Public bug reported:
I got an error when building an executable from shared libraries, using
GCC-4.7.3 provided by the linux distribution. I guess the problem is between
libpng and zlib (the former uses the latter), but I don't know why. The
following problem doesn't appear if I use a GCC version completely compiled by
myself. Moreover, it doesn't occur on at least two other linux distros (Fedora
16 and ubuntu-10.04)
----------------------
Description: when I issue the command:
$ gfortran -o test_muesli_config_fml test_muesli_config_fml.o -fopenmp
-Wl,--rpath,/usr/local/lib/muesli /usr/local/lib/muesli/libfml.so -lstdc++
-Wl,--rpath,/usr/lib /usr/lib/liblapack.so -Wl,--rpath,/usr/lib
/usr/lib/libblas.so -lpng -lz -lpthread -lreadline -lhistory
-Wl,--trace-symbol=gzwrite
I obtained the error:
/usr/local/lib/muesli/libfml.so: reference to gzwrite
/usr/lib/gcc/x86_64-linux-gnu/4.7/../../../x86_64-linux-gnu/libz.so: definition
of gzwrite
/usr/local/lib/muesli/libfml.so: undefined reference to `gzwrite'
/usr/local/lib/muesli/libfml.so: undefined reference to `gzopen'
/usr/local/lib/muesli/libfml.so: undefined reference to `gzclose'
/usr/local/lib/muesli/libfml.so: undefined reference to `gzread'
collect2: error: ld returned 1 exit status
If I remove the -lpng option (which is actually not used), the error
disappear!
In addition, a different try with another program (which USE libpng)
leads to a successful build.
ProblemType: Bug
DistroRelease: Ubuntu 13.04
Package: gcc 4:4.7.3-1ubuntu10
ProcVersionSignature: Ubuntu 3.8.0-31.46-generic 3.8.13.8
Uname: Linux 3.8.0-31-generic x86_64
ApportVersion: 2.9.2-0ubuntu8.3
Architecture: amd64
Date: Wed Oct 9 10:11:16 2013
InstallationDate: Installed on 2012-11-07 (335 days ago)
InstallationMedia: Ubuntu 12.10 "Quantal Quetzal" - Release amd64 (20121017.5)
MarkForUpload: True
SourcePackage: gcc-defaults
UpgradeStatus: Upgraded to raring on 2013-05-12 (149 days ago)
** Affects: gcc-defaults (Ubuntu)
Importance: Undecided
Status: New
** Tags: amd64 apport-bug raring
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https://bugs.launchpad.net/bugs/1237270
Title:
linker: '-lpng' inhibits '-lz'
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