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Import AC_CHECK_DECL for C++ fixes from git Autoconf.

Browse source 
config/:
	PR bootstrap/42798
	* override.m4 (_AC_CHECK_DECL_BODY, _AC_CHECK_DECLS): Import
	definitions from git Autoconf.

Co-Authored-By: Ralf Wildenhues <Ralf.Wildenhues@gmx.de>

From-SVN: r160210
This commit is contained in:
Joern Rennecke 2010-06-03 06:32:27 +00:00 • committed by Ralf Wildenhues
parent 64a6444721
commit 765a03052d
2 changed files with 48 additions and 0 deletions
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7
config/ChangeLog
View file

@ -1,3 +1,10 @@
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.
2010-04-13 Steve Ellcey <sje@cup.hp.com>
* elf.m4: Add hppa[12]*-*-hpux* to list of non-elf platforms.

41
config/override.m4
View file

@ -272,3 +272,44 @@ m4_define([m4_wrap], [m4_ifdef([_$0_text],
[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])])])
])