configure: Fail if CUDA enabled but not found

Without this patch, configure still passes and enables CUDA, no matter
if it was actually found, breaking the build in case it was not.

diff --git a/configure b/configure
index 5aa8c1fd8e63db12ce8ecc255d84bc8e111cf218..e550547d6630b78a68cd789a48d7c3d203022b49 100755 (executable)
--- a/configure
+++ b/configure
@@ -5513,7 +5513,8 @@ enabled avfoundation_indev && { check_lib2 CoreGraphics/CoreGraphics.h CGGetActi
 enabled avisynth          && { { check_lib2 "windows.h" LoadLibrary; } ||
                                { check_lib2 "dlfcn.h" dlopen -ldl; } ||
                                die "ERROR: LoadLibrary/dlopen not found for avisynth"; }
-enabled cuda              && check_lib cuda.h cuInit -lcuda
+enabled cuda              && { check_lib cuda.h cuInit -lcuda ||
+                               die "ERROR: CUDA not found"; }
 enabled chromaprint       && require chromaprint chromaprint.h chromaprint_get_version -lchromaprint
 enabled coreimage_filter  && { check_header_objcc QuartzCore/CoreImage.h || disable coreimage_filter; }
 enabled coreimagesrc_filter && { check_header_objcc QuartzCore/CoreImage.h || disable coreimagesrc_filter; }