configure: use compliant grep regex checks

The current `grep "foo\|bar"' trips on some grep implementations, like
the FreeBSD one. Instead use `egrep "foo|bar"' as suggested by Stefan.

Cc: Stefan Esser <se@FreeBSD.org>
Reported-by: Stefan Esser <se@FreeBSD.org>
Bugzilla: https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=228673
Fixes: 1914c814a6c ("configure: error out if building OMX w/o supported platform")
Fixes: 63e11ac2b5c ("configure: error out if building VA w/o supported platform")
Signed-off-by: Emil Velikov <emil.l.velikov@gmail.com>
Reviewed-by: Matt Turner <mattst88@gmail.com>

diff --git a/configure.ac b/configure.ac
index a195362007159cf0d9365cd31d27b93920a91fb0..502b1787c626b7b79c433503f8b9128e362ea1d0 100644 (file)
--- a/configure.ac
+++ b/configure.ac
@@ -2248,13 +2248,13 @@ else
     have_vdpau_platform=no
 fi
 
-if echo $platforms | grep -q "x11\|drm"; then
+if echo $platforms | egrep -q "x11|drm"; then
     have_omx_platform=yes
 else
     have_omx_platform=no
 fi
 
-if echo $platforms | grep -q "x11\|drm\|wayland"; then
+if echo $platforms | egrep -q "x11|drm|wayland"; then
     have_va_platform=yes
 else
     have_va_platform=no