--- /dev/null
+* Fix build system when USE="-threads"
+* Add DESTDIR in order to prevent sandbox failure
+* Don't build samples
+
+--- a/configure.ac
++++ b/configure.ac
+@@ -124,6 +124,7 @@
+ AC_CXX_HAVE_LSTRING
+
+ ACX_PTHREAD
++AM_CONDITIONAL([THREADS], [test "x${acx_pthread_ok}" = "xyes"])
+
+ # Checks for library functions.
+ #AC_FUNC_ERROR_AT_LINE
+--- a/Makefile.am
++++ b/Makefile.am
+@@ -1,4 +1,4 @@
+-SUBDIRS = src tests samples
++SUBDIRS = src tests
+
+ EXTRA_DIST = version.incl \
+ xerces-c.spec \
+--- a/src/xercesc/util/MsgLoaders/MsgCatalog/Makefile.in
++++ b/src/xercesc/util/MsgLoaders/MsgCatalog/Makefile.in
+@@ -5,7 +5,7 @@
+ prefix = @prefix@
+ INSTALL = @INSTALL@
+ INSTALL_PROGRAM = @INSTALL_PROGRAM@
+-mkdir_p = @mkdir_p@
++mkdir_p = @MKDIR_P@
+
+ include $(top_srcdir)/version.incl
+
+@@ -48,11 +48,11 @@
+ # for installing the library
+ # for installing the library
+ install: $(RESTARGET)
+- $(mkdir_p) $(prefix)/msg
+- $(INSTALL_PROGRAM) $(RESTARGET) $(prefix)/msg
++ $(mkdir_p) $(DESTDIR)/$(prefix)/share/xerces-c/msg
++ $(INSTALL_PROGRAM) $(RESTARGET) $(DESTDIR)/$(prefix)/share/xerces-c/msg
+
+ uninstall:
+- -rm -f $(prefix)/msg/$(RESFILES)
++ -rm -f $(DESTDIR)/$(prefix)/share/xerces-c/msg/$(RESFILES)
+
+
+ # Needed to support "make dist"
+--- a/tests/Makefile.am
++++ b/tests/Makefile.am
+@@ -21,7 +21,7 @@
+
+ check_PROGRAMS = ${testprogs}
+
+-LDADD = ${top_builddir}/src/libxerces-c.la
++LDADD = $(top_builddir)/src/libxerces-c.la $(PTHREAD_LIBS)
+ # the -I${top_builddir}/src is needed to pick the xercesc/util/Xerces_autoconf_config.hpp
+ # header file when doing out-of-tree builds
+ AM_CPPFLAGS = -I${top_builddir}/src -I${top_srcdir}/src
+@@ -86,8 +86,10 @@
+ # src/ParserTest/ParserTest_Parser.cpp \
+ # src/ParserTest/ParserTest_Parser.hpp
+
++if THREADS
+ testprogs += ThreadTest
+ ThreadTest_SOURCES = src/ThreadTest/ThreadTest.cpp
++endif
+
+ # Fails to compile under gcc 4 (ambiguous calls to NullPointerException)
+ # dcargill says this is obsolete and we can delete it.
--- /dev/null
+# Copyright 1999-2016 Gentoo Foundation
+# Distributed under the terms of the GNU General Public License v2
+# $Id$
+
+EAPI=6
+
+inherit autotools
+
+DESCRIPTION="A validating XML parser written in a portable subset of C++"
+HOMEPAGE="http://xerces.apache.org/xerces-c/"
+SRC_URI="mirror://apache/xerces/c/3/sources/${P}.tar.gz"
+
+LICENSE="Apache-2.0"
+SLOT="0"
+KEYWORDS="~alpha ~amd64 ~arm ~hppa ~ppc ~ppc64 ~sparc ~x86 ~x86-fbsd ~amd64-linux ~x86-linux"
+
+IUSE="cpu_flags_x86_sse2 curl doc elibc_Darwin elibc_FreeBSD examples iconv icu static-libs test threads"
+
+RDEPEND="icu? ( dev-libs/icu:0= )
+ curl? ( net-misc/curl )
+ virtual/libiconv"
+DEPEND="${RDEPEND}
+ doc? ( app-doc/doxygen )
+ test? ( dev-lang/perl )"
+
+DOCS=( CREDITS KEYS NOTICE README version.incl )
+PATCHES=( "${FILESDIR}/${PN}-3.1.4-fix-build-system.patch" )
+
+pkg_setup() {
+ export ICUROOT="/usr"
+
+ if use iconv && use icu; then
+ ewarn "This package can use iconv or icu for loading messages"
+ ewarn "and transcoding, but not both. ICU takes precedence."
+ fi
+}
+
+src_prepare() {
+ default
+ eautoreconf
+}
+
+src_configure() {
+ local msgloader
+ if use icu; then
+ msgloader="icu"
+ elif use iconv; then
+ msgloader="iconv"
+ else
+ msgloader="inmemory"
+ fi
+
+ local transcoder
+ if use icu; then
+ transcoder="icu"
+ elif use elibc_Darwin; then
+ transcoder="macosunicodeconverter"
+ elif use elibc_FreeBSD; then
+ transcoder="iconv"
+ else
+ transcoder="gnuiconv"
+ fi
+ # for interix maybe: transcoder="windows"
+
+ # 'cfurl' is only available on OSX and 'socket' isn't supposed to work.
+ # But the docs aren't clear about it, so we would need some testing...
+ local netaccessor
+ if use curl; then
+ netaccessor="curl"
+ elif use elibc_Darwin; then
+ netaccessor="cfurl"
+ else
+ netaccessor="socket"
+ fi
+
+ econf \
+ --disable-pretty-make \
+ --enable-msgloader-${msgloader} \
+ --enable-transcoder-${transcoder} \
+ --enable-netaccessor-${netaccessor} \
+ $(use_enable cpu_flags_x86_sse2 sse2) \
+ $(use_enable threads) \
+ $(use_enable static-libs static)
+}
+
+src_compile() {
+ default
+
+ if use doc; then
+ cd doc || die
+ doxygen || die "making docs failed"
+ HTML_DOCS=( doc/html/. )
+ fi
+}
+
+src_install () {
+ default
+
+ # package provides .pc files
+ find "${D}" -name '*.la' -delete || die
+
+ if use examples; then
+ rm -f samples/Makefile* || die
+ docinto examples
+ dodoc -r samples/.
+ docompress -x /usr/share/doc/${PF}/examples
+ fi
+
+ # To make sure an appropriate NLS msg file is around when using
+ # the iconv msgloader ICU has the messages compiled in.
+ if use iconv && ! use icu; then
+ doenvd "${FILESDIR}/50xerces-c"
+ fi
+}