acinclude.m4

来自「Windows NT声卡驱动VXD」· M4 代码 · 共 709 行 · 第 1/2 页

  ac_sympat='_\([_A-Za-z][_A-Za-z0-9]*\)'
  ac_symxfrm='_\1 \1'
  ;;
irix*)
  # Cannot use undefined symbols on IRIX because inlined functions mess us up.
  ac_symcode='[BCDEGRST]'
  ;;
solaris*)
  ac_symcode='[BDTU]'
  ;;
esac

# If we're using GNU nm, then use its standard symbol codes.
if $NM -V 2>&1 | egrep '(GNU|with BFD)' > /dev/null; then
  ac_symcode='[ABCDGISTUW]'
fi

case "$host_os" in
cygwin32* | mingw32*)
  # We do not want undefined symbols on cygwin32.  The user must
  # arrange to define them via -l arguments.
  ac_symcode='[ABCDGISTW]'
  ;;
esac
changequote([,])dnl

# Write the raw and C identifiers.
ac_cv_sys_global_symbol_pipe="sed -n -e 's/^.* $ac_symcode $ac_sympat$/$ac_symxfrm/p'"

# Check to see that the pipe works correctly.
ac_pipe_works=no
cat > conftest.$ac_ext <<EOF
#ifdef __cplusplus
extern "C" {
#endif
char nm_test_var;
void nm_test_func(){}
#ifdef __cplusplus
}
#endif
int main(){nm_test_var='a';nm_test_func;return 0;}
EOF
if AC_TRY_EVAL(ac_compile); then
  # Now try to grab the symbols.
  ac_nlist=conftest.nm
  if AC_TRY_EVAL(NM conftest.$ac_objext \| $ac_cv_sys_global_symbol_pipe \> $ac_nlist) && test -s "$ac_nlist"; then

    # Try sorting and uniquifying the output.
    if sort "$ac_nlist" | uniq > "$ac_nlist"T; then
      mv -f "$ac_nlist"T "$ac_nlist"
      ac_wcout=`wc "$ac_nlist" 2>/dev/null`
changequote(,)dnl
      ac_count=`echo "X$ac_wcout" | sed -e 's,^X,,' -e 's/^[ 	]*\([0-9][0-9]*\).*$/\1/'`
changequote([,])dnl
      (test "$ac_count" -ge 0) 2>/dev/null || ac_count=-1
    else
      rm -f "$ac_nlist"T
      ac_count=-1
    fi

    # Make sure that we snagged all the symbols we need.
    if egrep ' nm_test_var$' "$ac_nlist" >/dev/null; then
      if egrep ' nm_test_func$' "$ac_nlist" >/dev/null; then
	cat <<EOF > conftest.c
#ifdef __cplusplus
extern "C" {
#endif

EOF
        # Now generate the symbol file.
        sed 's/^.* \(.*\)$/extern char \1;/' < "$ac_nlist" >> conftest.c

	cat <<EOF >> conftest.c
#if defined (__STDC__) && __STDC__
# define __ptr_t void *
#else
# define __ptr_t char *
#endif

/* The number of symbols in dld_preloaded_symbols, -1 if unsorted. */
int dld_preloaded_symbol_count = $ac_count;

/* The mapping between symbol names and symbols. */
struct {
  char *name;
  __ptr_t address;
}
changequote(,)dnl
dld_preloaded_symbols[] =
changequote([,])dnl
{
EOF
        sed 's/^\(.*\) \(.*\)$/  {"\1", (__ptr_t) \&\2},/' < "$ac_nlist" >> conftest.c
        cat <<\EOF >> conftest.c
  {0, (__ptr_t) 0}
};

#ifdef __cplusplus
}
#endif
EOF
        # Now try linking the two files.
        mv conftest.$ac_objext conftestm.$ac_objext
	ac_save_LIBS="$LIBS"
	ac_save_CFLAGS="$CFLAGS"
        LIBS="conftestm.$ac_objext"
	CFLAGS="$CFLAGS$no_builtin_flag"
        if AC_TRY_EVAL(ac_link) && test -s conftest; then
          ac_pipe_works=yes
        else
          echo "configure: failed program was:" >&AC_FD_CC
          cat conftest.c >&AC_FD_CC
        fi
        LIBS="$ac_save_LIBS"
	CFLAGS="$ac_save_CFLAGS"
      else
        echo "cannot find nm_test_func in $ac_nlist" >&AC_FD_CC
      fi
    else
      echo "cannot find nm_test_var in $ac_nlist" >&AC_FD_CC
    fi
  else
    echo "cannot run $ac_cv_sys_global_symbol_pipe" >&AC_FD_CC
  fi
else
  echo "$progname: failed program was:" >&AC_FD_CC
  cat conftest.c >&AC_FD_CC
fi
rm -rf conftest*

# Do not use the global_symbol_pipe unless it works.
test "$ac_pipe_works" = yes || ac_cv_sys_global_symbol_pipe=
])

ac_result=yes
if test -z "$ac_cv_sys_global_symbol_pipe"; then
   ac_result=no
fi
AC_MSG_RESULT($ac_result)
])

