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Re: [PATCH] Fix PR bootstrap/42798
- From: Ralf Wildenhues <Ralf dot Wildenhues at gmx dot de>
- To: Paolo Bonzini <bonzini at gnu dot org>, binutils at sourceware dot org, gdb-patches at sourceware dot org
- Cc: gcc-patches at gcc dot gnu dot org
- Date: Thu, 3 Jun 2010 08:33:22 +0200
- Subject: Re: [PATCH] Fix PR bootstrap/42798
- References: <20100601204405.GA1170@gmx.de> <AANLkTim4-8VpK907cHTIcT2ELeZEgOBpLf0FUJmpPCJN@mail.gmail.com> <20100602111845.GA16161@ins.uni-bonn.de> <4C064B77.3020207@gnu.org>
* Paolo Bonzini wrote on Wed, Jun 02, 2010 at 02:15:51PM CEST:
> Yes, that's fine. Just commit config/ changes to gcc and src first,
> and everything else afterwards in a separate commit.
Committed to gcc and synced to src:
(this patch causes minor trivial non-semantic changes in regenerated
configure scripts which I will address in a followup.)
Cheers,
Ralf
2010-06-03 Joern Rennecke <joern.rennecke@embecosm.com>
Ralf Wildenhues <Ralf.Wildenhues@gmx.de>
PR bootstrap/42798
* override.m4 (_AC_CHECK_DECL_BODY, _AC_CHECK_DECLS): Import
definitions from git Autoconf.
Index: config/override.m4
===================================================================
--- config/override.m4 (revision 160209)
+++ config/override.m4 (working copy)
@@ -272,3 +272,44 @@
[m4_define([_$0_text], [$1])m4_builtin([m4wrap],
[m4_default(m4_defn([_$0_text])m4_undefine([_$0_text]))])])])
])
+
+m4_version_prereq([2.66],, [
+dnl We need AC_CHECK_DECL which works for overloaded C++ functions.
+
+# _AC_CHECK_DECL_BODY
+# -------------------
+# Shell function body for AC_CHECK_DECL.
+m4_define([_AC_CHECK_DECL_BODY],
+[ AS_LINENO_PUSH([$[]1])
+ [as_decl_name=`echo $][2|sed 's/ *(.*//'`]
+ [as_decl_use=`echo $][2|sed -e 's/(/((/' -e 's/)/) 0&/' -e 's/,/) 0& (/g'`]
+ AC_CACHE_CHECK([whether $as_decl_name is declared], [$[]3],
+ [AC_COMPILE_IFELSE([AC_LANG_PROGRAM([$[]4],
+[@%:@ifndef $[]as_decl_name
+@%:@ifdef __cplusplus
+ (void) $[]as_decl_use;
+@%:@else
+ (void) $[]as_decl_name;
+@%:@endif
+@%:@endif
+])],
+ [AS_VAR_SET([$[]3], [yes])],
+ [AS_VAR_SET([$[]3], [no])])])
+ AS_LINENO_POP
+])# _AC_CHECK_DECL_BODY
+
+# _AC_CHECK_DECLS(SYMBOL, ACTION-IF_FOUND, ACTION-IF-NOT-FOUND,
+# INCLUDES)
+# -------------------------------------------------------------
+# Helper to AC_CHECK_DECLS, which generates the check for a single
+# SYMBOL with INCLUDES, performs the AC_DEFINE, then expands
+# ACTION-IF-FOUND or ACTION-IF-NOT-FOUND.
+m4_define([_AC_CHECK_DECLS],
+[AC_CHECK_DECL([$1], [ac_have_decl=1], [ac_have_decl=0], [$4])]dnl
+[AC_DEFINE_UNQUOTED(AS_TR_CPP(m4_bpatsubst(HAVE_DECL_[$1],[ *(.*])),
+ [$ac_have_decl],
+ [Define to 1 if you have the declaration of `$1',
+ and to 0 if you don't.])]dnl
+[m4_ifvaln([$2$3], [AS_IF([test $ac_have_decl = 1], [$2], [$3])])])
+
+])