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      1 // RUN: %clang_cc1 -fsyntax-only -verify %s -triple i686-pc-linux-gnu
      2 
      3 // PR 4142 - support glibc extension to printf: '%m' (which prints strerror(errno)).
      4 int printf(char const*,...);
      5 void percentm(void) {
      6   printf("%m");
      7 }
      8