Non-parallel build can fail, depending on the ./configure parameters -
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=106472 .
The change below does fix the problem.
I do not understand the build system to say, that this is the best
approach, so if there are questions I might or might not be able to
answer them.
I tried different things, this worked on the releases/gcc-13 branch. On
the master branch last weekend the problem was that stage2 and stage3
results are not equal, so I have not verified this change there.
depend= in Makefile.def seem to have only effect if bootstrapping is
involved and gcc/go/config-lang.in does not have boot_language=yes .
The lines below are present in the Makefile.in:@unless gcc-bootstrap
snippet. Actually I think ./configure --enable-languages=all and then
serial build work, because this implied D and it does imply
bootstrapping for libbacktrace and libatomic. I also do not want to
invest much more time on this.
I do not know, if 2×`maybe-` is necessary.
diff --git a/Makefile.in b/Makefile.in
index 06a9398e172..236e5cda942 100644
--- a/Makefile.in
+++ b/Makefile.in
@@ -66481,6 +66481,7 @@ configure-target-libgfortran:
maybe-all-target-libquadmath
@if gcc-bootstrap
+all-target-libgo: maybe-all-target-libbacktrace
maybe-all-target-libatomic
configure-gnattools: stage_last
configure-libcc1: stage_last
configure-c++tools: stage_last
diff --git a/Makefile.tpl b/Makefile.tpl
index dfbd74b68f8..98160c7626b 100644
--- a/Makefile.tpl
+++ b/Makefile.tpl
@@ -1952,7 +1952,7 @@ configure-target-[+module+]: maybe-all-gcc[+
(define dep-maybe (lambda ()
(if (exist? "hard") "" "maybe-")))
- ;; dep-kind returns returns "prebootstrap" for configure or build
+ ;; dep-kind returns "prebootstrap" for configure or build
;; dependencies of bootstrapped modules on a build module
;; (e.g. all-gcc on all-build-bison); "normal" if the dependency is
;; on an "install" target, or if the dependence module is not
@@ -2017,6 +2017,7 @@ configure-target-[+module+]: maybe-all-gcc[+
[+ ESAC +][+ ENDFOR dependencies +]
@if gcc-bootstrap
+all-target-libgo: maybe-all-target-libbacktrace
maybe-all-target-libatomic
[+ FOR dependencies +][+ CASE (dep-kind) +]
[+ == "postbootstrap" +][+ (make-postboot-dep) +][+ ESAC +][+
ENDFOR dependencies +]@endif gcc-bootstrap
