From 05a54749cb3dede03d56d6c6e9deb643c9b05ad6 Mon Sep 17 00:00:00 2001
From: Bui Quang Huy <34532913+LazyYuuki@users.noreply.github.com>
Date: Tue, 15 Apr 2025 22:40:37 +0800
Subject: [PATCH] Allow to be built to WebAssembly using emscripten

- Add emscripten option to use -lm instead of LibM library
---
 src/CMakeLists.txt | 11 ++++++++---
 1 file changed, 8 insertions(+), 3 deletions(-)

diff --git a/src/CMakeLists.txt b/src/CMakeLists.txt
index 1407080..b4dea44 100644
--- a/src/CMakeLists.txt
+++ b/src/CMakeLists.txt
@@ -49,9 +49,14 @@ target_include_directories(ccd PUBLIC
   $<BUILD_INTERFACE:${CMAKE_CURRENT_BINARY_DIR}>)
 
 if(NOT WIN32)
-  find_library(LIBM_LIBRARY NAMES m)
-  if(NOT LIBM_LIBRARY)
-    message(FATAL_ERROR "Could NOT find required library LibM")
+  if (EMSCRIPTEN)
+    set(LIBM_LIBRARY "-lm")
+    message("Subtitute LibM with emscripten -lm")
+  else()
+    find_library(LIBM_LIBRARY NAMES m)
+    if(NOT LIBM_LIBRARY)
+      message(FATAL_ERROR "Could NOT find required library LibM")
+    endif()
   endif()
   target_link_libraries(ccd "${LIBM_LIBRARY}")
   if(BUILD_SHARED_LIBS)