Determining if the C compiler works failed with the following output:
Change Dir: /home/br-user/autobuild/run/instance-0/output-1/build/brotli-1.0.7/CMakeFiles/CMakeTmp

Run Build Command:"/usr/bin/make" "cmTC_5836b/fast"
make[1]: Entering directory '/home/br-user/autobuild/run/instance-0/output-1/build/brotli-1.0.7/CMakeFiles/CMakeTmp'
/usr/bin/make -f CMakeFiles/cmTC_5836b.dir/build.make CMakeFiles/cmTC_5836b.dir/build
make[2]: Entering directory '/home/br-user/autobuild/run/instance-0/output-1/build/brotli-1.0.7/CMakeFiles/CMakeTmp'
Building C object CMakeFiles/cmTC_5836b.dir/testCCompiler.c.o
/home/br-user/autobuild/run/instance-0/output-1/host/bin/arm-linux-gcc --sysroot=/home/br-user/autobuild/run/instance-0/output-1/host/arm-buildroot-uclinux-uclibcgnueabi/sysroot   -D_LARGEFILE_SOURCE -D_LARGEFILE64_SOURCE -D_FILE_OFFSET_BITS=64  -Os    -Wl,-elf2flt -static   -DNDEBUG   -o CMakeFiles/cmTC_5836b.dir/testCCompiler.c.o   -c /home/br-user/autobuild/run/instance-0/output-1/build/brotli-1.0.7/CMakeFiles/CMakeTmp/testCCompiler.c
Linking C executable cmTC_5836b
/usr/bin/cmake -E cmake_link_script CMakeFiles/cmTC_5836b.dir/link.txt --verbose=1
/home/br-user/autobuild/run/instance-0/output-1/host/bin/arm-linux-gcc --sysroot=/home/br-user/autobuild/run/instance-0/output-1/host/arm-buildroot-uclinux-uclibcgnueabi/sysroot -D_LARGEFILE_SOURCE -D_LARGEFILE64_SOURCE -D_FILE_OFFSET_BITS=64  -Os    -Wl,-elf2flt -static   -DNDEBUG  -Wl,-elf2flt -static  -rdynamic CMakeFiles/cmTC_5836b.dir/testCCompiler.c.o  -o cmTC_5836b 
arm-linux-gcc.br_real: error: unrecognized command line option '-rdynamic'
CMakeFiles/cmTC_5836b.dir/build.make:97: recipe for target 'cmTC_5836b' failed
make[2]: *** [cmTC_5836b] Error 1
make[2]: Leaving directory '/home/br-user/autobuild/run/instance-0/output-1/build/brotli-1.0.7/CMakeFiles/CMakeTmp'
Makefile:126: recipe for target 'cmTC_5836b/fast' failed
make[1]: *** [cmTC_5836b/fast] Error 2
make[1]: Leaving directory '/home/br-user/autobuild/run/instance-0/output-1/build/brotli-1.0.7/CMakeFiles/CMakeTmp'