Is default `ocp` build static?

[abitrolly]

I am using ocp from Homebrew, It depends on a lot of libraries for installation, like cjson, but ldd shows no dependencies.

$ ldd `which ocp`
    linux-vdso.so.1 (0x00007ffc673f0000)
    libc.so.6 => /lib64/libc.so.6 (0x00007f27aa6a7000)
    /home/linuxbrew/.linuxbrew/lib/ld.so => /lib64/ld-linux-x86-64.so.2 (0x00007f27aa8b9000)

So is the ocp build static by default?

[alexmyczko]

easy to find out by removing the libs. i think the sodtware loads libraries by itself, it has so called modules as shared libs as plugins which are linked dynamically.

[abitrolly]

I don't think it is easy. Removed cjson and SDL from Homebrew and ocp still works. Maybe finds lib in the system, or maybe it should fail when it calls some function.

[alexmyczko]

so you're using brew with linux. what os/release? just to be able to reproduce, will also try to figure out (unless stian sheds some light to the question faster than me)

[abitrolly]

Fedora 40.

[alexmyczko]

I'm on debian, and there I have these files, where one would run ldd against:

/usr/lib/ocp/autoload/35-devpalsa.so
/usr/lib/ocp/autoload/35-devpnone.so
/usr/lib/ocp/autoload/35-devposs.so
/usr/lib/ocp/autoload/35-devpsdl2.so
/usr/lib/ocp/autoload/35-devwmix.so
/usr/lib/ocp/autoload/35-devwmixf.so
/usr/lib/ocp/autoload/35-devwnone.so
/usr/lib/ocp/autoload/95-playay.so
/usr/lib/ocp/autoload/95-playcda.so
/usr/lib/ocp/autoload/95-playflac.so
/usr/lib/ocp/autoload/95-playgmd.so
/usr/lib/ocp/autoload/95-playgme.so
/usr/lib/ocp/autoload/95-playhvl.so
/usr/lib/ocp/autoload/95-playit.so
/usr/lib/ocp/autoload/95-playmp2.so
/usr/lib/ocp/autoload/95-playogg.so
/usr/lib/ocp/autoload/95-playopl.so
/usr/lib/ocp/autoload/95-playsid.so
/usr/lib/ocp/autoload/95-playtimidity.so
/usr/lib/ocp/autoload/95-playwav.so
/usr/lib/ocp/autoload/95-playxm.so
/usr/lib/ocp/autoload/95-playym.so
/usr/lib/ocp/autoload/freverb.so
/usr/lib/ocp/autoload/ireverb.so
/usr/lib/ocp/libocp.so

Basically, rpm packages, are built from srpm, so check the source how it's built.

Usuallt things are linked dynamically, except for stuff like appimage,snap,flatpak

Or you have special purpose/embedded stuff, then some use static linking.

Ah wait so you use brew, let's check the package... that'd be here: https://github.com/Homebrew/homebrew-core/blob/faa03ef71de4f53f92f79dc46e5c9eb59d377bdd/Formula/o/ocp.rb

AFAIK there's no -static there or in upstream. So the answer is definitely no, by default it is not linked statically.

[abitrolly]

From running ldd on all .so files in ocp dir it appears that libs are indeed linked dynamically.

Thanks for the hint.

