+dnl Check for an ANSI C compiler.
+AC_GNU_SOURCE
+AC_PROG_CC
+AC_C_PROTOTYPES
+test "x$U" != "x" && AC_MSG_ERROR(Compiler not ANSI compliant)
+AC_PROG_CC_C_O
+
+AC_CHECK_FUNCS([memmem])
+
+dnl Do we have pahole (from acme's "dwarves" library)?
+AC_PATH_PROG(PAHOLE,pahole)
+