dev-python/cffi: Fix cross-compiling of 1.11.5

We need to tell it the right pkg-config.

Signed-off-by: James Le Cuirot <chewi@gentoo.org>
Package-Manager: Portage-2.3.49, Repoman-2.3.10

dev-python/cffi/cffi-1.11.5.ebuild

@@ -7,7 +7,7 @@ EAPI=6
 # pypy bundles a modified version of cffi. Use python_gen_cond_dep instead.
 PYTHON_COMPAT=( python2_7 python3_{4,5,6,7} )
 
-inherit distutils-r1
+inherit distutils-r1 toolchain-funcs
 
 DESCRIPTION="Foreign Function Interface for Python calling C code"
 HOMEPAGE="https://cffi.readthedocs.io/ https://pypi.org/project/cffi/"
@@ -29,6 +29,10 @@ DEPEND="${RDEPEND}
 # Avoid race on _configtest.c (distutils/command/config.py:_gen_temp_sourcefile)
 DISTUTILS_IN_SOURCE_BUILD=1
 
+src_configure() {
+	tc-export PKG_CONFIG
+}
+
 python_compile_all() {
 	use doc && emake -C doc html
 }