superbuild/modules/SDL2/acinclude/esd.m4

# Configure paths for ESD
# Manish Singh    98-9-30
# stolen back from Frank Belew
# stolen from Manish Singh
# Shamelessly stolen from Owen Taylor

dnl AM_PATH_ESD([MINIMUM-VERSION, [ACTION-IF-FOUND [, ACTION-IF-NOT-FOUND]]])
dnl Test for ESD, and define ESD_CFLAGS and ESD_LIBS
dnl
AC_DEFUN([AM_PATH_ESD],
[dnl
dnl Get the cflags and libraries from the esd-config script
dnl
AC_ARG_WITH(esd-prefix,[  --with-esd-prefix=PFX   Prefix where ESD is installed (optional)],
            esd_prefix="$withval", esd_prefix="")
AC_ARG_WITH(esd-exec-prefix,[  --with-esd-exec-prefix=PFX Exec prefix where ESD is installed (optional)],
            esd_exec_prefix="$withval", esd_exec_prefix="")
AC_ARG_ENABLE(esdtest, [  --disable-esdtest       Do not try to compile and run a test ESD program],
		    , enable_esdtest=yes)

  if test x$esd_exec_prefix != x ; then
     esd_args="$esd_args --exec-prefix=$esd_exec_prefix"
     if test x${ESD_CONFIG+set} != xset ; then
        ESD_CONFIG=$esd_exec_prefix/bin/esd-config
     fi
  fi
  if test x$esd_prefix != x ; then
     esd_args="$esd_args --prefix=$esd_prefix"
     if test x${ESD_CONFIG+set} != xset ; then
        ESD_CONFIG=$esd_prefix/bin/esd-config
     fi
  fi

  AC_PATH_PROG(ESD_CONFIG, esd-config, no)
  min_esd_version=ifelse([$1], ,0.2.7,$1)
  AC_MSG_CHECKING(for ESD - version >= $min_esd_version)
  no_esd=""
  if test "$ESD_CONFIG" = "no" ; then
    no_esd=yes
  else
    ESD_CFLAGS=`$ESD_CONFIG $esdconf_args --cflags`
    ESD_LIBS=`$ESD_CONFIG $esdconf_args --libs`

    esd_major_version=`$ESD_CONFIG $esd_args --version | \
           sed 's/\([[0-9]]*\).\([[0-9]]*\).\([[0-9]]*\)/\1/'`
    esd_minor_version=`$ESD_CONFIG $esd_args --version | \
           sed 's/\([[0-9]]*\).\([[0-9]]*\).\([[0-9]]*\)/\2/'`
    esd_micro_version=`$ESD_CONFIG $esd_config_args --version | \
           sed 's/\([[0-9]]*\).\([[0-9]]*\).\([[0-9]]*\)/\3/'`
    if test "x$enable_esdtest" = "xyes" ; then
      AC_LANG_PUSH([C])
      ac_save_CFLAGS="$CFLAGS"
      ac_save_LIBS="$LIBS"
      CFLAGS="$CFLAGS $ESD_CFLAGS"
      LIBS="$LIBS $ESD_LIBS"
dnl
dnl Now check if the installed ESD is sufficiently new. (Also sanity
dnl checks the results of esd-config to some extent
dnl
      rm -f conf.esdtest
      AC_RUN_IFELSE([AC_LANG_SOURCE([[
#include <stdio.h>
#include <stdlib.h>
#include <esd.h>

int main (void)
{
  int major, minor, micro;
  FILE *fp = fopen("conf.esdtest", "w");

  if (fp) fclose(fp);

  if (sscanf("$min_esd_version", "%d.%d.%d", &major, &minor, &micro) != 3) {
     printf("%s, bad version string\n", "$min_esd_version");
     exit(1);
   }

