Re: PATCH to allow use of cpplib without linking it into cc1

[Dave Brolley <brolley at cygnus dot com>]

This patch looks OK to me.

Dave

Zack Weinberg wrote:

> This patch adds a configure option, --enable-cpplib, that turns cpp
> into cpplib+cppmain, but doesn't link cpplib into cc1.  In this mode I
> can find bugs in cpplib without having to worry about whether they're
> actually in the interaction between cpplib and c-lex.c.
>
> --enable-c-cpplib is unchanged.
>
> zw
>
> 1998-09-26 15:01 -0400  Zack Weinberg  <zack@rabi.phys.columbia.edu>
>
>         * configure.in: Add --enable-cpplib option which uses cpplib
>         for cpp, but doesn't link cpplib into cc1.  Make help text
>         capitalization consistent.
>
> Index: gcc/configure.in
> ===================================================================
> RCS file: /egcs/carton/cvsfiles/egcs/gcc/configure.in,v
> retrieving revision 1.162
> diff -u -r1.162 configure.in
> --- configure.in        1998/09/24 02:44:53     1.162
> +++ configure.in        1998/09/26 18:59:10
> @@ -152,10 +152,18 @@
>  *)     AC_MSG_ERROR(bad value ${enableval} given for checking option) ;;
>  esac])
>
> -# Enable use of cpplib for C.
> +# Use cpplib+cppmain for the preprocessor, but don't link it with the compiler.
>  cpp_main=cccp
> +AC_ARG_ENABLE(cpplib,
> +[  --enable-cpplib         use cpplib for the C preprocessor.],
> +if test x$enable_cpplib != xno; then
> +  cpp_main=cppmain
> +fi)
> +
> +# Link cpplib into the compiler proper, for C/C++/ObjC.
>  AC_ARG_ENABLE(c-cpplib,
> -[  --enable-c-cpplib       Use cpplib for C and C++.],
> +[  --enable-c-cpplib       link cpplib directly into C and C++ compilers
> +                          (implies --enable-cpplib).],
>  if test x$enable_c_cpplib != xno; then
>    extra_c_objs="${extra_c_objs} cpplib.o cppexp.o cpphash.o cpperror.o"
>    extra_c_objs="${extra_c_objs} prefix.o"
> @@ -163,32 +171,32 @@
>    extra_c_flags=-DUSE_CPPLIB=1
>    cpp_main=cppmain
>  fi)
> -
> +
>  # Enable Multibyte Characters for C/C++
>  AC_ARG_ENABLE(c-mbchar,
> -[  --enable-c-mbchar       Enable multibyte characters for C and C++.],
> +[  --enable-c-mbchar       enable multibyte characters for C and C++.],
>  if test x$enable_c_mbchar != xno; then
>    extra_c_flags=-DMULTIBYTE_CHARS=1
>  fi)
>
>  # Enable Haifa scheduler.
>  AC_ARG_ENABLE(haifa,
> -[  --enable-haifa          Use the experimental scheduler.
> -  --disable-haifa         Don't use the experimental scheduler for the
> +[  --enable-haifa          use the experimental scheduler.
> +  --disable-haifa         don't use the experimental scheduler for the
>                            targets which normally enable it.])
>  # Fast fixincludes
>  #
>  # This is a work in progress...
>  AC_ARG_WITH(fast-fixincludes,
> -[  --with-fast-fixincludes    Use a faster fixinclude program.  Experimental],
> +[  --with-fast-fixincludes    use a faster fixinclude program (experimental)],
>  fast_fixinc="$with_fast_fixincludes",
>  fast_fixinc=no)
>
>  # Enable init_priority.
>  AC_ARG_ENABLE(init-priority,
> -[  --enable-init-priority  Use attributes to assign initialization order
> +[  --enable-init-priority  use attributes to assign initialization order
>                           for static objects.
> -  --disable-init-priority Conform to ISO C++ rules for ordering static objects
> +  --disable-init-priority conform to ISO C++ rules for ordering static objects
>                           (i.e. initialized in order of declaration). ],
>  if test x$enable_init_priority != xno; then
>    extra_c_flags=-DUSE_INIT_PRIORITY