Hi Max,

Indeed, installing zlib1g-dev fixed the problem.

This was a package I installed on the other machine, because this was needed to compile some other stuff, so that explains the difference between the behavious of the two machines, as well.

Thanks for the help,
Gabor

On Sat, 24 Nov 2018, Max Horn wrote:

Hi Gabor,

Am 24.11.2018 um 10:16 schrieb Gábor Horváth <ghorv...@science.unideb.hu>:


Hi All,

At the "LINK libgap.la" stage of the compilation, I receive the following error 
message:

That means that GAP could not find the zlib header files and thus had to 
compile its own version. You can avoid the problem by  installing a suitable 
package with your package manager; typically something like zlib-dev or 
libz-dev.

Or use GAP 4.10.0 instead of a GAP development version, then you shouldn't have 
this problem either :-)

Cheers,
Max




*** Warning: Linking the shared library libgap.la against the
*** static library /home/ghorvath/work/gap/extern/install/zlib/lib/libz.a is 
not portable!
/usr/bin/ld: /home/ghorvath/work/gap/extern/install/zlib/lib/libz.a(gzlib.o): 
relocation R_X86_64_PC32 against symbol `gzrewind' can not be used when making 
a shared object; recompile with -fPIC
/usr/bin/ld: final link failed: Bad value
collect2: error: ld returned 1 exit status
Makefile.rules:361: recipe for target 'libgap.la' failed
make: *** [libgap.la] Error 1



I use debian stretch x64, and what is more puzzling is that I have another 
machine, with debian stretch x64, which doesn't produce this error. I am trying 
to compile the git development version of gap, commit ebe360c59300c.

And of course, after this error, several of the packages won't compile, they 
complain not finding the appropriate information about gap in the sysinfo.gap 
file.

What could cause the error?

Thanks,
Gabor

                       Horvath Gabor
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                                                Horvath Gabor
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