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Subject: Bug#477001: libdecodeqr: FTBFS: configure: error: C++ compiler cannot create executables
Reply-To: Lucas Nussbaum <lucas@lucas-nussbaum.net>, 477001@bugs.debian.org
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From: Lucas Nussbaum <lucas@lucas-nussbaum.net>
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Package: libdecodeqr
Version: 0.9.3-1
Severity: serious
User: debian-qa@lists.debian.org
Usertags: qa-ftbfs-20080419 qa-ftbfs
Justification: FTBFS on i386

Hi,

During a rebuild of all packages in sid, your package failed to build on i386.

This rebuild was done with gcc 4.3 instead of gcc 4.2, because gcc 4.3 is now
the default on most architectures (even if it's not the case on i386 yet).
Feel free to downgrade this bug to 'important' if your package is only built
on i386, and this bug is specific to gcc 4.3 (i.e the package builds fine with
gcc 4.2).

Relevant part:
> make[1]: Entering directory `/build/user/libdecodeqr-0.9.3/src'
> make[1]: *** No rule to make target `distclean'.  Stop.
> make[1]: Leaving directory `/build/user/libdecodeqr-0.9.3/src'
> make: [clean] Error 2 (ignored)
> rm -rf src/Makefile src/libdecodeqr/Makefile src/sample/Makefile src/sample/simple/Makefile src/sample/webcam/Makefile src/test/Makefile
> dh_clean 
>  dpkg-source -b libdecodeqr-0.9.3
> dpkg-source: info: using source format `1.0'
> dpkg-source: info: building libdecodeqr using existing libdecodeqr_0.9.3.orig.tar.gz
> dpkg-source: info: building libdecodeqr in libdecodeqr_0.9.3-1.diff.gz
> dpkg-source: warning: executable mode 0755 of 'debian/patches/01_debian_compile_support.dpatch' will not be represented in diff
> dpkg-source: warning: executable mode 0755 of 'debian/patches/02_fix_library_build.dpatch' will not be represented in diff
> dpkg-source: info: building libdecodeqr in libdecodeqr_0.9.3-1.dsc
>  debian/rules build
> test -d debian/patched || install -d debian/patched
> dpatch  apply-all  
> applying patch 01_debian_compile_support to ./ ... ok.
> applying patch 02_fix_library_build to ./ ... ok.
> dpatch  cat-all  >>patch-stampT
> mv -f patch-stampT patch-stamp
> dh_testdir
> # Add here commands to configure the package.
> cd src ; \
> 	CPPFLAGS="$CPPFLAGS -I/usr/include/opencv/" ./configure --prefix=/usr \
> 		--bindir=/usr/bin	\
> 		--mandir=\${prefix}/share/man \
> 		--infodir=\${prefix}/share/info \
> 		--sysconfdir=/etc
> checking for g++... g++
> checking for C++ compiler default output file name... 
> configure: error: C++ compiler cannot create executables
> See `config.log' for more details.
> make: *** [configure-stamp] Error 77

The full build log is available from:
   http://people.debian.org/~lucas/logs/2008/04/19

A list of current common problems and possible solutions is available at 
http://wiki.debian.org/qa.debian.org/FTBFS . You're welcome to contribute!

About the archive rebuild: The rebuild was done on about 50 AMD64 nodes
of the Grid'5000 platform, using a clean chroot containing a sid i386
environment.  Internet was not accessible from the build systems.

-- 
| Lucas Nussbaum
| lucas@lucas-nussbaum.net   http://www.lucas-nussbaum.net/ |
| jabber: lucas@nussbaum.fr             GPG: 1024D/023B3F4F |



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