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[PATCH] PR bootstrap/35169: HP-UX/IA awk bug
- From: Ralf Wildenhues <Ralf dot Wildenhues at gmx dot de>
- To: gcc-patches at gcc dot gnu dot org, autoconf-patches at gnu dot org
- Cc: bugzilla-gcc at thewrittenword dot com
- Date: Mon, 31 Mar 2008 23:18:15 +0200
- Subject: [PATCH] PR bootstrap/35169: HP-UX/IA awk bug
GCC PR 35169 uncovers an awk printf %u bug on ia64-hp-hpux11.23 not
present on HP-UX/PA. I confirmed that the patch against GCC produces
a correct options.c with its awk, and of course with GNU awk.
OK for trunk, 4.3, 4.2, and 4.1?
This is a 4.1 regression introduced inadvertently on 2006-05-16
(by adding another output field after the %u). I checked *.awk
files in GCC for other instances of this.
Below is also a patch for the portability section of the Autoconf
manual. OK to apply, and who should be credited?
Can the bug reporter please file a trouble ticket with HP so they can
fix this? Also, could you bootstrap GCC on ia64-hp-hpux11.23 with the
patch applied?
Thanks,
Ralf
gcc/ChangeLog:
2008-03-31 Ralf Wildenhues <Ralf.Wildenhues@gmx.de>
PR bootstrap/35169
* optc-gen.awk: Work around HP-UX/IA awk bug.
diff --git a/gcc/optc-gen.awk b/gcc/optc-gen.awk
index cd10244..717f384 100644
--- a/gcc/optc-gen.awk
+++ b/gcc/optc-gen.awk
@@ -189,8 +189,10 @@ for (i = 0; i < n_opts; i++) {
idx = -1;
}
}
- printf(" { %c-%s%c,\n %s,\n %s, %u, %d,\n",
- quote, opts[i], quote, hlp, back_chain[i], len, idx)
+ # Split the printf after %u to work around an HP-UX awk bug.
+ printf(" { %c-%s%c,\n %s,\n %s, %u,",
+ quote, opts[i], quote, hlp, back_chain[i], len)
+ printf(" %d,\n", idx)
condition = opt_args("Condition", flags[i])
cl_flags = switch_flags(flags[i])
if (condition != "")
autoconf/ChangeLog:
2008-03-31 Ralf Wildenhues <Ralf.Wildenhues@gmx.de>
* doc/autoconf.texi (Limitations of Usual Tools): Mention awk %u
bug on HP-UX/IA.
Report by ...
diff --git a/doc/autoconf.texi b/doc/autoconf.texi
index dc06bab..e6a892e 100644
--- a/doc/autoconf.texi
+++ b/doc/autoconf.texi
@@ -14541,6 +14541,14 @@ bar
Either do not depend on such patterns (i.e., use @samp{/^(.*foo|bar)/},
or use a simple test to reject such implementations.
+On @samp{ia64-hp-hpux11.23}, Awk mishandles @code{printf} conversions
+after @code{%u}:
+
+@example
+$ @kbd{awk 'BEGIN @{ printf "%u %d\n", 0, -1 @}'}
+0 0
+@end example
+
@acronym{AIX} version 5.2 has an arbitrary limit of 399 on the
length of regular expressions and literal strings in an Awk program.