AC_MSG_CHECKING(for ld accepts -Bexport flag)
	LDFLAGS="${LDFLAGS} -Wl,-Bexport"
	AC_TRY_LINK(, [int i;], found=yes, found=no)
	LDFLAGS=$hold_ldflags
	AC_MSG_RESULT($found)
	if test $found = yes; then
	  LD_FLAGS="-Wl,-Bexport"
	else
	  LD_FLAGS=""
	fi
	LD_SEARCH_FLAGS=""
	;;
esac

# Step 4: If pseudo-static linking is in use (see K. B. Kenny, "Dynamic
# Loading for Tcl -- What Became of It?".  Proc. 2nd Tcl/Tk Workshop,
# New Orleans, LA, Computerized Processes Unlimited, 1994), then we need
# to determine which of several header files defines the a.out file
# format (a.out.h, sys/exec.h, or sys/exec_aout.h).  At present, we
# support only a file format that is more or less version-7-compatible. 
# In particular,
#	- a.out files must begin with `struct exec'.
#	- the N_TXTOFF on the `struct exec' must compute the seek address
#	  of the text segment
#	- The `struct exec' must contain a_magic, a_text, a_data, a_bss
#	  and a_entry fields.
# The following compilation should succeed if and only if either sys/exec.h
# or a.out.h is usable for the purpose.
#
# Note that the modified COFF format used on MIPS Ultrix 4.x is usable; the
# `struct exec' includes a second header that contains information that
# duplicates the v7 fields that are needed.

if test "x$DL_OBJS" = "xtclLoadAout.o" ; then
    AC_MSG_CHECKING(sys/exec.h)
    AC_TRY_COMPILE([#include <sys/exec.h>],[
	struct exec foo;
	unsigned long seek;
	int flag;
#if defined(__mips) || defined(mips)
	seek = N_TXTOFF (foo.ex_f, foo.ex_o);
#else
	seek = N_TXTOFF (foo);
#endif
	flag = (foo.a_magic == OMAGIC);
	return foo.a_text + foo.a_data + foo.a_bss + foo.a_entry;
], tcl_ok=usable, tcl_ok=unusable)
    AC_MSG_RESULT($tcl_ok)
    if test $tcl_ok = usable; then
	AC_DEFINE(USE_SYS_EXEC_H)
    else
	AC_MSG_CHECKING(a.out.h)
	AC_TRY_COMPILE([#include <a.out.h>],[
	    struct exec foo;
	    unsigned long seek;
	    int flag;
#if defined(__mips) || defined(mips)
	    seek = N_TXTOFF (foo.ex_f, foo.ex_o);
#else
	    seek = N_TXTOFF (foo);
#endif
	    flag = (foo.a_magic == OMAGIC);
	    return foo.a_text + foo.a_data + foo.a_bss + foo.a_entry;
	], tcl_ok=usable, tcl_ok=unusable)
	AC_MSG_RESULT($tcl_ok)
	if test $tcl_ok = usable; then
	    AC_DEFINE(USE_A_OUT_H)
	else
	    AC_MSG_CHECKING(sys/exec_aout.h)
	    AC_TRY_COMPILE([#include <sys/exec_aout.h>],[
		struct exec foo;
		unsigned long seek;
		int flag;
#if defined(__mips) || defined(mips)
		seek = N_TXTOFF (foo.ex_f, foo.ex_o);
#else
		seek = N_TXTOFF (foo);
#endif
		flag = (foo.a_midmag == OMAGIC);
		return foo.a_text + foo.a_data + foo.a_bss + foo.a_entry;
	    ], tcl_ok=usable, tcl_ok=unusable)
	    AC_MSG_RESULT($tcl_ok)
	    if test $tcl_ok = usable; then
		AC_DEFINE(USE_SYS_EXEC_AOUT_H)
	    else
		DL_OBJS=""
	    fi
	fi
    fi
fi

# Step 5: disable dynamic loading if requested via a command-line switch.

#AC_ARG_ENABLE(load, [  --disable-load          disallow dynamic loading and "load" command],
#    [tcl_ok=$enableval], [tcl_ok=yes])
#if test "$tcl_ok" = "no"; then
#    DL_OBJS=""
#fi
#
#if test "x$DL_OBJS" != "x" ; then
#    BUILD_DLTEST="\$(DLTEST_TARGETS)"
#else
    echo "Dynamic loading and shared libraries are disabled."
    SHLIB_CFLAGS=""
    SHLIB_LD=""
    SHLIB_SUFFIX=""
    DL_OBJS="tclLoadNone.o"
    DL_LIBS=""
    LD_FLAGS=""
    LD_SEARCH_FLAGS=""
    BUILD_DLTEST=""
#fi

# If we're running gcc, then change the C flags for compiling shared
# libraries to the right flags for gcc, instead of those for the
# standard manufacturer compiler.

if test "$DL_OBJS" != "tclLoadNone.o" ; then
    if test "$CC" = "gcc" -o `$CC -v 2>&1 | grep -c gcc` != "0" ; then
	case $system in
	    AIX-*)
		;;
	    BSD/OS*)
		;;
	    IRIX*)
		;;
	    NetBSD-*|FreeBSD-*|OpenBSD-*)
		;;
	    RISCos-*)
		;;
	    ULTRIX-4.*)
		;;
	    *)
		SHLIB_CFLAGS="-fPIC"
		;;
	esac
    fi
fi

# Set the default compiler switches based on the --enable-symbols option

AC_ARG_ENABLE(symbols, [  --enable-symbols        build with debugging symbols],
    [tcl_ok=$enableval], [tcl_ok=no])
if test "$tcl_ok" = "yes"; then
    CFLAGS_DEFAULT=CFLAGS_DEBUG
    TCL_DBGX=g
else
    CFLAGS_DEFAULT=CFLAGS_OPTIMIZE
    TCL_DBGX=""
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.
#--------------------------------------------------------------------

