libmatrix_client: Add matrix client library 0.4.1

* Dependency of nheko Matrix client
* Project name is "mtxclient", libraries are libmatrix_client
  not in Gentoo ports, so went with library name.

dev-libs/libmatrix_client/libmatrix_client-0.4.1.recipe

@@ -0,0 +1,68 @@
+SUMMARY="A C++ Matrix Client Library"
+DESCRIPTION="mtxclient is a C++ library implementing the Matrix protocol"
+HOMEPAGE="https://github.com/Nheko-Reborn/mtxclient"
+COPYRIGHT="2018 Konstantinos Sideris"
+LICENSE="MIT"
+REVISION="1"
+SOURCE_URI="https://github.com/Nheko-Reborn/mtxclient/archive/v$portVersion.tar.gz"
+SOURCE_DIR="mtxclient-$portVersion"
+CHECKSUM_SHA256="edd2ac051cf8019579942107fd32ec67dbf3581829954b5cca07e74431b9770a"
+
+ARCHITECTURES="!x86_gcc2 x86 x86_64"
+SECONDARY_ARCHITECTURES="x86"
+
+libVersion="$portVersion"
+libVersionCompat="$libVersion compat >= ${libVersion%%.*}"
+
+PROVIDES="
+	libmatrix_client$secondaryArchSuffix = $portVersion
+	lib:libmatrix_client$secondaryArchSuffix = $libVersionCompat
+	"
+REQUIRES="
+	haiku$secondaryArchSuffix
+	boost170$secondaryArchSuffix
+	nlohmann_json
+	lib:libssl$secondaryArchSuffix
+	lib:libolm$secondaryArchSuffix 
+	"
+
+PROVIDES_devel="
+	libmatrix_client${secondaryArchSuffix}_devel = $portVersion
+	devel:libmatrix_client$secondaryArchSuffix = $libVersionCompat
+	"
+REQUIRES_devel="
+	libmatrix_client$secondaryArchSuffix == $portVersion base
+	"
+
+BUILD_REQUIRES="
+	haiku${secondaryArchSuffix}_devel
+	boost170_devel$secondaryArchSuffix
+	nlohmann_json
+	devel:libssl$secondaryArchSuffix
+	devel:libolm$secondaryArchSuffix
+	"
+BUILD_PREREQUIRES="
+	cmd:gcc$secondaryArchSuffix
+	cmd:ld$secondaryArchSuffix
+	cmd:make
+	cmd:cmake
+	cmd:pkg_config$secondaryArchSuffix
+	"
+
+BUILD()
+{
+	cmake $cmakeDirArgs -S. -DBUILD_LIB_TESTS=OFF -DBUILD_LIB_EXAMPLES=OFF
+	make $jobArgs
+}
+
+INSTALL()
+{
+	make install
+
+	prepareInstalledDevelLib libmatrix_client
+	fixPkgconfig
+
+	# devel package
+	packageEntries devel \
+		"$developDir"
+}