Fixed Issue 5900: distutils.command.build_ext - Ensure RUNPATH is added to extension modules with RPATH if GNU ld is used
diff --git a/configure.in b/configure.in
index 1491417..d2c41a9 100644
--- a/configure.in
+++ b/configure.in
@@ -647,6 +647,25 @@
fi
AC_MSG_RESULT($LINKCC)
+# GNULD is set to "yes" if the GNU linker is used. If this goes wrong
+# make sure we default having it set to "no": this is used by
+# distutils.unixccompiler to know if it should add --enable-new-dtags
+# to linker command lines, and failing to detect GNU ld simply results
+# in the same bahaviour as before.
+AC_SUBST(GNULD)
+AC_MSG_CHECKING(for GNU ld)
+ac_prog=ld
+if test "$GCC" = yes; then
+ ac_prog=`$CC -print-prog-name=ld`
+fi
+case `"$ac_prog" -V 2>&1 < /dev/null` in
+ *GNU*)
+ GNULD=yes;;
+ *)
+ GNULD=no;;
+esac
+AC_MSG_RESULT($GNULD)
+
AC_MSG_CHECKING(for --enable-shared)
AC_ARG_ENABLE(shared,
AC_HELP_STRING(--enable-shared, disable/enable building shared python library))