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https://bugzilla.mindrot.org/show_bug.cgi?id=1559





--- Comment #2 from Brice Lin <Brice.Lin@gmail.com> 2009-02-21 18:28:26 ---
I pulled the tarball from
ftp://ftp.openbsd.org/pub/OpenBSD/OpenSSH/portable/openssh-5.1p1.tar.gz
to generate the error. Did you use that as well?

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--- Comment #3 from Brice Lin <Brice.Lin@gmail.com> 2009-02-21 19:51:22 ---
$ env LD=/tmp/xxld AR=/tmp/har ./configure
$ egrep "^(LD|AR)=" Makefile
LD=/tmp/xxld
AR=/tmp/har

$ env LD="ld" AR="foo" ./configure
$ egrep "^(LD|AR)=" Makefile
LD=ld
AR=/usr/bin/ar

For some reason, the command on top works differently than the one on
bottom.

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--- Comment #4 from Damien Miller <djm@mindrot.org> 2009-02-22 08:50:17 ---
do you really have a semi-functional ar-replacement called "foo" in
your path? autoconf checks that the selected linker at least exists and
is executable. Furthermore if the linker exists, but is not functional,
then it will cause configure test failures.

Try copying your /usr/bin/ar to a different path (e.g. /tmp/har) and
trying it.

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--- Comment #5 from Brice Lin <Brice.Lin@gmail.com> 2009-02-22 09:39:10 ---
I need to compile with LLVM, which requires pointing AR to llvm-ar
(which exists). That's how I encountered the bug in the first place.
What I posted just serves as an example test case of the issue.

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--- Comment #6 from Damien Miller <djm@mindrot.org> 2009-02-22 10:10:51 ---
It is an invalid testcase for the reasons that I just described.

If you are trying to use llvm-ar then why not show an example with
llvm-ar? You can look at the details of what searches are being
performed in config.log.

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--- Comment #7 from Brice Lin <Brice.Lin@gmail.com> 2009-02-22 11:45:53 ---
$ env CC="llvm-gcc" LD="llvm-ld" AR="llvm-ar" RANLIB="llvm-ranlib"
./configure
$ egrep "^(CC|LD|AR|RANLIB)=" Makefile
CC=llvm-gcc
LD=llvm-ld
AR=/usr/bin/ar
RANLIB=llvm-ranlib
$ llvm-ar
llvm-ar: Not enough positional command line arguments specified!
Must specify at least 2 positional arguments: See: llvm-ar --help

After running the above commands, I combed through config.log for
llvm-ar, but nothing shows up. I've included what seems like the
relevant lines from config.log. What else should I look for to debug
this?

$ egrep "( |\W)(ar|ranlib)\W*$" config.log
configure:4038: checking for ranlib
configure:4065: result: llvm-ranlib
configure:4256: checking for ar
configure:4274: found /usr/bin/ar
configure:4286: result: /usr/bin/ar
ac_cv_path_AR=/usr/bin/ar
ac_cv_prog_ac_ct_RANLIB=llvm-ranlib
AR='/usr/bin/ar'
RANLIB='llvm-ranlib'

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--- Comment #8 from Damien Miller <djm@mindrot.org> 2009-02-22 19:39:22 ---
Try an absolute path for AR (I have no idea why autoconf demands this)

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--- Comment #9 from Brice Lin <Brice.Lin@gmail.com> 2009-02-22 21:56:14 ---
Thanks, setting AR to the absolute path of llvm-ar works. It still
seems like a bug with Autoconf though. There's no reason for it to
require absolute paths, especially because it perfectly detects them
for the other environment variables (like RANLIB). Can you do anything
about it?

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--- Comment #10 from Damien Miller <djm@mindrot.org> 2009-02-23 08:07:37 ---
Probably not - it is buried deep in the guts of autoconf (... and you
thought this thing smelt bad on the outside). I'd suggest filing a but
on them.

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