   if (($esd_major_version > major) ||
      (($esd_major_version == major) && ($esd_minor_version > minor)) ||
      (($esd_major_version == major) && ($esd_minor_version == minor) && ($esd_micro_version >= micro)))
    {
      return 0;
    }
  else
    {
      printf("\n*** 'esd-config --version' returned %d.%d.%d, but the minimum version\n", $esd_major_version, $esd_minor_version, $esd_micro_version);
      printf("*** of ESD required is %d.%d.%d. If esd-config is correct, then it is\n", major, minor, micro);
      printf("*** best to upgrade to the required version.\n");
      printf("*** If esd-config was wrong, set the environment variable ESD_CONFIG\n");
      printf("*** to point to the correct copy of esd-config, and remove the file\n");
      printf("*** config.cache before re-running configure\n");
      return 1;
    }
}
]])], [], [no_esd=yes], [echo $ac_n "cross compiling; assumed OK... $ac_c"])
       CFLAGS="$ac_save_CFLAGS"
       LIBS="$ac_save_LIBS"
       AC_LANG_POP([C])
     fi
  fi
  if test "x$no_esd" = x ; then
     AC_MSG_RESULT(yes)
     ifelse([$2], , :, [$2])
  else
     AC_MSG_RESULT(no)
     if test "$ESD_CONFIG" = "no" ; then
       echo "*** The esd-config script installed by ESD could not be found"
       echo "*** If ESD was installed in PREFIX, make sure PREFIX/bin is in"
       echo "*** your path, or set the ESD_CONFIG environment variable to the"
       echo "*** full path to esd-config."
     else
       if test -f conf.esdtest ; then
        :
       else
          echo "*** Could not run ESD test program, checking why..."
          CFLAGS="$CFLAGS $ESD_CFLAGS"
          LIBS="$LIBS $ESD_LIBS"
          AC_LANG_PUSH([C])
          AC_LINK_IFELSE([AC_LANG_PROGRAM([[
#include <stdio.h>
#include <esd.h>
]], [[ return 0; ]])],
        [ echo "*** The test program compiled, but did not run. This usually means"
          echo "*** that the run-time linker is not finding ESD or finding the wrong"
          echo "*** version of ESD. If it is not finding ESD, 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 ESD was incorrectly installed"
          echo "*** or that you have moved ESD since it was installed. In the latter case, you"
          echo "*** may want to edit the esd-config script: $ESD_CONFIG" ])
          CFLAGS="$ac_save_CFLAGS"
          LIBS="$ac_save_LIBS"
          AC_LANG_POP([C])
       fi
     fi
     ESD_CFLAGS=""
     ESD_LIBS=""
     ifelse([$3], , :, [$3])
  fi
  AC_SUBST(ESD_CFLAGS)
  AC_SUBST(ESD_LIBS)
  rm -f conf.esdtest
])

dnl AM_ESD_SUPPORTS_MULTIPLE_RECORD([ACTION-IF-SUPPORTS [, ACTION-IF-NOT-SUPPORTS]])
dnl Test, whether esd supports multiple recording clients (version >=0.2.21)
dnl
AC_DEFUN([AM_ESD_SUPPORTS_MULTIPLE_RECORD],
[dnl
  AC_MSG_NOTICE([whether installed esd version supports multiple recording clients])
  ac_save_ESD_CFLAGS="$ESD_CFLAGS"
  ac_save_ESD_LIBS="$ESD_LIBS"
  AM_PATH_ESD(0.2.21,
    ifelse([$1], , [
      AM_CONDITIONAL(ESD_SUPPORTS_MULTIPLE_RECORD, true)
      AC_DEFINE(ESD_SUPPORTS_MULTIPLE_RECORD, 1,
	[Define if you have esound with support of multiple recording clients.])],
    [$1]),
    ifelse([$2], , [AM_CONDITIONAL(ESD_SUPPORTS_MULTIPLE_RECORD, false)], [$2])
    if test "x$ac_save_ESD_CFLAGS" != x ; then
       ESD_CFLAGS="$ac_save_ESD_CFLAGS"
    fi
    if test "x$ac_save_ESD_LIBS" != x ; then
       ESD_LIBS="$ac_save_ESD_LIBS"
    fi
  )
])