i’m using externalproject alot but he downloads and builds the targets everytime i build it. why is this happening?
If you’re using a
Ninja generator, I suggest using
ninja -d explain to see why it thinks it needs to re-download all the time.
no, i’m using linux and makefiles
The equivalent there is
make -d, but it is very verbose.
i use cmake . to config
cmake --build . to build
cmake --install to install and
ctest to run the tests
cmake --build ., use
make directly to get more information about why it is rerunning that command all the time.
If you’re using the URL method and don’t specify a hash, I believe the default behavior is that it’s redownloaded every time. I typically use the external project option
Or for all ExternalProject in that directory scope
set_property(DIRECTORY PROPERTY EP_UPDATE_DISCONNECTED true)
That should stop the constant redownloading on every configure.
I also like external project option
That in general will save significant time of reconfiguring external projects besides just the redownloading.