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build-sys: Add SPICE_CHECK_GSTREAMER_ELEMENTS()

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This makes it possible to warn the developer that the GStreamer elements
needed at runtime are missing and give him a hint on how to fix the
issue.

Signed-off-by: Francois Gouget <fgouget@codeweavers.com>
This commit is contained in:
Francois Gouget 2015-11-03 13:05:49 +01:00 committed by Christophe Fergeau
parent 437b817f49
commit f471022453
1 changed files with 36 additions and 0 deletions
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36
m4/spice-deps.m4
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@ -1,6 +1,10 @@
# For autoconf < 2.63
m4_ifndef([AS_VAR_APPEND],
AC_DEFUN([AS_VAR_APPEND], $1=$$1$2))
m4_ifndef([AS_VAR_COPY],
[m4_define([AS_VAR_COPY],
[AS_LITERAL_IF([$1[]$2], [$1=$$2], [eval $1=\$$2])])])
# SPICE_WARNING(warning)
# SPICE_PRINT_MESSAGES
@ -216,14 +220,46 @@ AC_DEFUN([SPICE_CHECK_LZ4], [
# ---------------------
AC_DEFUN([SPICE_CHECK_GSTREAMER], [
AS_VAR_PUSHDEF([have_gst],[have_]m4_tolower([$1]))dnl
AS_VAR_PUSHDEF([gst_inspect],[GST_INSPECT_$2])dnl
PKG_CHECK_MODULES([$1], [$3],
[have_gst="yes"
AC_SUBST(AS_TR_SH([[$1]_CFLAGS]))
AC_SUBST(AS_TR_SH([[$1]_LIBS]))
AS_VAR_APPEND([SPICE_REQUIRES], [" $3"])
AC_DEFINE(AS_TR_SH([HAVE_$1]), [1], [Define if supporting GStreamer $2])
AC_PATH_PROG(gst_inspect, gst-inspect-$2)
AS_IF([test "x$gst_inspect" = x],
SPICE_WARNING([Cannot verify that the required runtime GStreamer $2 elements are present because gst-inspect-$2 is missing]))
$4],
[have_gst="no"
$5])
AS_VAR_POPDEF([gst_inspect])dnl
AS_VAR_POPDEF([have_gst])dnl
])
# SPICE_CHECK_GSTREAMER_ELEMENTS(gst-inspect, package, elements-to-check-for)
# ---------------------
# Checks that the specified GStreamer elements are installed. If not it
# issues a warning and sets missing_gstreamer_elements.
# ---------------------
AC_DEFUN([SPICE_CHECK_GSTREAMER_ELEMENTS], [
AS_IF([test "x$1" != x],
[missing=""
for element in $3
do
AS_VAR_PUSHDEF([cache_var],[spice_cv_prog_${1}_${element}])dnl
AC_CACHE_CHECK([for the $element GStreamer element], cache_var,
[found=no
"$1" $element >/dev/null 2>/dev/null && found=yes
eval "cache_var=$found"])
AS_VAR_COPY(res, cache_var)
AS_IF([test "x$res" = "xno"], [missing="$missing $element"])
AS_VAR_POPDEF([cache_var])dnl
done
AS_IF([test "x$missing" != x],
[SPICE_WARNING([The$missing GStreamer element(s) are missing. You should be able to find them in the $2 package.])
missing_gstreamer_elements="yes"],
[test "x$missing_gstreamer_elements" = x],
[missing_gstreamer_elements="no"])
])
])