[arm-gnu] Can't find some source files under cygwin

[Nadi Findikli]

The same project builds fine under Linux (Ubuntu 12.04) but now I have to
move the whole thing to Windows.  As make traverses the directory, it finds
everything except two files (to clarify, these two are the first files in
their respective directories, so I assume the problem will apply to the
whole directory).

More precisely, e.g.
it finds
/home/Nadi/project/version-2.9/external/freertos/Source/portable/GCC/ARM_CM3_MPU/port.c
but not
/home/Nadi/project/version-2.9/external/lwip/src/api/api_lib.c

Details:
GCC Chain : arm-none-eabi-gcc ; gcc version 4.7.2 (Sourcery CodeBench Lite
2012.09-63)
Cygwin        : CYGWIN_NT-6.1-WOW64

-- 
Nadi Findikli
nfindikli at gmail.com
Building a Spindrift 11s <http://building-spindrift11s.blogspot.com/>
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