Regstrapped on x86_64-pc-linux-gnu. I've also checked the generated dependency files are correct by hand and "instrumented" the build to fail if two dependency files are the same, by doing the following:
DPOSTCOMPILE = ! test -f $(DEPFILE).Po && mv ... ... and confirmed no further conflicts of this sort happen. OK for trunk? ---------- >8 ---------- Currently, the dependency files for root-file.o and common-file.o were both d/.deps/file.Po, which would cause parallel builds to fail sometimes with: make[3]: Leaving directory '/var/tmp/portage/sys-devel/gcc-14.1.1_p20240511/work/build/gcc' make[3]: Entering directory '/var/tmp/portage/sys-devel/gcc-14.1.1_p20240511/work/build/gcc' mv: cannot stat 'd/.deps/file.TPo': No such file or directory make[3]: *** [/var/tmp/portage/sys-devel/gcc-14.1.1_p20240511/work/gcc-14-20240511/gcc/d/Make-lang.in:421: d/root-file.o] Error 1 shuffle=131581365 Also, this means that dependencies of one of root-file or common-file are missing when developing. After this patch, those two files get assigned dependency files d/.deps/d-root-file.o.Po and d/.deps/d-common-file.o.Po respectively. There are other files with similar conflicts (mangle-package.o, visitor-package.o for instance). gcc/d/ChangeLog: * Make-lang.in: Assign dependency-tracking files better filenames. --- gcc/d/Make-lang.in | 5 +++-- 1 file changed, 3 insertions(+), 2 deletions(-) diff --git a/gcc/d/Make-lang.in b/gcc/d/Make-lang.in index f28761e4b370..25e2b0bbfe94 100644 --- a/gcc/d/Make-lang.in +++ b/gcc/d/Make-lang.in @@ -65,8 +65,9 @@ ALL_DFLAGS = $(DFLAGS-$@) $(GDCFLAGS) -fversion=IN_GCC $(CHECKING_DFLAGS) \ $(WARN_DFLAGS) DCOMPILE.base = $(GDC) -c $(ALL_DFLAGS) -o $@ -DCOMPILE = $(DCOMPILE.base) -MT $@ -MMD -MP -MF $(@D)/$(DEPDIR)/$(*F).TPo -DPOSTCOMPILE = @mv $(@D)/$(DEPDIR)/$(*F).TPo $(@D)/$(DEPDIR)/$(*F).Po +DEPFILE = $(subst /,-,$@) +DCOMPILE = $(DCOMPILE.base) -MT $@ -MMD -MP -MF $(@D)/$(DEPDIR)/$(DEPFILE).TPo +DPOSTCOMPILE = @mv $(@D)/$(DEPDIR)/$(DEPFILE).TPo $(@D)/$(DEPDIR)/$(DEPFILE).Po DLINKER = $(GDC) $(NO_PIE_FLAG) -lstdc++ # Like LINKER, but use a mutex for serializing front end links. -- 2.48.0