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Re: AC_CHECK_DECLS(basename) (Was: Re: Ping: patches required for --enable-build-with-cxx)
Quoting Paolo Bonzini <bonzini@gnu.org>:
Maybe we can use this in AC_CHECK_DECLS instead of having a new
separate macro. ÂIf there is a parenthesis in the name call the new
version, if there is none, call the old one.
You shouldn't need to keep the old version around, it's supposed to be
a drop-in replacement. ÂThe reason I used a new name was that I'm not
sure if GCC project can wait till we have a suitable macro in autoconf.
Yes, I saw that now in the libcpp part of your patch. That's even better!
I've attached the patch against autoconf 2.64.
2010-02-18 Joern Rennecke <joern.rennecke@embecosm.com>
* general.m4 (_AC_CHECK_DECL_BODY): Process trailing function
argument types as arguments to use for C++.
(_AC_CHECK_DECLS): Filter out trailing function argument types
when henerating the HAVE_DECL_* macro.
--- autoconf-2.64/share/autoconf/autoconf/general.m4 2010-01-19 12:26:54.937745483 +0000
+++ /home/amylaar/general.m4-pr42798 2010-02-18 00:50:52.084941182 +0000
@@ -2806,10 +2806,16 @@ AC_DEFUN([AC_CHECK_FILES],
# Shell function body for AC_CHECK_DECL.
m4_define([_AC_CHECK_DECL_BODY],
[ AS_LINENO_PUSH([$[]1])
- AC_CACHE_CHECK([whether $[]2 is declared], [$[]3],
+ [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 $[]2
- (void) $[]2;
+[@%:@ifndef $[]as_decl_name
+@%:@ifdef __cplusplus
+ (void) $[]as_decl_use;
+@%:@else
+ (void) $[]as_decl_name;
+@%:@endif
@%:@endif
])],
[AS_VAR_SET([$[]3], [yes])],
@@ -2844,7 +2850,7 @@ AS_VAR_POPDEF([ac_Symbol])dnl
# 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([HAVE_DECL_$1]), [$ac_have_decl],
+[AC_DEFINE_UNQUOTED(AS_TR_CPP(patsubst(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])])])