dev-cpp/clucene: fix build w/ libcxx

Use FreeBSD's patches.

Closes: https://bugs.gentoo.org/862195
Signed-off-by: Sam James <sam@gentoo.org>

dev-cpp/clucene/clucene-2.3.3.4-r8.ebuild

@@ -0,0 +1,66 @@
+# Copyright 1999-2022 Gentoo Authors
+# Distributed under the terms of the GNU General Public License v2
+
+EAPI=7
+
+MY_PN="${PN}"-core
+MY_P="${MY_PN}"-"${PV}"
+
+inherit cmake
+
+DESCRIPTION="High-performance, full-featured text search engine based off of lucene in C++"
+HOMEPAGE="http://clucene.sourceforge.net/"
+SRC_URI="mirror://sourceforge/clucene/${MY_P}.tar.gz"
+
+LICENSE="|| ( Apache-2.0 LGPL-2.1 )"
+SLOT="1"
+KEYWORDS="~alpha ~amd64 ~arm ~arm64 ~hppa ~ia64 ~mips ~ppc ~ppc64 ~riscv ~sparc ~x86 ~amd64-linux ~x86-linux ~ppc-macos"
+
+IUSE="debug doc static-libs"
+
+BDEPEND="
+	doc? ( >=app-doc/doxygen-1.4.2 )
+"
+
+RESTRICT="test"
+
+DOCS=(AUTHORS ChangeLog README README.PACKAGE REQUESTS)
+
+S="${WORKDIR}/${MY_PN}-${PV}"
+
+PATCHES=(
+	"${FILESDIR}/${P}-fix-clang.patch"
+	"${FILESDIR}/${P}-contrib.patch"
+	"${FILESDIR}/${P}-pkgconfig.patch"
+	"${FILESDIR}/${P}-gcc6.patch"
+	"${FILESDIR}/${P}-gmtime.patch"
+	"${FILESDIR}/${P}-musl-pthread.patch"
+	"${FILESDIR}/${P}-libcxx.patch"
+)
+
+src_prepare() {
+	cmake_src_prepare
+
+	# patch out installing bundled boost headers, we build against system one
+	sed -i \
+		-e '/ADD_SUBDIRECTORY (src\/ext)/d' \
+		CMakeLists.txt || die
+	rm -rf src/ext || die
+}
+
+src_configure() {
+	# Disabled threads: see upstream bug
+	# https://sourceforge.net/p/clucene/bugs/197/
+	local mycmakeargs=(
+		-DENABLE_ASCII_MODE=OFF
+		-DENABLE_PACKAGING=OFF
+		-DDISABLE_MULTITHREADING=OFF
+		-DBUILD_CONTRIBS_LIB=ON
+		"-DLIB_DESTINATION=${EPREFIX}/usr/$(get_libdir)"
+		-DENABLE_DEBUG=$(usex debug)
+		-DENABLE_CLDOCS=$(usex doc)
+		-DBUILD_STATIC_LIBRARIES=$(usex static-libs)
+	)
+
+	cmake_src_configure
+}

dev-cpp/clucene/files/clucene-2.3.3.4-libcxx.patch

@@ -0,0 +1,48 @@
+https://bugs.gentoo.org/862195
+https://cgit.freebsd.org/ports/tree/textproc/clucene/files/patch-src__core__CLucene__index__DocumentsWriter.cpp
+https://cgit.freebsd.org/ports/plain/textproc/clucene/files/patch-src__core__CLucene__util__VoidMap.h
+--- a/src/core/CLucene/index/DocumentsWriter.cpp
++++ b/src/core/CLucene/index/DocumentsWriter.cpp
+@@ -125,7 +125,7 @@
+   if (this->postingsFreeListDW.values){
+       if (this->postingsFreeCountDW < this->postingsFreeListDW.length) {
+           memset(this->postingsFreeListDW.values + this->postingsFreeCountDW
+-              , NULL
++              , 0
+               , sizeof(Posting*));
+       }
+       postingsFreeListDW.deleteUntilNULL();
+
+--- a/src/core/CLucene/util/VoidMap.h
++++ b/src/core/CLucene/util/VoidMap.h
+@@ -11,8 +11,13 @@
+ #include "CLucene/LuceneThreads.h"
+ 
+ #if defined(_CL_HAVE_TR1_UNORDERED_MAP) && defined(_CL_HAVE_TR1_UNORDERED_SET)
++#if defined(_LIBCPP_VERSION)
++	#include <unordered_map>
++	#include <unordered_set>
++#else
+ 	#include <tr1/unordered_map>
+ 	#include <tr1/unordered_set>
++#endif
+ #elif defined(_CL_HAVE_HASH_MAP) && defined(_CL_HAVE_HASH_SET)
+ 	//hashing is all or nothing!
+ 	#include <hash_map>
+@@ -83,7 +88,7 @@
+ 	_vt get( _kt k) const {
+ 		const_iterator itr = base::find(k);
+ 		if ( itr==base::end() )
+-			return (_vt)NULL;
++			return static_cast<_vt>(0);
+ 		else
+ 			return itr->second;
+ 	}
+@@ -316,6 +321,7 @@
+ 		if ( _this::dk || _this::dv )
+ 			_this::remove(k);
+ 
++		(*this)[k] = v;;
+ 	}
+ };
+