[PATCH 2/2] edid-decode: add build rule for emscripten output

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All I can really say is that this works in my current setup. This
current setup was not the first setup I tried, with lots of random
flailing around emscripten and binaryen versions to be compatible with
my LLVM version. Perhaps later emscripten needs slightly different flags
to export functions, who knows.

Signed-off-by: Ilia Mirkin <imirkin@xxxxxxxxxxxx>
---
 Makefile | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/Makefile b/Makefile
index 6db6386..49ad39b 100644
--- a/Makefile
+++ b/Makefile
@@ -1,6 +1,8 @@
 bindir ?= /usr/bin
 mandir ?= /usr/share/man
 
+EMXX ?= em++
+
 SOURCES = edid-decode.cpp parse-base-block.cpp parse-cta-block.cpp \
 	  parse-displayid-block.cpp parse-ls-ext-block.cpp \
 	  parse-di-ext-block.cpp parse-vtb-ext-block.cpp
@@ -13,6 +15,9 @@ sha = -DSHA=$(shell if [ -d .git ]; then git rev-parse HEAD ; else printf '"not
 edid-decode: $(SOURCES) edid-decode.h Makefile
 	$(CXX) $(CPPFLAGS) $(CFLAGS) $(LDFLAGS) $(WARN_FLAGS) -g $(sha) -o $@ $(SOURCES) -lm
 
+edid-decode.js: $(SOURCES) edid-decode.h Makefile
+	$(EMXX) $(CPPFLAGS) $(CFLAGS) $(LDFLAGS) $(WARN_FLAGS) $(sha) -s EXPORTED_FUNCTIONS='["_parse_edid"]' -s EXTRA_EXPORTED_RUNTIME_METHODS='["ccall", "cwrap"]' -o $@ $(SOURCES) -lm
+
 clean:
 	rm -f edid-decode
 
-- 
2.24.1




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