[RFC] 2.22 release: Compilation failure for mingw32 target with --enable-targets=all

["Pierre Muller" <pierre dot muller at ics-cnrs dot unistra dot fr>]

This problem is still present in binutis-2.22 sources
compilation with --enable-targets=all for mingw32 target fails
due to a warning:
gcc -DHAVE_CONFIG_H -I. -I../../binutils-2.22/ld  -I.
-I../../binutils-2.22/ld -
I../bfd -I../../binutils-2.22/ld/../bfd -I../../binutils-2.22/ld/../include
-g
-O0 -D__USE_MINGW_ACCESS -DENABLE_PLUGINS
-DLOCALEDIR="\"/usr/local/share/locale
\""  -W -Wall -Wstrict-prototypes -Wmissing-prototypes -Wshadow -Wno-format
-Wer
ror -g -O0 -D__USE_MINGW_ACCESS -MT eelf32_spu.o -MD -MP -MF
.deps/eelf32_spu.Tp
o -c -o eelf32_spu.o \
          -DEMBEDSPU="\"`echo embedspu | sed 's/^ld-new$/ld.bfd/;s,y,y,'`\""
eel
f32_spu.c
cc1.exe: warnings being treated as errors
eelf32_spu.c: In function 'spu_elf_relink':
eelf32_spu.c:594:3: error: passing argument 2 of 'execvp' from incompatible
poin
ter type
e:\msys\mingw32\bin\../lib/gcc/mingw32/4.5.2/../../../../include/process.h:1
20:4
2: note: expected 'const char * const*' but argument is of type 'char *
const*'
make[3]: *** [eelf32_spu.o] Error 1


>From http://sourceware.org/ml/binutils/2010-12/msg00337.html
>   I got one second problem for compilation of ld
> for mingw with --enable-targets=all
> also in emultempl/spuelf.em
> about the type of execvp argument #2
> (char *const *)
> type is given line 399, but
> mingw process.h header
> gives
> (const char *const *)
> 
> which results in a warning, turned into an error
> because -Werror is the default.
> 
>   I tried to look up what the correct type should be,
> but didn't find any real unambiguous definition of that
> function.
> 
> Pierre Muller


  I got no comment on that part of the email back then, and I still don't
know if this should be considered as an error in mingw32 declarations
or if it should be fixed in Binutils sources.

 I would like to know if this warning should be corrected or not...

  To be honest, I don't understand the difference between
'const char * const *' and 'char * const *' types anyway...

Pierre Muller
GDB pascal language maintainer