LOCAL_PATH := $(call my-dir)
include $(CLEAR_AUTOTOOLS_VARS)

LANGINFO_DIR := $(shell mktemp -d)

.PHONY: generate-langinfo regen-aclocal

# regenerate autotools files with our tool's versions
regen-aclocal: PRIVATE_LOCAL_PATH := $(LOCAL_PATH)
regen-aclocal:
	cd $(PRIVATE_LOCAL_PATH) && autoreconf -ivf

# langinfo does not present in Android.
# Create a faik header to build libedit
generate-langinfo:
	echo "/* Hack to build "libedit". */" > $(LANGINFO_DIR)/langinfo.h
	echo "#define CODESET 1" >> $(LANGINFO_DIR)/langinfo.h
	echo '#define nl_langinfo(i) ((i == CODESET) ? (char*) "UTF-8" : NULL)' >> $(LANGINFO_DIR)/langinfo.h

# $(1): autotools build dir
# $(2): output dir for module
# $(3): install dir for module
# $(4): export_includes file
# $(5): export_pkgconfig file
define libedit_cb
	cd $(1)/out/system/include && \
	ln -sf editline readline && \
	ln -sf ../histedit.h readline/history.h
	cd $(2) && \
	ln -sf libedit.so libreadline.so && \
	ln -sf libedit.so libedit.so.0
	cd $(3) && \
	ln -sf libedit.so libreadline.so && \
	ln -sf libedit.so libedit.so.0
endef

LOCAL_MODULE := libedit
LOCAL_SHARED_LIBRARIES := libncurses
LOCAL_ADDITIONAL_DEPENDENCIES := generate-langinfo regen-aclocal
LOCAL_CFLAGS := -D__STDC_ISO_10646__=201103L -I $(LANGINFO_DIR)
# clean up everything which we created before
LOCAL_POST_INSTALL_CMD := rm -f $(LANGINFO_DIR)/* && rmdir $(LANGINFO_DIR)
# create a symlink:  system/include/editline -> system/include/readline
LOCAL_AUTOTOOLS_POST_INSTALL_CALLBACK := libedit_cb

include $(BUILD_AUTOTOOLS_SHARED_LIBRARY)