Hi Andrew, Thanks for replying. I am not looking for ways to edit CMakeLists.txt files, especially since I don't really understand the syntax.
I was just hoping that someone who had built GDAL with WEBP enabled would tell me how to specify both libraries to cmake on the command line. Sorry I over-complicated my question! carl On Tue, Feb 13, 2024 at 10:45 AM Andrew C Aitchison <and...@aitchison.me.uk> wrote: > On Tue, 13 Feb 2024, Carl Godkin via gdal-dev wrote: > > > Hi, > > > > Sorry if this is an elementary cmake question but I am curious if there > is > > a cleaner solution than I came up with. > > > > I'm trying to build GDAL 3.8.3 with WEBP support. > > > > I built libwebp 1.3.2 (the latest) without any problems, also using > cmake. > > > > However, when building GDAL, the link on the shared library fails since > > WEBP seems to require TWO libraries (in the libwebp package), libwebp and > > libsharpyuv. > > > > My question is how can I persuade cmake to accept both libraries for > > WEBP_LIBRARY? > > > > I thought quotes would help. What I think I ought to be able to do is > > something like > > > > -DWEBP_LIBRARY="/usr/local/devlibs/libwebp-1.3.2/lib64/libwebp.a > > /usr/local/devlibs/libwebp-1.3.2/lib64/libsharpyuv.a" \ > > > > or else > > > > "-DWEBP_LIBRARY=/usr/local/devlibs/libwebp-1.3.2/lib64/libwebp.a > > /usr/local/devlibs/libwebp-1.3.2/lib64/libsharpyuv.a" \ > > > > but both options produce link lines that include the double quotes! This > > is an issue on Windows and Linux for me. > > CMAKE is rather more verbose than that. > > Compare > gdal/frmts/webp/CMakeLists.txt > with > gdal/frmts/png/CMakeLists.txt > for how the png driver uses libpng and zlib > > You probably don't need the gdal_add_vendored_lib commands or the > GDAL_USE_..._INTERNAL tests, since gdal is not bundling libwebp. > > > I have a couple of workarounds that I won't bore you with, but I was > > wondering what the best practice is here (other than hand-editing the > cmake > > output of course). > > > > I think that libwebp added the "sharpyuv" stuff at version 1.3.0 so > perhaps > > using an older version would also work, but that doesn't seem > sustainable. > > > > Thanks for suggestions, > > > > carl > > > > -- > Andrew C. Aitchison Kendal, UK > and...@aitchison.me.uk >
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