update README

lib/build.sh

@@ -314,7 +314,7 @@ download_release() {
 	done
 
 	# enabling a clean build
-	if [[ ${CLEAN} == true ]]; then
+	if [[ ${CLEAN} == 'ON' ]]; then
 		DO_CLEAN="rm -rf"
 	else
 		DO_CLEAN='void'
@@ -734,7 +734,7 @@ build_libplacebo() {
 	(
 		installDir="${PWD}/3rdparty/glad"
 		get_build_conf glad
-		CLEAN=false download_release
+		CLEAN=OFF download_release
 		cd "${extractedDir}" || exit 1
 		cp -r ./* "${installDir}"
 	) || return 1

lib/compile_opts.sh

@@ -9,7 +9,7 @@ declare -Ag FB_COMP_OPTS_DESC
 
 # default compile options
 FB_COMP_OPTS_DESC['CLEAN']='clean build directories before building'
-DEFAULT_CLEAN=true
+DEFAULT_CLEAN=ON
 
 FB_COMP_OPTS_DESC['LTO']='enable link time optimization'
 DEFAULT_LTO=ON
@@ -37,7 +37,7 @@ libvmaf \
 libx264 \
 libx265 \
 libwebp \
-libmp3lame \
+libmp3lame\
 "
 
 # user-overridable compile option variable names

lib/readme.sh

@@ -13,7 +13,8 @@ gen_function_info() {
 
 gen_compile_opts_info() {
 	for opt in "${FB_COMP_OPTS[@]}"; do
-		echo "- \`${opt}\`: ${FB_COMP_OPTS_DESC[${opt}]}"
+		declare -n defOptVal="DEFAULT_${opt}"
+		echo "- \`${opt}\`: ${FB_COMP_OPTS_DESC[${opt}]} (default: ${defOptVal})"
 	done
 }