Applying ./patches/010-uClibc-ng.patch using plaintext: 
patching file src/parse_ether.c

Applying ./patches/020-libmicrohttpd.patch using plaintext: 
patching file src/webserver.c
make[4]: Entering directory '/builder/shared-workdir/build/sdk/build_dir/target-arc_archs_glibc/device-observatory-1.2.0'
arc-openwrt-linux-gnu-gcc -Os -pipe -matomic -mcpu=archs -fno-caller-saves -fhonour-copts -ffile-prefix-map=/builder/shared-workdir/build/sdk/build_dir/target-arc_archs_glibc/device-observatory-1.2.0=device-observatory-1.2.0 -Wformat -Werror=format-security -fstack-protector -D_FORTIFY_SOURCE=1 -Wl,-z,now -Wl,-z,relro  -I/builder/shared-workdir/build/sdk/staging_dir/toolchain-arc_archs_gcc-12.2.0_glibc/usr/include -I/builder/shared-workdir/build/sdk/staging_dir/toolchain-arc_archs_gcc-12.2.0_glibc/include  -std=gnu99 -Wall -pedantic -Werror -fno-strict-aliasing -Wwrite-strings -DWEBSERVER -lpcap -lmicrohttpd src/data.c src/main.c src/parse_dns.c src/parse_ether.c src/parse_wifi.c src/resolve.c src/utils.c src/webserver.c src/files.h -o device-observatory
src/webserver.c: In function 'read_file':
src/webserver.c:54:3: error: ignoring return value of 'fread' declared with attribute 'warn_unused_result' [-Werror=unused-result]
   54 |   fread(fdata, fsize, 1, fp);
      |   ^~~~~~~~~~~~~~~~~~~~~~~~~~
cc1: all warnings being treated as errors
make[4]: *** [Makefile:20: all] Error 1
make[4]: Leaving directory '/builder/shared-workdir/build/sdk/build_dir/target-arc_archs_glibc/device-observatory-1.2.0'
make[3]: *** [Makefile:43: /builder/shared-workdir/build/sdk/build_dir/target-arc_archs_glibc/device-observatory-1.2.0/.built] Error 2
time: package/feeds/packages/device-observatory/compile#1.53#0.40#2.23