commit 08dab9465b0470704662e96c083cac0a6fd76ef5
Author:     Reimar Döffinger <reimar.doeffin...@gmx.de>
AuthorDate: Sat Apr 11 20:06:30 2015 +0200
Commit:     Oswald Buddenhagen <o...@users.sf.net>
CommitDate: Mon Apr 13 09:19:02 2015 +0200

    Make Berkley DB an optional dependency.
    
    It doesn't seem necessary for any of the basic functionality.
    
    Signed-off-by: Reimar Döffinger <reimar.doeffin...@gmx.de>

 README                 |    2 +-
 configure.ac           |   13 ++++++++++---
 src/Makefile.am        |   13 ++++++++-----
 src/compat/Makefile.am |    2 +-
 src/drv_maildir.c      |    1 -
 5 files changed, 20 insertions(+), 11 deletions(-)

diff --git a/README b/README
index 66a0017..aa020de 100644
--- a/README
+++ b/README
@@ -61,7 +61,7 @@ isync executable still exists; it is a compatibility wrapper 
around mbsync.
 
 * Requirements
 
-    Berkley DB 4.2+
+    Berkley DB 4.2+ (optional)
     OpenSSL for TLS/SSL support (optional)
 
 * Installation
diff --git a/configure.ac b/configure.ac
index 7b4086d..d7d3404 100644
--- a/configure.ac
+++ b/configure.ac
@@ -146,8 +146,9 @@ AC_CACHE_CHECK([for Berkley DB >= 4.2], ac_cv_berkdb4,
                db->truncate(db, 0, 0, 0);
                db->open(db, 0, "foo", "foo", DB_HASH, DB_CREATE, 0)],
               [ac_cv_berkdb4=yes])])
-if test "x$ac_cv_berkdb4" = xno; then
-  AC_MSG_ERROR([Berkley DB >= 4.2 not found.])
+if test "x$ac_cv_berkdb4" = xyes; then
+  AC_SUBST([DB_LIBS], ["-ldb"])
+  AC_DEFINE(USE_DB, 1, [if Berkley DB should be used])
 fi
 
 have_zlib=
@@ -165,7 +166,8 @@ AC_ARG_ENABLE(compat,
 if test "x$ob_cv_enable_compat" != xno; then
   AC_CHECK_FUNCS(getopt_long)
 fi
-AM_CONDITIONAL(with_compat, test "x$ob_cv_enable_compat" != xno)
+AM_CONDITIONAL(with_compat, test "x$ob_cv_enable_compat" != xno -a 
"x$ac_cv_berkdb4" = xyes)
+AM_CONDITIONAL(with_mdconvert, test "x$ac_cv_berkdb4" = xyes)
 
 AC_CONFIG_FILES([Makefile src/Makefile src/compat/Makefile isync.spec])
 AC_OUTPUT
@@ -186,4 +188,9 @@ if test -n "$have_zlib"; then
 else
     AC_MSG_RESULT([Not using zlib])
 fi
+if test "x$ac_cv_berkdb4" = xyes; then
+    AC_MSG_RESULT([Using Berkley DB])
+else
+    AC_MSG_RESULT([Not using Berkley DB])
+fi
 AC_MSG_RESULT()
diff --git a/src/Makefile.am b/src/Makefile.am
index 0a49f21..b548d60 100644
--- a/src/Makefile.am
+++ b/src/Makefile.am
@@ -3,20 +3,23 @@ compat_dir = compat
 endif
 SUBDIRS = $(compat_dir)
 
-bin_PROGRAMS = mbsync mdconvert
-
 mbsync_SOURCES = main.c sync.c config.c util.c socket.c driver.c drv_imap.c 
drv_maildir.c
-mbsync_LDADD = -ldb $(SSL_LIBS) $(SOCK_LIBS) $(SASL_LIBS) $(Z_LIBS)
+mbsync_LDADD = $(DB_LIBS) $(SSL_LIBS) $(SOCK_LIBS) $(SASL_LIBS) $(Z_LIBS)
 noinst_HEADERS = common.h config.h driver.h sync.h socket.h
 
 mdconvert_SOURCES = mdconvert.c
-mdconvert_LDADD = -ldb
+mdconvert_LDADD = $(DB_LIBS)
+if with_mdconvert
+mdconvert_prog = mdconvert
+mdconvert_man = mdconvert.1
+endif
 
 EXTRA_PROGRAMS = tst_timers
 
 tst_timers_SOURCES = tst_timers.c util.c
 
-man_MANS = mbsync.1 mdconvert.1
+bin_PROGRAMS = mbsync $(mdconvert_prog)
+man_MANS = mbsync.1 $(mdconvert_man)
 
 exampledir = $(docdir)/examples
 example_DATA = mbsyncrc.sample
diff --git a/src/compat/Makefile.am b/src/compat/Makefile.am
index c234f0f..6a99942 100644
--- a/src/compat/Makefile.am
+++ b/src/compat/Makefile.am
@@ -1,7 +1,7 @@
 bin_PROGRAMS = isync
 
 isync_SOURCES = main.c config.c convert.c util.c
-isync_LDADD = -ldb
+isync_LDADD = $(DB_LIBS)
 noinst_HEADERS = isync.h
 
 man_MANS = isync.1
diff --git a/src/drv_maildir.c b/src/drv_maildir.c
index 98e1687..18ebbaf 100644
--- a/src/drv_maildir.c
+++ b/src/drv_maildir.c
@@ -38,7 +38,6 @@
 #include <time.h>
 #include <utime.h>
 
-#define USE_DB 1
 #ifdef __linux__
 # define LEGACY_FLOCK 1
 #endif

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