cmake HAS_LIBM examples

Lewuathe/mlir-hello thirdparty/llvm-project/flang/runtime/Float128Math/CMakeLists.txt :116 

target_compile_definitions(FortranFloat128MathILib INTERFACE
      HAS_LIBM
      )

glKarin/com.n0n3m4.diii4a Q3E/src/main/jni/deplibs/fluidsynth/CMakeLists.txt :582 

find_library ( HAS_LIBM NAMES "m" )

glKarin/com.n0n3m4.diii4a Q3E/src/main/jni/deplibs/fluidsynth/CMakeLists.txt :585 

endif ( HAS_LIBM )

FluidSynth/fluidsynth CMakeLists.txt :371 

find_library ( HAS_LIBM NAMES "m" )

FluidSynth/fluidsynth CMakeLists.txt :374 

endif ( HAS_LIBM )