Making dependencies with "x-rtems-gcc -MM" fails to find system includes

[Rolf Schroedter]

I don't know whether this is a gcc issue or RTEMS or sparc-only  problem:

Making dependencies with
     sparc-rtems-gcc $(CFLAGS) -MM ...
fails not finding the system include <rtems.h>.

     sparc-rtems-gcc $(CFLAGS) -c ...
compiles successfully.

The workaround is to specify the system include explicitely for
making dependencies:
     sparc-rtems-gcc -isystem /opt/rtems-4.6/.../include $(CFLAGS) -MM ...
(using -I is bad because it includes loads of rtems-headers in the 
dependency file.

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Rolf Schroedter, German Aerospace Center

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