Why ldconfig doesn't link or cache my library?

user_3815766 0
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I'm on Ubuntu 18.04, GCC 7.4

I created a test shared-library then copy it to /usr/local/lib/ The .so file has been created like this:

gcc -Wall -fPIC -c src/Test.cpp -o obj/Test.o
gcc -shared -Wl,-soname,libhztest.so -o bin/libhztest.so obj/*.o
sudo cp bin/libhztest.so /usr/local/lib/hazeltest/
sudo chmod 777 /usr/local/lib/hazeltest/

Then I created a test app and tried to run it and I get : error while loading shared libraries: libhztest.so: cannot open shared object file: No such file or directory

If I do export a proper LD_LIBRARY_PATH and it works but I prefer to use ldconfig

Unfortunately ldconfig doesn't seem to link my library even though the directory /usr/local/lib/ is well included in the /etc/ld.so.conf

Anyone could tell me why this doesn't work? Thanks

ubuntu-18.04 shared-libraries linker gcc
2 Answers

I finally get it running the command :

sudo ldconfig /usr/local/lib/hazeltest/
user_38157660

You need to copy it into /usr/local/lib/, not /usr/local/lib/hazeltest/. Either that, or add /usr/local/lib/hazeltest/ to /etc/ld.so.conf. (Although I think you're supposed to add this in a new file in /etc/ld.so.conf.d/ instead, like /etc/ld.so.conf.d/hazeltest.conf, so that you don't modify ld.so.conf directly which might be an auto-generated file).

user_8561990
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