dev-libs/boost: add USE=stacktrace

* required for media-gfx/inkscape-1.3

Bug: https://bugs.gentoo.org/689300
Bug: https://bugs.gentoo.org/911267
Signed-off-by: David Seifert <soap@gentoo.org>

dev-libs/boost/boost-1.83.0-r1.ebuild

@@ -17,7 +17,7 @@ S="${WORKDIR}/${PN}_${MY_PV}"
 LICENSE="Boost-1.0"
 SLOT="0/${PV}" # ${PV} instead of the major version due to bug 486122
 #KEYWORDS="~alpha ~amd64 ~arm ~arm64 ~hppa ~ia64 ~loong ~m68k ~mips ~ppc ~ppc64 ~riscv ~s390 ~sparc ~x86 ~amd64-linux ~x86-linux ~arm64-macos ~ppc-macos ~x64-macos ~x64-solaris"
-IUSE="bzip2 context debug doc icu lzma +nls mpi numpy python tools zlib zstd"
+IUSE="bzip2 context debug doc icu lzma +nls mpi numpy python stacktrace tools zlib zstd"
 REQUIRED_USE="python? ( ${PYTHON_REQUIRED_USE} )"
 # the tests will never fail because these are not intended as sanity
 # tests at all. They are more a way for upstream to check their own code
@@ -162,7 +162,7 @@ src_configure() {
 		$(usev !mpi --without-mpi)
 		$(usev !nls --without-locale)
 		$(usev !context '--without-context --without-coroutine --without-fiber')
-		--without-stacktrace
+		$(usev !stacktrace --without-stacktrace)
 		--boost-build="${BROOT}"/usr/share/b2/src
 		--layout=system
 		# building with threading=single is currently not possible

dev-libs/boost/metadata.xml

@@ -15,6 +15,7 @@
 		<flag name="doc">Install the full API documentation documentation. This takes over 200MB of extra disk space.</flag>
 		<flag name="nls">Build libboost_locale. This library requires compatible C library interfaces, which might not be provided by uClibc or other embedded libraries.</flag>
 		<flag name="numpy">Optionally build NumPy extensions when Boost.Python is enabled</flag>
+		<flag name="stacktrace">Build the full Boost.Stacktrace dynamic library instead of relying on the header-only implementation</flag>
 		<flag name="tools">Build and install the boost tools (bcp, quickbook, inspect, wave)</flag>
 	</use>
 	<upstream>