# AM_SYS_LIBTOOL_CYGWIN32 - find tools needed on cygwin32
AC_DEFUN(AM_SYS_LIBTOOL_CYGWIN32,
[AC_CHECK_TOOL(DLLTOOL, dlltool, false)
AC_CHECK_TOOL(AS, as, false)
])

# AM_SYS_SYMBOL_UNDERSCORE - does the compiler prefix global symbols
#                            with an underscore?
AC_DEFUN(AM_SYS_SYMBOL_UNDERSCORE,
[AC_REQUIRE([AM_PROG_NM])dnl
AC_REQUIRE([AM_SYS_NM_PARSE])dnl
AC_MSG_CHECKING([for _ prefix in compiled symbols])
AC_CACHE_VAL(ac_cv_sys_symbol_underscore,
[ac_cv_sys_symbol_underscore=no
cat > conftest.$ac_ext <<EOF
void nm_test_func(){}
int main(){nm_test_func;return 0;}
EOF
if AC_TRY_EVAL(ac_compile); then
  # Now try to grab the symbols.
  ac_nlist=conftest.nm
  if AC_TRY_EVAL(NM conftest.$ac_objext \| $ac_cv_sys_global_symbol_pipe \> $ac_nlist) && test -s "$ac_nlist"; then
    # See whether the symbols have a leading underscore.
    if egrep '^_nm_test_func' "$ac_nlist" >/dev/null; then
      ac_cv_sys_symbol_underscore=yes
    else
      if egrep '^nm_test_func ' "$ac_nlist" >/dev/null; then
        :
      else
        echo "configure: cannot find nm_test_func in $ac_nlist" >&AC_FD_CC
      fi
    fi
  else
    echo "configure: cannot run $ac_cv_sys_global_symbol_pipe" >&AC_FD_CC
  fi
else
  echo "configure: failed program was:" >&AC_FD_CC
  cat conftest.c >&AC_FD_CC
fi
rm -rf conftest*
])
AC_MSG_RESULT($ac_cv_sys_symbol_underscore)
if test x$ac_cv_sys_symbol_underscore = xyes; then
  AC_DEFINE(WITH_SYMBOL_UNDERSCORE,1,
  [define if compiled symbols have a leading underscore])
fi
])
# Configure paths for AUDIOFILE
# Bertrand Guiheneuf 98-10-21
# stolen from esd.m4 in esound :
# Manish Singh    98-9-30
# stolen back from Frank Belew
# stolen from Manish Singh
# Shamelessly stolen from Owen Taylor

dnl AM_PATH_AUDIOFILE([MINIMUM-VERSION, [ACTION-IF-FOUND [, ACTION-IF-NOT-FOUND]]])
dnl Test for AUDIOFILE, and define AUDIOFILE_CFLAGS and AUDIOFILE_LIBS
dnl
AC_DEFUN(AM_PATH_AUDIOFILE,
[dnl 
dnl Get the cflags and libraries from the audiofile-config script
dnl
AC_ARG_WITH(audiofile-prefix,[  --with-audiofile-prefix=PFX   Prefix where AUDIOFILE is installed (optional)],
            audiofile_prefix="$withval", audiofile_prefix="")
AC_ARG_WITH(audiofile-exec-prefix,[  --with-audiofile-exec-prefix=PFX Exec prefix where AUDIOFILE is installed (optional)],
            audiofile_exec_prefix="$withval", audiofile_exec_prefix="")
AC_ARG_ENABLE(audiofiletest, [  --disable-audiofiletest       Do not try to compile and run a test AUDIOFILE program],
		    , enable_audiofiletest=yes)

  if test x$audiofile_exec_prefix != x ; then
     audiofile_args="$audiofile_args --exec-prefix=$audiofile_exec_prefix"
     if test x${AUDIOFILE_CONFIG+set} != xset ; then
        AUDIOFILE_CONFIG=$audiofile_exec_prefix/bin/audiofile-config
     fi
  fi
  if test x$audiofile_prefix != x ; then
     audiofile_args="$audiofile_args --prefix=$audiofile_prefix"
     if test x${AUDIOFILE_CONFIG+set} != xset ; then
        AUDIOFILE_CONFIG=$audiofile_prefix/bin/audiofile-config
     fi
  fi

  AC_PATH_PROG(AUDIOFILE_CONFIG, audiofile-config, no)
  min_audiofile_version=ifelse([$1], ,0.2.5,$1)
  AC_MSG_CHECKING(for AUDIOFILE - version >= $min_audiofile_version)
  no_audiofile=""
  if test "$AUDIOFILE_CONFIG" = "no" ; then
    no_audiofile=yes
  else
    AUDIOFILE_LIBS=`$AUDIOFILE_CONFIG $audiofileconf_args --libs`
    AUDIOFILE_CFLAGS=`$AUDIOFILE_CONFIG $audiofileconf_args --cflags`
    audiofile_major_version=`$AUDIOFILE_CONFIG $audiofile_args --version | \
           sed 's/\([[0-9]]*\).\([[0-9]]*\).\([[0-9]]*\)/\1/'`
    audiofile_minor_version=`$AUDIOFILE_CONFIG $audiofile_args --version | \
           sed 's/\([[0-9]]*\).\([[0-9]]*\).\([[0-9]]*\)/\2/'`
    audiofile_micro_version=`$AUDIOFILE_CONFIG $audiofile_config_args --version | \
           sed 's/\([[0-9]]*\).\([[0-9]]*\).\([[0-9]]*\)/\3/'`
    if test "x$enable_audiofiletest" = "xyes" ; then
      ac_save_CFLAGS="$CFLAGS"
      ac_save_LIBS="$LIBS"
      CFLAGS="$CFLAGS $AUDIOFILE_CFLAGS"
      LIBS="$LIBS $AUDIOFILE_LIBS"
dnl
dnl Now check if the installed AUDIOFILE is sufficiently new. (Also sanity
dnl checks the results of audiofile-config to some extent
dnl
      rm -f conf.audiofiletest
      AC_TRY_RUN([
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <audiofile.h>

