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From: hreba <f_hreba@yahoo.com.br>
Newsgroups: comp.lang.ada
Subject: Undefined reference in gtkada
Date: Sat, 15 Aug 2020 14:00:09 +0200
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My platform is a PC running Linux Mint 20 with a fresh install of GNAT 
and gtkada 2020 from the Adacore community site.

Before executing the script gtkada-env.sh, I have

ldd /usr/lib/x86_64-linux-gnu/libpng16.so.16
	linux-vdso.so.1 (0x00007ffeb55a4000)
	libz.so.1 => /lib/x86_64-linux-gnu/libz.so.1 (0x00007f61f24db000)
	libm.so.6 => /lib/x86_64-linux-gnu/libm.so.6 (0x00007f61f238c000)
	libc.so.6 => /lib/x86_64-linux-gnu/libc.so.6 (0x00007f61f219a000)
	/lib64/ld-linux-x86-64.so.2 (0x00007f61f255b000)

Everything ok. Afterwards I get

ldd /usr/lib/x86_64-linux-gnu/libpng16.so.16
/usr/lib/x86_64-linux-gnu/libpng16.so.16: /opt/GNAT/2020/lib/libz.so.1: 
version `ZLIB_1.2.9' not found (required by 
/usr/lib/x86_64-linux-gnu/libpng16.so.16)
	linux-vdso.so.1 (0x00007ffecbde6000)
	libz.so.1 => /opt/GNAT/2020/lib/libz.so.1 (0x00007f49c989e000)
	libm.so.6 => /lib/x86_64-linux-gnu/libm.so.6 (0x00007f49c9725000)
	libc.so.6 => /lib/x86_64-linux-gnu/libc.so.6 (0x00007f49c9533000)
	/lib64/ld-linux-x86-64.so.2 (0x00007f49c9af1000)

Is that "ZLIB_1.2.9' not found" a gtkada error or must I install 
anything else?
-- 
Frank Hrebabetzky, Kronach	+49 / 9261 / 950 0565