on manylinux, build and install a modern pkg-config

Author: flavorjones

Dockerfile.mri.erb

@@ -233,6 +233,10 @@ RUN for f in addr2line gcc gcov-tool ranlib ar dwp gcc-ranlib nm readelf as elfe
 COPY build/math_h.patch /root/
 RUN cd /usr/include/ && \
     patch -p1 < /root/math_h.patch
+
+# Update pkg-config because the distro ships 0.27.1 which is old and has bugs and performance issues.
+COPY build/mk_pkg_config.sh /root/
+RUN /root/mk_pkg_config.sh
 <% end %>
 
 <% if platform =~ /arm64-darwin/ %>

build/mk_pkg_config.sh

@@ -0,0 +1,24 @@
+#! /usr/bin/env bash
+
+set -o errexit
+set -o pipefail
+set -x
+
+# sha256 from https://lists.freedesktop.org/archives/pkg-config/2017-March/001084.html
+TARFILE=pkg-config-0.29.2.tar.gz
+DIR=pkg-config-0.29.2
+CHECKSUM=6fc69c01688c9458a57eb9a1664c9aba372ccda420a02bf4429fe610e7e7d591
+
+cd /tmp
+
+wget https://pkgconfig.freedesktop.org/releases/${TARFILE}
+sha256sum ${TARFILE} | grep "${CHECKSUM}"
+
+tar -xzvf ${TARFILE}
+cd $DIR
+
+./configure --prefix=/usr/local
+make install
+
+pkg-config --version
+echo "OK"