Bug 139: portability fixes and documentation.

[exim.git] / src / src / EDITME

diff --git a/src/src/EDITME b/src/src/EDITME
index 3c162c94ab34fc27559f5d5bad03b819d0989838..74c507d3a22ea5db7949f18feebab70830a65f2d 100644 (file)
--- a/src/src/EDITME
+++ b/src/src/EDITME
@@ -248,6 +248,15 @@ TRANSPORT_SMTP=yes
 # SUPPORT_MBX=yes
 
 
+#------------------------------------------------------------------------------
+# See below for dynamic lookup modules.
+# LOOKUP_MODULE_DIR=/usr/lib/exim/lookups/
+
+# To build a module dynamically, you'll need to define CFLAGS_DYNAMIC for
+# your platform.  Eg:
+# CFLAGS_DYNAMIC=-shared -rdynamic
+# CFLAGS_DYNAMIC=-shared -rdynamic -fPIC
+
 #------------------------------------------------------------------------------
 # These settings determine which file and database lookup methods are included
 # in the binary. See the manual chapter entitled "File and database lookups"
@@ -256,6 +265,18 @@ TRANSPORT_SMTP=yes
 # LOOKUP_DNSDB does *not* refer to general mail routing using the DNS. It is
 # for the specialist case of using the DNS as a general database facility (not
 # common).
+# If set to "2" instead of "yes" then the corresponding lookup will be
+# built as a module and must be installed into LOOKUP_MODULE_DIR. You need to
+# add -export-dynamic -rdynamic to EXTRALIBS. You may also need to add -ldl to
+# EXTRALIBS so that dlopen() is available to Exim. You need to define
+# LOOKUP_MODULE_DIR above so the exim binary actually loads dynamic lookup
+# modules.
+# Also, instead of adding all the libraries/includes to LOOKUP_INCLUDE and
+# LOOKUP_LIBS, add them to the respective LOOKUP_*_INCLUDE and LOOKUP_*_LIBS
+# (where * is the name as given here in this list). That ensures that only
+# the dynamic library and not the exim binary will be linked against the
+# library.
+# NOTE: LDAP cannot be built as a module!
 
 LOOKUP_DBM=yes
 LOOKUP_LSEARCH=yes