melunko@47: dnl Perform a check for a feature for GStreamer
melunko@47: dnl Richard Boulton <richard-alsa@tartarus.org>
melunko@47: dnl Thomas Vander Stichele <thomas@apestaart.org> added useful stuff
melunko@47: dnl Last modification: 25/06/2001
melunko@47: dnl GST_CHECK_FEATURE(FEATURE-NAME, FEATURE-DESCRIPTION,
melunko@47: dnl                   DEPENDENT-PLUGINS, TEST-FOR-FEATURE,
melunko@47: dnl                   DISABLE-BY-DEFAULT, ACTION-IF-USE, ACTION-IF-NOTUSE)
melunko@47: dnl
melunko@47: dnl This macro adds a command line argument to enable the user to enable
melunko@47: dnl or disable a feature, and if the feature is enabled, performs a supplied
melunko@47: dnl test to check if the feature is available.
melunko@47: dnl
melunko@47: dnl The test should define HAVE_<FEATURE-NAME> to "yes" or "no" depending
melunko@47: dnl on whether the feature is available.
melunko@47: dnl
melunko@47: dnl The macro will set USE_<FEATURE-NAME> to "yes" or "no" depending on
melunko@47: dnl whether the feature is to be used.
melunko@47: dnl Thomas changed this, so that when USE_<FEATURE-NAME> was already set
melunko@47: dnl to no, then it stays that way.
melunko@47: dnl
melunko@47: dnl The macro will call AM_CONDITIONAL(USE_<<FEATURE-NAME>, ...) to allow
melunko@47: dnl the feature to control what is built in Makefile.ams.  If you want
melunko@47: dnl additional actions resulting from the test, you can add them with the
melunko@47: dnl ACTION-IF-USE and ACTION-IF-NOTUSE parameters.
melunko@47: dnl 
melunko@47: dnl FEATURE-NAME        is the name of the feature, and should be in
melunko@47: dnl                     purely upper case characters.
melunko@47: dnl FEATURE-DESCRIPTION is used to describe the feature in help text for
melunko@47: dnl                     the command line argument.
melunko@47: dnl DEPENDENT-PLUGINS   lists any plugins which depend on this feature.
melunko@47: dnl TEST-FOR-FEATURE    is a test which sets HAVE_<FEATURE-NAME> to "yes"
melunko@47: dnl                     or "no" depending on whether the feature is
melunko@47: dnl                     available.
melunko@47: dnl DISABLE-BY-DEFAULT  if "disabled", the feature is disabled by default,
melunko@47: dnl                     if any other value, the feature is enabled by default.
melunko@47: dnl ACTION-IF-USE       any extra actions to perform if the feature is to be
melunko@47: dnl                     used.
melunko@47: dnl ACTION-IF-NOTUSE    any extra actions to perform if the feature is not to
melunko@47: dnl                     be used.
melunko@47: dnl
melunko@47: dnl
melunko@47: dnl thomas :
melunko@47: dnl we also added a history.  
melunko@47: dnl GST_PLUGINS_YES will contain all plugins to be built
melunko@47: dnl                 that were checked through GST_CHECK_FEATURE
melunko@47: dnl GST_PLUGINS_NO will contain those that won't be built
melunko@47: 
melunko@47: AC_DEFUN([GST_CHECK_FEATURE],
melunko@47: AC_MSG_NOTICE(***)
melunko@47: AC_MSG_NOTICE(*** checking plugin: [$3] ***)
melunko@47: AC_MSG_NOTICE(***)
melunko@47: [dnl
melunko@47: builtin(define, [gst_endisable], ifelse($5, [disabled], [enable], [disable]))dnl
