Distribute the CMake configuration file.

[trivialfis]

Solution to issue cannot be found in the documentation.

• I checked the documentation.

Issue

The C header is distributed along with libxgboost, but not the CMake exported configuration files. The feedstock might be able to distribute CMake files as well as done by make install target. The downstream users should be able to call:

find_package(xgboost)

Installed packages

NA

Environment info

NA

[jakirkham]

Thanks Jiaming! 🙏

Agree we should do this

Likely we are missing some lines here. Do you know what we need to add?

xgboost-feedstock/recipe/install-libxgboost.sh

Lines 29 to 32 in 3fe446a

	mkdir -p ${LIBDIR} ${INCDIR}/xgboost ${BINDIR} || true
	cp ${SRC_DIR}/lib/${XGBOOSTDSO} ${SODIR}/
	cp -Rf ${SRC_DIR}/include/xgboost ${INCDIR}/
	cp -f ${SRC_DIR}/src/c_api/*.h ${INCDIR}/xgboost/

[hcho3]

I wonder why we don't just use make install or equivalent? That should install the headers as well as the CMake config files.

[jakirkham]

Agree that would be preferable

Think this has to do with how Windows is setup

Maybe there is a good way to accomplish this just with CMake?

xgboost-feedstock/recipe/install-libxgboost.sh

Lines 3 to 7 in 3fe446a

	if [[ ${OSTYPE} == msys ]]; then
	# Just for now; should we handle slash fixing in conda-build?
	PREFIX=${PREFIX//\\//}
	SRC_DIR=${SRC_DIR//\\//}
	fi

xgboost-feedstock/recipe/install-libxgboost.sh

Lines 9 to 12 in 3fe446a

	if [[ ${OSTYPE} == msys ]]; then
	LIBDIR=${PREFIX}/Library/mingw-w64/lib
	INCDIR=${PREFIX}/Library/mingw-w64/include
	BINDIR=${PREFIX}/Library/mingw-w64/bin

[trivialfis]

Maybe CMAKE_INSTALL_PREFIX can help?

[jakirkham]

Agree that sounds like a reasonable approach

Would you like to give it a try? 🙂

[trivialfis]

It will probably take some time before I can get to it.