build: llext_edk: allowing build without LLEXT_EDK

The following changes to the build script allow to build the loader
with CONFIG_LLEXT_EDK=n without the script crashing

Signed-off-by: Andrea Gilardoni <a.gilardoni@arduino.cc>

Author: andreagilardoni

extra/build.sh

@@ -73,20 +73,30 @@ fi
 BUILD_DIR=build/${variant}
 VARIANT_DIR=variants/${variant}
 rm -rf ${BUILD_DIR}
-west build -d ${BUILD_DIR} -b ${target} loader -t llext-edk ${args}
 
-# Extract the generated EDK tarball and copy it to the variant directory
-mkdir -p ${VARIANT_DIR} firmwares
-(set -e ; cd ${BUILD_DIR} && rm -rf llext-edk && tar xf zephyr/llext-edk.tar.Z)
-rsync -a --delete ${BUILD_DIR}/llext-edk ${VARIANT_DIR}/
+LLEXT_EDK_ENABLED=0
+grep "CONFIG_LLEXT_EDK=n" loader/prj.conf || LLEXT_EDK_ENABLED=1
+
+if [ "${LLEXT_EDK_ENABLED}" -eq "1" ]; then
+	args="-t llext-edk ${args}"
+fi
 
-# remove all inline comments in macro definitions
-# (especially from devicetree_generated.h and sys/util_internal.h)
-line_preproc_ok='^\s*#\s*(if|else|elif|endif)' # match conditional preproc lines
-line_comment_only='^\s*\/\*' # match lines starting with comment
-line_continuation='\\$' # match lines ending with '\'
-c_comment='\s*\/\*.*?\*\/' # match C-style comments and any preceding space
-perl -i -pe "s/${c_comment}//gs unless /${line_preproc_ok}/ || (/${line_comment_only}/ && !/${line_continuation}/)" $(find ${VARIANT_DIR}/llext-edk/include/ -type f)
+west build -d ${BUILD_DIR} -b ${target} loader ${args}
+
+mkdir -p ${VARIANT_DIR} firmwares
+if [ "${LLEXT_EDK_ENABLED}" -eq "1" ]; then
+	# Extract the generated EDK tarball and copy it to the variant directory
+	(set -e ; cd ${BUILD_DIR} && rm -rf llext-edk && tar xf zephyr/llext-edk.tar.Z)
+	rsync -a --delete ${BUILD_DIR}/llext-edk ${VARIANT_DIR}/
+
+	# remove all inline comments in macro definitions
+	# (especially from devicetree_generated.h and sys/util_internal.h)
+	line_preproc_ok='^\s*#\s*(if|else|elif|endif)' # match conditional preproc lines
+	line_comment_only='^\s*\/\*' # match lines starting with comment
+	line_continuation='\\$' # match lines ending with '\'
+	c_comment='\s*\/\*.*?\*\/' # match C-style comments and any preceding space
+	perl -i -pe "s/${c_comment}//gs unless /${line_preproc_ok}/ || (/${line_comment_only}/ && !/${line_continuation}/)" $(find ${VARIANT_DIR}/llext-edk/include/ -type f)
+fi
 
 for ext in elf bin hex; do
     rm -f firmwares/zephyr-$variant.$ext
@@ -99,7 +109,11 @@ cp ${BUILD_DIR}/zephyr/.config firmwares/zephyr-$variant.config
 
 # Generate the provides.ld file for linked builds
 echo "Generating exported symbol scripts"
-extra/gen_provides.py "${BUILD_DIR}/zephyr/zephyr.elf" -L > ${VARIANT_DIR}/syms-dynamic.ld
+
+if [ "${LLEXT_EDK_ENABLED}" -eq "1" ]; then
+	extra/gen_provides.py "${BUILD_DIR}/zephyr/zephyr.elf" -L > ${VARIANT_DIR}/syms-dynamic.ld
+fi
+
 extra/gen_provides.py "${BUILD_DIR}/zephyr/zephyr.elf" -LF \
 	"+kheap_llext_heap" \
 	"+kheap__system_heap" \