Fixes for emscripten

cmake/compiler-env.cmake

@@ -23,6 +23,8 @@ set(CMAKE_POLICY_DEFAULT_CMP0069 NEW)
 
 set(CMAKE_POSITION_INDEPENDENT_CODE ON)
 
+##########################################
+
 if(NOT CMAKE_SYSTEM_NAME MATCHES "Emscripten")
   set(CMAKE_INTERPROCEDURAL_OPTIMIZATION ON)
 endif()
@@ -49,6 +51,9 @@ if(UNIX)
   momo_add_c_and_cxx_compile_options(
     -fvisibility=hidden
     -ftrivial-auto-var-init=zero
+    #-Wbad-function-cast
+    #-Wcast-function-type
+    -Wno-int-conversion
   )
 endif()
 
@@ -86,6 +91,22 @@ endif()
 
 ##########################################
 
+if(CMAKE_SYSTEM_NAME MATCHES "Emscripten")
+  add_link_options(
+    -sALLOW_MEMORY_GROWTH=1
+    -sASSERTIONS
+    -sWASM_BIGINT
+    -sENVIRONMENT=web
+    -sUSE_OFFSET_CONVERTER
+    -sEXCEPTION_CATCHING_ALLOWED=[..]
+    -sEXIT_RUNTIME
+    #-lnodefs.js -sNODERAWFS=1
+    #-sASYNCIFY
+)
+endif()
+
+##########################################
+
 if(MSVC)
   string(REPLACE "/EHsc" "" CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS}")
   string(REPLACE "/EHs" "" CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS}")