openmp/cmake/HandleOpenMPOptions.cmake

   1 if (NOT COMMAND append_if)
   2   # From HandleLLVMOptions.cmake
   3   function(append_if condition value)
   4     if (${condition})
   5       foreach(variable ${ARGN})
   6         set(${variable} "${${variable}} ${value}" PARENT_SCOPE)
   7       endforeach(variable)
   8     endif()
   9   endfunction()
  10 endif()
  11
  12 if (NOT COMMAND append)
  13   function(append value)
  14     foreach(variable ${ARGN})
  15       set(${variable} "${${variable}} ${value}" PARENT_SCOPE)
  16     endforeach(variable)
  17   endfunction()
  18 endif()
  19
  20 # MSVC and clang-cl in compatibility mode map -Wall to -Weverything.
  21 # TODO: LLVM adds /W4 instead, check if that works for the OpenMP runtimes.
  22 if (NOT MSVC)
  23   append_if(OPENMP_HAVE_WALL_FLAG "-Wall" CMAKE_C_FLAGS CMAKE_CXX_FLAGS)
  24 endif()
  25 if (OPENMP_ENABLE_WERROR)
  26   append_if(OPENMP_HAVE_WERROR_FLAG "-Werror" CMAKE_C_FLAGS CMAKE_CXX_FLAGS)
  27 endif()
  28
  29 append_if(OPENMP_HAVE_COLOR_DIAGNOSTICS "-fcolor-diagnostics" CMAKE_C_FLAGS CMAKE_CXX_FLAGS)
  30
  31 # Additional warnings that are not enabled by -Wall.
  32 append_if(OPENMP_HAVE_WCAST_QUAL_FLAG "-Wcast-qual" CMAKE_C_FLAGS CMAKE_CXX_FLAGS)
  33 append_if(OPENMP_HAVE_WFORMAT_PEDANTIC_FLAG "-Wformat-pedantic" CMAKE_C_FLAGS CMAKE_CXX_FLAGS)
  34 append_if(OPENMP_HAVE_WIMPLICIT_FALLTHROUGH_FLAG "-Wimplicit-fallthrough" CMAKE_C_FLAGS CMAKE_CXX_FLAGS)
  35 append_if(OPENMP_HAVE_WSIGN_COMPARE_FLAG "-Wsign-compare" CMAKE_C_FLAGS CMAKE_CXX_FLAGS)
  36
  37 # Warnings that we want to disable because they are too verbose or fragile.
  38
  39 # GCC silently accepts any -Wno-<foo> option, but warns about those options
  40 # being unrecognized only if the compilation triggers other warnings to be
  41 # printed. Therefore, check for whether the compiler supports options in the
  42 # form -W<foo>, and if supported, add the corresponding -Wno-<foo> option.
  43
  44 append_if(OPENMP_HAVE_WEXTRA_FLAG "-Wno-extra" CMAKE_C_FLAGS CMAKE_CXX_FLAGS)
  45 append_if(OPENMP_HAVE_WPEDANTIC_FLAG "-Wno-pedantic" CMAKE_C_FLAGS CMAKE_CXX_FLAGS)
  46 append_if(OPENMP_HAVE_WMAYBE_UNINITIALIZED_FLAG "-Wno-maybe-uninitialized" CMAKE_C_FLAGS CMAKE_CXX_FLAGS)
  47
  48 if (NOT (WIN32 OR CYGWIN))
  49   # This flag is not relevant on Windows; the flag is accepted, but produces warnings
  50   # about argument unused during compilation.
  51   append_if(OPENMP_HAVE_NO_SEMANTIC_INTERPOSITION "-fno-semantic-interposition" CMAKE_C_FLAGS CMAKE_CXX_FLAGS)
  52 endif()
  53 append_if(OPENMP_HAVE_FUNCTION_SECTIONS "-ffunction-section" CMAKE_C_FLAGS CMAKE_CXX_FLAGS)
  54 append_if(OPENMP_HAVE_DATA_SECTIONS "-fdata-sections" CMAKE_C_FLAGS CMAKE_CXX_FLAGS)
  55
  56 if (MSVC)
  57   # Disable "warning C4201: nonstandard extension used: nameless struct/union"
  58   append("-wd4201" CMAKE_C_FLAGS CMAKE_CXX_FLAGS)
  59
  60   # Disable "warning C4190: '__kmpc_atomic_cmplx8_rd' has C-linkage specified, but returns
  61   # UDT '__kmp_cmplx64_t' which is incompatible with C"
  62   append("-wd4190" CMAKE_C_FLAGS CMAKE_CXX_FLAGS)
  63 endif()