Examples: Emscripten: Tweaks for size. (#2494)

examples/.gitignore

@@ -25,6 +25,7 @@ project.xcworkspace
 xcuserdata
 
 ## Emscripten output
+*.o.tmp
 *.out.js
 *.out.wasm
 example_emscripten/example_emscripten.*

examples/example_emscripten/Makefile

@@ -24,10 +24,12 @@ UNAME_S := $(shell uname -s)
 EMS = -s USE_SDL=2 -s WASM=1
 EMS += -s ALLOW_MEMORY_GROWTH=1 -s BINARYEN_TRAP_MODE=clamp
 EMS += -s DISABLE_EXCEPTION_CATCHING=1 -s NO_EXIT_RUNTIME=0
-EMS += -s ASSERTIONS=1 -s SAFE_HEAP=1
+EMS += -s ASSERTIONS=1 -s NO_FILESYSTEM=1
+#EMS += -s SAFE_HEAP=1    ## Adds overhead
 
 CPPFLAGS = -I../ -I../../
-CPPFLAGS += -g -Wall -Wformat -O3
+#CPPFLAGS += -g
+CPPFLAGS += -Wall -Wformat -Os
 CPPFLAGS += $(EMS)
 LIBS = $(EMS)
 LDFLAGS = --shell-file shell_minimal.html

examples/example_emscripten/main.cpp

@@ -63,6 +63,10 @@ int main(int, char**)
     ImGuiIO& io = ImGui::GetIO(); (void)io;
     //io.ConfigFlags |= ImGuiConfigFlags_NavEnableKeyboard;  // Enable Keyboard Controls
 
+    // For an Emscripten build we are disabling file-system access, so let's not attempt to do a fopen() of the imgui.ini file.
+    // You may manually call LoadIniSettingsFromMemory() to load settings from your own storage.
+    io.IniFilename = NULL;
+
     // Setup Dear ImGui style
     ImGui::StyleColorsDark();
     //ImGui::StyleColorsClassic();