PATCH to represent column numbers using source_location

[Per Bothner]

Eric Botcazou wrote:

> It broke bootstrap on SPARC/Solaris with the vendor compiler:
> 
> cc -xarch=v9 -erroff   -g  -DIN_GCC     -DHAVE_CONFIG_H -DGENERATOR_FILE  -o 
> gengtype \
>  gengtype.o gengtype-lex.o gengtype-yacc.o ../libiberty/libiberty.a
> ild: (undefined symbol) linemap_line_start -- referenced in the text segment 
> of gengtype.o

Well, I tried 'rm gengtype.o' followed by either:
   make gengtype CC='gcc -fno-inline'
or:
   make gengtype CC='gcc -fkeep-inline-functions'
In both cases in linked without problems.

However, I'm assuming problem is that gengtype.h
includes (indirectly) line-map.h without linking
in line-map.o.

The problem is that rtl.h is including input.h.
That seems rather questionable.  Perhaps we should
remove the #inluced "input.h" in rtl.h and see
what breaks.
-- 
	--Per Bothner
per@bothner.com   http://per.bothner.com/