1 files changed, 81 insertions, 0 deletions
diff --git a/make/lazy_configure.mk b/make/lazy_configure.mk
new file mode 100644
index 0000000000..320f485d90
--- /dev/null
+++ b/make/lazy_configure.mk
@@ -0,0 +1,81 @@
+# ``The contents of this file are subject to the Erlang Public License,
+# Version 1.1, (the "License"); you may not use this file except in
+# compliance with the License. You should have received a copy of the
+# Erlang Public License along with this software. If not, it can be
+# retrieved via the world wide web at http://www.erlang.org/.
+# 
+# Software distributed under the License is distributed on an "AS IS"
+# basis, WITHOUT WARRANTY OF ANY KIND, either express or implied. See
+# the License for the specific language governing rights and limitations
+# under the License.
+# 
+# The Initial Developer of the Original Code is Ericsson Utvecklings AB.
+# Portions created by Ericsson are Copyright 1999, Ericsson Utvecklings
+# AB. All Rights Reserved.''
+# 
+#     $Id$
+#
+
+ifndef EXPECTED_AUTOCONF_VERSION
+EXPECTED_AUTOCONF_VERSION=2.59
+endif
+SAVE_ARGS=$(ERL_TOP)/make/save_args
+CONFIG_STATUS=$(CONFIGURE_DIR)/$(TARGET)/config.status
+SAVED_CONFIG_FLAGS_FILE=$(CONFIGURE_DIR)/$(TARGET)/lazy.config.flags
+SAVED_CONFIG_LOG=$(CONFIGURE_DIR)/$(TARGET)/config.log
+CONFIG_CACHE_FILE=$(CONFIGURE_DIR)/$(TARGET)/lazy.config.cache
+ALL_CONFIG_FLAGS=$(CONFIGURE_FLAGS) --no-create --no-recursion --cache-file=$(CONFIG_CACHE_FILE)
+
+lazy_configure: save_config_flags $(CONFIG_STATUS)
+	rm -f $(CONFIGURE_DIR)/config.log
+	cd $(CONFIGURE_DIR) && $(CONFIG_STATUS)
+	cat $(CONFIGURE_DIR)/config.log >> $(SAVED_CONFIG_LOG)
+	rm -f $(CONFIGURE_DIR)/config.log
+
+save_config_flags:
+	$(SAVE_ARGS) $(SAVED_CONFIG_FLAGS_FILE) --- $(ALL_CONFIG_FLAGS)
+
+$(SAVED_CONFIG_FLAGS_FILE): save_config_flags
+
+$(CONFIGURE_DIR)/configure: $(CONFIGURE_DIR)/configure.in $(EXTRA_CONFIGURE_DEPENDENCIES)
+	rm -f $(CONFIG_CACHE_FILE)
+	@ exp_ac_vsn=$(EXPECTED_AUTOCONF_VERSION) ;                                \
+	ac_vsn_blob=`autoconf --version` ;                                         \
+	ac_vsn=`echo x$$ac_vsn_blob | sed "s|[^0-9]*\([0-9][^ \t\n]*\).*|\1|"` ;   \
+	case "$$ac_vsn" in                                                         \
+	    $$exp_ac_vsn)                                                          \
+		;;                                                                 \
+	    *)                                                                     \
+		echo "***************************************************"  1>&2 ; \
+		echo "***************************************************"  1>&2 ; \
+		echo "*** WARNING: System might fail to configure or"       1>&2 ; \
+		echo "***          might be erroneously configured"         1>&2 ; \
+		echo "***          since autoconf version $$ac_vsn is used" 1>&2 ; \
+		echo "***          instead of version $$exp_ac_vsn!"        1>&2 ; \
+		echo "***************************************************"  1>&2 ; \
+		echo "***************************************************"  1>&2 ; \
+		;;                                                                 \
+	esac
+	cd $(CONFIGURE_DIR) && autoconf -f
+
+$(CONFIGURE_DIR)/config.h.in: $(CONFIGURE_DIR)/configure.in $(CONFIGURE_DIR)/aclocal.m4
+	cd $(CONFIGURE_DIR) && autoheader ./configure.in > ./config.h.in
+
+$(CONFIG_STATUS): $(SAVED_CONFIG_FLAGS_FILE) $(CONFIGURE_DIR)/configure $(EXTRA_CONFIG_STATUS_DEPENDENCIES)
+	rm -f $(CONFIGURE_DIR)/config.log
+	cd $(CONFIGURE_DIR) && CONFIG_STATUS=$(CONFIG_STATUS) ./configure $(ALL_CONFIG_FLAGS)
+	rm -f $(SAVED_CONFIG_LOG)
+	mv $(CONFIGURE_DIR)/config.log $(SAVED_CONFIG_LOG)
+
+lazy_configure_target_clean:
+	rm -f $(CONFIG_STATUS)
+	rm -f $(CONFIG_CACHE_FILE)
+	rm -f $(SAVED_CONFIG_FLAGS_FILE)
+	rm -f $(SAVED_CONFIG_LOG)
+
+lazy_configure_clean: lazy_configure_target_clean
+	rm -f $(CONFIGURE_DIR)/configure
+	test ! -f $(CONFIGURE_DIR)/acconfig.h || rm -f $(CONFIGURE_DIR)/config.h.in
+
+.PHONY: lazy_configure save_config_flags lazy_configure_clean
+