Fix minor issues running on linux.

CMakeLists.txt

@@ -21,6 +21,9 @@ set(CMAKE_SHARED_LIBRARY_LINK_CXX_FLAGS "")
 set(CMAKE_CXX_STANDARD 20)
 set(CMAKE_CXX_STANDARD_REQUIRED True)
 
+# CMAKE dependencies
+find_package(Threads REQUIRED)
+
 add_compile_options(
     # gcc and clang: debugging symbols
     "$<$<CXX_COMPILER_ID:AppleClang,Clang,GNU>:-g>" 
@@ -53,9 +56,6 @@ add_compile_options(
 
     # windows: mingw and msys; use ANSI compatible printf, workaround a gcc bug.
     "$<$<PLATFORM_ID:Windows>:-D__USE_MINGW_ANSI_STDIO>"
-
-    # all systems and compilers: link threading library
-    "-pthread"
 )
 
 # ******************************************
@@ -94,6 +94,7 @@ add_executable(purpuri)
 target_sources(purpuri PRIVATE ${vm_src})
 set_target_properties(purpuri PROPERTIES ENABLE_EXPORTS ON)
 target_compile_definitions(purpuri PRIVATE VM_BUILDING)
+target_link_libraries(purpuri PRIVATE Threads::Threads)
 
 # Linux needs to compile against -ldl
 if (UNIX)

source/vm/ClassHeap.cpp

@@ -89,7 +89,7 @@ Class* ClassHeap::GetClass(const std::string& Name) {
  * These locations are searched in that order when trying to load classes.
  */
 void ClassHeap::AddToClassPath(std::string path) {
-    ClassPath.emplace_back(path.append("\\"));
+    ClassPath.emplace_back(path + std::filesystem::path::preferred_separator);
 }
 
 /**

source/vm/EntryPoint.cpp

@@ -19,7 +19,7 @@
  * @param Name the name of the Purpuri executable.
  */
 void DisplayUsage(char* Name) {
-    fprintf(stderr, "Purpuri VM v1.6 - Gemwire Institute\n");
+    fprintf(stderr, "Purpuri VM v1.7a - Gemwire Institute\n");
     fprintf(stderr, "***************************************\n");
     fprintf(stderr, "Usage: %s <class file>\n", Name);
     #ifdef VISUAL_DEBUGGER