--- /dev/null
+################################################################################
+#
+# exim
+#
+################################################################################
+
+EXIM_VERSION = 4.85
+EXIM_SOURCE = exim-$(EXIM_VERSION).tar.bz2
+EXIM_SITE = ftp://ftp.exim.org/pub/exim/exim4
+EXIM_LICENSE = GPLv2+
+EXIM_LICENSE_FILES = LICENCE
+EXIM_DEPENDENCIES = pcre berkeleydb host-pkgconf
+
+# Modify a variable value. It must already exist in the file, either
+# commented or not.
+define exim-config-change # variable-name, variable-value
+ $(SED) 's,^[#[:space:]]*$1[[:space:]]*=.*$$,$1=$2,' \
+ $(@D)/Local/Makefile
+endef
+
+# Comment-out a variable. Has no effect if it does not exits.
+define exim-config-unset # variable-name
+ $(SED) 's,^\([[:space:]]*$1[[:space:]]*=.*$$\),# \1,' \
+ $(@D)/Local/Makefile
+endef
+
+# Add a variable definition. It must not already exist in the file,
+# otherwise it would be defined twice with potentially different values.
+define exim-config-add # variable-name, variable-value
+ echo "$1=$2" >>$(@D)/Local/Makefile
+endef
+
+define EXIM_USE_CUSTOM_CONFIG_FILE
+ $(INSTALL) -m 0644 $(BR2_PACKAGE_EXIM_CUSTOM_CONFIG_FILE) \
+ $(@D)/Local/Makefile
+endef
+
+define EXIM_USE_DEFAULT_CONFIG_FILE
+ $(INSTALL) -m 0644 $(@D)/src/EDITME $(@D)/Local/Makefile
+ $(call exim-config-change,BIN_DIRECTORY,/usr/sbin)
+ $(call exim-config-change,CONFIGURE_FILE,/etc/exim/configure)
+ $(call exim-config-change,EXIM_USER,ref:exim)
+ $(call exim-config-change,EXIM_GROUP,mail)
+ $(call exim-config-change,TRANSPORT_LMTP,yes)
+ $(call exim-config-change,PCRE_LIBS,-lpcre)
+ $(call exim-config-change,PCRE_CONFIG,no)
+ $(call exim-config-change,HAVE_ICONV,no)
+ $(call exim-config-unset,EXIM_MONITOR)
+ $(call exim-config-change,AUTH_PLAINTEXT,yes)
+ $(call exim-config-change,AUTH_CRAM_MD5,yes)
+endef
+
+ifeq ($(BR2_PACKAGE_DOVECOT),y)
+EXIM_DEPENDENCIES += dovecot
+define EXIM_USE_DEFAULT_CONFIG_FILE_DOVECOT
+ $(call exim-config-change,AUTH_DOVECOT,yes)
+endef
+endif
+
+ifeq ($(BR2_PACKAGE_CLAMAV),y)
+EXIM_DEPENDENCIES += clamav
+define EXIM_USE_DEFAULT_CONFIG_FILE_CLAMAV
+ $(call exim-config-change,WITH_CONTENT_SCAN,yes)
+endef
+endif
+
+ifeq ($(BR2_PACKAGE_OPENSSL),y)
+EXIM_DEPENDENCIES += openssl
+define EXIM_USE_DEFAULT_CONFIG_FILE_OPENSSL
+ $(call exim-config-change,SUPPORT_TLS,yes)
+ $(call exim-config-change,USE_OPENSSL_PC,openssl)
+endef
+endif
+
+define EXIM_CONFIGURE_TOOLCHAIN
+ $(call exim-config-add,CC,$(TARGET_CC))
+ $(call exim-config-add,CFLAGS,$(TARGET_CFLAGS))
+ $(call exim-config-add,AR,$(TARGET_AR) cq)
+ $(call exim-config-add,RANLIB,$(TARGET_RANLIB))
+ $(call exim-config-add,HOSTCC,$(HOSTCC))
+ $(call exim-config-add,HOSTCFLAGS,$(HOSTCFLAGS))
+ $(EXIM_REMOVE_LIBNSL_FROM_MAKEFILE)
+endef
+
+ifneq ($(call qstrip,$(BR2_PACKAGE_EXIM_CUSTOM_CONFIG_FILE)),)
+define EXIM_CONFIGURE_CMDS
+ $(EXIM_USE_CUSTOM_CONFIG_FILE)
+ $(EXIM_CONFIGURE_TOOLCHAIN)
+endef
+else # CUSTOM_CONFIG
+define EXIM_CONFIGURE_CMDS
+ $(EXIM_USE_DEFAULT_CONFIG_FILE)
+ $(EXIM_USE_DEFAULT_CONFIG_FILE_DOVECOT)
+ $(EXIM_USE_DEFAULT_CONFIG_FILE_CLAMAV)
+ $(EXIM_USE_DEFAULT_CONFIG_FILE_OPENSSL)
+ $(EXIM_CONFIGURE_TOOLCHAIN)
+endef
+endif # CUSTOM_CONFIG
+
+# exim needs a bit of love to build statically
+ifeq ($(BR2_STATIC_LIBS),y)
+EXIM_STATIC_FLAGS = LFLAGS="-pthread --static"
+endif
+
+# "The -j (parallel) flag must not be used with make"
+# (http://www.exim.org/exim-html-current/doc/html/spec_html/ch04.html)
+define EXIM_BUILD_CMDS
+ $(TARGET_MAKE_ENV) build=br $(MAKE1) -C $(@D) $(EXIM_STATIC_FLAGS)
+endef
+
+# Need to replicate the LFLAGS in install, as exim still wants to build
+# something when installing...
+define EXIM_INSTALL_TARGET_CMDS
+ DESTDIR=$(TARGET_DIR) INSTALL_ARG="-no_chown -no_symlink" build=br \
+ $(MAKE1) -C $(@D) $(EXIM_STATIC_FLAGS) install
+ chmod u+s $(TARGET_DIR)/usr/sbin/exim
+endef
+
+define EXIM_USERS
+ exim 88 mail 8 * - - - exim
+endef
+
+define EXIM_INSTALL_INIT_SYSV
+ $(INSTALL) -D -m 755 package/exim/S86exim \
+ $(TARGET_DIR)/etc/init.d/S86exim
+endef
+
+$(eval $(generic-package))