Bumped versions of Emscripten and Cmake.

Also do more test runs to build a more comprehensive set of system libs.

Author: LTLA

Dockerfile

@@ -1,16 +1,16 @@
 FROM ubuntu:latest
 
 RUN apt-get update && \
-    apt-get install -y git wget make python3 xz-utils lbzip2
+    apt-get install -y git wget make python3 xz-utils lbzip2 libatomic1
 
 # Grabbing Emscripten. 
 RUN git clone https://github.com/emscripten-core/emsdk.git && \
     cd emsdk && \
-    ./emsdk install 3.1.68 && \
-    ./emsdk activate 3.1.68
+    ./emsdk install 4.0.20 && \
+    ./emsdk activate 4.0.20
 
 # Grabbing CMake.
-RUN wget https://github.com/Kitware/CMake/releases/download/v3.30.4/cmake-3.30.4-linux-x86_64.sh -O cmake_install.sh && \
+RUN wget https://github.com/Kitware/CMake/releases/download/v4.2.0/cmake-4.2.0-linux-x86_64.sh -O cmake_install.sh && \
     mkdir cmake && \
     bash cmake_install.sh --prefix=cmake --skip-license && \
     rm cmake_install.sh
@@ -20,8 +20,15 @@ ENV PATH="/emsdk:/emsdk/upstream/emscripten:/cmake/bin:${PATH}"
 # Prebuilding system libraries so that we don't have to do it again in each use case.
 RUN mkdir test-bar && \
     touch test-bar/foo.c && \
+    touch test-bar/foo.cpp && \
     cd test-bar && \
-    /emsdk/upstream/emscripten/emcc --use-port=zlib -pthread --bind foo.c -o alpha && \
-    /emsdk/upstream/emscripten/emcc --use-port=zlib -pthread --bind -O3 foo.c -o bravo && \
+    /emsdk/upstream/emscripten/emcc --use-port=zlib -pthread --bind foo.c -o bar && \
+    /emsdk/upstream/emscripten/emcc --use-port=zlib -pthread --bind -O3 foo.c -o bar && \
+    /emsdk/upstream/emscripten/emcc --use-port=zlib -pthread -sMEMORY64 --bind foo.c -o bar && \
+    /emsdk/upstream/emscripten/emcc --use-port=zlib -pthread -sMEMORY64 --bind -O3 foo.c -o bar && \
+    /emsdk/upstream/emscripten/em++ --use-port=zlib -pthread --bind foo.c -o bar && \
+    /emsdk/upstream/emscripten/em++ --use-port=zlib -pthread --bind -O3 foo.cpp -o bar && \
+    /emsdk/upstream/emscripten/em++ --use-port=zlib -pthread -sMEMORY64 --bind foo.cpp -o bar && \
+    /emsdk/upstream/emscripten/em++ --use-port=zlib -pthread -sMEMORY64 --bind -O3 foo.cpp -o bar && \
     cd ../ && \
     rm -rf test-bar