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bug#70972: Test 170 fails


From: Ileana Dumitrescu
Subject: bug#70972: Test 170 fails
Date: Sat, 8 Jun 2024 12:08:32 +0300
User-agent: Mozilla Thunderbird

On 16/05/2024 04:09, Sam James wrote:
When testing libtool-2.5.0, I got one test failure in test 170
(bug_62343.at for -no-canonical-prefixes):

#                             -*- compilation -*-
170. bug_62343.at:26: testing Use -no-canonical-prefixes flag ...
./bug_62343.at:28: $LIBTOOL --config | $EGREP '^build_libtool_libs=no' && (exit 
77)
./bug_62343.at:36: $LIBTOOL --mode=compile --tag=CXX g++ -c x.cpp
stderr:
stdout:
libtool: compile:  g++ -c x.cpp  -fPIC -DPIC -o .libs/x.o
libtool: compile:  g++ -c x.cpp -o x.o
./bug_62343.at:38: $LIBTOOL --mode=link --tag=CXX g++ -o libx.la 
-no-canonical-prefixes -rpath /usr/lib64/ x.lo
stderr:
g++: fatal error: '-fuse-linker-plugin', but liblto_plugin.so not found
compilation terminated.
stdout:
libtool: link: g++  -fPIC -DPIC -shared -nostdlib 
/usr/lib/gcc/x86_64-pc-linux-gnu/15/../../../../lib64/crti.o 
/usr/lib/gcc/x86_64-pc-linux-gnu/15/crtbeginS.o  .libs/x.o   
-L/usr/lib/gcc/x86_64-pc-linux-gnu/15 
-L/usr/lib/gcc/x86_64-pc-linux-gnu/15/../../../../lib64 -L/lib/../lib64 
-L/usr/lib/../lib64 
-L/usr/lib/gcc/x86_64-pc-linux-gnu/15/../../../../x86_64-pc-linux-gnu/lib 
-L/usr/lib/gcc/x86_64-pc-linux-gnu/15/../../.. -lstdc++ -lm -lc -lgcc_s 
/usr/lib/gcc/x86_64-pc-linux-gnu/15/crtendS.o 
/usr/lib/gcc/x86_64-pc-linux-gnu/15/../../../../lib64/crtn.o  
-no-canonical-prefixes   -Wl,-soname -Wl,libx.so.0 -o .libs/libx.so.0.0.0
./bug_62343.at:38: exit code was 1, expected 0
170. bug_62343.at:26: 170. Use -no-canonical-prefixes flag (bug_62343.at:26): 
FAILED (bug_62343.at:38)

Any idea how to further probe what's going on? I'm not sure why it's
even trying to use a linker plugin.

If I run manually, I do get the same error at least:

$ g++ -o libx.la -no-canonical-prefixes x.lo
g++: fatal error: ‘-fuse-linker-plugin’, but liblto_plugin.so not found
compilation terminated.

I'm also confused as I *do* have the plugin at
/usr/libexec/gcc/x86_64-pc-linux-gnu/15/liblto_plugin.so and it works
normally in other cases.

If I drop -no-canonical-prefixes, it works fine. (Caveat: I've not
looked up what the flag actually does.)

thanks,
sam


Test 170 has been fixed for several OSes on the development branch. I
have not been able to reproduce your error, but I wonder if the current
fix would apply to your set up as well. Could you test the fix? You
could also wait until the next beta release and see if that fixes it.

--
Ileana Dumitrescu

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