scripts: gen-doc: move all build output of source directory.

Move the intermediate doxygen build output out of the source directory.

Signed-off-by: Liam Girdwood <liam.r.girdwood@linux.intel.com>

Author: lrgirdwo

scripts/gen-doc.sh

@@ -23,11 +23,11 @@ function print_usage()
 # make it runnable from any location
 # user shouldn't be confused from which dir this script has to be run
 SCRIPT_DIR=$(cd "$(dirname "$0")" && pwd)
-
 # expected paths of repositories needed for documentation process
 SOF_REPO=$(dirname "$SCRIPT_DIR")
 DOCS_REPO="$(dirname "$SOF_REPO")/sof-docs"
 PUBLISH_REPO="$(dirname "$SOF_REPO")/thesofproject.github.io"
+BUILD_DIR="$(dirname "$SOF_REPO")/build-sof-docs"
 
 # parse arguments
 DO_BUILD=false
@@ -75,20 +75,19 @@ then
 	fi
 fi
 
-cd "$SOF_REPO/doc"
-
 if "$DO_CLEAN"
 then
 	echo "Cleaning $SOF_REPO"
-	cmake .
+	cd ${BUILD_DIR}
 	make clean
 	make doc-clean
 fi
 
 if "$DO_BUILD"
 then
 	echo "Building $SOF_REPO"
-	cmake .
+	cd "$SOF_REPO/doc"
+	cmake -S . -B ${BUILD_DIR}
 	make doc
 fi