build/pkgs/fplll/spkg-install.in: Configure --without-qd if we use gcc from spkg

Author: Matthias Koeppe

build/pkgs/fplll/spkg-install.in

@@ -20,6 +20,11 @@ if [ "x$SAGE_DEBUG" = "xyes" ]; then
    CONFIGUREFLAGS="$CONFIGUREFLAGS --enable-debug"
 fi
 
+if [ -x "$SAGE_LOCAL"/bin/gcc ]; then
+    # Trac #31624: Avoid C++ ABI issues
+    CONFIGUREFLAGS="$CONFIGUREFLAGS --without-qd"
+fi
+
 export CXXFLAGS="$CXXFLAGS"
 export CPPFLAGS="$CPPFLAGS"
 export CXX="$CXX"