1.1 --- /dev/null Thu Jan 01 00:00:00 1970 +0000
1.2 +++ b/gst-gmyth/m4/gst-feature.m4 Wed May 02 18:26:41 2007 +0100
1.3 @@ -0,0 +1,211 @@
1.4 +dnl Perform a check for a feature for GStreamer
1.5 +dnl Richard Boulton <richard-alsa@tartarus.org>
1.6 +dnl Thomas Vander Stichele <thomas@apestaart.org> added useful stuff
1.7 +dnl Last modification: 25/06/2001
1.8 +dnl GST_CHECK_FEATURE(FEATURE-NAME, FEATURE-DESCRIPTION,
1.9 +dnl DEPENDENT-PLUGINS, TEST-FOR-FEATURE,
1.10 +dnl DISABLE-BY-DEFAULT, ACTION-IF-USE, ACTION-IF-NOTUSE)
1.11 +dnl
1.12 +dnl This macro adds a command line argument to enable the user to enable
1.13 +dnl or disable a feature, and if the feature is enabled, performs a supplied
1.14 +dnl test to check if the feature is available.
1.15 +dnl
1.16 +dnl The test should define HAVE_<FEATURE-NAME> to "yes" or "no" depending
1.17 +dnl on whether the feature is available.
1.18 +dnl
1.19 +dnl The macro will set USE_<FEATURE-NAME> to "yes" or "no" depending on
1.20 +dnl whether the feature is to be used.
1.21 +dnl Thomas changed this, so that when USE_<FEATURE-NAME> was already set
1.22 +dnl to no, then it stays that way.
1.23 +dnl
1.24 +dnl The macro will call AM_CONDITIONAL(USE_<<FEATURE-NAME>, ...) to allow
1.25 +dnl the feature to control what is built in Makefile.ams. If you want
1.26 +dnl additional actions resulting from the test, you can add them with the
1.27 +dnl ACTION-IF-USE and ACTION-IF-NOTUSE parameters.
1.28 +dnl
1.29 +dnl FEATURE-NAME is the name of the feature, and should be in
1.30 +dnl purely upper case characters.
1.31 +dnl FEATURE-DESCRIPTION is used to describe the feature in help text for
1.32 +dnl the command line argument.
1.33 +dnl DEPENDENT-PLUGINS lists any plugins which depend on this feature.
1.34 +dnl TEST-FOR-FEATURE is a test which sets HAVE_<FEATURE-NAME> to "yes"
1.35 +dnl or "no" depending on whether the feature is
1.36 +dnl available.
1.37 +dnl DISABLE-BY-DEFAULT if "disabled", the feature is disabled by default,
1.38 +dnl if any other value, the feature is enabled by default.
1.39 +dnl ACTION-IF-USE any extra actions to perform if the feature is to be
1.40 +dnl used.
1.41 +dnl ACTION-IF-NOTUSE any extra actions to perform if the feature is not to
1.42 +dnl be used.
1.43 +dnl
1.44 +dnl
1.45 +dnl thomas :
1.46 +dnl we also added a history.
