On Thu, Sep 7, 2023 at 11:30 AM Richard Sandiford via Gcc-patches
<gcc-patches@gcc.gnu.org> wrote:
>
> When I tried to use config-list.mk, the build for every triple except
> the build machine's failed for m2. This is because, unlike other
> languages, m2 builds target objects during all-gcc. The build will
> therefore fail unless you have access to an appropriate binutils
> (or an equivalent). That's quite a big ask for over 100 targets. :)
>
> This patch therefore makes m2 an optional inclusion.
>
> Doing that wasn't entirely straightforward though. The current
> configure line includes "--enable-languages=all,...", which means
> that the "..." can only force languages to be added that otherwise
> wouldn't have been. (I.e. the only effect of the "..." is to
> override configure autodetection.)
>
> The choice of all,ada and:
>
> # Make sure you have a recent enough gcc (with ada support) in your path so
> # that --enable-werror-always will work.
>
> make it clear that lack of GNAT should be a build failure rather than
> silently ignored. This predates the D frontend, which requires GDC
> in the same way that Ada requires GNAT. I don't know of a reason
> why D should be treated differently.
>
> The patch therefore expands the "all" into a specific list of
> languages.
>
> That in turn meant that Fortran had to be handled specially,
> since bpf and mmix don't support Fortran.
>
> Perhaps there's an argument that m2 shouldn't build target objects
> during all-gcc,
Yes, I think that's unfortunate - can you open a bugreport for this?
> but (a) it works for practical usage and (b) the
> patch is an easy workaround. I'd be happy for the patch to be
> reverted if the build system changes.
>
> OK to install?
OK.
> Richard
>
>
> gcc/
> * contrib/config-list.mk (OPT_IN_LANGUAGES): New variable.
> ($(LIST)): Replace --enable-languages=all with a specifc list.
> Disable fortran on bpf and mmix. Enable the languages in
> OPT_IN_LANGUAGES.
> ---
> contrib/config-list.mk | 17 ++++++++++++++---
> 1 file changed, 14 insertions(+), 3 deletions(-)
>
> diff --git a/contrib/config-list.mk b/contrib/config-list.mk
> index e570b13c71b..50ecb014bc0 100644
> --- a/contrib/config-list.mk
> +++ b/contrib/config-list.mk
> @@ -12,6 +12,11 @@ TEST=all-gcc
> # supply an absolute path.
> GCC_SRC_DIR=../../gcc
>
> +# Define this to ,m2 if you want to build Modula-2. Modula-2 builds target
> +# objects during all-gcc, so it can only be included if you've installed
> +# binutils (or an equivalent) for each target.
> +OPT_IN_LANGUAGES=
> +
> # Use -j / -l make arguments and nice to assure a smooth resource-efficient
> # load on the build machine, e.g. for 24 cores:
> # svn co svn://gcc.gnu.org/svn/gcc/branches/foo-branch gcc
> @@ -126,17 +131,23 @@ $(LIST): make-log-dir
> TGT=`echo $@ | awk 'BEGIN { FS = "OPT" }; { print $$1 }'` &&
> \
> TGT=`$(GCC_SRC_DIR)/config.sub $$TGT` &&
> \
> case $$TGT in
> \
> - *-*-darwin* | *-*-cygwin* | *-*-mingw* | *-*-aix* |
> bpf-*-*) \
> + bpf-*-*)
> \
> ADDITIONAL_LANGUAGES="";
> \
> ;;
> \
> - *)
> \
> + *-*-darwin* | *-*-cygwin* | *-*-mingw* | *-*-aix* |
> bpf-*-*) \
> + ADDITIONAL_LANGUAGES=",fortran";
> \
> + ;;
> \
> + mmix-*-*)
> \
> ADDITIONAL_LANGUAGES=",go";
> \
> ;;
> \
> + *)
> \
> + ADDITIONAL_LANGUAGES=",fortran,go";
> \
> + ;;
> \
> esac &&
> \
> $(GCC_SRC_DIR)/configure
> \
> --target=$(subst SCRIPTS,`pwd`/../scripts/,$(subst
> OPT,$(empty) -,$@)) \
> --enable-werror-always ${host_options}
> \
> - --enable-languages=all,ada$$ADDITIONAL_LANGUAGES;
> \
> +
> --enable-languages=c,ada,c++,d,lto,objc,obj-c++,rust$$ADDITIONAL_LANGUAGES$(OPT_IN_LANGUAGES);
> \
> ) > log/$@-config.out 2>&1
>
> $(LOGFILES) : log/%-make.out : %
> --
> 2.25.1
>