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

#--------------------------------------------------------------------
#	The statements below define a collection of symbols related to
#	building libtcl as a shared library instead of a static library.
#--------------------------------------------------------------------

realRanlib=$RANLIB
if test "$TCL_SHARED_LIB_SUFFIX" = "" ; then
    TCL_SHARED_LIB_SUFFIX='${VERSION}\$\{DBGX\}${SHLIB_SUFFIX}'
fi
if test "$TCL_UNSHARED_LIB_SUFFIX" = "" ; then
    TCL_UNSHARED_LIB_SUFFIX='${VERSION}\$\{DBGX\}.a'
fi
#AC_ARG_ENABLE(shared,
#    [  --enable-shared         build libtcl as a shared library],
#    [tcl_ok=$enableval], [tcl_ok=no])
#if test "$tcl_ok" = "yes" -a "${SHLIB_SUFFIX}" != "" ; then
#    TCL_SHARED_BUILD=1
#    TCL_SHLIB_CFLAGS="${SHLIB_CFLAGS}"
#    TCL_LD_SEARCH_FLAGS="${LD_SEARCH_FLAGS}"
#    eval "TCL_LIB_FILE=libtcl${TCL_SHARED_LIB_SUFFIX}"
#    if test "x$DL_OBJS" = "xtclLoadAout.o"; then
#	MAKE_LIB="ar cr \${TCL_LIB_FILE} \${OBJS}"
#    else
#	MAKE_LIB="\${SHLIB_LD} -o \${TCL_LIB_FILE} \${OBJS} ${SHLIB_LD_LIBS}"
#	RANLIB=":"
#    fi
#else
    TCL_SHARED_BUILD=0
    case $system in
        BSD/OS*)
	    ;;

	AIX-*)
            ;;

        *)
	    SHLIB_LD_LIBS=""
	    ;;
    esac
    TCL_SHLIB_CFLAGS=""
    TCL_LD_SEARCH_FLAGS=""
    eval "TCL_LIB_FILE=libtcl${TCL_UNSHARED_LIB_SUFFIX}"
    MAKE_LIB="ar cr \${TCL_LIB_FILE} \${OBJS}"
#fi

# 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 "${TCL_LIB_VERSIONS_OK}" = "ok"; then
    TCL_LIB_FLAG="-ltcl${TCL_VERSION}\${TCL_DBGX}"
else
    TCL_LIB_FLAG="-ltcl`echo ${TCL_VERSION} | tr -d .`\${TCL_DBGX}"
fi
#TCL_BUILD_LIB_SPEC="-L`pwd` ${TCL_LIB_FLAG}"
TCL_BUILD_LIB_SPEC="`pwd`/libtcl8.0.a"
TCL_LIB_SPEC="-L${exec_prefix}/lib ${TCL_LIB_FLAG}"

# tclConfig.sh needs a version of the _LIB_SUFFIX that has been eval'ed
# so that the backslashes quoting the DBX braces are dropped.

# Trick to replace DBGX with TCL_DBGX
DBGX='${TCL_DBGX}'
eval "TCL_LIB_FILE=${TCL_LIB_FILE}"

VERSION='${VERSION}'
eval "CFG_TCL_SHARED_LIB_SUFFIX=${TCL_SHARED_LIB_SUFFIX}"
eval "CFG_TCL_UNSHARED_LIB_SUFFIX=${TCL_UNSHARED_LIB_SUFFIX}"

#--------------------------------------------------------------------
#	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 "$prefix" != "$exec_prefix"; then
    TCL_PACKAGE_PATH="${exec_prefix}/lib ${prefix}/lib"
else
    TCL_PACKAGE_PATH="${prefix}/lib"
fi

AC_SUBST(BUILD_DLTEST)
AC_SUBST(CFLAGS_DEBUG)
AC_SUBST(CFLAGS_DEFAULT)
AC_SUBST(CFLAGS_OPTIMIZE)
AC_SUBST(CFLAGS_WARNING)
AC_SUBST(CFG_TCL_SHARED_LIB_SUFFIX)
AC_SUBST(CFG_TCL_UNSHARED_LIB_SUFFIX)
AC_SUBST(TCL_DBGX)
AC_SUBST(DL_LIBS)
AC_SUBST(DL_OBJS)
AC_SUBST(LD_FLAGS)
AC_SUBST(MAKE_LIB)
AC_SUBST(MATH_LIBS)
AC_SUBST(SHLIB_CFLAGS)
AC_SUBST(SHLIB_LD)
AC_SUBST(SHLIB_LD_LIBS)
AC_SUBST(SHLIB_SUFFIX)
AC_SUBST(TCL_BUILD_LIB_SPEC)
AC_SUBST(TCL_LD_SEARCH_FLAGS)
AC_SUBST(TCL_LIB_FILE)
AC_SUBST(TCL_LIB_FLAG)
AC_SUBST(TCL_LIB_SPEC)
AC_SUBST(TCL_LIB_VERSIONS_OK)
AC_SUBST(TCL_MAJOR_VERSION)
AC_SUBST(TCL_MINOR_VERSION)
AC_SUBST(TCL_PACKAGE_PATH)
AC_SUBST(TCL_PATCH_LEVEL)
AC_SUBST(TCL_SHARED_LIB_SUFFIX)
AC_SUBST(TCL_SHARED_BUILD)
AC_SUBST(TCL_SHLIB_CFLAGS)
AC_SUBST(TCL_SRC_DIR)
AC_SUBST(TCL_UNSHARED_LIB_SUFFIX)
AC_SUBST(TCL_VERSION)

AC_OUTPUT(Makefile tclConfig.sh)