--- Begin Message ---
- To: Debian Bug Tracking System <submit@bugs.debian.org>
- Subject: clp: configure script misdetects tons of things
- From: Helmut Grohne <helmut@subdivi.de>
- Date: Sun, 19 Mar 2023 21:11:10 +0100
- Message-id: <20230319201110.GA880423@subdivi.de>
Source: clp
Version: 1.17.6-3
Severity: important
User: debian-cross@lists.debian.org
Usertags: ftcbfs
Hi,
I happened to look into a clp cross build failure, but what I found was
more problems. If you look at configure output, you see this:
| checking whether the compiler supports GNU C... no
| checking whether gcc accepts -g... no
| checking for gcc option to enable C11 features... unsupported
| checking for gcc option to enable C99 features... unsupported
| checking for gcc option to enable C89 features... unsupported
Quite obviously, this is all wrong and autoconf will turn on quite a bit
of barely tested workarounds due to these misdetections.
So I looked into why this happens and ultimately, all of these use
ac_fn_c_try_compile and they all say "$? = 0" followed by "failed
program" in config.log. So compilation was successful, but it was
treated as failure, because conftest.$ac_objext didn't exist. As it
happens, ac_objext is undefined, because _AC_COMPILER_OBJEXT hasn't been
run yet. It gets run later and then ac_fn_c_try_compile actually works,
but when these tests are rerun, their cached values are used.
I looked into the m4 files to see why this would happen, but I ended up
not identifying the cause. However, if you export ac_objext=o,
ac_fn_c_try_compile actually works and these things get correctly
detected. As it happens, this also fixes cross compilation, but really
the misdetections are a problem and should be fixed even for native
builds. I'm attaching a patch that works around the issue by setting
ac_objext, but I hope you can find a better solution.
Helmut
diff --minimal -Nru clp-1.17.6/debian/changelog clp-1.17.6/debian/changelog
--- clp-1.17.6/debian/changelog 2022-11-27 05:27:26.000000000 +0100
+++ clp-1.17.6/debian/changelog 2023-03-19 19:40:11.000000000 +0100
@@ -1,3 +1,9 @@
+clp (1.17.6-4) UNRELEASED; urgency=medium
+
+ * Work around severe configure misdetections. (Closes: #-1)
+
+ -- Helmut Grohne <helmut@subdivi.de> Sun, 19 Mar 2023 19:40:11 +0100
+
clp (1.17.6-3) unstable; urgency=medium
* QA upload.
diff --minimal -Nru clp-1.17.6/debian/rules clp-1.17.6/debian/rules
--- clp-1.17.6/debian/rules 2022-11-27 05:27:26.000000000 +0100
+++ clp-1.17.6/debian/rules 2023-03-19 19:40:11.000000000 +0100
@@ -9,7 +9,10 @@
dh_autoreconf autoreconf -- --force --install --no-recursive --include=BuildTools
override_dh_auto_configure:
- dh_auto_configure -- --enable-static --enable-dot --enable-dependency-linking
+ # The configure script is broken as it uses ac_fn_c_try_compile before
+ # having run _AC_COMPILER_OBJEXT, so supply ac_objext to make it barely
+ # work.
+ ac_objext=o dh_auto_configure -- --enable-static --enable-dot --enable-dependency-linking
override_dh_auto_build:
dh_auto_build
--- End Message ---
--- Begin Message ---
Source: clp
Source-Version: 1.17.9+ds-1
Done: Pierre Gruet <pgt@debian.org>
We believe that the bug you reported is fixed in the latest version of
clp, which is due to be installed in the Debian FTP archive.
A summary of the changes between this version and the previous one is
attached.
Thank you for reporting the bug, which will now be closed. If you
have further comments please address them to 1033211@bugs.debian.org,
and the maintainer will reopen the bug report if appropriate.
Debian distribution maintenance software
pp.
Pierre Gruet <pgt@debian.org> (supplier of updated clp package)
(This message was generated automatically at their request; if you
believe that there is a problem with it please contact the archive
administrators by mailing ftpmaster@ftp-master.debian.org)
-----BEGIN PGP SIGNED MESSAGE-----
Hash: SHA512
Format: 1.8
Date: Sun, 21 Jan 2024 21:42:16 +0100
Source: clp
Architecture: source
Version: 1.17.9+ds-1
Distribution: unstable
Urgency: medium
Maintainer: Debian Science Maintainers <debian-science-maintainers@lists.alioth.debian.org>
Changed-By: Pierre Gruet <pgt@debian.org>
Closes: 934083 1014561 1033211 1043929
Changes:
clp (1.17.9+ds-1) unstable; urgency=medium
.
* New upstream version 1.17.9+ds
* Raising Standards version to 4.6.2
- Rules-Requires-Root: no
* Adopting the package (Closes: #934083)
* Refreshing d/copyright
* Depending on debhelper-compat 13
* Removing unneeded versioned (build-)dependencies
* Updating the list of files to exclude when repacking
* Rewriting d/rules without autoreconf (Closes: #1033211)
- Also listing files that should not be installed in d/not-installed
* Removing embedded build path from Makefile and generated HTML files
(Closes: #1014561)
* Overriding the clean target so that package can be built twice in a row
(Closes: #1043929)
* Building with NDEBUG to disable asserts
* Adding a Lintian override for shared libs' package name
* Fixing a minor spelling mistake in the code
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