CHANGE: move cuda compute checks elsewhere

This was done to avoid superfluous checks for cuda compute capability,
even though they are not needed

Author: Xosrov

README.md

@@ -340,7 +340,6 @@ ffmpeg-build-script v1.xx
 
 Using 12 make jobs simultaneously.
 With GPL and non-free codecs
-CUDA env variable provided, building with compute capability 75
 cargo not installed. rav1e encoder will not be available.
 
 building giflib - version 5.2.1

build-ffmpeg

@@ -278,18 +278,6 @@ if $NONFREE_AND_GPL; then
   echo "With GPL and non-free codecs"
 fi
 
-# Check CUDA compute capability
-if [[ "$OSTYPE" == "linux-gnu" ]]; then
-  if [ -n "$CUDA_COMPUTE_CAPABILITY" ]; then
-    echo "CUDA env variable provided, building with compute capability $CUDA_COMPUTE_CAPABILITY"
-  else
-    # Set default value if no compute capability was found
-    # Note that multi-architecture builds are not supported in ffmpeg
-    # see https://patchwork.ffmpeg.org/comment/62905/
-    export CUDA_COMPUTE_CAPABILITY=52
-    echo "CUDA env variable not provided, using default compute capability $CUDA_COMPUTE_CAPABILITY"
-  fi
-fi
 
 if [ -n "$LDEXEFLAGS" ]; then
   echo "Start the build in full static mode."
@@ -929,6 +917,12 @@ if [[ "$OSTYPE" == "linux-gnu" ]]; then
     if [ -z "$LDEXEFLAGS" ]; then
       CONFIGURE_OPTIONS+=("--enable-libnpp") # Only libnpp cannot be statically linked.
     fi
+    if [ -z "$CUDA_COMPUTE_CAPABILITY" ]; then
+      # Set default value if no compute capability was found
+      # Note that multi-architecture builds are not supported in ffmpeg
+      # see https://patchwork.ffmpeg.org/comment/62905/
+      export CUDA_COMPUTE_CAPABILITY=52
+    fi
     CONFIGURE_OPTIONS+=("--nvccflags=-gencode arch=compute_$CUDA_COMPUTE_CAPABILITY,code=sm_$CUDA_COMPUTE_CAPABILITY -O2")
   else
     CONFIGURE_OPTIONS+=("--disable-ffnvcodec")