1.47 +dnl GST_PLUGINS_YES will contain all plugins to be built
1.48 +dnl that were checked through GST_CHECK_FEATURE
1.49 +dnl GST_PLUGINS_NO will contain those that won't be built
1.50 +
1.51 +AC_DEFUN([GST_CHECK_FEATURE],
1.52 +AC_MSG_NOTICE(***)
1.53 +AC_MSG_NOTICE(*** checking plugin: [$3] ***)
1.54 +AC_MSG_NOTICE(***)
1.55 +[dnl
1.56 +builtin(define, [gst_endisable], ifelse($5, [disabled], [enable], [disable]))dnl
1.57 +dnl if it is set to NO, then don't even consider it for building
1.58 +NOUSE=
1.59 +if test "x$USE_[$1]" = "xno"; then
1.60 + NOUSE="yes"
1.61 +fi
1.62 +AC_ARG_ENABLE(translit([$1], A-Z, a-z),
1.63 + [ ]builtin(format, --%-26s gst_endisable %s, gst_endisable-translit([$1], A-Z, a-z), [$2]ifelse([$3],,,: [$3])),
1.64 + [ case "${enableval}" in
1.65 + yes) USE_[$1]=yes;;
1.66 + no) USE_[$1]=no;;
1.67 + *) AC_MSG_ERROR(bad value ${enableval} for --enable-translit([$1], A-Z, a-z)) ;;
1.68 + esac],
1.69 + [ USE_$1=]ifelse($5, [disabled], [no], [yes])) dnl DEFAULT
1.70 +
1.71 +dnl *** set it back to no if it was preset to no
1.72 +if test "x$NOUSE" = "xyes"; then
1.73 + USE_[$1]="no"
1.74 + AC_MSG_WARN(*** $3 pre-configured not to be built)
1.75 +fi
1.76 +NOUSE=
1.77 +
1.78 +dnl *** If it's enabled
1.79 +
1.80 +if test x$USE_[$1] = xyes; then
1.81 + dnl save compile variables before the test
1.82 +
1.83 + gst_check_save_LIBS=$LIBS
1.84 + gst_check_save_LDFLAGS=$LDFLAGS
1.85 + gst_check_save_CFLAGS=$CFLAGS
1.86 + gst_check_save_CPPFLAGS=$CPPFLAGS
1.87 + gst_check_save_CXXFLAGS=$CXXFLAGS
1.88 +
1.89 + HAVE_[$1]=no
1.90 + dnl TEST_FOR_FEATURE
1.91 + $4
1.92 +
1.93 + LIBS=$gst_check_save_LIBS
1.94 + LDFLAGS=$gst_check_save_LDFLAGS
1.95 + CFLAGS=$gst_check_save_CFLAGS
1.96 + CPPFLAGS=$gst_check_save_CPPFLAGS
1.97 + CXXFLAGS=$gst_check_save_CXXFLAGS
1.98 +
1.99 + dnl If it isn't found, unset USE_[$1]
1.100 + if test x$HAVE_[$1] = xno; then
1.101 + USE_[$1]=no
1.102 + fi
1.103 +fi
1.104 +dnl *** Warn if it's disabled or not found
1.105 +if test x$USE_[$1] = xyes; then
1.106 + ifelse([$6], , :, [$6])
1.107 + if test "x$3" != "x"; then
1.108 + GST_PLUGINS_YES="\t[$3]\n$GST_PLUGINS_YES"
1.109 + fi
1.110 + AC_DEFINE(HAVE_[$1], , [support for features: $3])
1.111 +else
1.112 + ifelse([$3], , :, [AC_MSG_NOTICE(*** These plugins will not be built: [$3])])
1.113 + if test "x$3" != "x"; then
1.114 + GST_PLUGINS_NO="\t[$3]\n$GST_PLUGINS_NO"
1.115 + fi
1.116 + ifelse([$7], , :, [$7])
1.117 +fi
1.118 +dnl *** Define the conditional as appropriate
1.119 +AM_CONDITIONAL(USE_[$1], test x$USE_[$1] = xyes)
1.120 +])
1.121 +
1.122 +dnl Use a -config program which accepts --cflags and --libs parameters
1.123 +dnl to set *_CFLAGS and *_LIBS and check existence of a feature.
1.124 +dnl Richard Boulton <richard-alsa@tartarus.org>
1.125 +dnl Last modification: 26/06/2001
1.126 +dnl GST_CHECK_CONFIGPROG(FEATURE-NAME, CONFIG-PROG-FILENAME, MODULES)
1.127 +dnl
1.128 +dnl This check was written for GStreamer: it should be renamed and checked
1.129 +dnl for portability if you decide to use it elsewhere.
