AC_SUBST(GUILE_CPPFLAGS)
AC_SUBST(GUILE_LIBS)
+# PR 17185, see if we can get the libgc version to see if we need
+# to apply the workaround.
+AC_CHECK_HEADERS(gc/gc.h)
+AC_CHECK_FUNCS([setenv])
+
# --------------------- #
# Check for libmcheck. #
# --------------------- #