Hi Bernd,
On Thu, 2014-11-20 14:34:00 +0100, Bernd Edlinger bernd.edlin...@hotmail.de
wrote:
This patch updates the files taken from Automake. Committed.
the updated version of missing will confuse the gmp-4.3.2 configure
script if it is installed in-tree with contrib/download_prerequisites
and flex is not installed:
...
checking readline detected... no
checking for bison... (cached) /home/ed/gnu/gcc-5-20141116/missing bison -y
checking for flex... (cached) /home/ed/gnu/gcc-5-20141116/missing flex
checking lex output file root... configure: error: cannot find output from
/home/ed/gnu/gcc-5-20141116/missing flex; giving up
make[3]: *** [config.status] Error 1
make[3]: Leaving directory `/home/ed/gnu/gcc-build-arm-linux-gnueabihf/gmp'
make[2]: *** [all-stage1-gmp] Error 2
make[2]: Leaving directory `/home/ed/gnu/gcc-build-arm-linux-gnueabihf'
make[1]: *** [stage1-bubble] Error 2
make[1]: Leaving directory `/home/ed/gnu/gcc-build-arm-linux-gnueabihf'
make: *** [all] Error 2
previous version of missing flex produced a dummy lex.yy.c,
as does the version in the gmp package, but unfortunately it is
overwritten by the missing script in the gcc tree.
Overridden actually by setting/exporting $FLEX and $LEX to GCC's own
file and calling GMP's `configure' that way.
That's probably just not a supported configuration anymore,
but all previous GCC releases worked without a installed flex tool.
I don't think something change wrt. the GMP version, see
https://gcc.gnu.org/install/prerequisites.html. (And it's the same problem with
current gmp-6.0.0a, so even updating GMP wouldn't help.)
mAYBE the problem goes away if a newer version of gmp is used,
or if the missing flex is not passed down to the gmp configure script,
somehow. Actually, it is not really needed by gmp at all.
It seems the only flex'able source file (in both GMP-4.3.2 and current
6.0.0a) is a demo file.
I tried to add this hunk from the old version and it made, the gmp configure
script worked again:
--- missing.orig 2014-11-16 14:07:13.0 +
+++ missing 2014-11-19 15:01:57.168967538 +
@@ -172,6 +172,21 @@
echo You should only need it if you modified a '.l' file.
echo You may want to install the Fast Lexical Analyzer package:
echo $flex_URL
+ rm -f lex.yy.c
+ if test $# -ne 1; then
+eval LASTARG=\${$#}
+case $LASTARG in
+*.l)
+ SRCFILE=`echo $LASTARG | sed 's/l$/c/'`
+ if test -f $SRCFILE; then
+ cp $SRCFILE lex.yy.c
+ fi
+;;
+esac
+ fi
+ if test ! -f lex.yy.c; then
+ echo 'main() { return 0; }'lex.yy.c
+ fi
;;
help2man*)
echo You should only need it if you modified a dependency \
What do you think?
That patch defeats my attempt to re-sync with upstream files. :) The
Automake guys decided that faking a tool by simulating a successful
run isn't that much of a good idea, and thinking about it, this looks
like a good decision.
I actually kind of think that this is simply a small bug in GMP. It
shouldn't require a working flex just for potentially building some
demo file. After all, the release tarballs could just contain the .c
file. No need for the lex file at all!
However, I *think* the real problem is the way flags are passed.
Top-level `configure' doesn't find `flex' (okay) and sets
FLEX=./missing flex. This $FLEX gets passed by Makefile down to
GMP's `configure', which by now should, IMO, point to a /working/
flex. That way, GMP's `configure' of course will choke finding the
generated output file.
So what shall we do now? I'd be quite okay with reverting my
`missing' update for now, until this is actually fixed. However, It
would be nice if we'd discuss that, along with the GMP guys.
Another fix (or is it a workaround?) would be to not hand down $FLEX
and $LEX:
diff --git a/Makefile.def b/Makefile.def
index 40bbca9..7b988fe 100644
--- a/Makefile.def
+++ b/Makefile.def
@@ -229,13 +229,11 @@ flags_to_pass = { flag= CC_FOR_BUILD ; };
flags_to_pass = { flag= CFLAGS_FOR_BUILD ; };
flags_to_pass = { flag= CXX_FOR_BUILD ; };
flags_to_pass = { flag= EXPECT ; };
-flags_to_pass = { flag= FLEX ; };
flags_to_pass = { flag= INSTALL ; };
flags_to_pass = { flag= INSTALL_DATA ; };
flags_to_pass = { flag= INSTALL_PROGRAM ; };
flags_to_pass = { flag= INSTALL_SCRIPT ; };
flags_to_pass = { flag= LDFLAGS_FOR_BUILD ; };
-flags_to_pass = { flag= LEX ; };
flags_to_pass = { flag= M4 ; };
flags_to_pass = { flag= MAKE ; };
flags_to_pass = { flag= RUNTEST ; };
(...and regenerate Makefile{,.in}.)
However, we need to discuss that. I'll head over to the GMP bugs
mailing list and discuss your build error over there.
MfG, JBG
--
Jan-Benedict Glaw jbg...@lug-owl.de +49-172-7608481
Signature of: Friends are relatives you make for yourself.
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