[arch-dev-public] RFC: Dropping -DCMAKE_BUILD_TYPE from packages using cmake

Bartłomiej Piotrowski bpiotrowski at archlinux.org
Sun Mar 11 18:11:13 UTC 2018


On 2018-03-10 11:34, Antonio Rojas via arch-dev-public wrote:
> Hi,
>  Currently most of our packages which use the cmake build system are built with -DCMAKE_BUILD_TYPE=Release. This provides a reasonable (according to upstream) set of C(XX)FLAGS defaults which are appended to and override our default C(XX)FLAGS. So, for instance, our cmake packages are being built with -O3 instead of our default -O2. Besides the inconsistency that this brings to our binaries, IMO it's not a good idea to override our default C(XX)FLAGS unless there's a good reason to. This will also cause issues once we start building debug packages by default (-DCMAKE_BUILD_TYPE=Release also adds DNDEBUG).
>  Therefore I'm proposing to drop -DCMAKE_BUILD_TYPE from all our cmake packages, building them with our default C(XX)FLAGS as all other packages. Comments?
> 

Sounds good. I'm also surprised that it's how it works, honestly. Are
LDFLAGS taken into account regardless of CMAKE_BUILD_TYPE? Will there a
to do list to track the progress?

Bartłomiej


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