melunko@47: dnl if it is set to NO, then don't even consider it for building
melunko@47: NOUSE=
melunko@47: if test "x$USE_[$1]" = "xno"; then
melunko@47:   NOUSE="yes"
melunko@47: fi
melunko@47: AC_ARG_ENABLE(translit([$1], A-Z, a-z),
melunko@47:   [  ]builtin(format, --%-26s gst_endisable %s, gst_endisable-translit([$1], A-Z, a-z), [$2]ifelse([$3],,,: [$3])),
melunko@47:   [ case "${enableval}" in
melunko@47:       yes) USE_[$1]=yes;;
melunko@47:       no) USE_[$1]=no;;
melunko@47:       *) AC_MSG_ERROR(bad value ${enableval} for --enable-translit([$1], A-Z, a-z)) ;;
melunko@47:     esac],
melunko@47:   [ USE_$1=]ifelse($5, [disabled], [no], [yes]))           dnl DEFAULT
melunko@47: 
melunko@47: dnl *** set it back to no if it was preset to no
melunko@47: if test "x$NOUSE" = "xyes"; then
melunko@47:   USE_[$1]="no"
melunko@47:   AC_MSG_WARN(*** $3 pre-configured not to be built)
melunko@47: fi
melunko@47: NOUSE=
melunko@47: 
melunko@47: dnl *** If it's enabled
melunko@47: 
melunko@47: if test x$USE_[$1] = xyes; then
melunko@47:   dnl save compile variables before the test
melunko@47: 
melunko@47:   gst_check_save_LIBS=$LIBS
melunko@47:   gst_check_save_LDFLAGS=$LDFLAGS
melunko@47:   gst_check_save_CFLAGS=$CFLAGS
melunko@47:   gst_check_save_CPPFLAGS=$CPPFLAGS
melunko@47:   gst_check_save_CXXFLAGS=$CXXFLAGS
melunko@47: 
melunko@47:   HAVE_[$1]=no
melunko@47:   dnl TEST_FOR_FEATURE
melunko@47:   $4
melunko@47: 
melunko@47:   LIBS=$gst_check_save_LIBS
melunko@47:   LDFLAGS=$gst_check_save_LDFLAGS
melunko@47:   CFLAGS=$gst_check_save_CFLAGS
melunko@47:   CPPFLAGS=$gst_check_save_CPPFLAGS
melunko@47:   CXXFLAGS=$gst_check_save_CXXFLAGS
melunko@47: 
melunko@47:   dnl If it isn't found, unset USE_[$1]
melunko@47:   if test x$HAVE_[$1] = xno; then
melunko@47:     USE_[$1]=no
melunko@47:   fi
melunko@47: fi
melunko@47: dnl *** Warn if it's disabled or not found
melunko@47: if test x$USE_[$1] = xyes; then
melunko@47:   ifelse([$6], , :, [$6])
melunko@47:   if test "x$3" != "x"; then
melunko@47:     GST_PLUGINS_YES="\t[$3]\n$GST_PLUGINS_YES"
melunko@47:   fi
melunko@47:   AC_DEFINE(HAVE_[$1], , [support for features: $3])
melunko@47: else
melunko@47:   ifelse([$3], , :, [AC_MSG_NOTICE(*** These plugins will not be built: [$3])])
melunko@47:   if test "x$3" != "x"; then
melunko@47:     GST_PLUGINS_NO="\t[$3]\n$GST_PLUGINS_NO"
melunko@47:   fi
melunko@47:   ifelse([$7], , :, [$7])
melunko@47: fi
melunko@47: dnl *** Define the conditional as appropriate
melunko@47: AM_CONDITIONAL(USE_[$1], test x$USE_[$1] = xyes)
melunko@47: ])
melunko@47: 
melunko@47: dnl Use a -config program which accepts --cflags and --libs parameters
melunko@47: dnl to set *_CFLAGS and *_LIBS and check existence of a feature.
melunko@47: dnl Richard Boulton <richard-alsa@tartarus.org>
melunko@47: dnl Last modification: 26/06/2001
melunko@47: dnl GST_CHECK_CONFIGPROG(FEATURE-NAME, CONFIG-PROG-FILENAME, MODULES)
melunko@47: dnl
melunko@47: dnl This check was written for GStreamer: it should be renamed and checked
melunko@47: dnl for portability if you decide to use it elsewhere.
