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Diffstat (limited to 'm4/gst-feature.m4')
| -rw-r--r-- | m4/gst-feature.m4 | 159 |
1 files changed, 159 insertions, 0 deletions
diff --git a/m4/gst-feature.m4 b/m4/gst-feature.m4 new file mode 100644 index 00000000..cc37f018 --- /dev/null +++ b/m4/gst-feature.m4 @@ -0,0 +1,159 @@ +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 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 enable 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 plugins 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 GST_CHECK_FEATURE +dnl GST_PLUGINS_NO will contain those that won't be built + +AC_DEFUN(GST_CHECK_FEATURE, +[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(*** $3 pre-configured not to be built) +fi +NOUSE= + +dnl *** If it's enabled + +if test x$USE_[$1] = xyes; then + gst_check_save_LIBS=$LIBS + gst_check_save_LDFLAGS=$LDFLAGS + gst_check_save_CFLAGS=$CFLAGS + gst_check_save_CPPFLAGS=$CPPFLAGS + gst_check_save_CXXFLAGS=$CXXFLAGS + HAVE_[$1]=no + $4 + LIBS=$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_[$1]=no + fi +fi +dnl *** Warn if it's disabled or not found +if test x$USE_[$1] = xyes; then + ifelse([$6], , :, [$6]) + GST_PLUGINS_YES="$GST_PLUGINS_YES \n\t[$3]" +else + ifelse([$3], , :, [AC_MSG_WARN( +***** NOTE: These plugins won't be built: [$3] +)]) + GST_PLUGINS_NO="$GST_PLUGINS_NO \n\t[$3]" + ifelse([$7], , :, [$7]) +fi +dnl *** Define the conditional as appropriate +AM_CONDITIONAL(USE_[$1], test x$USE_[$1] = xyes) +]) + +dnl Use a -config program which accepts --cflags and --libs parameters +dnl to set *_CFLAGS and *_LIBS and check existence of a feature. +dnl Richard Boulton <richard-alsa@tartarus.org> +dnl Last modification: 26/06/2001 +dnl GST_CHECK_CONFIGPROG(FEATURE-NAME, CONFIG-PROG-FILENAME, MODULES) +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(GST_CHECK_CONFIGPROG, +[ + AC_PATH_PROG([$1]_CONFIG, [$2], no) + if test x$[$1]_CONFIG = xno; then + [$1]_LIBS= + [$1]_CFLAGS= + HAVE_[$1]=no + else + [$1]_LIBS=`[$2] --libs [$3]` + [$1]_CFLAGS=`[$2] --cflags [$3]` + HAVE_[$1]=yes + fi + AC_SUBST([$1]_LIBS) + AC_SUBST([$1]_CFLAGS) +]) + +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 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(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 + AC_MSG_WARN([$1] not found) + fi + AC_SUBST(HAVE_[$1]) +] +) |