fix relative paths not being resolved correctly by spc (#2093)

closes #2092
closes #2064

Author: henderkes

build-static.sh

@@ -178,7 +178,11 @@ fi
 
 # Embed PHP app, if any
 if [ -n "${EMBED}" ] && [ -d "${EMBED}" ]; then
-	SPC_OPT_BUILD_ARGS="${SPC_OPT_BUILD_ARGS} --with-frankenphp-app=${EMBED}"
+	if [[ "${EMBED}" != /* ]]; then
+		EMBED="${CURRENT_DIR}/${EMBED}"
+	fi
+	# shellcheck disable=SC2089
+	SPC_OPT_BUILD_ARGS="${SPC_OPT_BUILD_ARGS} --with-frankenphp-app='${EMBED}'"
 fi
 
 SPC_OPT_INSTALL_ARGS="go-xcaddy"
@@ -204,7 +208,7 @@ done
 # shellcheck disable=SC2086
 ${spcCommand} download --with-php="${PHP_VERSION}" --for-extensions="${PHP_EXTENSIONS}" --for-libs="${PHP_EXTENSION_LIBS}" ${SPC_OPT_DOWNLOAD_ARGS}
 export FRANKENPHP_SOURCE_PATH="${CURRENT_DIR}"
-# shellcheck disable=SC2086
+# shellcheck disable=SC2086,SC2090
 ${spcCommand} build --enable-zts --build-embed --build-frankenphp ${SPC_OPT_BUILD_ARGS} "${PHP_EXTENSIONS}" --with-libs="${PHP_EXTENSION_LIBS}"
 
 if [ -n "$CI" ]; then