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--- patch-2.5.4/error.c.program_name	Tue Apr  9 14:38:27 2002
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+++ patch-2.5.4/error.c	Tue Apr  9 14:38:43 2002
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@@ -80,7 +80,7 @@
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 /* The calling program should define program_name and set it to the
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    name of the executing program.  */
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-extern char *program_name;
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+extern char const program_name[];
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 # ifdef HAVE_STRERROR_R
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 #  define __strerror_r strerror_r