sci-libs/dmlc-core: add 0.5

- add cpu_flags_x86_sse2 to IUSE

It's true it only adds an -m flag to CXXFLAGS but so do most uses of
CPU_FLAGS_X86.  Also, remove automagic from CMakeLists.txt and pass
-DSUPPORT_MSSE2 explicitly

- remove patch

Appears to be no longer needed.

- fix dependencies

Make gtest a proper bdep.  The presence of texlive-fontutils appears
irrelevant as the generated docs compare the same.  curl is only
needed for s3.

- fix testing

Portage doesn't set LD_LIBRARY_PATH resulting in a leading colon when
used in LD_LIBRARY_PATH="${LD_LIBRARY_PATH}:${BUILD_DIR}". It builds
fine with just -L\"${BUILD_DIR}\" and testing runs fine with just
LD_LIBRARY_PATH="${BUILD_DIR}".

It doesn't appear to need tc-export CXX to find the correct
compiler.

GTEST_LIB needs to be changed to the correct libdir. Otherwise it
passes -L/lib/ triggering it to build in x86 mode and fail at linking
stage. Alter GTEST_INC also for good measure.

Pass -DGOOGLE_TEST for ctest testing, while also keeping non-ctest
tests.

Pass USE_CXX14_IF_AVAILABLE to cmake and change -std=c++11 to
-std=c++14 in the Makefile to support the latest gtest.

- use emake to build docs and tests in src_compile

`emake test` is more appropriate in src_compile.  And `emake doxygen`
works fine to generate docs.

- add little-endian tests

Pass DMLC_UNIT_TEST_LITTLE_ENDIAN for a few more tests.

Closes: https://bugs.gentoo.org/894038
Closes: https://github.com/gentoo/gentoo/pull/29572
Signed-off-by: Peter Levine <plevine457@gmail.com>
Signed-off-by: Andrew Ammerlaan <andrewammerlaan@gentoo.org>

