[cmake-developers] Patch for write_compiler_detection_header

[Kevin Godby]

Hello.

When I tried to use the write_compiler_detection_header() function, I
got the following error:

  write_compiler_detection_header: FILE parameter missing.

Apparently on line 250 of WriteCompilerDetectionHeader.cmake, CMake
was parsing FILE as a variable instead of a string.  Wrapping "FILE"
in quotation marks fixed the problem.

A patched module is available via
<https://github.com/godbyk/CMake/commits/fix-write-compiler-detection-header>.

Please let me know if there's a better solution.

Thanks!

—Kevin Godby