From 4433e80fe4e1abb995dc282ec031337613aceb05 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Maciej=20Kacper=20Jagie=C5=82=C5=82o?= <maciej@jagiello.it>
Date: Sat, 16 May 2020 17:28:17 +0200
Subject: [PATCH] Enable building the encoder with Enscripten to WebAssebly as
 a Nodejs cli tool.

---
 CMakeLists.txt      | 32 +++++++++++++++++++-------------
 build_emscripten.sh |  9 +++++++++
 2 files changed, 28 insertions(+), 13 deletions(-)
 create mode 100755 build_emscripten.sh

diff --git a/CMakeLists.txt b/CMakeLists.txt
index 8f63db7..0ff16e2 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -33,7 +33,12 @@ if (NOT MSVC)
 	  set(GCC_COMPILE_FLAGS "${GCC_COMPILE_FLAGS} -m32")
    endif()
 
-   if (STATIC)
+   if (EMSCRIPTEN)
+	  set(CMAKE_C_FLAGS  "${CMAKE_C_FLAGS} -s ALLOW_MEMORY_GROWTH=1")
+	  set(CMAKE_CXX_FLAGS  "${CMAKE_CXX_FLAGS} -s ALLOW_MEMORY_GROWTH=1")
+
+	  set(CMAKE_EXE_LINKER_FLAGS  "${CMAKE_EXE_LINKER_FLAGS} ${GCC_LINK_FLAGS}")
+   elseif (STATIC)
 	  set(CMAKE_EXE_LINKER_FLAGS  "${CMAKE_EXE_LINKER_FLAGS} ${GCC_LINK_FLAGS} -static-libgcc -static-libstdc++ -static")
    else()
 	  set(CMAKE_EXE_LINKER_FLAGS  "${CMAKE_EXE_LINKER_FLAGS} ${GCC_LINK_FLAGS} -Wl,-rpath .")
@@ -85,15 +90,16 @@ if (NOT MSVC)
    target_link_libraries(basisu m pthread)
 endif()
 
-install(TARGETS basisu DESTINATION bin)
-
-if (UNIX)
-   if (CMAKE_BUILD_TYPE STREQUAL Release)
-       if (APPLE)
-	      add_custom_command(TARGET basisu POST_BUILD COMMAND strip -X -x ${CMAKE_RUNTIME_OUTPUT_DIRECTORY}/basisu)
-       else()
-           add_custom_command(TARGET basisu POST_BUILD COMMAND strip -g -X -x ${CMAKE_RUNTIME_OUTPUT_DIRECTORY}/basisu)
-       endif()
-   endif()
-endif()
-
+if (NOT EMSCRIPTEN)
+	install(TARGETS basisu DESTINATION bin)
+	
+	if (UNIX)
+		if (CMAKE_BUILD_TYPE STREQUAL Release)
+			if (APPLE)
+				add_custom_command(TARGET basisu POST_BUILD COMMAND strip -X -x ${CMAKE_RUNTIME_OUTPUT_DIRECTORY}/basisu)
+			else()
+				add_custom_command(TARGET basisu POST_BUILD COMMAND strip -g -X -x ${CMAKE_RUNTIME_OUTPUT_DIRECTORY}/basisu)
+			endif()
+		endif()
+	endif()
+endif()
\ No newline at end of file
diff --git a/build_emscripten.sh b/build_emscripten.sh
new file mode 100755
index 0000000..274f539
--- /dev/null
+++ b/build_emscripten.sh
@@ -0,0 +1,9 @@
+#!/bin/sh
+if ! emcc --version
+then
+	echo "Emscripten not found on PATH. Please follow instructions on https://emscripten.org/docs/getting_started/downloads.html"
+	exit
+fi
+
+emcmake cmake .
+emcmake make
\ No newline at end of file