$ ldd `fd -p '\.so' ../linuxbrew/.linuxbrew/Cellar/ocp` | grep -v '^\.\.' | sort | sed -r 's/\(.+//' | uniq
    /lib64/ld-linux-x86-64.so.2 
    libancient.so.2 => /home/linuxbrew/.linuxbrew/opt/ancient/lib/libancient.so.2 
    libasound.so.2 => /home/linuxbrew/.linuxbrew/opt/alsa-lib/lib/libasound.so.2 
    libbz2.so.1.0 => /home/linuxbrew/.linuxbrew/opt/bzip2/lib/libbz2.so.1.0 
    libcjson.so.1 => /home/linuxbrew/.linuxbrew/opt/cjson/lib/libcjson.so.1 
    libc.so.6 => /lib64/libc.so.6 
    libdiscid.so.0 => /home/linuxbrew/.linuxbrew/opt/libdiscid/lib/libdiscid.so.0 
    libFLAC.so.12 => /home/linuxbrew/.linuxbrew/opt/flac/lib/libFLAC.so.12 
    libfreetype.so.6 => /home/linuxbrew/.linuxbrew/opt/freetype/lib/libfreetype.so.6 
    libgcc_s.so.1 => /home/linuxbrew/.linuxbrew/lib/libgcc_s.so.1 
    libgcc_s.so.1 => /home/linuxbrew/.linuxbrew/opt/gcc/lib/gcc/current/libgcc_s.so.1 
    libgme.so.0 => /home/linuxbrew/.linuxbrew/opt/game-music-emu/lib/libgme.so.0 
    libjpeg.so.8 => /home/linuxbrew/.linuxbrew/opt/jpeg-turbo/lib/libjpeg.so.8 
    libmad.so.0 => /home/linuxbrew/.linuxbrew/opt/mad/lib/libmad.so.0 
    libm.so.6 => /lib64/libm.so.6 
    libncursesw.so.6 => /home/linuxbrew/.linuxbrew/opt/ncurses/lib/libncursesw.so.6 
    libogg.so.0 => /home/linuxbrew/.linuxbrew/opt/libogg/lib/libogg.so.0 
    libpng16.so.16 => /home/linuxbrew/.linuxbrew/opt/libpng/lib/libpng16.so.16 
    libSDL2-2.0.so.0 => /home/linuxbrew/.linuxbrew/opt/sdl2/lib/libSDL2-2.0.so.0 
    libstdc++.so.6 => /home/linuxbrew/.linuxbrew/lib/libstdc++.so.6 
    libstdc++.so.6 => /home/linuxbrew/.linuxbrew/opt/gcc/lib/gcc/current/libstdc++.so.6 
    libvorbisfile.so.3 => /home/linuxbrew/.linuxbrew/opt/libvorbis/lib/libvorbisfile.so.3 
    libvorbis.so.0 => /home/linuxbrew/.linuxbrew/Cellar/libvorbis/1.3.7/lib/libvorbis.so.0 
    libX11.so.6 => /home/linuxbrew/.linuxbrew/opt/libx11/lib/libX11.so.6 
    libXau.so.6 => /home/linuxbrew/.linuxbrew/opt/libxau/lib/libXau.so.6 
    libxcb.so.1 => /home/linuxbrew/.linuxbrew/opt/libxcb/lib/libxcb.so.1 
    libXcursor.so.1 => /home/linuxbrew/.linuxbrew/opt/libxcursor/lib/libXcursor.so.1 
    libXdmcp.so.6 => /home/linuxbrew/.linuxbrew/opt/libxdmcp/lib/libXdmcp.so.6 
    libXext.so.6 => /home/linuxbrew/.linuxbrew/opt/libxext/lib/libXext.so.6 
    libXfixes.so.3 => /home/linuxbrew/.linuxbrew/opt/libxfixes/lib/libXfixes.so.3 
    libXi.so.6 => /home/linuxbrew/.linuxbrew/opt/libxi/lib/libXi.so.6 
    libXrandr.so.2 => /home/linuxbrew/.linuxbrew/opt/libxrandr/lib/libXrandr.so.2 
    libXrender.so.1 => /home/linuxbrew/.linuxbrew/opt/libxrender/lib/libXrender.so.1 
    libXss.so.1 => /home/linuxbrew/.linuxbrew/opt/libxscrnsaver/lib/libXss.so.1 
    libz.so.1 => /home/linuxbrew/.linuxbrew/opt/zlib/lib/libz.so.1 
    linux-vdso.so.1