2 files changed, 106 insertions, 0 deletions

diff --git a/sci-libs/dmlc-core/Manifest b/sci-libs/dmlc-core/Manifest
index de2f9fd304d6..6eff176be348 100644
--- a/sci-libs/dmlc-core/Manifest
+++ b/sci-libs/dmlc-core/Manifest
@@ -1 +1,2 @@
+DIST dmlc-core-0.5.tar.gz 256340 BLAKE2B 1a2fd548c704e89adbba397b9f4306ad9439b969755bfd4fa24aad2e58855882dbe69b9c0550b830f8a81dfa41139e22c7ceed0ed707608e31fea1868b707ad4 SHA512 e8292bf71f9d7e31f17add69c984473f8f4d51768c5ac1451dceb9ff3c3e607dd85eea7fb3999f00cf34e962c5956ef1426713b7d8baa5fdbc3aa88e58bed66d
 DIST dmlc-core-0_p20170719.tar.gz 160242 BLAKE2B 2752968c831b5468cb926fbd2783098d1d66f5dd7f06b1abf138e165c637a3c16d477b04b709a05826528ee8e35ed61b563bdaae958fb91c78591dd57761a5f4 SHA512 2e2d79800839652772f07deb5ea3aa470cc5a18d2d0e480b8f4a1598aca72443546a438f3309708268cc49cf2d65684c3366cfc6c33c085baf1b804b4c04f02e
diff --git a/sci-libs/dmlc-core/dmlc-core-0.5.ebuild b/sci-libs/dmlc-core/dmlc-core-0.5.ebuild
new file mode 100644
index 000000000000..ae6cb41b64e6
--- /dev/null
+++ b/sci-libs/dmlc-core/dmlc-core-0.5.ebuild
@@ -0,0 +1,105 @@
+# Copyright 1999-2023 Gentoo Authors
+# Distributed under the terms of the GNU General Public License v2
+
+EAPI=8
+
+inherit cmake toolchain-funcs
+
+DESCRIPTION="Common bricks library for building distributed machine learning"
+HOMEPAGE="https://github.com/dmlc/dmlc-core"
+
+if [[ ${PV} == *9999* ]] ; then
+	EGIT_REPO_URI="https://github.com/dmlc/${PN}.git"
+	inherit git-r3
+else
+	SRC_URI="https://github.com/dmlc/${PN}/archive/refs/tags/v${PV}.tar.gz
+		-> ${P}.tar.gz"
+
+	KEYWORDS="~amd64 ~x86 ~amd64-linux ~x86-linux"
+fi
+
+LICENSE="Apache-2.0"
+SLOT="0"
+
+# hdfs needs big java hdfs not yet in portage
+# azure not yet in portage
+IUSE="cpu_flags_x86_sse2 doc openmp s3 test"
+RESTRICT="!test? ( test )"
+
+RDEPEND="s3? ( net-misc/curl[ssl] )"
+DEPEND="${RDEPEND}"
+BDEPEND="doc? ( app-doc/doxygen[dot] )
+	test? ( dev-cpp/gtest )"
+
+pkg_pretend() {
+	[[ ${MERGE_TYPE} != binary ]] && use openmp && tc-check-openmp
+}
+
+pkg_setup() {
+	[[ ${MERGE_TYPE} != binary ]] && use openmp && tc-check-openmp
+}
+
+src_prepare() {
+	cmake_src_prepare
+
+	sed -e '/-O3/d' -e '/check_cxx_compiler_flag("-msse2"/d' \
+		-e '/check_cxx.*SSE2/d' \
+		-i CMakeLists.txt || die
+
+	# All these hacks below to allow testing
+	sed -e 's|-O3||' -e 's|-std=c++11|-std=c++14|' \
+		-e "s|-lm|-lm -L\"${BUILD_DIR}\" -ldmlc|g" \
+		-i Makefile || die
+	sed -e "s|libdmlc.a||g" \
+		-e "/^GTEST_LIB=/s|=.*|=/usr/$(get_libdir)|" \
+		-e "/^GTEST_INC=/s|=.*|=/usr/include|" \
+		-i test/dmlc_test.mk test/unittest/dmlc_unittest.mk || die
+	# Don't ever download gtest
+	sed -e 's/^if (NOT GTEST_FOUND)$/if (FALSE)/' \
+		-i test/unittest/CMakeLists.txt || die
+	cat <<-EOF > config.mk
+		USE_SSE=$(usex cpu_flags_x86_sse2 1 0)
+		WITH_FPIC=1
+		USE_OPENMP=$(usex openmp 1 0)
+		USE_S3=$(usex s3 1 0)
+		BUILD_TEST=$(usex test 1 0)
+		DMLC_CFLAGS=${CXXFLAGS}
+		DMLC_LDFLAGS=${LDFLAGS}
+	EOF
+}
+
+src_configure() {
+	local mycmakeargs=(
+		-DGOOGLE_TEST=$(usex test)
+		-DSUPPORT_MSSE2=$(usex cpu_flags_x86_sse2)
+		-DUSE_CXX14_IF_AVAILABLE=YES # Newer gtest needs C++14 or later
+		-DUSE_S3=$(usex s3)
+		-DUSE_OPENMP=$(usex openmp)
+	)
+
+	cmake_src_configure
+}
+
+src_compile() {
+	cmake_src_compile
+
+	use doc && emake doxygen
+	use test && emake test
+}
+
+src_test() {
+	DMLC_UNIT_TEST_LITTLE_ENDIAN=$([[ $(tc-endian) == little ]] && echo 1 || echo 0) \
+	LD_LIBRARY_PATH="${BUILD_DIR}" \
+		test/unittest/dmlc_unittest || die
+
+	cmake_src_test
+}
+
+src_install() {
+	cmake_src_install
+
+	if use doc; then
+		dodoc -r doc/doxygen/html
+		docompress -x /usr/share/doc/${PF}/html
+	fi
+}