dnl Perform a check for a feature for GStreamer

dnl Richard Boulton <richard-alsa@tartarus.org>

dnl Thomas Vander Stichele <thomas@apestaart.org> added useful stuff

dnl Last modification: 25/06/2001

dnl

dnl AG_GST_CHECK_FEATURE(FEATURE-NAME, FEATURE-DESCRIPTION,

dnl                   DEPENDENT-PLUGINS, TEST-FOR-FEATURE,

dnl                   DISABLE-BY-DEFAULT, ACTION-IF-USE, ACTION-IF-NOTUSE)

dnl

dnl This macro adds a command line argument to allow the user to enable

dnl or disable a feature, and if the feature is enabled, performs a supplied

dnl test to check if the feature is available.

dnl

dnl The test should define HAVE_<FEATURE-NAME> to "yes" or "no" depending

dnl on whether the feature is available.

dnl

dnl The macro will set USE_<FEATURE-NAME> to "yes" or "no" depending on

dnl whether the feature is to be used.

dnl Thomas changed this, so that when USE_<FEATURE-NAME> was already set

dnl to no, then it stays that way.

dnl

dnl The macro will call AM_CONDITIONAL(USE_<FEATURE-NAME>, ...) to allow

dnl the feature to control what is built in Makefile.ams.  If you want

dnl additional actions resulting from the test, you can add them with the

dnl ACTION-IF-USE and ACTION-IF-NOTUSE parameters.

dnl

dnl FEATURE-NAME        is the name of the feature, and should be in

dnl                     purely upper case characters.

dnl FEATURE-DESCRIPTION is used to describe the feature in help text for

dnl                     the command line argument.

dnl DEPENDENT-PLUGINS   lists any plug-ins which depend on this feature.

dnl TEST-FOR-FEATURE    is a test which sets HAVE_<FEATURE-NAME> to "yes"

dnl                     or "no" depending on whether the feature is

dnl                     available.

dnl DISABLE-BY-DEFAULT  if "disabled", the feature is disabled by default,

dnl                     if any other value, the feature is enabled by default.

dnl ACTION-IF-USE       any extra actions to perform if the feature is to be

dnl                     used.

dnl ACTION-IF-NOTUSE    any extra actions to perform if the feature is not to

dnl                     be used.

dnl

dnl

dnl thomas :

dnl we also added a history.

dnl GST_PLUGINS_YES will contain all plugins to be built

dnl                 that were checked through AG_GST_CHECK_FEATURE

dnl GST_PLUGINS_NO will contain those that won't be built

AC_DEFUN([AG_GST_CHECK_FEATURE],

[echo

AC_MSG_NOTICE(*** checking feature: [$2] ***)

if test "x[$3]" != "x"

then

  AC_MSG_NOTICE(*** for plug-ins: [$3] ***)

fi

dnl

builtin(define, [gst_endisable], ifelse($5, [disabled], [enable], [disable]))dnl

dnl if it is set to NO, then don't even consider it for building

NOUSE=

if test "x$USE_[$1]" = "xno"; then

  NOUSE="yes"

fi

AC_ARG_ENABLE(translit([$1], A-Z, a-z),

  [  ]builtin(format, --%-26s gst_endisable %s, gst_endisable-translit([$1], A-Z, a-z), [$2]ifelse([$3],,,: [$3])),

  [ case "${enableval}" in

      yes) USE_[$1]=yes;;

      no) USE_[$1]=no;;

      *) AC_MSG_ERROR(bad value ${enableval} for --enable-translit([$1], A-Z, a-z)) ;;

    esac],

  [ USE_$1=]ifelse($5, [disabled], [no], [yes]))           dnl DEFAULT

dnl *** set it back to no if it was preset to no

if test "x$NOUSE" = "xyes"; then

  USE_[$1]="no"

  AC_MSG_WARN(*** $3 pre-configured not to be built)

fi

NOUSE=

dnl *** Check if it is ported or not

if echo " [$GST_PLUGINS_NONPORTED] " | tr , ' ' | grep -i " [$1] " > /dev/null; then

  USE_[$1]="no"

