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Re: [Mingw-cross-env-list] Re: zlib 1.2.5 fails on Ubuntu Linux (amd64)
From: |
Volker Grabsch |
Subject: |
Re: [Mingw-cross-env-list] Re: zlib 1.2.5 fails on Ubuntu Linux (amd64) -- adler32.o: No such file or directory -> Solved |
Date: |
Sat, 19 Jun 2010 20:53:45 +0200 |
User-agent: |
Mutt/1.5.18 (2008-05-17) |
Garth Dahlstrom <address@hidden> schrieb:
> Adding a CC define to the zlib.mk solved it! Patch is attached.
Thanks for providing a working solution. However, I can't accept it
because we need to address the real cause of the problem.
The real issue is that the CC environment variable is exported to
sub processes (here: Zlib's ./configure). That simply shouldn't
happen! We try to explicitly unset all troublesome environment
variables in the main Makefile:
# unset any environment variables which might cause trouble
AR =
CC =
CFLAGS =
...
However, those empty assignment don't really remove the variables. The
variables are still exported to sub processes as "" (empty strings).
Most scripts are satisfied with that, because they only check whether
"$CC" evaluates to "", which is true for empty as well as undefined
environment variables.
In contrast, Zlib's ./configure script really checks whether $CC
is defined and only replaces it with "${CROSS_PREFIX}gcc" if $CC
was undefined, using the "${VAR-default}" construct:
(./tmp-zlib/zlib-1.2.5/configure)
...
cc=${CC-${CROSS_PREFIX}gcc}
...
So we have to fix the cleanup code of our Makefile. Note that there
is no "undef" or "unset" command in GNU Make. However, there is the
"unexport" command which prevents Make variables to be exported:
# unexport any environment variables that might cause trouble
unexport AR
unexport CC
unexport CFLAGS
...
Since those variables are no longer exported, there is no need to
unset or to empty them anymore.
I just committed the corresponding patch:
http://hg.savannah.gnu.org/hgweb/mingw-cross-env/rev/a484e245ee20
Garth, please check whether that solves the issue on your machine.
Greets,
Volker
--
Volker Grabsch
---<<(())>>---
Administrator
NotJustHosting GbR
- [Mingw-cross-env-list] zlib 1.2.5 fails on Ubuntu Linux (amd64) -- adler32.o: No such file or directory, Garth Dahlstrom, 2010/06/17
- [Mingw-cross-env-list] Re: zlib 1.2.5 fails on Ubuntu Linux (amd64) -- adler32.o: No such file or directory, Garth Dahlstrom, 2010/06/17
- [Mingw-cross-env-list] Re: zlib 1.2.5 fails on Ubuntu Linux (amd64) -- adler32.o: No such file or directory, Garth Dahlstrom, 2010/06/17
- Re: [Mingw-cross-env-list] Re: zlib 1.2.5 fails on Ubuntu Linux (amd64) -- adler32.o: No such file or directory, Tony Theodore, 2010/06/18
- Re: [Mingw-cross-env-list] Re: zlib 1.2.5 fails on Ubuntu Linux (amd64) -- adler32.o: No such file or directory, Garth Dahlstrom, 2010/06/18
- Re: [Mingw-cross-env-list] Re: zlib 1.2.5 fails on Ubuntu Linux (amd64) -- adler32.o: No such file or directory, Tony Theodore, 2010/06/18
- Re: [Mingw-cross-env-list] Re: zlib 1.2.5 fails on Ubuntu Linux (amd64) -- adler32.o: No such file or directory, Garth Dahlstrom, 2010/06/18
- Re: [Mingw-cross-env-list] Re: zlib 1.2.5 fails on Ubuntu Linux (amd64) -- adler32.o: No such file or directory, Tony Theodore, 2010/06/18
- [Mingw-cross-env-list] Re: zlib 1.2.5 fails on Ubuntu Linux (amd64) -- adler32.o: No such file or directory -> Solved, Garth Dahlstrom, 2010/06/18
- Re: [Mingw-cross-env-list] Re: zlib 1.2.5 fails on Ubuntu Linux (amd64) -- adler32.o: No such file or directory -> Solved, Volker Grabsch, 2010/06/19
- Re: [Mingw-cross-env-list] Re: zlib 1.2.5 fails on Ubuntu Linux (amd64) -- adler32.o: No such file or directory -> Solved,
Volker Grabsch <=
- Re: [Mingw-cross-env-list] Re: zlib 1.2.5 fails on Ubuntu Linux (amd64) -- adler32.o: No such file or directory -> Solved, Volker Grabsch, 2010/06/19