Re: [PATCH] modula2: Fix bootstrap

[Jakub Jelinek <jakub@redhat.com>]

On Wed, Jun 07, 2023 at 09:42:22AM +0100, Andre Vieira (lists) wrote:
> I do need those includes and sorry I broke your bootstrap it didn't show up
> on my aarch64-unknown-linux-gnu bootstrap, I'm guessing the rules there were
> just run in a different order. Glad you were able to fix it :)

Unfortunately, it doesn't really work.
My x86_64-linux bootstrap today died again with:
In file included from ../../gcc/m2/gm2-gcc/gcc-consolidation.h:74,
                 from ../../gcc/m2/gm2-lang.cc:24:
../../gcc/internal-fn.h:24:10: fatal error: insn-opinit.h: No such file or directory
   24 | #include "insn-opinit.h"
      |          ^~~~~~~~~~~~~~~
compilation terminated.
/home/jakub/src/gcc/obj36/./prev-gcc/xg++ -B/home/jakub/src/gcc/obj36/./prev-gcc/ -B/usr/local/x86_64-pc-linux-gnu/bin/ -nostdinc++ -B/home/jakub/src/gcc/obj36/prev-x86_64-pc-linux-gnu/libstdc++-v3/src/.libs -B/home/jakub/src/gcc/obj36/prev-x86_64-pc-linux-gnu/libstdc++-v3/libsupc++/.libs  -I/home/jakub/src/gcc/obj36/prev-x86_64-pc-linux-gnu/libstdc++-v3/include/x86_64-pc-linux-gnu  -I/home/jakub/src/gcc/obj36/prev-x86_64-pc-linux-gnu/libstdc++-v3/include  -I/home/jakub/src/gcc/libstdc++-v3/libsupc++ -L/home/jakub/src/gcc/obj36/prev-x86_64-pc-linux-gnu/libstdc++-v3/src/.libs -L/home/jakub/src/gcc/obj36/prev-x86_64-pc-linux-gnu/libstdc++-v3/libsupc++/.libs  -fno-PIE -c -g   -g -O2 -fchecking=1 -DIN_GCC     -fno-exceptions -fno-rtti -fasynchronous-unwind-tables -W -Wall -Wno-narrowing -Wwrite-strings -Wcast-qual  -fno-common  -DHAVE_CONFIG_H \
             -I. -Im2/gm2-gcc -I../../gcc -I../../gcc/m2/gm2-gcc -I../../gcc/../include  -I../../gcc/../libcpp/include -I../../gcc/../libcody  -I../../gcc/../libdecnumber -I../../gcc/../libdecnumber/bid -I../libdecnumber -I../../gcc/../libbacktrace   -I. -Im2/gm2-gcc -I../../gcc -I../../gcc/m2/gm2-gcc -I../../gcc/../include  -I../../gcc/../libcpp/include -I../../gcc/../libcody  -I../../gcc/../libdecnumber -I../../gcc/../libdecnumber/bid -I../libdecnumber -I../../gcc/../libbacktrace  ../../gcc/m2/gm2-gcc/m2type.cc -o m2/gm2-gcc/m2type.o
make[3]: *** [../../gcc/m2/Make-lang.in:570: m2/gm2-lang.o] Error 1
make[3]: *** Waiting for unfinished jobs....
errors.  Dunno what is going on.
I've tried
--- gcc/m2/Make-lang.in.jj	2023-06-07 15:56:07.112684198 +0200
+++ gcc/m2/Make-lang.in	2023-06-13 16:08:55.409364765 +0200
@@ -511,7 +511,7 @@ GM2_LIBS_BOOT     = m2/gm2-compiler-boot
                     m2/gm2-libs-boot/libgm2.a \
                     $(GM2-BOOT-O)
 
-$(GM2_C_OBJS) : | $(generated_files)
+m2_OBJS = $(GM2_C_OBJS)
 
 cc1gm2$(exeext): m2/stage1/cc1gm2$(exeext) $(m2.prev)
 	cp -p $< $@

but that doesn't really work either, this time not just random bootstrap
breakages from time to time, but all the time.
Including GM2_C_OBJS in m2_OBJS is I think the right thing, but that
results in predefining IN_GCC_FRONTEND macro and we have e.g.

/* Front ends should never have to include middle-end headers.  Enforce
   this by poisoning the header double-include protection defines.  */
#ifdef IN_GCC_FRONTEND
#pragma GCC poison GCC_RTL_H GCC_EXCEPT_H GCC_EXPR_H
#endif

in system.h to make sure that FE sources don't include rtl.h, except.h,
expr.h.  But m2/gm2-gcc/gcc-consolidation.h includes tons of the RTL
headers, rtl.h, df.h (twice), except.h; why?
Also, seems one of GM2_C_OBJS is some special copy of stor-layout.cc
which really isn't a FE file and so needs the RTL-ish headers.

	Jakub