kc3-lang/SDL/acinclude/alsa.m4

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• Hash : 1ad936eb
  Author :
  Date : 2013-08-11T19:56:43
  

  Fixed bug 2027 - Full-screen appears to be broken - hang in SDL_DestroyWindow() Rainer Deyke I'm running Linux Mint 15 with the Cinnamon window manager. SDL_DestroyWindow consistently locks up for me when the window if fullscreen.

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• acinclude/alsa.m4

• ##############################################################################
  dnl Configure Paths for Alsa
  dnl Some modifications by Richard Boulton <richard-alsa@tartarus.org>
  dnl Christopher Lansdown <lansdoct@cs.alfred.edu>
  dnl Jaroslav Kysela <perex@suse.cz>
  dnl Last modification: alsa.m4,v 1.23 2004/01/16 18:14:22 tiwai Exp
  dnl AM_PATH_ALSA([MINIMUM-VERSION [, ACTION-IF-FOUND [, ACTION-IF-NOT-FOUND]]])
  dnl Test for libasound, and define ALSA_CFLAGS and ALSA_LIBS as appropriate.
  dnl enables arguments --with-alsa-prefix=
  dnl                   --with-alsa-enc-prefix=
  dnl                   --disable-alsatest
  dnl
  dnl For backwards compatibility, if ACTION_IF_NOT_FOUND is not specified,
  dnl and the alsa libraries are not found, a fatal AC_MSG_ERROR() will result.
  dnl
  AC_DEFUN([AM_PATH_ALSA],
  [dnl Save the original CFLAGS, LDFLAGS, and LIBS
  alsa_save_CFLAGS="$CFLAGS"
  alsa_save_LDFLAGS="$LDFLAGS"
  alsa_save_LIBS="$LIBS"
  alsa_found=yes
  
  dnl
  dnl Get the cflags and libraries for alsa
  dnl
  AC_ARG_WITH(alsa-prefix,
  [  --with-alsa-prefix=PFX  Prefix where Alsa library is installed(optional)],
  [alsa_prefix="$withval"], [alsa_prefix=""])
  
  AC_ARG_WITH(alsa-inc-prefix,
  [  --with-alsa-inc-prefix=PFX  Prefix where include libraries are (optional)],
  [alsa_inc_prefix="$withval"], [alsa_inc_prefix=""])
  
  dnl FIXME: this is not yet implemented
  AC_ARG_ENABLE(alsatest,
  [  --disable-alsatest      Do not try to compile and run a test Alsa program],
  [enable_alsatest="$enableval"],
  [enable_alsatest=yes])
  
  dnl Add any special include directories
  AC_MSG_CHECKING(for ALSA CFLAGS)
  if test "$alsa_inc_prefix" != "" ; then
  	ALSA_CFLAGS="$ALSA_CFLAGS -I$alsa_inc_prefix"
  	CFLAGS="$CFLAGS -I$alsa_inc_prefix"
  fi
  AC_MSG_RESULT($ALSA_CFLAGS)
  
  dnl add any special lib dirs
  AC_MSG_CHECKING(for ALSA LDFLAGS)
  if test "$alsa_prefix" != "" ; then
  	ALSA_LIBS="$ALSA_LIBS -L$alsa_prefix"
  	LDFLAGS="$LDFLAGS $ALSA_LIBS"
  fi
  
  dnl add the alsa library
  ALSA_LIBS="$ALSA_LIBS -lasound -lm -ldl -lpthread"
  LIBS=`echo $LIBS | sed 's/-lm//'`
  LIBS=`echo $LIBS | sed 's/-ldl//'`
  LIBS=`echo $LIBS | sed 's/-lpthread//'`
  LIBS=`echo $LIBS | sed 's/  //'`
  LIBS="$ALSA_LIBS $LIBS"
  AC_MSG_RESULT($ALSA_LIBS)
  
  dnl Check for a working version of libasound that is of the right version.
  min_alsa_version=ifelse([$1], ,0.1.1,$1)
  AC_MSG_CHECKING(for libasound headers version >= $min_alsa_version)
  no_alsa=""
      alsa_min_major_version=`echo $min_alsa_version | \
             sed 's/\([[0-9]]*\).\([[0-9]]*\).\([[0-9]]*\)/\1/'`
      alsa_min_minor_version=`echo $min_alsa_version | \
             sed 's/\([[0-9]]*\).\([[0-9]]*\).\([[0-9]]*\)/\2/'`
      alsa_min_micro_version=`echo $min_alsa_version | \
             sed 's/\([[0-9]]*\).\([[0-9]]*\).\([[0-9]]*\)/\3/'`
  
  AC_LANG_SAVE
  AC_LANG_C
  AC_TRY_COMPILE([
  #include <alsa/asoundlib.h>
  ], [
  /* ensure backward compatibility */
  #if !defined(SND_LIB_MAJOR) && defined(SOUNDLIB_VERSION_MAJOR)
  #define SND_LIB_MAJOR SOUNDLIB_VERSION_MAJOR
  #endif
  #if !defined(SND_LIB_MINOR) && defined(SOUNDLIB_VERSION_MINOR)
  #define SND_LIB_MINOR SOUNDLIB_VERSION_MINOR
  #endif
  #if !defined(SND_LIB_SUBMINOR) && defined(SOUNDLIB_VERSION_SUBMINOR)
  #define SND_LIB_SUBMINOR SOUNDLIB_VERSION_SUBMINOR
  #endif
  
  #  if(SND_LIB_MAJOR > $alsa_min_major_version)
    exit(0);
  #  else
  #    if(SND_LIB_MAJOR < $alsa_min_major_version)
  #       error not present
  #    endif
  
  #   if(SND_LIB_MINOR > $alsa_min_minor_version)
    exit(0);
  #   else
  #     if(SND_LIB_MINOR < $alsa_min_minor_version)
  #          error not present
  #      endif
  
  #      if(SND_LIB_SUBMINOR < $alsa_min_micro_version)
  #        error not present
  #      endif
  #    endif
  #  endif
  exit(0);
  ],
    [AC_MSG_RESULT(found.)],
    [AC_MSG_RESULT(not present.)
     ifelse([$3], , [AC_MSG_ERROR(Sufficiently new version of libasound not found.)])
     alsa_found=no]
  )
  AC_LANG_RESTORE
  
  dnl Now that we know that we have the right version, let's see if we have the library and not just the headers.
  if test "x$enable_alsatest" = "xyes"; then
  AC_CHECK_LIB([asound], [snd_ctl_open],,
  	[ifelse([$3], , [AC_MSG_ERROR(No linkable libasound was found.)])
  	 alsa_found=no]
  )
  fi
  
  if test "x$alsa_found" = "xyes" ; then
     ifelse([$2], , :, [$2])
     LIBS=`echo $LIBS | sed 's/-lasound//g'`
     LIBS=`echo $LIBS | sed 's/  //'`
     LIBS="-lasound $LIBS"
  fi
  if test "x$alsa_found" = "xno" ; then
     ifelse([$3], , :, [$3])
     CFLAGS="$alsa_save_CFLAGS"
     LDFLAGS="$alsa_save_LDFLAGS"
     LIBS="$alsa_save_LIBS"
     ALSA_CFLAGS=""
     ALSA_LIBS=""
  fi
  
  dnl That should be it.  Now just export out symbols:
  AC_SUBST(ALSA_CFLAGS)
  AC_SUBST(ALSA_LIBS)
  ])
  

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