pcre2: import pcre2 from packages feed

pcre2 is needed by newer selinux versions, so it needs to be in the base
repository.

Signed-off-by: Nick Hainke <[email protected]>

package/libs/pcre2/Config.in

@@ -0,0 +1,30 @@
+config PCRE2_JIT_ENABLED
+	bool
+	depends on PACKAGE_libpcre2 && (aarch64 || aarch64_be || arm || i386 || i686 || x86_64 || mips || mipsel || mips64 || mips64el || powerpc || powerpc64 || powerpcle || sparc)
+	default y if (arm || i686 || x86_64)
+	prompt "Enable JIT compiler support"
+	help
+		Enable JIT (Just-In-Time) compiler support.
+
+		Just-in-time compiling is a heavyweight optimization that can greatly
+		speed up pattern matching. However, it comes at the cost of extra
+		processing before the match is performed, so it is of most benefit when
+		the same pattern is going to be matched many times. This does not
+		necessarily mean many calls of a matching function; if the pattern is
+		not anchored, matching attempts may take place many times at various
+		positions in the subject, even for a single call. Therefore, if the
+		subject string is very long, it may still pay to use JIT even for
+		one-off matches. JIT support is available for all of the 8-bit, 16-bit
+		and 32-bit PCRE2 libraries and adds about 100KB to the resulting
+		libpcre2.so. JIT support applies only to the traditional Perl-compatible
+		matching function. It does not apply when the DFA matching function is
+		being used.
+
+		Enabling this option can give an about 10x performance increase on JIT
+		operations. It can be desireable for e.g. high performance Apache
+		mod_rewrite or HA-Proxy reqrep operations.
+
+		However, JIT should _only_ be enabled on architectures that are supported.
+		Enabling JIT on unsupported platforms will result in a compilation
+		failure. A list of supported architectures can be found here:
+		https://pcre.org/current/doc/html/pcre2jit.html#SEC2

package/libs/pcre2/Makefile

@@ -0,0 +1,108 @@
+#
+# Copyright (C) 2017 Shane Peelar
+#
+# This is free software, licensed under the GNU General Public License v2.
+# See /LICENSE for more information.
+#
+
+include $(TOPDIR)/rules.mk
+
+PKG_NAME:=pcre2
+PKG_VERSION:=10.37
+PKG_RELEASE:=2
+
+PKG_SOURCE:=$(PKG_NAME)-$(PKG_VERSION).tar.bz2
+PKG_SOURCE_URL:=@SF/pcre/$(PKG_NAME)/$(PKG_VERSION)
+PKG_HASH:=4d95a96e8b80529893b4562be12648d798b957b1ba1aae39606bbc2ab956d270
+
+PKG_MAINTAINER:=Shane Peelar <[email protected]>
+PKG_LICENSE:=BSD-3-Clause
+PKG_LICENSE_FILES:=LICENCE
+PKG_CPE_ID:=cpe:/a:pcre:pcre
+
+PKG_CONFIG_DEPENDS:=\
+	CONFIG_PACKAGE_libpcre2-16 \
+	CONFIG_PACKAGE_libpcre2-32 \
+	CONFIG_PCRE2_JIT_ENABLED
+
+PKG_BUILD_DEPENDS:=zlib
+
+include $(INCLUDE_DIR)/package.mk
+include $(INCLUDE_DIR)/host-build.mk
+include $(INCLUDE_DIR)/cmake.mk
+
+define Package/libpcre2/default
+  SECTION:=libs
+  CATEGORY:=Libraries
+  URL:=https://www.pcre.org/
+endef
+
+define Package/libpcre2/config
+  source "$(SOURCE)/Config.in"
+endef
+
+define Package/libpcre2
+  $(call Package/libpcre2/default)
+  TITLE:=A Perl Compatible Regular Expression library
+endef
+
+define Package/libpcre2-16
+  $(call Package/libpcre2/default)
+  TITLE:=A Perl Compatible Regular Expression library (16bit support)
+endef
+
+define Package/libpcre2-32
+  $(call Package/libpcre2/default)
+  TITLE:=A Perl Compatible Regular Expression library (32bit support)
+endef
+
+CMAKE_HOST_OPTIONS += \
+	-DBUILD_SHARED_LIBS=OFF \
+	-DPCRE2_BUILD_PCRE2_8=ON \
+	-DPCRE2_BUILD_PCRE2_16=ON \
+	-DPCRE2_BUILD_PCRE2_32=ON \
+	-DPCRE2_DEBUG=OFF \
+	-DPCRE2_DISABLE_PERCENT_ZT=ON \
+	-DPCRE2_SUPPORT_JIT=OFF \
+	-DPCRE2_SHOW_REPORT=OFF \
+	-DPCRE2_BUILD_PCRE2GREP=OFF \
+	-DPCRE2_BUILD_TESTS=OFF
+
+CMAKE_OPTIONS += \
+	-DBUILD_SHARED_LIBS=ON \
+	-DPCRE2_BUILD_PCRE2_8=ON \
+	-DPCRE2_BUILD_PCRE2_16=O$(if $(CONFIG_PACKAGE_libpcre2-16),N,FF) \
+	-DPCRE2_BUILD_PCRE2_32=O$(if $(CONFIG_PACKAGE_libpcre2-32),N,FF) \
+	-DPCRE2_DEBUG=OFF \
+	-DPCRE2_DISABLE_PERCENT_ZT=ON \
+	-DPCRE2_SUPPORT_JIT=O$(if $(CONFIG_PCRE2_JIT_ENABLED),N,FF) \
+	-DPCRE2_SHOW_REPORT=OFF \
+	-DPCRE2_BUILD_PCRE2GREP=OFF \
+	-DPCRE2_BUILD_TESTS=OFF
+
+define Build/InstallDev
+	$(call Build/InstallDev/cmake,$(1))
+	$(SED) 	's,^\(prefix\|exec_prefix\)=.*,\1=$(STAGING_DIR)/usr,g' $(1)/usr/bin/pcre2-config
+	$(INSTALL_DIR) $(2)/bin
+	$(LN) ../../usr/bin/pcre2-config $(2)/bin/pcre2-config
+endef
+
+define Package/libpcre2/install
+	$(INSTALL_DIR) $(1)/usr/lib
+	$(CP) $(PKG_INSTALL_DIR)/usr/lib/libpcre2-{8,posix}.so* $(1)/usr/lib/
+endef
+
+define Package/libpcre2-16/install
+	$(INSTALL_DIR) $(1)/usr/lib
+	$(CP) $(PKG_INSTALL_DIR)/usr/lib/libpcre2-16.so* $(1)/usr/lib/
+endef
+
+define Package/libpcre2-32/install
+	$(INSTALL_DIR) $(1)/usr/lib
+	$(CP) $(PKG_INSTALL_DIR)/usr/lib/libpcre2-32.so* $(1)/usr/lib/
+endef
+
+$(eval $(call BuildPackage,libpcre2))
+$(eval $(call BuildPackage,libpcre2-16))
+$(eval $(call BuildPackage,libpcre2-32))
+$(eval $(call HostBuild))