configure.in

linux系统下的音频通信

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(../generic/tcl.h)
# SCCS: @(#) configure.in 1.18 98/08/12 17:29:39

TCL_VERSION=8.0
TCL_MAJOR_VERSION=8
TCL_MINOR_VERSION=0
TCL_PATCH_LEVEL=".3"
VERSION=${TCL_VERSION}

if test "${prefix}" = "NONE"; then
    prefix=/usr/local
fi
if test "${exec_prefix}" = "NONE"; then
    exec_prefix=$prefix
fi
TCL_SRC_DIR=`cd $srcdir/..; pwd`

AC_PROG_RANLIB
#AC_ARG_ENABLE(gcc, [  --enable-gcc            allow use of gcc if available],
#    [tcl_ok=$enableval], [tcl_ok=no])
#if test "$tcl_ok" = "yes"; then
    AC_PROG_CC
#else
#    CC=${CC-cc}
#AC_SUBST(CC)
#fi

# set the warning flags depending on whether or not we are using gcc
if test "${GCC}" = "yes" ; then
    CFLAGS_WARNING="-Wall -Wconversion"
else
    CFLAGS_WARNING=""
fi

#--------------------------------------------------------------------
#	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))
# 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(opendir strstr)

AC_REPLACE_FUNCS(strtol tmpnam waitpid)
AC_CHECK_FUNC(strerror, , AC_DEFINE(NO_STRERROR))
AC_CHECK_FUNC(getwd, , AC_DEFINE(NO_GETWD))
AC_CHECK_FUNC(wait3, , AC_DEFINE(NO_WAIT3))
AC_CHECK_FUNC(uname, , AC_DEFINE(NO_UNAME))

#--------------------------------------------------------------------
#	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

#--------------------------------------------------------------------
#	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
#--------------------------------------------------------------------

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)
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))
AC_HAVE_HEADERS(unistd.h)

#---------------------------------------------------------------------------
#	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.
#---------------------------------------------------------------------------

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)

#--------------------------------------------------------------------
#	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_MSG_CHECKING([fd_set and sys/select])
AC_TRY_COMPILE([#include <sys/types.h>],
	[fd_set readMask, writeMask;], tk_ok=yes, tk_ok=no)
if test $tk_ok = no; then
    AC_HEADER_EGREP(fd_mask, sys/select.h, tk_ok=yes)
    if test $tk_ok = yes; then
	AC_DEFINE(HAVE_SYS_SELECT_H)
    fi
fi
AC_MSG_RESULT($tk_ok)
if test $tk_ok = no; then
    AC_DEFINE(NO_FD_SET)
fi

#------------------------------------------------------------------------------
#       Find out all about time handling differences.
#------------------------------------------------------------------------------

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 $libbsd = yes; then
    AC_DEFINE(USE_DELTA_FOR_TZ)
fi

#--------------------------------------------------------------------
#	Some systems (e.g., IRIX 4.0.5) lack the st_blksize field
#	in struct stat.
#--------------------------------------------------------------------
AC_STRUCT_ST_BLKSIZE

#--------------------------------------------------------------------
#	On some systems strstr is broken: it returns a pointer even
#	even if the original string is empty.
#--------------------------------------------------------------------

AC_MSG_CHECKING([proper strstr implementation])
AC_TRY_RUN([
extern int strstr();
int main()
{
    exit(strstr("\0test", "test") ? 1 : 0);
}
], tcl_ok=yes, tcl_ok=no, tcl_ok=no)
if test $tcl_ok = yes; then
    AC_MSG_RESULT(yes)
else
    AC_MSG_RESULT([broken, using substitute])
    LIBOBJS="$LIBOBJS strstr.o"
fi

#--------------------------------------------------------------------
#	Check for strtoul function.  This is tricky because under some
#	versions of AIX strtoul returns an incorrect terminator
#	pointer for the string "0".
#--------------------------------------------------------------------

AC_CHECK_FUNC(strtoul, tcl_ok=1, tcl_ok=0)
AC_TRY_RUN([
extern int strtoul();
int main()
{
    char *string = "0";
    char *term;
    int value;
    value = strtoul(string, &term, 0);
    if ((value != 0) || (term != (string+1))) {
        exit(1);
    }
    exit(0);
}], , tcl_ok=0, tcl_ok=0)
if test "$tcl_ok" = 0; then
    test -n "$verbose" && echo "	Adding strtoul.o."
    LIBOBJS="$LIBOBJS strtoul.o"
fi

#--------------------------------------------------------------------
#	Check for the strtod function.  This is tricky because in some
#	versions of Linux strtod mis-parses strings starting with "+".
#--------------------------------------------------------------------

AC_CHECK_FUNC(strtod, tcl_ok=1, tcl_ok=0)
AC_TRY_RUN([
extern double strtod();
int main()
{
    char *string = " +69";
    char *term;
    double value;
    value = strtod(string, &term);
    if ((value != 69) || (term != (string+4))) {
	exit(1);
    }
    exit(0);
}], , tcl_ok=0, tcl_ok=0)
if test "$tcl_ok" = 0; then
    test -n "$verbose" && echo "	Adding strtod.o."
    LIBOBJS="$LIBOBJS strtod.o"
fi

#--------------------------------------------------------------------
#	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.
#--------------------------------------------------------------------

AC_CHECK_FUNC(strtod, tcl_strtod=1, tcl_strtod=0)
if test "$tcl_strtod" = 1; then
    AC_MSG_CHECKING([for Solaris 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);
}], tcl_ok=1, tcl_ok=0, tcl_ok=0)
    if test $tcl_ok = 1; then
	AC_MSG_RESULT(ok)
    else
	AC_MSG_RESULT(buggy)
	LIBOBJS="$LIBOBJS fixstrtod.o"
	AC_DEFINE(strtod, fixstrtod)
    fi
fi

#--------------------------------------------------------------------
#	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

#--------------------------------------------------------------------
#	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))

#--------------------------------------------------------------------
#	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_MSG_CHECKING([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_ok=yes, tcl_ok=no)
AC_MSG_RESULT($tcl_ok)
if test $tcl_ok = no; then
    AC_DEFINE(NO_UNION_WAIT)
fi

#--------------------------------------------------------------------
#	Check to see whether the system supports the matherr function
#	and its associated type "struct exception".
#--------------------------------------------------------------------