include(CheckFunctionExists)
check_function_exists(re_comp HAVE_RE_COMP)
list(APPEND CXXFLAGS -Wno-implicit-function-declaration)
list(APPEND CFLAGS -Wno-implicit-function-declaration)
if(HAVE_RE_COMP)
  list(APPEND LDFLAGS -lm)
  llvm_multisource(plot2fig)
endif()
