Add port of libspng-0.4.3

Fixes #148.

lib/import/import-libspng.mk

@@ -0,0 +1,2 @@
+LIBSPNG_PORT_DIR := $(call select_from_ports,libspng)
+INC_DIR += $(LIBSPNG_PORT_DIR)/include/spng

lib/mk/libspng.mk

@@ -0,0 +1,13 @@
+include $(REP_DIR)/lib/import/import-libspng.mk
+
+LIBSPNG_SRC_DIR := $(LIBSPNG_PORT_DIR)/src/lib/libspng/src
+
+SRC_C := common.c decode.c
+
+LIBS += libc zlib
+
+vpath %.c $(LIBSPNG_SRC_DIR)
+
+SHARED_LIB := yes
+
+CC_CXX_WARN_STRICT :=

lib/symbols/libspng

@@ -0,0 +1,46 @@
+spng_ctx_free T
+spng_ctx_new T
+spng_ctx_new2 T
+spng_decode_image T
+spng_decoded_image_size T
+spng_get_bkgd T
+spng_get_chrm T
+spng_get_chrm_int T
+spng_get_exif T
+spng_get_gama T
+spng_get_hist T
+spng_get_iccp T
+spng_get_ihdr T
+spng_get_image_limits T
+spng_get_offs T
+spng_get_phys T
+spng_get_plte T
+spng_get_sbit T
+spng_get_splt T
+spng_get_srgb T
+spng_get_text T
+spng_get_time T
+spng_get_trns T
+spng_set_bkgd T
+spng_set_chrm T
+spng_set_chrm_int T
+spng_set_crc_action T
+spng_set_exif T
+spng_set_gama T
+spng_set_hist T
+spng_set_iccp T
+spng_set_ihdr T
+spng_set_image_limits T
+spng_set_offs T
+spng_set_phys T
+spng_set_plte T
+spng_set_png_buffer T
+spng_set_png_stream T
+spng_set_sbit T
+spng_set_splt T
+spng_set_srgb T
+spng_set_text T
+spng_set_time T
+spng_set_trns T
+spng_strerror T
+spng_version_string T

ports/libspng.hash

@@ -0,0 +1 @@
+3f3663502230adaf8729b8acdb3a8540cc40d098

ports/libspng.port

@@ -0,0 +1,11 @@
+LICENSE   := BSD-2-Clause
+VERSION   := 0.4.3
+DOWNLOADS := libspng.archive
+
+BASE_URL := https://gitlab.com/randy408/libspng/-/archive
+URL(libspng) := $(BASE_URL)/v$(VERSION)/libspng-v$(VERSION).tar.gz
+SHA(libspng) := bc0046f7798d30f8aa061b157808b4acdb734f1f81154879f3b98c49136c1516
+DIR(libspng) := src/lib/libspng
+
+DIRS := include/libspng
+DIR_CONTENT(include/libspng) := src/lib/libspng/src/spng.h

recipes/api/libspng/content.mk

@@ -0,0 +1,13 @@
+content: include/libspng lib/symbols/libspng LICENSE
+
+PORT_DIR := $(call port_dir,$(REP_DIR)/ports/libspng)
+
+include/libspng:
+	mkdir -p $@
+	cp -r $(PORT_DIR)/$@/* $@
+
+lib/symbols/libspng:
+	$(mirror_from_rep_dir)
+
+LICENSE:
+	cp $(PORT_DIR)/src/lib/libspng/LICENSE $@

recipes/api/libspng/hash

@@ -0,0 +1 @@
+2019-02-04 87ce6cc5e0d0692163c7efa1a6a30fc4160b704b

recipes/src/libspng/api

@@ -0,0 +1 @@
+libspng

recipes/src/libspng/content.mk

@@ -0,0 +1,16 @@
+MIRROR_FROM_REP_DIR = lib/import/import-libspng.mk lib/mk/libspng.mk
+
+content: $(MIRROR_FROM_REP_DIR) src/lib/libspng/target.mk LICENSE
+
+$(MIRROR_FROM_REP_DIR):
+	$(mirror_from_rep_dir)
+
+PORT_DIR := $(call port_dir,$(REP_DIR)/ports/libspng)
+
+src/lib/libspng/target.mk:
+	mkdir -p src/lib/libspng
+	cp -r $(PORT_DIR)/src/lib/libspng/* src/lib/libspng
+	echo "LIBS := libspng" > $@
+
+LICENSE:
+	cp $(PORT_DIR)/src/lib/libspng/LICENSE $@

recipes/src/libspng/hash

@@ -0,0 +1 @@
+2019-02-04 444da905d43b075de9db80f0862991c61268332a

recipes/src/libspng/used_apis

@@ -0,0 +1,3 @@
+base
+libc
+zlib

src/test/libspng/target.mk

@@ -0,0 +1,11 @@
+TARGET := test-libspng
+SRC_C  := example.c
+LIBS   := libc libspng posix
+
+LIBSPNG_DIR := $(call select_from_ports,libspng)
+
+INC_DIR += $(LIBSPNG_DIR)/include/libspng
+
+LIBSPNG_SRC_DIR := $(LIBSPNG_DIR)/src/lib/libspng
+
+vpath %.c $(LIBSPNG_SRC_DIR)/examples