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Groups > linux.debian.bugs.dist > #972930

Bug#939155: libgnustep-gui0.27: Uses GifQuantizeBuffer - binary stops working with newer giflib

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Source: libgnustep-gui0.27
Version: 0.27.0-5
Severity: important

Hello,

this package uses GifQuantizeBuffer() from giflib. The symbol has been
dropped in giflib 5.2 (libgif-dev/libgif7 5.2.1 is available in
experimental) and therefore the package 
a) stops working when the gif library package is upgraded and
b) if built against libgif-dev >= 5.2 then GIF support is
disabled/limited.

I do not think giflib did the right thing by dropping the symbol without
a soname bump but that is beside the point.[1] Even with the correct way
(giflib soname bump) this package loses gif support. I am quite confident
that GifQuantizeBuffer() will not be reintroduced - It was ripped out to
"reduce libgif size and attack surface".

I am reporting this /now/ with severity important, but please treat it
as rc issue.

cu Andreas

[1] I have suggested to upstream to do a soname bump. If this is not
accepted we will probably end up with newer libgif7 having a Breaks for
GifQuantizeBuffer()-using-software.

------------------------
checking for QuantizeBuffer... no
checking for GifQuantizeBuffer... no

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Bug#939155: libgnustep-gui0.27: Uses GifQuantizeBuffer - binary stops working with newer giflib Andreas Metzler <ametzler@bebt.de> - 2019-09-01 18:50 +0200

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