  AC_MSG_WARN(*** $3 not ported)

fi

dnl *** If it's enabled

if test x$USE_[$1] = xyes; then

  dnl save compile variables before the test

  gst_check_save_LIBS=$LIBS

  gst_check_save_LDFLAGS=$LDFLAGS

  gst_check_save_CFLAGS=$CFLAGS

  gst_check_save_CPPFLAGS=$CPPFLAGS

  gst_check_save_CXXFLAGS=$CXXFLAGS

  HAVE_[$1]=no

  dnl TEST_FOR_FEATURE

  $4

  LIBS=$gst_check_save_LIBS

  LDFLAGS=$gst_check_save_LDFLAGS

  CFLAGS=$gst_check_save_CFLAGS

  CPPFLAGS=$gst_check_save_CPPFLAGS

  CXXFLAGS=$gst_check_save_CXXFLAGS

  dnl If it isn't found, unset USE_[$1]

  if test x$HAVE_[$1] = xno; then

    USE_[$1]=no

  else

    ifelse([$3], , :, [AC_MSG_NOTICE(*** These plugins will be built: [$3])])

  fi

fi

dnl *** Warn if it's disabled or not found

if test x$USE_[$1] = xyes; then

  ifelse([$6], , :, [$6])

  if test "x$3" != "x"; then

    GST_PLUGINS_YES="\t[$3]\n$GST_PLUGINS_YES"

  fi

  AC_DEFINE(HAVE_[$1], , [Define to enable $2]ifelse($3,,, [ (used by $3)]).)

else

  ifelse([$3], , :, [AC_MSG_NOTICE(*** These plugins will not be built: [$3])])

  if test "x$3" != "x"; then

    GST_PLUGINS_NO="\t[$3]\n$GST_PLUGINS_NO"

  fi

  ifelse([$7], , :, [$7])

fi

dnl *** Define the conditional as appropriate

AM_CONDITIONAL(USE_[$1], test x$USE_[$1] = xyes)

])

dnl Use AC_CHECK_LIB and AC_CHECK_HEADER to do both tests at once

dnl sets HAVE_module if we have it

dnl Richard Boulton <richard-alsa@tartarus.org>

dnl Last modification: 26/06/2001

dnl AG_GST_CHECK_LIBHEADER(FEATURE-NAME, LIB NAME, LIB FUNCTION, EXTRA LD FLAGS,

dnl                     HEADER NAME, ACTION-IF-FOUND, ACTION-IF-NOT-FOUND)

dnl

dnl This check was written for GStreamer: it should be renamed and checked

dnl for portability if you decide to use it elsewhere.

dnl

AC_DEFUN([AG_GST_CHECK_LIBHEADER],

[

  AC_CHECK_LIB([$2], [$3], HAVE_[$1]=yes, HAVE_[$1]=no,[$4])

  if test "x$HAVE_[$1]" = "xyes"; then

    AC_CHECK_HEADER([$5], :, HAVE_[$1]=no)

    if test "x$HAVE_[$1]" = "xyes"; then

      dnl execute what needs to be

      ifelse([$6], , :, [$6])

    else

      ifelse([$7], , :, [$7])

    fi

  else

    ifelse([$7], , :, [$7])

  fi

  AC_SUBST(HAVE_[$1])

]

)

dnl 2004-02-14 Thomas - changed to get set properly and use proper output

dnl 2003-06-27 Benjamin Otte - changed to make this work with gstconfig.h

dnl

dnl Add a subsystem --disable flag and all the necessary symbols and substitions

dnl

dnl AG_GST_CHECK_SUBSYSTEM_DISABLE(SYSNAME, [subsystem name])

dnl

AC_DEFUN([AG_GST_CHECK_SUBSYSTEM_DISABLE],

[

  dnl this define will replace each literal subsys_def occurrence with

  dnl the lowercase hyphen-separated subsystem

  dnl e.g. if $1 is GST_DEBUG then subsys_def will be a macro with gst-debug

  define([subsys_def],translit([$1], _A-Z, -a-z))

  AC_ARG_ENABLE(subsys_def,

    AC_HELP_STRING(--disable-subsys_def, [disable $2]),

    [

      case "${enableval}" in

        yes) GST_DISABLE_[$1]=no ;;

        no) GST_DISABLE_[$1]=yes ;;

        *) AC_MSG_ERROR([bad value ${enableval} for --enable-subsys_def]) ;;

       esac

    ],

    [GST_DISABLE_[$1]=no]) dnl Default value

  if test x$GST_DISABLE_[$1] = xyes; then

    AC_MSG_NOTICE([disabled subsystem [$2]])

    GST_DISABLE_[$1]_DEFINE="#define GST_DISABLE_$1 1"

  else

    GST_DISABLE_[$1]_DEFINE="/* #undef GST_DISABLE_$1 */"

  fi

  AC_SUBST(GST_DISABLE_[$1]_DEFINE)

  undefine([subsys_def])

