cmake: compiler: gcc: Explicitly spell out stddef.h and limits.h

Depending on how compiler is built, it prints a different include
directory with `--print-file-name=include`.  What we want, instead, is
directories with `stddef.h` and `include-fixed/limits.h`.

This commit explicitly specify the header files we want to use, then
take the directory from the returned path.

Signed-off-by: Yasushi SHOJI <[email protected]>

Author: yashi

cmake/compiler/clang/target.cmake

@@ -20,11 +20,12 @@ find_program(CMAKE_CXX_COMPILER clang++ ${find_program_clang_args})
 
 if(NOT "${ARCH}" STREQUAL "posix")
 
-  foreach(file_name include include-fixed)
+  foreach(file_name include/stddef.h include-fixed/limits.h)
     execute_process(
       COMMAND ${CMAKE_C_COMPILER} --print-file-name=${file_name}
       OUTPUT_VARIABLE _OUTPUT
       )
+    get_filename_component(_OUTPUT "${_OUTPUT}" DIRECTORY)
     string(REGEX REPLACE "\n" "" _OUTPUT ${_OUTPUT})
 
     list(APPEND NOSTDINC ${_OUTPUT})

cmake/compiler/gcc/target.cmake

@@ -29,11 +29,12 @@ if(NOT DEFINED NOSYSDEF_CFLAG)
   set(NOSYSDEF_CFLAG -undef)
 endif()
 
-foreach(file_name include include-fixed)
+foreach(file_name include/stddef.h include-fixed/limits.h)
   execute_process(
     COMMAND ${CMAKE_C_COMPILER} --print-file-name=${file_name}
     OUTPUT_VARIABLE _OUTPUT
     )
+  get_filename_component(_OUTPUT "${_OUTPUT}" DIRECTORY)
   string(REGEX REPLACE "\n" "" _OUTPUT "${_OUTPUT}")
 
   list(APPEND NOSTDINC ${_OUTPUT})

cmake/compiler/host-gcc/target.cmake

@@ -60,11 +60,12 @@ if(NOT DEFINED NOSYSDEF_CFLAG)
   set(NOSYSDEF_CFLAG -undef)
 endif()
 
-foreach(file_name include)
+foreach(file_name include/stddef.h)
   execute_process(
     COMMAND ${CMAKE_C_COMPILER} --print-file-name=${file_name}
     OUTPUT_VARIABLE _OUTPUT
     )
+  get_filename_component(_OUTPUT "${_OUTPUT}" DIRECTORY)
   string(REGEX REPLACE "\n" "" _OUTPUT "${_OUTPUT}")
 
   list(APPEND NOSTDINC ${_OUTPUT})

cmake/compiler/xcc/target.cmake

@@ -29,11 +29,12 @@ if(NOT DEFINED NOSYSDEF_CFLAG)
   set(NOSYSDEF_CFLAG -undef)
 endif()
 
-foreach(file_name include include-fixed)
+foreach(file_name include/stddef.h include-fixed/limits.h)
   execute_process(
     COMMAND ${CMAKE_C_COMPILER} --print-file-name=${file_name}
     OUTPUT_VARIABLE _OUTPUT
     )
+  get_filename_component(_OUTPUT "${_OUTPUT}" DIRECTORY)
   string(REGEX REPLACE "\n" "" _OUTPUT "${_OUTPUT}")
 
   list(APPEND NOSTDINC ${_OUTPUT})