char*
my_strdup (char *str)
{
  char *new_str;
  
  if (str)
    {
      new_str = malloc ((strlen (str) + 1) * sizeof(char));
      strcpy (new_str, str);
    }
  else
    new_str = NULL;
  
  return new_str;
}

int main ()
{
  int major, minor, micro;
  char *tmp_version;

  system ("touch conf.audiofiletest");

  /* HP/UX 9 (%@#!) writes to sscanf strings */
  tmp_version = my_strdup("$min_audiofile_version");
  if (sscanf(tmp_version, "%d.%d.%d", &major, &minor, &micro) != 3) {
     printf("%s, bad version string\n", "$min_audiofile_version");
     exit(1);
   }

   if (($audiofile_major_version > major) ||
      (($audiofile_major_version == major) && ($audiofile_minor_version > minor)) ||
      (($audiofile_major_version == major) && ($audiofile_minor_version == minor) && ($audiofile_micro_version >= micro)))
    {
      return 0;
    }
  else
    {
      printf("\n*** 'audiofile-config --version' returned %d.%d.%d, but the minimum version\n", $audiofile_major_version, $audiofile_minor_version, $audiofile_micro_version);
      printf("*** of AUDIOFILE required is %d.%d.%d. If audiofile-config is correct, then it is\n", major, minor, micro);
      printf("*** best to upgrade to the required version.\n");
      printf("*** If audiofile-config was wrong, set the environment variable AUDIOFILE_CONFIG\n");
      printf("*** to point to the correct copy of audiofile-config, and remove the file\n");
      printf("*** config.cache before re-running configure\n");
      return 1;
    }
}

],, no_audiofile=yes,[echo $ac_n "cross compiling; assumed OK... $ac_c"])
       CFLAGS="$ac_save_CFLAGS"
       LIBS="$ac_save_LIBS"
     fi
  fi
  if test "x$no_audiofile" = x ; then
     AC_MSG_RESULT(yes)
     ifelse([$2], , :, [$2])     
  else
     AC_MSG_RESULT(no)
     if test "$AUDIOFILE_CONFIG" = "no" ; then
       echo "*** The audiofile-config script installed by AUDIOFILE could not be found"
       echo "*** If AUDIOFILE was installed in PREFIX, make sure PREFIX/bin is in"
       echo "*** your path, or set the AUDIOFILE_CONFIG environment variable to the"
       echo "*** full path to audiofile-config."
     else
       if test -f conf.audiofiletest ; then
        :
       else
          echo "*** Could not run AUDIOFILE test program, checking why..."
          CFLAGS="$CFLAGS $AUDIOFILE_CFLAGS"
          LIBS="$LIBS $AUDIOFILE_LIBS"
          AC_TRY_LINK([
#include <stdio.h>
#include <audiofile.h>
],      [ return 0; ],
        [ echo "*** The test program compiled, but did not run. This usually means"
          echo "*** that the run-time linker is not finding AUDIOFILE or finding the wrong"
          echo "*** version of AUDIOFILE. If it is not finding AUDIOFILE, you'll need to set your"
          echo "*** LD_LIBRARY_PATH environment variable, or edit /etc/ld.so.conf to point"
          echo "*** to the installed location  Also, make sure you have run ldconfig if that"
          echo "*** is required on your system"
	  echo "***"
          echo "*** If you have an old version installed, it is best to remove it, although"
          echo "*** you may also be able to get things to work by modifying LD_LIBRARY_PATH"],
        [ echo "*** The test program failed to compile or link. See the file config.log for the"
          echo "*** exact error that occured. This usually means AUDIOFILE was incorrectly installed"
          echo "*** or that you have moved AUDIOFILE since it was installed. In the latter case, you"
          echo "*** may want to edit the audiofile-config script: $AUDIOFILE_CONFIG" ])
          CFLAGS="$ac_save_CFLAGS"
          LIBS="$ac_save_LIBS"
       fi
     fi
     AUDIOFILE_CFLAGS=""
     AUDIOFILE_LIBS=""
     ifelse([$3], , :, [$3])
  fi
  AC_SUBST(AUDIOFILE_CFLAGS)
  AC_SUBST(AUDIOFILE_LIBS)
  rm -f conf.audiofiletest
])