https://bugs.gentoo.org/827925
--- a/configure.in
+++ b/configure.in
@@ -79,11 +79,11 @@ else
 fi

 dnl Checks for programs.
 dnl AC_PROG_CC
 AC_LANG_CPLUSPLUS
-CXXFLAGS=" "
+CXXFLAGS="-fPIC"
 dnl ^^^ set it to non-empty, so AC_PROG_CXX won't include `-g'
 CCC="$CCC g++"
 dnl ^^^ check g++ before c++ (see acspecific.m4, grep AC_PROG_CXX)
 AC_PROG_CXX