Accept any filepath in llvm_check_source_file_list

[serge-sans-paille]

Summary

llvm_check_source_file_list currently only accepts paths relative to current CMAKE_SOURCE_DIR. Extend it to any path, including absolute ones.

[smeenai]

Could you upload the patch with context (-U9999) please?

[smeenai]

LGTM with the comments addressed.

cmake/modules/LLVMProcessSources.cmake

84–89

You should be able to delete this entire block now.

99

It's more friendly to display the relative path to the source directory here, rather than the full path.

[serge-sans-paille]

Error message updated.

cmake/modules/LLVMProcessSources.cmake

84–89

${entry} is still used in `list(FIND LLVM_OPTIONAL_SOURCES ${entry} idx)`. I don't quite get where LLVM_OPTIONAL_SOURCES is set though.

[smeenai]

cmake/modules/LLVMProcessSources.cmake

99

I think ${g} is still gonna be the full path, since it's the result of a glob. You'll need to do an explicit relative path calculation.

[serge-sans-paille]

Error message checked on our codebase without issue. Indeed a relative path looks prettier.

[smeenai]

Sweet, thanks for the update.

[serge-sans-paille]

thanks @smeenai for the review o/

cmake/modules/LLVMProcessSources.cmake

function(llvm_process_sources OUT_VAR)
   endif()
 
   set( ${OUT_VAR} ${sources} PARENT_SCOPE )
 endfunction(llvm_process_sources)
 
 
 function(llvm_check_source_file_list)
   cmake_parse_arguments(ARG "" "SOURCE_DIR" "" ${ARGN})
-  set(listed ${ARG_UNPARSED_ARGUMENTS})
+  foreach(l ${ARG_UNPARSED_ARGUMENTS})
+      get_filename_component(fp ${l} REALPATH)
+      list(APPEND listed ${fp})
+  endforeach()
+
   if(ARG_SOURCE_DIR)
     file(GLOB globbed
-         RELATIVE "${CMAKE_CURRENT_LIST_DIR}"
          "${ARG_SOURCE_DIR}/*.c" "${ARG_SOURCE_DIR}/*.cpp")
   else()
     file(GLOB globbed *.c *.cpp)
   endif()
   foreach(g ${globbed})
     get_filename_component(fn ${g} NAME)
     if(ARG_SOURCE_DIR)
       set(entry "${g}")
     else()
       set(entry "${fn}")
     endif()
+    get_filename_component(gp ${g} REALPATH)
 
     # Don't reject hidden files. Some editors create backups in the
     # same directory as the file.
     if (NOT "${fn}" MATCHES "^\\.")
       list(FIND LLVM_OPTIONAL_SOURCES ${entry} idx)
       if( idx LESS 0 )
-        list(FIND listed ${entry} idx)
+        list(FIND listed ${gp} idx)
         if( idx LESS 0 )
-          message(SEND_ERROR "Found unknown source file ${g}
+          message(SEND_ERROR "Found unknown source file ${gp}
 Please update ${CMAKE_CURRENT_LIST_FILE}\n")
         endif()
       endif()
     endif()
   endforeach()
 endfunction(llvm_check_source_file_list)