[Kst] [Kst-plot/kst] ced703: Guard against empty cmake generator expressions

[Peter Kümmel]

  Branch: refs/heads/master
  Home:   https://github.com/Kst-plot/kst
  Commit: ced703c13f4e9ffe161e7e3c99931c235a27a6b9
      https://github.com/Kst-plot/kst/commit/ced703c13f4e9ffe161e7e3c99931c235a27a6b9
  Author: Felix Geyer <debfx at fobos.de>
  Date:   2014-08-13 (Wed, 13 Aug 2014)

  Changed paths:
    M cmake/modules/KstPchSupport.cmake

  Log Message:
  -----------
  Guard against empty cmake generator expressions

COMPILER_DEFINITIONS can contain cmake generator expressions that evaluate to an empty string.
gcc fails when you pass -D without an expression as an argument.


  Commit: 0f3bc0f513c50fa8f38c12dd9952c7b66b21bd59
      https://github.com/Kst-plot/kst/commit/0f3bc0f513c50fa8f38c12dd9952c7b66b21bd59
  Author: Peter Kümmel <syntheticpp at gmx.net>
  Date:   2014-08-16 (Sat, 16 Aug 2014)

  Changed paths:
    M cmake/modules/KstPchSupport.cmake

  Log Message:
  -----------
  Merge pull request #2 from debfx/patch-1

Guard against empty cmake generator expressions


Compare: https://github.com/Kst-plot/kst/compare/7841fe3b75d3...0f3bc0f513c5