VideoIO tests fail to find zlib1.2.9 when loading ImageMagick.jl on Travis

[kmsquire]

It might be that I need to install something else in Travis, but I'm wondering if anyone has any hints here? It worked fine when testing against v0.6.3.

Fatal error:
ERROR: LoadError: LoadError: InitError: error compiling __init__: could not load library "/home/travis/.julia/packages/ImageMagick/W81WA/deps/usr/lib/libMagickWand-6.Q16.so"
/lib/x86_64-linux-gnu/libz.so.1: version `ZLIB_1.2.9' not found (required by /home/travis/.julia/packages/ImageMagick/W81WA/deps/usr/lib/libpng16.so.16)

See: See https://travis-ci.org/kmsquire/VideoIO.jl/jobs/418942394#L1206

[SimonDanisch]

libz.so.1 - that looks a lot like JuliaLang/julia#22828

[kmsquire]

@vtjnash, can you give suggestions on the proper fix here, or point to some docs on the matter? Thanks!

[vtjnash]

@vchuravy IIRC, you were working on changing our zlib version. Can you remind me, what was the end state of that?

[vchuravy]

We removed ZLib as a dependency from Julia/LLVM.

[kmsquire]

@vtjnash, @vchuravy, sorry I bothered you--this seems to be an issue how libpng is being built here.

@SimonDanisch, In the deps directory, you're building zlib v1.2.11, but, the version of libpng installed by ImageMagick was (per the error message) linked with zlib v1.2.9.

I think you need to update https://github.com/SimonDanisch/LibpngBuilder to build with the same version of zlib.

Presumably, then, it will use the version installed in the same directory under ImageMagick (/home/travis/.julia/packages/ImageMagick/W81WA/deps/usr/lib/)

[SimonDanisch]

Hm that's weird, since zlibbuilder has always just offered 1.2.11 as far as I can tell!

[kmsquire]

Could it be that libpngbuilder isn't using the output of zlibbuilder, but is instead using, e.g., a system zlib?

[SimonDanisch]

-- Found ZLIB: /workspace/destdir/lib/libz.so (found version "1.2.11")

that's the output of the configure of libpngbuilder

[SimonDanisch]

well, considering that travis tests run fine for imagemagick, could this be some problem introduced by ffmpeg in VideoIO?

[kmsquire]

-- Found ZLIB: /workspace/destdir/lib/libz.so (found version "1.2.11")
that's the output of the configure of libpngbuilder

Interesting. If run ldd on https://github.com/SimonDanisch/LibpngBuilder/releases/download/1.0.0/libpng.v1.6.31.i686-linux-gnu.tar.gz, I get the same error as in VideoIO.jl's logs:

# ldd libpng16.so.16.31.0
./libpng16.so.16.31.0: /usr/lib32/libz.so.1: version `ZLIB_1.2.9' not found (required by ./libpng16.so.16.31.0)
	linux-gate.so.1 (0xf7755000)
	libz.so.1 => /usr/lib32/libz.so.1 (0xf76f1000)
	libm.so.6 => /lib32/libm.so.6 (0xf769c000)
	libc.so.6 => /lib32/libc.so.6 (0xf74e5000)
	/lib/ld-linux.so.2 (0xf7756000)

[kmsquire]

And if I make https://github.com/bicycle1885/ZlibBuilder/releases/download/v1.0.2/Zlib.v1.2.11.i686-linux-gnu.tar.gz available, then the error goes away!

So, the problem is probably that the library search path isn't configured to find zlib in /home/travis/.julia/packages/ImageMagick/W81WA/deps/usr/lib/ when ImageMagick is installed under VideoIO.

[kmsquire]

... any thoughts on how to fix that?

[kmsquire]

(Moving this issue to BinaryBuilder)