Hi!
Normally updates to the source directory files are guarded with
--enable-maintainer-mode, e.g. we don't regenerate configure, config.h,
Makefile.in in directories that use automake etc. unless gcc is configured
that way. Otherwise the source tree can't be e.g. stored on a read-only
filesystem etc.
In gcc/Makefile.in we use @MAINT@ for that but that works because
gcc/Makefile is generated by configure. In config/*/t-* files we need to
check $(ENABLE_MAINTAINER_RULES):
# The following provides the variable ENABLE_MAINTAINER_RULES that can
# be used in language Make-lang.in makefile fragments to enable
# maintainer rules. So, ENABLE_MAINTAINER_RULES is 'true' in
# maintainer mode, and '' otherwise.
@MAINT@ ENABLE_MAINTAINER_RULES = true
This is incremental patch does that, tested again on aarch64-linux and
x86_64-linux (cross in that case), ok for trunk?
2022-04-04 Jakub Jelinek <ja...@redhat.com>
PR target/105144
* config/aarch64/t-aarch64 ($(srcdir)/config/aarch64/aarch64-tune.md,
s-aarch64-tune-md, s-mddeps): Only enable the rules if
$(ENABLE_MAINTAINER_RULES) is non-empty.
--- gcc/config/aarch64/t-aarch64.jj 2022-04-04 10:14:30.256323070 +0200
+++ gcc/config/aarch64/t-aarch64 2022-04-04 10:32:55.591651822 +0200
@@ -24,6 +24,7 @@ OPTIONS_H_EXTRA += $(srcdir)/config/aarc
$(srcdir)/config/aarch64/aarch64-fusion-pairs.def \
$(srcdir)/config/aarch64/aarch64-tuning-flags.def
+ifneq ($(strip $(ENABLE_MAINTAINER_RULES)),)
$(srcdir)/config/aarch64/aarch64-tune.md: s-aarch64-tune-md; @true
s-aarch64-tune-md: $(srcdir)/config/aarch64/gentune.sh \
$(srcdir)/config/aarch64/aarch64-cores.def
@@ -35,6 +36,7 @@ s-aarch64-tune-md: $(srcdir)/config/aarc
$(STAMP) s-aarch64-tune-md
s-mddeps: s-aarch64-tune-md
+endif
aarch64-builtins.o: $(srcdir)/config/aarch64/aarch64-builtins.cc $(CONFIG_H) \
$(SYSTEM_H) coretypes.h $(TM_H) \
Jakub
