From f8e2ea2b1a7a2a002a595e96fc7c5e1e10fc3128 Mon Sep 17 00:00:00 2001
From: Vijai Kumar S <2363451+vijaiaeroastro@users.noreply.github.com>
Date: Sun, 20 Oct 2024 13:08:14 +0200
Subject: [PATCH] Emscripten build works and produces a static library

---
 CMakeLists.txt             | 22 ++++++++++++++++++----
 emscripten_build_notes.txt |  3 +++
 2 files changed, 21 insertions(+), 4 deletions(-)
 create mode 100644 emscripten_build_notes.txt

diff --git a/CMakeLists.txt b/CMakeLists.txt
index fac4a8fc9..374773296 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -6,6 +6,13 @@ cmake_policy(SET CMP0048 NEW)
 
 set_property(GLOBAL PROPERTY USE_FOLDERS ON)
 
+if (CMAKE_SYSTEM_NAME STREQUAL "Emscripten")
+    set(CMAKE_CXX_COMPILER_WORKS TRUE)
+    set(CMAKE_C_COMPILER_WORKS TRUE)
+    set(CMAKE_TRY_COMPILE_TARGET_TYPE STATIC_LIBRARY)
+    set(VCPKG_TARGET_TRIPLET wasm32-emscripten)
+endif()
+
 # Automatically set the vcpkg toolchain file if vcpkg exists as a submodule
 if (EXISTS "${CMAKE_SOURCE_DIR}/vcpkg/scripts/buildsystems/vcpkg.cmake")
     message("Using VCPKG Toolchain")
@@ -116,10 +123,17 @@ endif()
 
 #########################################################
 # Shared library
-add_library(${PROJECT_NAME} SHARED ${SRCS_COMMON} ${HDRS_COMMON}
-  ${ACT_GENERATED_SOURCE}
-  ${VERSION_FILES_OUTPUTLOCATION}
-)
+if (CMAKE_SYSTEM_NAME STREQUAL "Emscripten")
+    add_library(${PROJECT_NAME} STATIC ${SRCS_COMMON} ${HDRS_COMMON}
+      ${ACT_GENERATED_SOURCE}
+      ${VERSION_FILES_OUTPUTLOCATION}
+    )
+else()
+    add_library(${PROJECT_NAME} SHARED ${SRCS_COMMON} ${HDRS_COMMON}
+            ${ACT_GENERATED_SOURCE}
+            ${VERSION_FILES_OUTPUTLOCATION}
+    )
+endif ()
 SOURCE_GROUP("Source Files\\Autogenerated" FILES ${ACT_GENERATED_SOURCE})
 
 
diff --git a/emscripten_build_notes.txt b/emscripten_build_notes.txt
new file mode 100644
index 000000000..7321f7fb9
--- /dev/null
+++ b/emscripten_build_notes.txt
@@ -0,0 +1,3 @@
+# Building a static library using emscripten compiler
+
+cmake .. -DCMAKE_SYSTEM_NAME=Emscripten
\ No newline at end of file