])

dnl Parse gstconfig.h for feature and defines add the symbols and substitions

dnl

dnl AG_GST_PARSE_SUBSYSTEM_DISABLE(GST_CONFIGPATH, FEATURE)

dnl

AC_DEFUN([AG_GST_PARSE_SUBSYSTEM_DISABLE],

[

  grep >/dev/null "#undef GST_DISABLE_$2" $1

  if test $? = 0; then

    GST_DISABLE_[$2]=0

  else

    GST_DISABLE_[$2]=1

  fi

  AC_SUBST(GST_DISABLE_[$2])

])

dnl Parse gstconfig.h and defines add the symbols and substitions

dnl

dnl GST_CONFIGPATH=`$PKG_CONFIG --variable=includedir gstreamer-1.0`"/gst/gstconfig.h"

dnl AG_GST_PARSE_SUBSYSTEM_DISABLES(GST_CONFIGPATH)

dnl

AC_DEFUN([AG_GST_PARSE_SUBSYSTEM_DISABLES],

[

  AG_GST_PARSE_SUBSYSTEM_DISABLE($1,GST_DEBUG)

  AG_GST_PARSE_SUBSYSTEM_DISABLE($1,LOADSAVE)

  AG_GST_PARSE_SUBSYSTEM_DISABLE($1,PARSE)

  AG_GST_PARSE_SUBSYSTEM_DISABLE($1,TRACE)

  AG_GST_PARSE_SUBSYSTEM_DISABLE($1,ALLOC_TRACE)

  AG_GST_PARSE_SUBSYSTEM_DISABLE($1,REGISTRY)

  AG_GST_PARSE_SUBSYSTEM_DISABLE($1,PLUGIN)

  AG_GST_PARSE_SUBSYSTEM_DISABLE($1,XML)

])

dnl AG_GST_CHECK_GST_DEBUG_DISABLED(ACTION-IF-DISABLED, ACTION-IF-NOT-DISABLED)

dnl

dnl Checks if the GStreamer debugging system is disabled in the core version

dnl we are compiling against (by checking gstconfig.h)

dnl

AC_DEFUN([AG_GST_CHECK_GST_DEBUG_DISABLED],

[

  AC_REQUIRE([AG_GST_CHECK_GST])

  AC_MSG_CHECKING([whether the GStreamer debugging system is enabled])

  AC_LANG_PUSH([C])

  save_CFLAGS="$CFLAGS"

  CFLAGS="$GST_CFLAGS $CFLAGS"

  AC_COMPILE_IFELSE([

    AC_LANG_SOURCE([[

      #include <gst/gstconfig.h>

      #ifdef GST_DISABLE_GST_DEBUG

      #error "debugging disabled, make compiler fail"

      #endif]])], [ debug_system_enabled=yes], [debug_system_enabled=no])

  CFLAGS="$save_CFLAGS"

  AC_LANG_POP([C])

  AC_MSG_RESULT([$debug_system_enabled])

  if test "x$debug_system_enabled" = "xyes" ; then

    $2

    true

  else

    $1

    true

  fi

])

dnl relies on GST_PLUGINS_ALL, GST_PLUGINS_SELECTED, GST_PLUGINS_YES,

dnl GST_PLUGINS_NO, and BUILD_EXTERNAL

AC_DEFUN([AG_GST_OUTPUT_PLUGINS], [

printf "configure: *** Plug-ins without external dependencies that will be built:\n"

( for i in $GST_PLUGINS_SELECTED; do printf '\t'$i'\n'; done ) | sort

printf "\n"

printf "configure: *** Plug-ins without external dependencies that will NOT be built:\n"

( for i in $GST_PLUGINS_ALL; do

    case " $GST_PLUGINS_SELECTED " in

      *\ $i\ *)

	;;

      *)

	printf '\t'$i'\n'

	;;

    esac

  done ) | sort

printf "\n"

printf "configure: *** Plug-ins that have NOT been ported:\n"

( for i in $GST_PLUGINS_NONPORTED; do

	printf '\t'$i'\n'

  done ) | sort

printf "\n"

if test "x$BUILD_EXTERNAL" = "xno"; then

  printf "configure: *** No plug-ins with external dependencies will be built\n"

else

  printf "configure: *** Plug-ins with dependencies that will be built:"

  printf "$GST_PLUGINS_YES\n" | sort

  printf "\n"

  printf "configure: *** Plug-ins with dependencies that will NOT be built:"

  printf "$GST_PLUGINS_NO\n" | sort

  printf "\n"

fi

])