On Sun, 29 Nov 2009 20:38:45 -0500
Jeff Garzik <jeff@xxxxxxxxxx> wrote:
> Interesting... I recall the root cause clearly, now: /usr/include/db.h
> always refers to the latest installed db4, even if compat-db{,45,46} is
> installed. Our configure recipe links with the most recent db4 listed
> in configure.ac, combined with the installed /usr/include/db.h. Thus,
> each new db4 version produces a mismatch.
I solicited suggestions on a blog, and someone asked why we don't
use db without specific version. I assumed we do it so we don't
get linked with something ancient like db3. Is that so? If yes,
how about something like this:
--- a/configure.ac
+++ b/configure.ac
@@ -76,13 +76,11 @@ dnl -----------------------------
AC_CHECK_LIB(pcre, pcre_compile, PCRE_LIBS=-lpcre)
AC_CHECK_LIB(crypto, MD5_Init, CRYPTO_LIBS=-lcrypto)
AC_CHECK_LIB(ssl, SSL_new, SSL_LIBS=-lssl)
-AC_CHECK_LIB(db-4.8, db_create, DB4_LIBS=-ldb-4.8,
- AC_CHECK_LIB(db-4.7, db_create, DB4_LIBS=-ldb-4.7,
- AC_CHECK_LIB(db-4.6, db_create, DB4_LIBS=-ldb-4.6,
- AC_CHECK_LIB(db-4.5, db_create, DB4_LIBS=-ldb-4.5,
- AC_CHECK_LIB(db-4.4, db_create, DB4_LIBS=-ldb-4.4,
- AC_CHECK_LIB(db-4.3, db_create, DB4_LIBS=-ldb-4.3,
- [AC_MSG_ERROR([Missing required libdb 4.x])]))))))
+
+AC_CHECK_HEADERS([db.h], [], [AC_MSG_ERROR(Missing required db.h)])
+dnl We do not use sequence objects. It is a trick to force db4.3 or later.
+AC_CHECK_LIB(db, db_sequence_create, DB4_LIBS=-ldb)
+
AC_CHECK_LIB(event, event_base_new, EVENT_LIBS=-levent,
[AC_MSG_ERROR([Missing required libevent])])
AC_CHECK_LIB(argp, argp_parse, ARGP_LIBS=-largp)
(URL http://zaitcev.livejournal.com/195586.html)
-- Pete
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