0009893: Linux: libs/libstdc++.so.6 causing linking problem

Notes
(0035570) ShimmerFairy (reporter) 2016-07-07 13:08	At first glance, I'd guess a problem involving the ABI changes in gcc 5.0, or maybe the changes in 6.0 (e.g. defaulting to gnu++14 instead of gnu++98), depending on what version your system libraries are compiled on and what DF's libstdc++ is for.

(0035571) lethosor (manager) 2016-07-07 16:23	Toady's using GCC 4.8 on Linux. It looks like /lib64/libGLU.so.1 requires a libstdc++ from GCC 4.9 or 5.1, going by https://gcc.gnu.org/onlinedocs/libstdc++/manual/abi.html. [^] Removing the libstdc++ will break compatibility completely for people whose systems don't distribute GCC 4.8, so I don't know if there's much that can be done here.

(0035576) Khym Chanur (reporter) 2016-07-07 21:29	Maybe the df script could check what version of libstdc++ is installed, and depending upon the version set or not set the environmental variable LD_LIBRARY_PATH to "."; of course, that would require removing the "Library rpath = [$ORIGIN]" trick from the executable. For the record, my install is using version 6.1.1-3 of GCC and libstdc++, and the path of the system libstdc++ library is /lib64/libstdc++.so.6.0.22

(0035577) ShimmerFairy (reporter) 2016-07-07 21:46 edited on: 2016-07-07 21:48	The weird thing is that I removed the provided libstdc++ as well, and I've been able to run it fine without problems. my libGLU.so.1 points to libGLU.so.1.3.1, which is provided by gentoo's media-libs/glu-9.0.0-r1. My currently active gcc is gcc-5.4.0, which was probably what I used to compile that. Edit: I believe I also ran this without deleting the provided libstdc++ at first as well. (I definitely ran the 64-bit testing version without ever deleting the library.)

(0035579) Khym Chanur (reporter) 2016-07-08 08:32	Oops, wait, Dwarf_Fortress still needs the libgraphics.so library which is in the same directory. So, to amend my suggestion, libstdc++.so.6 and libgcc_s.so.1 could be moved to the new directory libs/c_libs, and if the df script decides they're needed it would set LD_LIBRARY_PATH to "./c_libs".

(0035613) Khym Chanur (reporter) 2016-07-12 18:05	Here's the start of a fix for the problem: http://pastebin.com/jX4Wf062 [^] It will detect when the system libstdc++ can be linked or not. If it can't be, then it links against the bundled version which is put into libs/c_lib. It needs to be updated with all the versions of libstdc++ which can be linked against.

Issue History
Date Modified	Username	Field	Change
2016-07-07 09:45	Khym Chanur	New Issue
2016-07-07 13:08	ShimmerFairy	Note Added: 0035570
2016-07-07 16:23	lethosor	Note Added: 0035571
2016-07-07 16:23	lethosor	Assigned To	=> lethosor
2016-07-07 16:23	lethosor	Status	new => acknowledged
2016-07-07 16:25	lethosor	Relationship added	related to 0009894
2016-07-07 21:29	Khym Chanur	Note Added: 0035576
2016-07-07 21:46	ShimmerFairy	Note Added: 0035577
2016-07-07 21:48	ShimmerFairy	Note Edited: 0035577	View Revisions
2016-07-08 08:32	Khym Chanur	Note Added: 0035579
2016-07-12 18:05	Khym Chanur	Note Added: 0035613
2020-10-12 15:39	lethosor	Relationship added	has duplicate 0011635
2021-01-31 21:47	lethosor	Relationship added	has duplicate 0011681
2022-07-29 19:54	lethosor	Relationship added	has duplicate 0011895