Determining if the strtod_l exist failed with the following output: Change Dir: /home/buildroot/autobuild/instance-0/output-1/build/fmt-8.0.1/CMakeFiles/CMakeTmp Run Build Command(s):/usr/bin/make cmTC_8d167/fast && make[1]: Entering directory '/home/buildroot/autobuild/instance-0/output-1/build/fmt-8.0.1/CMakeFiles/CMakeTmp' /usr/bin/make -f CMakeFiles/cmTC_8d167.dir/build.make CMakeFiles/cmTC_8d167.dir/build make[2]: Entering directory '/home/buildroot/autobuild/instance-0/output-1/build/fmt-8.0.1/CMakeFiles/CMakeTmp' Building CXX object CMakeFiles/cmTC_8d167.dir/CheckSymbolExists.cxx.o /home/buildroot/autobuild/instance-0/output-1/host/bin/powerpc-linux-g++ --sysroot=/home/buildroot/autobuild/instance-0/output-1/host/powerpc-buildroot-linux-uclibc/sysroot -D_LARGEFILE_SOURCE -D_LARGEFILE64_SOURCE -D_FILE_OFFSET_BITS=64 -Os -g0 -DNDEBUG -std=gnu++11 -o CMakeFiles/cmTC_8d167.dir/CheckSymbolExists.cxx.o -c /home/buildroot/autobuild/instance-0/output-1/build/fmt-8.0.1/CMakeFiles/CMakeTmp/CheckSymbolExists.cxx /home/buildroot/autobuild/instance-0/output-1/build/fmt-8.0.1/CMakeFiles/CMakeTmp/CheckSymbolExists.cxx: In function 'int main(int, char**)': /home/buildroot/autobuild/instance-0/output-1/build/fmt-8.0.1/CMakeFiles/CMakeTmp/CheckSymbolExists.cxx:8:19: error: 'strtod_l' was not declared in this scope; did you mean 'strtoull'? 8 | return ((int*)(&strtod_l))[argc]; | ^~~~~~~~ | strtoull CMakeFiles/cmTC_8d167.dir/build.make:68: recipe for target 'CMakeFiles/cmTC_8d167.dir/CheckSymbolExists.cxx.o' failed make[2]: *** [CMakeFiles/cmTC_8d167.dir/CheckSymbolExists.cxx.o] Error 1 make[2]: Leaving directory '/home/buildroot/autobuild/instance-0/output-1/build/fmt-8.0.1/CMakeFiles/CMakeTmp' Makefile:124: recipe for target 'cmTC_8d167/fast' failed make[1]: *** [cmTC_8d167/fast] Error 2 make[1]: Leaving directory '/home/buildroot/autobuild/instance-0/output-1/build/fmt-8.0.1/CMakeFiles/CMakeTmp' File /home/buildroot/autobuild/instance-0/output-1/build/fmt-8.0.1/CMakeFiles/CMakeTmp/CheckSymbolExists.cxx: /* */ #include int main(int argc, char** argv) { (void)argv; #ifndef strtod_l return ((int*)(&strtod_l))[argc]; #else (void)argc; return 0; #endif }