opj_decompress 2.4.0 built with library 2.3.0.

[John-Nagle]

Downloaded the 2.4.0 version of OpenJPEG from https://github.com/uclouvain/openjpeg/releases/download/v2.4.0/openjpeg-v2.4.0-linux-x86_64.tar.gz
and extracted opj_decompress. Tried

opj_decompress -h

Got

This is the opj_decompress utility from the OpenJPEG project.
It decompresses JPEG 2000 codestreams to various image formats.
It has been compiled against openjp2 library **v2.3.0.**

Was that executable built with the wrong library?

[rouault]

Was that executable built with the wrong library?

no, but you have likely your system libopenjp2 that is used.

Demo on my system:

$ ldd openjpeg-v2.4.0-linux-x86_64/bin/opj_decompress | grep openjp2
libopenjp2.so.7 => /lib/x86_64-linux-gnu/libopenjp2.so.7 (0x00007f6ce0d37000)

$ openjpeg-v2.4.0-linux-x86_64/bin/opj_decompress -h |head -n 4

This is the opj_decompress utility from the OpenJPEG project.
It decompresses JPEG 2000 codestreams to various image formats.
It has been compiled against openjp2 library v2.3.1.

$ LD_LIBRARY_PATH=openjpeg-v2.4.0-linux-x86_64/lib openjpeg-v2.4.0-linux-x86_64/bin/opj_decompress -h |head -n 4

This is the opj_decompress utility from the OpenJPEG project.
It decompresses JPEG 2000 codestreams to various image formats.
It has been compiled against openjp2 library v2.4.0.

The message "has been compiled" is a bit misleading, as it reflects the runtime version, not the build time one

[John-Nagle]

Oh, so it's loading an older .so file. Let me look at that. More later.

[John-Nagle]

OK, please close; that wasn't the problem. Thanks.