Our Mac instances must use the Apple-provided compiler I suppose. We
also have a Linux CI config using a recent clang (from Fedora:rawhide,
so cutting edge)
OpenMP detection is done through the CMake provided FindOpenMP module:
https://cmake.org/cmake/help/latest/module/FindOpenMP.html
But I would expect your compiler to support it although it is not
cutting edge.
You can explicitly disable it by setting -DGDAL_USE_OPENMP=OFF
Le 05/01/2026 à 18:41, Andrew Bell a écrit :
Hi,
It looks like CI is way ahead of my config. Are you using an
Apple-provided compiler or one from clang or elsewhere?
[sd-integration] (gdal) $ clang++ --version
Apple clang version 14.0.3 (clang-1403.0.22.14.1)
Target: x86_64-apple-darwin22.5.0
Thread model: posix
InstalledDir:
/Applications/Xcode.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/bin
On Mon, Jan 5, 2026 at 12:32 PM Even Rouault
<[email protected]> wrote:
Hi Andrew,
openmp is enabled when available since
https://github.com/OSGeo/gdal/commit/2a3f06b90f2d68da446451a44090aa38fd6f4b5a#diff-c6d7b93ff4bf010c2c6218c9329af9afb9a00aab7871175046a9b50f26826452R435
. What is your clang version ? That warning are not shown on our
clang based CI configurations up to now.
Even
Le 05/01/2026 à 18:25, Andrew Bell via gdal-dev a écrit :
Hi,
I updated to the latest master and am now seeing the following
warning during compilation:
[156/1486] Building CXX object
alg/CMakeFiles/alg.dir/thinplatespline.cpp.o
clang: warning: argument unused during compilation: '-Xclang
-fopenmp' [-Wunused-command-line-argument]
If anyone has some info on this, please let me know.
--
Andrew Bell
[email protected]
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--
Andrew Bell
[email protected]
--
http://www.spatialys.com
My software is free, but my time generally not.
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