Errors when changing cmake build directory

Michael Dickens michaelld at
Thu May 2 16:48:58 UTC 2019

Why not leave the build directory alone & let the cmake 1.1 PG handle it? Most CMake-based ports can handle out-of-source building these days, and that's the default for the cmake 1.1 PG, and the default setting here should work for the vast majority of cmake-based ports.

To your query: You shouldn't try to write to or generate files outside the ${worksrcdir} (or ${worksrcpath}); all configuring, building, installing, patching, etc must be done within the port's build path.

Hope this is useful! - MLD

On Thu, May 2, 2019, at 12:40 PM, Ao Liu wrote:
> Hi all macports fans,
> I'm recently learning to do some small modifications and enhancements on an existing portfile. One way I found that would solve my problem was to modify the build dir of cmake. (The PortGroup == cmake 1.1). 
> I tried to set cmake.build_dir to ${prefix}/share/abc/abc${abc.version}/
> But it always throws an error and I believe it was because cmake can not write to the above directory. I tried to chown the directory to macports, still doesn't work. 
> Any guidance on how to customize the CMake build directory? Thanks folks!
> :info:configure CMake Error at /opt/local/share/cmake-3.14/Modules/CMakeDetermineSystem.cmake:173 (file):

> :info:configure file failed to open for writing (No such file or directory):

> :info:configure /opt/local/share/abc/abc4.10.5/CMakeFiles/CMakeOutput.log

> ...

> ...

> ...(similar CMake errors)

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