I have a compiled project bin/MyProgram that’s directed to bin/libs/ to load libraries with this in my config.make: PROJECT_LDFLAGS= -Wl,-rpath=./libs. I can tell it’s working for all except one, libraw.so.20:

$ ldd MyProgram

        libcurl.so.4 => ./libs/libcurl.so.4 (0x0000007f8ff30000)
        libglfw.so.3 => ./libs/libglfw.so.3 (0x0000007f8fea0000)
        libGLEW.so.2.2 => ./libs/libGLEW.so.2.2 (0x0000007f8fdc0000)
        libGL.so.1 => ./libs/libGL.so.1 (0x0000007f8fcc0000)
... clipped for brevity
        libjxrglue.so.0 => /lib/aarch64-linux-gnu/libjxrglue.so.0 (0x0000007f8e010000)
        libjpeg.so.62 => /lib/aarch64-linux-gnu/libjpeg.so.62 (0x0000007f8df90000)
        libopenjp2.so.7 => /lib/aarch64-linux-gnu/libopenjp2.so.7 (0x0000007f8df10000)
        libraw.so.20 => not found
        libtiff.so.6 => /lib/aarch64-linux-gnu/libtiff.so.6 (0x0000007f8de70000)
        libwebpmux.so.3 => /lib/aarch64-linux-gnu/libwebpmux.so.3 (0x0000007f8de40000)
        libwebp.so.7 => /lib/aarch64-linux-gnu/libwebp.so.7 (0x0000007f8ddc0000)
... clipped for brevity
 

You can see that libcurl and others are found in ./libs, other libraries are found system-wide, but libraw is not found even though it does exist in ./libs. Why is my program not able to use libraw.so.20 specifically from my local ./libs directory?

My program does run without issue when export LD_LIBRARY_PATH=$LD_LIBRARY_PATH:/path/to/MyProgram is set prior to running. It also does work when I install libraw system-wide. But I’m curious why libraw won’t run from ./libs.

I also checked its dependencies which seem accounted for:

$ ldd ./libs/libraw.so.20

        linux-vdso.so.1 (0x0000007f9c461000)
        libjpeg.so.62 => /lib/aarch64-linux-gnu/libjpeg.so.62 (0x0000007f9c290000)
        liblcms2.so.2 => /lib/aarch64-linux-gnu/liblcms2.so.2 (0x0000007f9c210000)
        libstdc++.so.6 => /lib/aarch64-linux-gnu/libstdc++.so.6 (0x0000007f9bff0000)
        libm.so.6 => /lib/aarch64-linux-gnu/libm.so.6 (0x0000007f9bf50000)
        libc.so.6 => /lib/aarch64-linux-gnu/libc.so.6 (0x0000007f9bda0000)
        /lib/ld-linux-aarch64.so.1 (0x0000007f9c424000)
        libgcc_s.so.1 => /lib/aarch64-linux-gnu/libgcc_s.so.1 (0x0000007f9bd60000)
        libgomp.so.1 => /lib/aarch64-linux-gnu/libgomp.so.1 (0x0000007f9bcf0000)