[ECOS] MPC555 platforms cause gcc segmentation fault

[Steven Clugston]

Hi All

I've been trying to bring a PowerPC MPC555 platform port I've been
working on up-to-date from ecos2.0.

I started by downloading a recent trunk snapshot and building
(unmodified from the cvs snapshot) cme555 and ec555 platforms using the
default package template.

With either platform, part way through the build it fails with a
compiler crash.

It gives the following output:

powerpc-eabi-gcc -c
-I/ecos-d/cygwin/.../ecos/cme555ECOS_install/include
-I/opt/ecos/.../packages/language/c/libc/stdio/current
-I/opt/ecos/.../packages/language/c/libc/stdio/current/src
-I/opt/ecos/.../packages/language/c/libc/stdio/current/tests -I.
-I/opt/ecos/.../packages/language/c/libc/stdio/current/src/input/
-finline-limit=7000 -mcpu=505 -Wall -Wpointer-arith  -Winline -Wundef
-Woverloaded-virtual -g -O2 -ffunction-sections -fdata-sections
-mmultiple -fno-rtti -fno-exceptions  -Wp,-MD,src/input/vfscanf.tmp -o
src/input/language_c_libc_stdio_vfscanf.o
/opt/ecos/.../packages/language/c/libc/stdio/current/src/input/vfscanf.c
xx

make[1]: Leaving directory
`/ecos-d/cygwin/.../ecos/cme555ECOS_build/language/c/libc/stdio/current'

/opt/ecos/ecoscvs/packages/language/c/libc/stdio/current/src/input/vfsca
nf.cxx: In
make: Leaving directory `/ecos-d/cygwin/.../ecos/cme555ECOS_build'
   function `int vfscanf(CYG_ADDRESS (*)[9999], const char*,
__va_list_tag*)':
/opt/ecos/ecoscvs/packages/language/c/libc/stdio/current/src/input/vfsca
nf.cxx:952: internal
   error: Segmentation fault
Please submit a full bug report,
with preprocessed source if appropriate.
See <URL:http://www.gnu.org/software/gcc/bugs.html> for instructions.
make[1]: *** [src/input/vfscanf.o.d] Error 1
make: *** [build] Error 2

I'm using recent cygwin build as a host and the following tool versions:

$ powerpc-eabi-gcc --version
powerpc-eabi-gcc (GCC) 3.2.1 (eCosCentric)

$ make --version
GNU Make 3.80

I've tried substituting 'vfscanf.cxx' with the one from ecos2.0 but it
fails in the same way at the same point in the code:

input_failure:
    return nassigned ? nassigned : -1;
match_failure:
    return nassigned;
} // vfscanf() <---- fails here.

(I was surprised to see 'goto' statements as I thought these were
depeciated/frowned upon in C)

The same code compiles under ecos2.0 alright using the same compiler. I
presume that the complier should not cause a segmentation fault at any
time, but something has changed somewhere in the source which triggers
this.

Should I be using a more recent version of the gnutools?

Thanks for any help.

Steven.






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