$ echo '1errprint(2)3' | m4 2>&1
213
Yuck - we interleaved output to /dev/tty (although Solaris has the same bug).
It is much nicer to flush all pending stdout before printing to stderr (at
least, the gnulib error module thinks so), in case the two FILEs point to the
same underlying file:
$ echo '1errprint(2)3' | src/m4 2>&1
123
2006-08-16 Eric Blake <[EMAIL PROTECTED]>
* src/builtin.c (m4_errprint): Flush buffers before printing to
stderr.
Index: src/builtin.c
===================================================================
RCS file: /sources/m4/m4/src/Attic/builtin.c,v
retrieving revision 1.1.1.1.2.32
diff -u -r1.1.1.1.2.32 builtin.c
--- src/builtin.c 15 Aug 2006 13:51:47 -0000 1.1.1.1.2.32
+++ src/builtin.c 16 Aug 2006 14:23:29 -0000
@@ -1231,6 +1231,7 @@
return;
dump_args (obs, argc, argv, " ", FALSE);
obstack_1grow (obs, '\0');
+ debug_flush_files ();
fprintf (stderr, "%s", (char *) obstack_finish (obs));
fflush (stderr);
}
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