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nagmat84
Guru
Joined: 27 Mar 2007
Posts: 308
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 Posted: Wed Apr 23, 2025 6:39 am Post subject: How to set SRC dir S for eclass cmake with /src subdirectory |
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Assume you have a project whose main CMakeLists.txt does not reside in the project's main directory but in a subdirectory /src. I want to use the eclass cmake and I am wondering wether- it is better to set the ebuild variable S to the sub-directory, or
- change the working dir to /src in src_compile?
Option 1 essentially looks like: | Code: | EAPI=8
inherit cmake
S="${WORKDIR}/release-${PV}-stable/src" |
Option 2 looks like: | Code: | EAPI=8
inherit cmake
S="${WORKDIR}/release-${PV}-stable"
src_compile() {
cd src || die
cmake_src_compile
} |
The basic structure of the project is: | Code: | release-x.y.z-stable
|-- doc
|-- lib
| `-- CMakeLists.txt
|-- src
| `-- CMakeLists.txt
|-- test
|-- tools
|-- BUILDING.md
|-- CHANGELOG.md
`-- README.md |
Things worth noting:- Option 1 is more succint, less boiler plate code.
- There are files above the /src subdirectory level inside /lib and /doc which needs to be installed, too. I don't know wether confining ${S} to /src might prevent this in a later emerge stage. I haven't come so far yet.
- With option 1, emerge creates the build directory "${WORKDIR}/release-${PV}-stable/src_build", i.e. the build directory resides within the extracted project next to ./src. With option 2, emerge creates the build directory "${WORKDIR}/release-${PV}-stable_build" outside the extracted project. The latter option feels as if this would be the correct way.
- With option 2, I change the working dir at the beginning of the compilation phase, before I call the default implementation of the eclass. I don't know where I also have to change the working dir in order to not accidentally break thing. Or stated differently: I don't know how many things inside the eclass rely on ${S} pointing to the directory with the main CMakeLists.txt.
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grknight
Retired Dev
Joined: 20 Feb 2015
Posts: 2141
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| Posted: Wed Apr 23, 2025 12:27 pm Post subject: |
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If you don't care about any other CMakeLists.txt except in src directory as the base, then use Option 3:
| Code: | EAPI=8
CMAKE_USE_DIR="${S}/src"
inherit cmake |
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