Merge pull request #15 from petrov-adg/video-libdouble-conversion

libdouble-conversion: move package here from packages-abandoned feed
It's a dependency for qt5base which got removed from the packages feed earlier due to no other package from the packages feed made us of it.

libs/libdouble-conversion/Makefile

@@ -0,0 +1,60 @@
+#
+# Copyright (C) 2008-2016 OpenWrt.org
+#
+# This is free software, licensed under the GNU General Public License v2.
+# See /LICENSE for more information.
+#
+
+include $(TOPDIR)/rules.mk
+
+PKG_NAME:=libdouble-conversion
+PKG_VERSION:=3.1.5
+PKG_RELEASE:=3
+
+PKG_SOURCE:=double-conversion-$(PKG_VERSION).tar.gz
+PKG_SOURCE_URL:=https://codeload.github.com/google/double-conversion/tar.gz/v$(PKG_VERSION)?
+PKG_HASH:=a63ecb93182134ba4293fd5f22d6e08ca417caafa244afaa751cbfddf6415b13
+
+HOST_BUILD_DIR:=$(BUILD_DIR_HOST)/double-conversion-$(PKG_VERSION)
+PKG_BUILD_DIR:=$(BUILD_DIR)/double-conversion-$(PKG_VERSION)
+
+PKG_MAINTAINER:=Yaroslav Petrov <[email protected]>
+PKG_LICENSE:=BSD-3c
+PKG_LICENSE_FILES:=COPYING LICENSE
+
+CMAKE_INSTALL:=1
+
+include $(INCLUDE_DIR)/package.mk
+include $(INCLUDE_DIR)/host-build.mk
+include $(INCLUDE_DIR)/cmake.mk
+
+define Package/libdouble-conversion
+  SECTION:=libs
+  CATEGORY:=Libraries
+  TITLE:=Efficient binary-decimal and decimal-binary conversion routines for IEEE doubles
+  URL:=https://github.com/google/double-conversion
+  DEPENDS:=+libstdcpp
+endef
+
+define Package/libdouble-conversion/description
+  double-conversion provides binary-decimal and decimal-binary routines for IEEE doubles.
+
+  The library consists of efficient conversion routines that have been extracted
+  from the V8 JavaScript engine. The code has been refactored and improved so that
+  it can be used more easily in other projects.
+endef
+
+CMAKE_OPTIONS += \
+	-DBUILD_SHARED_LIBS=ON \
+	-DBUILD_TESTING=OFF
+
+TARGET_CXXFLAGS += -ffunction-sections -fdata-sections -fno-rtti -flto
+TARGET_LDFLAGS += -Wl,--gc-sections
+
+define Package/libdouble-conversion/install
+	$(INSTALL_DIR) $(1)/usr/lib
+	$(CP) $(PKG_INSTALL_DIR)/usr/lib/lib*.so* $(1)/usr/lib/
+endef
+
+$(eval $(call BuildPackage,libdouble-conversion))
+$(eval $(call HostBuild))