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http://www.google-melange.com/gci/task/view/google/gci2012/7992212
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Script does what is expected and tries to do it as
smartly as possible.
+ remove occurrences of two blank comment lines
next to each other after Id string line removed.
+ remove entire comment blocks which only exited to
contain CVS Ids
+ If the processing left a blank line at the top of
a file, it was removed.
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* libcsupport/src/envlock.c: Build conditionally.
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* libcsupport/src/envlock.c: Rename define ENVLOCK_DEDIDCATED_MUTEX
into ENVLOCK_DEDICATED_MUTEX (Typo).
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* libcsupport/include/rtems/libio_.h, libcsupport/src/envlock.c,
libcsupport/src/libio.c: Added and use rtems_libio_lock() and
rtems_libio_unlock(). Cleaned up includes and declarations. Do not
use RTEMS_NO_PRIORITY for unused ceiling priority in
rtems_semaphore_create().
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* libc/envlock.c: Implemented code to let newlib's envlock share
the libio open/close mutex. Since both should be lightly used,
this should not lead to problems and saves resources.
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* Per PR212, added envlock support for newlib. This is used
by at least getenv()/putenv() to avoid race conditions.
* libc/envlock.c: New file.
* libc/Makefile.am: Modified to reflect above.
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