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Editorial Team
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Asked: 2026-05-25T01:47:06+00:00

I use the CImg library to write plugins for an image-editing software I created.

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I use the CImg library to write plugins for an image-editing software I created.
The problem is that when I include CImg, size of the plugins explodes from 200kb up to 2Mb!
But in this particular case I only use 5% of CImg code!

So my question is: is there a way to remove unnecessary code at compile time, so the final executable is not bloated?

(I use Qt 4.8.0 and the latest CImg, Qt Creator and MacOS Lion).

Compile/Link flags:
QMAKE_CXXFLAGS += -Os -fdata-sections -ffunction-sections
LIBS += -Wl –gc-sections

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1 Answer

  1. Editorial Team

    Make sure you are compiling with full optimisations (or just -Os which is size optimisation) and stripping debug symbols with strip -s. That can take up a lot of space.

    Also it could be that while you are only using 5% of the CImg code, the 5% you use is using the other 95% internally. Pretty much the best you can do is optimise and strip debug symbols.

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