To pass lists into cmake, you usually need ';' as item separator.
(Exception: CMAKE_<lang>_FLAGS which is a command line fragment with
space-separated items.)
In vcpkg, webp is configured via a CMAKE_PROJECT_INCLUDE file:
if(GDAL_USE_WEBP)
find_package(WebP CONFIG REQUIRED)
add_library(WEBP::WebP ALIAS WebP::webp)
set(GDAL_CHECK_PACKAGE_WebP_NAMES WebP CACHE INTERNAL "vcpkg")
set(GDAL_CHECK_PACKAGE_WebP_TARGETS WebP::webp CACHE INTERNAL "vcpkg")
endif()
Kai
Am 14.02.24 um 01:13 schrieb Carl Godkin via gdal-dev:
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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