I was recently bootstrapping GCC4 on Tru64. One thing that tripped me up a
couple times was an ICE resulting from an invalid version_string (""). I traced
this back to the following fragment in gcc/Makefile, where BASEVER_c is
assigned:
BASEVER := $(srcdir)/BASE-VER # 4.x.y
[...]
BASEVER_c := $(shell cat $(BASEVER))
For some reason, the value of BASEVER_c was empty. I had the source tree on
NFS, and figured that some transient error caused $(BASEVER) to either
disappear momentarily, or briefly appear as an empty file. (It's difficult to
say, because the rest of the build proceeded with no errors of this sort
whatsoever.)
Whatever the cause, the makefile as currently written does not check for an
empty value of BASEVER_c, and the ICE that later results from this is
magnitudes of order more difficult to diagnose for most users. I would like to
submit a patch to the makefile, then, that immediately throws an error if
BASEVER_c is empty.
--
Summary: [PATCH] Check for valid value of BASEVER
Product: gcc
Version: 4.2.3
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: other
AssignedTo: unassigned at gcc dot gnu dot org
ReportedBy: skunk at iskunk dot org
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=35199
