Radix cross Linux 3pp sources

#
# Following command helps to cheate SUBDIRS list:
# $ tree -fid .
#

SUBDIRS := SPIRV-Cross-sdk             \
           SPIRV-Headers-sdk           \
           SPIRV-LLVM-Translator       \
           SPIRV-Reflect-sdk           \
           SPIRV-Tools-sdk             \
           Vulkan-Docs                 \
           Vulkan-ExtensionLayer-sdk   \
           Vulkan-Headers-sdk          \
           Vulkan-Loader-sdk           \
           Vulkan-LunarG-Tools-sdk     \
           Vulkan-Tools-sdk            \
           Vulkan-ValidationLayers-sdk \
           gfxreconstruct              \
           glslang


all-recursive downloads_clean-recursive:
	@set fnord $(MAKEFLAGS); amf=$$2; \
	target=`echo $@ | sed s/-recursive//`; \
	list='$(SUBDIRS)'; for subdir in $$list; do \
	  echo "Making $$target in $$subdir"; \
	  local_target="$$target"; \
	  (cd $$subdir && $(MAKE) $$fnord $$local_target) \
	   || case "$$amf" in *=*) exit 1;; *k*) fail=yes;; *) exit 1;; esac; \
	done; test -z "$$fail"

all: all-recursive

downloads_clean: downloads_clean-recursive

.PHONY: all-recursive downloads_clean-recursive all downloads_clean