Disable libctf?

[Sebastian Huber]

Hello,

a recent change broke the GDB build on my FreeBSD test machine:

gmake[2]: Leaving directory 
'/usr/home/user/rtems-source-builder/rtems/build/aarch64-rtems6-gdb-119e99b-x86_64-freebsd12.1-1/build/libctf'
configure: WARNING: libdebuginfod is missing or unusable; some features 
may be unavailable.
checking libunwind-ia64.h usability... no
[...]
checking for library containing dlopen... none required
checking whether to use expat... yes
checking for libexpat... yes
checking how to link with libexpat... 
/usr/home/user/rtems-source-builder/rtems/build/tmp/sb-1001/6/rtems-aarch64/usr/local/rtems/6/lib/libexpat.a
checking for XML_StopParser... yes
checking for libgmp... no
configure: error: GMP is missing or unusable

I guess I don't need libctf to debug non-Linux embedded systems? I tried 
to use --disable-libctf, but this didn't work.

-- 
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Sebastian HUBER
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