"Martin Gansser" <martin.gans...@gmail.com> writes:

> Hi,
>
> when compiling openclonk [1] on rawhide it fails with this error message [2]:
> /usr/bin/cmake -E cmake_link_script CMakeFiles/c4group.dir/link.txt 
> --verbose=1
> /usr/bin/g++ -O2 -flto=auto -ffat-lto-objects -fexceptions -g 
> -grecord-gcc-switches -pipe -Wall -Wno-complain-wrong-lang 
> -Wno-error=format-security -Wp,-U_FORTIFY_SOURCE,-D_FORTIFY_SOURCE=3 
> -Wp,-D_GLIBCXX_ASSERTIONS -specs=/usr/lib/rpm/redhat/redhat-hardened-cc1 
> -fstack-protector-strong -specs=/usr/lib/rpm/redhat/redhat-annobin-cc1  -m64 
> -march=x86-64 -mtune=generic -fasynchronous-unwind-tables 
> -fstack-clash-protection -fcf-protection -fno-omit-frame-pointer 
> -mno-omit-leaf-frame-pointer -Wall -Wextra -Wredundant-decls -Wendif-labels 
> -Wpointer-arith -Wcast-qual -Wcast-align -Wwrite-strings -Winit-self 
> -Wsign-promo -Wno-reorder -Wno-unused-parameter -Wnon-virtual-dtor 
> -Woverloaded-virtual -Wformat-security -Werror=delete-incomplete -DNDEBUG 
> -flto=auto -fno-fat-lto-objects -Wl,-z,relro -Wl,--as-needed  
> -Wl,-z,pack-relative-relocs -Wl,-z,now 
> -specs=/usr/lib/rpm/redhat/redhat-hardened-ld-errors 
> -specs=/usr/lib/rpm/redhat/redhat-hardened-ld 
> -specs=/usr/lib/rpm/redhat/redhat-annobin-cc1  
 -W
>  l,--build-id=sha1 -specs=/usr/lib/rpm/redhat/redhat-package-notes 
> CMakeFiles/c4group.dir/c4group_autogen/mocs_compilation.cpp.o 
> CMakeFiles/c4group.dir/src/c4group/C4GroupMain.cpp.o -o c4group  liblibmisc.a 
> /usr/lib64/libz.so -lpthread -lrt 
> make[2]: Leaving directory 
> '/builddir/build/BUILD/openclonk-701bcf38c9f3c4877e1b4a8651b9ce922b15969e/build'
> /usr/bin/ld: /tmp/ccgvFyfu.ltrans1.ltrans.o: in function `c4_gzread':
> /builddir/build/BUILD/openclonk-701bcf38c9f3c4877e1b4a8651b9ce922b15969e/src/zlib/gzio.c:450:(.text+0x3fd0):
>  undefined reference to `zmemcpy'
> collect2: error: ld returned 1 exit status
>
> How can this be fixed ??

The fastest way to work around this issue is by defining HAVE_MEMCPY
when building gzio.c.
You probably want to guarantee that other C macros are defined as well,
e.g. STDC.

In the long term, I suggest to work with upstream in order to stop using
zutil.h.  This is a zlib internal header that provides internal types
and functions and is strongly dependent on how zlib was built.
I also suggest to stop distributing their own gz* functions and reuse
the functions provided by the OS. This will guarantee that openclonk
will receive the latest fixes to that code.

-- 
Tulio Magno
--
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