Determining if the include file execinfo.h exists failed with the following output:
Change Dir: /mnt/gold/openwrt/openwrt_2203/build_dir/target-arm_arm1176jzf-s+vfp_musl_eabi/bcm27xx-userland-97bc8180ad682b004ea224d1db7b8e108eda4397/CMakeFiles/CMakeTmp

Run Build Command(s):/mnt/gold/openwrt/openwrt_2203/staging_dir/host/bin/ninja cmTC_e75db && [1/2] Building C object CMakeFiles/cmTC_e75db.dir/CheckIncludeFile.c.o
FAILED: CMakeFiles/cmTC_e75db.dir/CheckIncludeFile.c.o 
/mnt/gold/openwrt/openwrt_2203/staging_dir/toolchain-arm_arm1176jzf-s+vfp_gcc-11.2.0_musl_eabi/bin/arm-openwrt-linux-muslgnueabi-gcc   -Os -pipe -fno-caller-saves -fno-plt -fhonour-copts -Wno-error=unused-but-set-variable -Wno-error=unused-result -mfloat-abi=hard -fmacro-prefix-map=/mnt/gold/openwrt/openwrt_2203/build_dir/target-arm_arm1176jzf-s+vfp_musl_eabi/bcm27xx-userland-97bc8180ad682b004ea224d1db7b8e108eda4397=bcm27xx-userland-97bc8180ad682b004ea224d1db7b8e108eda4397 -Wformat -Werror=format-security -fstack-protector -D_FORTIFY_SOURCE=1 -Wl,-z,now -Wl,-z,relro -o CMakeFiles/cmTC_e75db.dir/CheckIncludeFile.c.o -c /mnt/gold/openwrt/openwrt_2203/build_dir/target-arm_arm1176jzf-s+vfp_musl_eabi/bcm27xx-userland-97bc8180ad682b004ea224d1db7b8e108eda4397/CMakeFiles/CMakeTmp/CheckIncludeFile.c
/mnt/gold/openwrt/openwrt_2203/build_dir/target-arm_arm1176jzf-s+vfp_musl_eabi/bcm27xx-userland-97bc8180ad682b004ea224d1db7b8e108eda4397/CMakeFiles/CMakeTmp/CheckIncludeFile.c:1:10: fatal error: execinfo.h: No such file or directory
    1 | #include <execinfo.h>
      |          ^~~~~~~~~~~~
compilation terminated.
ninja: build stopped: subcommand failed.