Re: gcc-4.7.4: libgcc2.h:157: error: unable to emulate 'TF'

[U.Mutlu]

Jan Nieuwenhuizen wrote on 07/09/2018 06:57 PM:
> Hi!
>
> I'm working on a full source bootstrap for a GNU system, GuixSD in
> particular.  With the Mes 0.16 release I thought it was done, but now it
> seems I'm stuck.
>
> Using the MesCC C99 compiler written in Guile Scheme, I compiled tcc-0.9.26
> and a tiny Mes C library, barely enough to build
>
>      binutils-2.20.1, gcc-2.95.3, and glibc-2.2.5
>
> Using those tools, I built
>
>      binutils-2.20.1, gcc-4.1.0, and glibc-2.3.6
>
> My attempts to build gcc-4.7.4 are failing, the most common error that I
> get is
>
>       i386-unknown-linux-gcc 
> --sysroot=/gnu/store/jdjpfzjr2zf3xbf7ssl11ljwpq7spid8-glibc-mesboot-2.3.6/include
>    -g -O2 -O2  -g -O2 -DIN_GCC   -W -Wall -Wwrite-strings -Wcast-qual 
> -Wstrict-prototypes -Wmissing-prototypes -Wold-style-definition  -isystem 
> ./include   -fpic -g -DIN_LIBGCC2 -fno-stack-protector   -fpic -I. -I. 
> -I../../host-i386-unknown-linux/gcc -I../.././libgcc -I../.././libgcc/. 
> -I../.././libgcc/../gcc -I../.././libgcc/../include  -DHAVE_CC_TLS  -DUSE_TLS 
> -o _muldi3.o -MT _muldi3.o -MD -MP -MF _muldi3.dep -DL_muldi3 -c 
> ../.././libgcc/libgcc2.c
>       In file included from ../.././libgcc/libgcc2.c:58:
>       ../.././libgcc/libgcc2.h:157: error: unable to emulate 'TF'
>       ../.././libgcc/libgcc2.h:158: error: unable to emulate 'TC'
>       ../.././libgcc/libgcc2.h:161: error: unknown machine mode 
> 'libgcc_cmp_return'
>       ../.././libgcc/libgcc2.h:162: error: unknown machine mode 
> 'libgcc_shift_count'
>       ../.././libgcc/libgcc2.h:372: error: expected '=', ',', ';', 'asm' or 
> '__attribute__' before '__muldi3'
>       ../.././libgcc/libgcc2.h:373: error: expected '=', ',', ';', 'asm' or 
> '__attribute__' before '__divdi3'
>       ../.././libgcc/libgcc2.h:374: error: expected '=', ',', ';', 'asm' or 
> '__attribute__' before '__udivdi3'
>       ../.././libgcc/libgcc2.h:375: error: expected '=', ',', ';', 'asm' or 
> '__attribute__' before '__umoddi3'
>       ../.././libgcc/libgcc2.h:376: error: expected '=', ',', ';', 'asm' or 
> '__attribute__' before '__moddi3'
>       ...
>
> Gcc-4.7.4 advertises it can be built with gcc-2.95 and binutils-2.13.1
> and glibc-2.2.5.
>
> Since mes 0.16 was released two weeks ago I have tried many things, but
> not knowing where this error comes makes progress difficult, e.g.: I
> didn't manage to compile any glibc > 2.3.6, but that may not be
> necessary?


What do you get if you grep for "error: " in the xxx/libgcc/config.log under 
the builddir?
It would also be helpful if you could post also your libiberty/config.h