Performing C SOURCE FILE Test HAVE_MATH failed with the following output:
Change Dir: /var/tmp/portage/media-radio/wsjtx-2.3.0/work/wsjtx-2.3.0_build/CMakeFiles/CMakeTmp

Run Build Command(s):/usr/bin/ninja cmTC_ab8e1 && [1/2] Building C object CMakeFiles/cmTC_ab8e1.dir/src.c.o
[2/2] Linking C executable cmTC_ab8e1
FAILED: cmTC_ab8e1 
: && /usr/bin/x86_64-pc-linux-gnu-gcc -O2 -pipe -march=x86-64 -frecord-gcc-switches -Wl,-O1 -Wl,--as-needed -Wl,--defsym=__gentoo_check_ldflags__=0 CMakeFiles/cmTC_ab8e1.dir/src.c.o -o cmTC_ab8e1   && :
/usr/lib/gcc/x86_64-pc-linux-gnu/10.2.0/../../../../x86_64-pc-linux-gnu/bin/ld: CMakeFiles/cmTC_ab8e1.dir/src.c.o: in function `main':
src.c:(.text.startup+0x1b): undefined reference to `sqrt'
collect2: error: ld returned 1 exit status
ninja: build stopped: subcommand failed.


Source file was:
#include<math.h>
float f; int main(){sqrt(f);return 0;}