cross-compiling and `orc.m4`

[Paul Menzel]

Dear orcc folks,


using OpenEmbedded [1] trying to cross-compile GStreamer plug-ins (or
PulseAudio from git master), which includes `orc.m4`, `Makefile` has to be
adapted as noted in `gst-plugins.inc` [2].

        # orc.m4 calls pkg-config ----variable=orcc orc-0.4 to get the path to orcc,
        # resulting in /usr/bin/orcc. Force it to use the staged orcc.
        do_configure_append() {
        	for i in $(find ${S} -name "Makefile") ; do
        		sed -i -e s:${bindir}/orcc:${STAGING_BINDIR_NATIVE}/orcc:g $i
        	done
        }

To be usable in cross compile environments `orc.m4` should not use
`ORC_CHECK` and

        pkg-config --variable=orcc orc-0.4

but something like `AC_CHECK_TOOL` (?) [3] which other projects seem to
use. I am not very familiar with Autotools but I found some examples on
the Web [4–6].


Thanks,

Paul


[1] http://www.openembedded.org/
[2] http://cgit.openembedded.org/cgit.cgi/openembedded/commit/recipes/gstreamer/gst-plugins.inc?id=3d7f3a9e493b6ac454b89add37108083b5cbfa97
[3] http://www.gnu.org/software/hello/manual/autoconf/Generic-Programs.html
[4] http://www.google.com/codesearch/p?hl=de#xBmykwmrpPk/r2/r2/lib/contrib/discount/configure.inc&q=%22ac_prog_yacc%22&sa=N&cd=4&ct=rc
[5] http://www.ctan.org/tex-archive/support/autoconf/
[6] http://www.freesoftwaremagazine.com/books/agaal/autotools_example (AC_PROG_TRY_DOXYGEN)

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