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From Justin Erenkrantz <jerenkra...@apache.org>
Subject Re: [PATCH] allow apr-util to detect Debian's db4.0
Date Mon, 16 Dec 2002 23:58:53 GMT
--On Monday, December 16, 2002 11:19 PM +0000 Philip Martin 
<philip@codematters.co.uk> wrote:

> Hello
>
> Debian provides a db4 with configured with --with-uniquenames so the
> symbols are suffixed _4000.  apr-util attempts to detect db4 using
> AC_CHECK_LIB which generates programs like
>
> char db_create();
>
> int main() {
> db_create()
> ; return 0; }
>
> Since this doesn't include the db.h header file it fails to link and
> so the db4 detection fails.
>
> I don't know whether apr-util is supposed to detect all possible db
> installations, but the following patch detects Debian's db4.
>
>
> Look for the symbol db_create_4000 (as used by Debian) when checking
> for db4.
>
> Index: build/apu-conf.m4
> ===================================================================
> RCS file: /home/cvspublic/apr-util/build/apu-conf.m4,v
> retrieving revision 1.47
> diff -u -r1.47 apu-conf.m4
> --- build/apu-conf.m4	15 Dec 2002 19:36:41 -0000	1.47
> +++ build/apu-conf.m4	16 Dec 2002 22:29:44 -0000
> @@ -144,12 +144,17 @@
>    ])])])
>  if test "$apu_db_version" != "4"; then
>  AC_CHECK_HEADER(db.h, [
> +  AC_CHECK_LIB(db, db_create_4000, [
> +  apu_db_header=db.h
> +  apu_db_lib=db
> +  apu_db_version=4
> +  ], [

Why should we check for db_create_4000 first?  Why not wait until 
after db_create is not found?  -- justin

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