melunko@47: dnl
melunko@47: AC_DEFUN([GST_CHECK_CONFIGPROG],
melunko@47: [
melunko@47:   AC_PATH_PROG([$1]_CONFIG, [$2], no)
melunko@47:   if test x$[$1]_CONFIG = xno; then
melunko@47:     [$1]_LIBS=
melunko@47:     [$1]_CFLAGS=
melunko@47:     HAVE_[$1]=no
melunko@47:   else
melunko@47:     if [$2] --plugin-libs [$3] &> /dev/null; then
melunko@47:       [$1]_LIBS=`[$2] --plugin-libs [$3]`
melunko@47:     else
melunko@47:       [$1]_LIBS=`[$2] --libs [$3]`
melunko@47:     fi
melunko@47:     [$1]_CFLAGS=`[$2] --cflags [$3]`
melunko@47:     HAVE_[$1]=yes
melunko@47:   fi
melunko@47:   AC_SUBST([$1]_LIBS)
melunko@47:   AC_SUBST([$1]_CFLAGS)
melunko@47: ])
melunko@47: 
melunko@47: dnl Use AC_CHECK_LIB and AC_CHECK_HEADER to do both tests at once
melunko@47: dnl sets HAVE_module if we have it
melunko@47: dnl Richard Boulton <richard-alsa@tartarus.org>
melunko@47: dnl Last modification: 26/06/2001
melunko@47: dnl GST_CHECK_LIBHEADER(FEATURE-NAME, LIB NAME, LIB FUNCTION, EXTRA LD FLAGS, 
melunko@47: dnl                     HEADER NAME, ACTION-IF-FOUND, ACTION-IF-NOT-FOUND)
melunko@47: dnl
melunko@47: dnl This check was written for GStreamer: it should be renamed and checked
melunko@47: dnl for portability if you decide to use it elsewhere.
melunko@47: dnl
melunko@47: AC_DEFUN([GST_CHECK_LIBHEADER],
melunko@47: [
melunko@47:   AC_CHECK_LIB([$2], [$3], HAVE_[$1]=yes, HAVE_[$1]=no,[$4])
melunko@47:   if test "x$HAVE_[$1]" = "xyes"; then
melunko@47:     AC_CHECK_HEADER([$5], :, HAVE_[$1]=no)
melunko@47:     if test "x$HAVE_[$1]" = "xyes"; then
melunko@47:       dnl execute what needs to be
melunko@47:       ifelse([$6], , :, [$6])
melunko@47:     else
melunko@47:       ifelse([$7], , :, [$7])
melunko@47:     fi
melunko@47:   else
melunko@47:     ifelse([$7], , :, [$7])
melunko@47:   fi
melunko@47:   AC_SUBST(HAVE_[$1])
melunko@47: ]
melunko@47: )
melunko@47: 
melunko@47: dnl 2004-02-14 Thomas - changed to get set properly and use proper output
melunko@47: dnl 2003-06-27 Benjamin Otte - changed to make this work with gstconfig.h
melunko@47: dnl
melunko@47: dnl Add a subsystem --disable flag and all the necessary symbols and substitions
melunko@47: dnl
melunko@47: dnl GST_CHECK_SUBSYSTEM_DISABLE(SYSNAME, [subsystem name])
melunko@47: dnl
melunko@47: AC_DEFUN([GST_CHECK_SUBSYSTEM_DISABLE],
melunko@47: [
melunko@47:   dnl this define will replace each literal subsys_def occurrence with
melunko@47:   dnl the lowercase hyphen-separated subsystem
melunko@47:   dnl e.g. if $1 is GST_DEBUG then subsys_def will be a macro with gst-debug
melunko@47:   define([subsys_def],translit([$1], _A-Z, -a-z))
melunko@47: 
melunko@47:   AC_ARG_ENABLE(subsys_def, 
melunko@47:     AC_HELP_STRING(--disable-subsys_def, [disable $2]),
melunko@47:     [
melunko@47:       case "${enableval}" in
melunko@47:         yes) GST_DISABLE_[$1]=no ;;
melunko@47:         no) GST_DISABLE_[$1]=yes ;;
melunko@47:         *) AC_MSG_ERROR([bad value ${enableval} for --enable-subsys_def]) ;;
melunko@47:        esac
melunko@47:     ],
melunko@47:     [GST_DISABLE_[$1]=no]) dnl Default value
melunko@47: 
melunko@47:   if test x$GST_DISABLE_[$1] = xyes; then
melunko@47:     AC_MSG_NOTICE([disabled subsystem [$2]])
melunko@47:     GST_DISABLE_[$1]_DEFINE="#define GST_DISABLE_$1 1" 
melunko@47:   else
melunko@47:     GST_DISABLE_[$1]_DEFINE="/* #undef GST_DISABLE_$1 */"
melunko@47:   fi
melunko@47:   AC_SUBST(GST_DISABLE_[$1]_DEFINE)
melunko@47:   undefine([subsys_def])
melunko@47: ])
melunko@47: 
melunko@47: