Porting GCC

[Andrew C Aitchison]

On Mon, 8 Sep 2025, Shiva Subramanian via Gcc-help wrote:

> Hi team,
>
> I'm looking for some help - as suggested I successfully built GCC on Debian and gave it a shot on HPE Nonstop OSS. According to ./config.guess, my system was nsv-tandem-nskL25 so I had to run configure like below -
>
> ../configure \
>  --build=nsv-tandem-nskL25 \
>  --host=nsv-tandem-nskL25 \
>  --target=nsv-tandem-nskL25 \
>  --enable-languages=c,c++ \
>  --disable-multilib \
>  --disable-shared \
>  --prefix=$HOME/gcc-install \
>  CC="nscc -Wstd=c17" \
>  CXX="nscc -Wstd=c++17" \
>  LD=xld
>
> The CC, CXX & LD flags are my system specific - I also wanted to build GCC for C & C++ first before considering other languages. But it seems to fail at the below make step irrespective of what I do.
>
> make[3]: Entering directory '/home/shiva/gcc/build/libiberty'
> if [ x"-fPIC" != x ] && [ ! -d pic ]; then \
>  mkdir pic; \
> else true; fi
> touch stamp-picdir
> if [ x"" != x ] && [ ! -d noasan ]; then \
>  mkdir noasan; \
> else true; fi
> touch stamp-noasandir
> if [ x"-fPIC" != x ]; then \
>  nscc -Wstd=c17 -c -DHAVE_CONFIG_H -g  -I. -I../../libiberty/../include   -D_GNU_SOURCE  -fPIC ../../libiberty/regex.c -o pic/regex.o; \
> else true; fi
> nscc: illegal option -- f
> Makefile:1241: recipe for target 'regex.o' failed
> make[3]: *** [regex.o] Error 1
> make[3]: Leaving directory '/home/shiva/gcc/build/libiberty'
> Makefile:14374: recipe for target 'all-stage1-libiberty' failed
> make[2]: *** [all-stage1-libiberty] Error 2
> make[2]: Leaving directory '/home/shiva/gcc/build'
> Makefile:25592: recipe for target 'stage1-bubble' failed
> make[1]: *** [stage1-bubble] Error 2
> make[1]: Leaving directory '/home/shiva/gcc/build'
> Makefile:1105: recipe for target 'all' failed
> make: *** [all] Error 2
> /home/shiva/gcc/build:
>
> Unfortunately, our C compiler doesn't under the -fPIC flag - I've
> tried exporting PICFLAG variable as empty before configure or run it
> as a param to Make but neither worked. I wouldn't want to update the
> libiberty/Makefile manually so would appreciate any ideas.

I would work around that by wrapping your compiler in a script
that ignoes -fPIC (or replaces it with -fpic or an option
which passes it to your assembler ...)

-- 
Andrew C. Aitchison                      Kendal, UK
                    andrew@aitchison.me.uk