(C++ modules support) fix stdmodules_deps test for gcc as it doesn't implement private module fragment atm

Author: Arthapz

tests/projects/c++/modules/stdmodules_deps/src/bar.mpp

@@ -4,8 +4,11 @@ import std;
 
 export auto my_sum2(std::size_t a, std::size_t b) -> std::size_t;
 
+#if defined(__GNUC__) && !defined(__clang__)
+inline
+#else
 module :private;
-
-auto my_sum2(std::size_t a, std::size_t b) -> std::size_t {
+#endif
+    auto my_sum2(std::size_t a, std::size_t b) -> std::size_t {
   return a + a + b + b;
 }

tests/projects/c++/modules/stdmodules_deps/src/foo.cpp

@@ -0,0 +1,3 @@
+module foo;
+
+auto my_sum(std::size_t a, std::size_t b) -> std::size_t { return a + b; }

tests/projects/c++/modules/stdmodules_deps/src/foo.mpp

@@ -3,9 +3,3 @@ export module foo;
 import std;
 
 export auto my_sum(std::size_t a, std::size_t b) -> std::size_t;
-
-module :private;
-
-auto my_sum(std::size_t a, std::size_t b) -> std::size_t {
-  return a + b;
-}

tests/projects/c++/modules/stdmodules_deps/xmake.lua

@@ -3,6 +3,7 @@ set_languages("c++latest")
 
 target("foo")
     set_kind("static")
+    add_files("src/foo.cpp")
     add_files("src/foo.mpp", {public = true})
 
 target("bar")