[FFmpeg-cvslog] configure: Be more helpful when requiring options set

[Luca Barbato]

ffmpeg | branch: master | Luca Barbato <lu_zero at gentoo.org> | Fri Dec  2 13:11:43 2016 +0100| [518a22471e40604a158180a0660aabeeec65e07f] | committer: Vittorio Giovara

configure: Be more helpful when requiring options set

Be explicit about which options should be set.

> http://git.videolan.org/gitweb.cgi/ffmpeg.git/?a=commit;h=518a22471e40604a158180a0660aabeeec65e07f
---

 configure | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/configure b/configure
index 71141c2..d1fffbc 100755
--- a/configure
+++ b/configure
@@ -2896,7 +2896,7 @@ test -n "$cross_prefix" && enable cross_compile
 
 if enabled cross_compile; then
     test -n "$arch" && test -n "$target_os" ||
-        die "Must specify target arch and OS when cross-compiling"
+        die "Must specify target arch (--arch) and OS (--target-os) when cross-compiling"
 fi
 
 ar_default="${cross_prefix}${ar_default}"