Bugfix: Store user supplied compiler flags that are given (once) via env variables.
Bugfix: Store user supplied compiler flags that are given (once) via env
variables.

git-svn-id: fbbf69ba8011aca0e74e1c67904b11cccbdbe66b@27148 0785d39b-7218-0410-832d-ea1e28bc413d

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