1.130 +dnl
1.131 +AC_DEFUN([GST_CHECK_CONFIGPROG],
1.132 +[
1.133 + AC_PATH_PROG([$1]_CONFIG, [$2], no)
1.134 + if test x$[$1]_CONFIG = xno; then
1.135 + [$1]_LIBS=
1.136 + [$1]_CFLAGS=
1.137 + HAVE_[$1]=no
1.138 + else
1.139 + if [$2] --plugin-libs [$3] &> /dev/null; then
1.140 + [$1]_LIBS=`[$2] --plugin-libs [$3]`
1.141 + else
1.142 + [$1]_LIBS=`[$2] --libs [$3]`
1.143 + fi
1.144 + [$1]_CFLAGS=`[$2] --cflags [$3]`
1.145 + HAVE_[$1]=yes
1.146 + fi
1.147 + AC_SUBST([$1]_LIBS)
1.148 + AC_SUBST([$1]_CFLAGS)
1.149 +])
1.150 +
1.151 +dnl Use AC_CHECK_LIB and AC_CHECK_HEADER to do both tests at once
1.152 +dnl sets HAVE_module if we have it
1.153 +dnl Richard Boulton <richard-alsa@tartarus.org>
1.154 +dnl Last modification: 26/06/2001
1.155 +dnl GST_CHECK_LIBHEADER(FEATURE-NAME, LIB NAME, LIB FUNCTION, EXTRA LD FLAGS,
1.156 +dnl HEADER NAME, ACTION-IF-FOUND, ACTION-IF-NOT-FOUND)
1.157 +dnl
1.158 +dnl This check was written for GStreamer: it should be renamed and checked
1.159 +dnl for portability if you decide to use it elsewhere.
1.160 +dnl
1.161 +AC_DEFUN([GST_CHECK_LIBHEADER],
1.162 +[
1.163 + AC_CHECK_LIB([$2], [$3], HAVE_[$1]=yes, HAVE_[$1]=no,[$4])
1.164 + if test "x$HAVE_[$1]" = "xyes"; then
1.165 + AC_CHECK_HEADER([$5], :, HAVE_[$1]=no)
1.166 + if test "x$HAVE_[$1]" = "xyes"; then
1.167 + dnl execute what needs to be
1.168 + ifelse([$6], , :, [$6])
1.169 + else
1.170 + ifelse([$7], , :, [$7])
1.171 + fi
1.172 + else
1.173 + ifelse([$7], , :, [$7])
1.174 + fi
1.175 + AC_SUBST(HAVE_[$1])
1.176 +]
1.177 +)
1.178 +
1.179 +dnl 2004-02-14 Thomas - changed to get set properly and use proper output
1.180 +dnl 2003-06-27 Benjamin Otte - changed to make this work with gstconfig.h
1.181 +dnl
1.182 +dnl Add a subsystem --disable flag and all the necessary symbols and substitions
1.183 +dnl
1.184 +dnl GST_CHECK_SUBSYSTEM_DISABLE(SYSNAME, [subsystem name])
1.185 +dnl
1.186 +AC_DEFUN([GST_CHECK_SUBSYSTEM_DISABLE],
1.187 +[
1.188 + dnl this define will replace each literal subsys_def occurrence with
1.189 + dnl the lowercase hyphen-separated subsystem
1.190 + dnl e.g. if $1 is GST_DEBUG then subsys_def will be a macro with gst-debug
1.191 + define([subsys_def],translit([$1], _A-Z, -a-z))
1.192 +
1.193 + AC_ARG_ENABLE(subsys_def,
1.194 + AC_HELP_STRING(--disable-subsys_def, [disable $2]),
1.195 + [
1.196 + case "${enableval}" in
1.197 + yes) GST_DISABLE_[$1]=no ;;
1.198 + no) GST_DISABLE_[$1]=yes ;;
1.199 + *) AC_MSG_ERROR([bad value ${enableval} for --enable-subsys_def]) ;;
1.200 + esac
1.201 + ],
1.202 + [GST_DISABLE_[$1]=no]) dnl Default value
1.203 +
1.204 + if test x$GST_DISABLE_[$1] = xyes; then
1.205 + AC_MSG_NOTICE([disabled subsystem [$2]])
1.206 + GST_DISABLE_[$1]_DEFINE="#define GST_DISABLE_$1 1"
1.207 + else
1.208 + GST_DISABLE_[$1]_DEFINE="/* #undef GST_DISABLE_$1 */"
1.209 + fi
1.210 + AC_SUBST(GST_DISABLE_[$1]_DEFINE)
1.211 + undefine([subsys_def])
1.212 +])
1.213 +
1.214 +