From af1a266670d040d2f4083ff309d732d648afba2a Mon Sep 17 00:00:00 2001
From: Angelos Mouzakitis <a.mouzakitis@virtualopensystems.com>
Date: Tue, 10 Oct 2023 14:33:42 +0000
Subject: Add submodule dependency files

Change-Id: Iaf8d18082d3991dec7c0ebbea540f092188eb4ec
---
 .../subprojects/cmMod/CMakeLists.txt               |  7 ++
 .../subprojects/cmMod/module/module.c              | 96 ++++++++++++++++++++++
 .../subprojects/cmMod/module/module.h              |  3 +
 3 files changed, 106 insertions(+)
 create mode 100644 meson/test cases/cmake/21 shared module/subprojects/cmMod/CMakeLists.txt
 create mode 100644 meson/test cases/cmake/21 shared module/subprojects/cmMod/module/module.c
 create mode 100644 meson/test cases/cmake/21 shared module/subprojects/cmMod/module/module.h

(limited to 'meson/test cases/cmake/21 shared module/subprojects')

diff --git a/meson/test cases/cmake/21 shared module/subprojects/cmMod/CMakeLists.txt b/meson/test cases/cmake/21 shared module/subprojects/cmMod/CMakeLists.txt
new file mode 100644
index 000000000..d2fcfe3ff
--- /dev/null
+++ b/meson/test cases/cmake/21 shared module/subprojects/cmMod/CMakeLists.txt	
@@ -0,0 +1,7 @@
+cmake_minimum_required(VERSION 3.5)
+
+project(cmModule)
+
+include_directories("${CMAKE_CURRENT_SOURCE_DIR}/module")
+
+add_library(myMod MODULE "${CMAKE_CURRENT_SOURCE_DIR}/module/module.c")
diff --git a/meson/test cases/cmake/21 shared module/subprojects/cmMod/module/module.c b/meson/test cases/cmake/21 shared module/subprojects/cmMod/module/module.c
new file mode 100644
index 000000000..5dd26d7ef
--- /dev/null
+++ b/meson/test cases/cmake/21 shared module/subprojects/cmMod/module/module.c	
@@ -0,0 +1,96 @@
+#if defined _WIN32 || defined __CYGWIN__
+  #define DLL_PUBLIC __declspec(dllexport)
+#else
+  #if defined __GNUC__
+    #define DLL_PUBLIC __attribute__ ((visibility("default")))
+  #else
+    #pragma message ("Compiler does not support symbol visibility.")
+    #define DLL_PUBLIC
+  #endif
+#endif
+
+#if defined(_WIN32) || defined(__CYGWIN__)
+
+#include <stdio.h>
+
+typedef int (*fptr) (void);
+
+#ifdef __CYGWIN__
+
+#include <dlfcn.h>
+
+fptr find_any_f (const char *name) {
+    return (fptr) dlsym(RTLD_DEFAULT, name);
+}
+#else /* _WIN32 */
+
+#include <windows.h>
+#include <tlhelp32.h>
+
+static wchar_t*
+win32_get_last_error (void)
+{
+    wchar_t *msg = NULL;
+
+    FormatMessageW (FORMAT_MESSAGE_ALLOCATE_BUFFER
+                    | FORMAT_MESSAGE_IGNORE_INSERTS
+                    | FORMAT_MESSAGE_FROM_SYSTEM,
+                    NULL, GetLastError (), 0,
+                    (LPWSTR) &msg, 0, NULL);
+    return msg;
+}
+
+/* Unlike Linux and OS X, when a library is loaded, all the symbols aren't
+ * loaded into a single namespace. You must fetch the symbol by iterating over
+ * all loaded modules. Code for finding the function from any of the loaded
+ * modules is taken from gmodule.c in glib */
+fptr find_any_f (const char *name) {
+    fptr f;
+    HANDLE snapshot;
+    MODULEENTRY32 me32;
+
+    snapshot = CreateToolhelp32Snapshot (TH32CS_SNAPMODULE, 0);
+    if (snapshot == (HANDLE) -1) {
+        wchar_t *msg = win32_get_last_error();
+        printf("Could not get snapshot: %S\n", msg);
+        return 0;
+    }
+
+    me32.dwSize = sizeof (me32);
+
+    f = NULL;
+    if (Module32First (snapshot, &me32)) {
+        do {
+            if ((f = (fptr) GetProcAddress (me32.hModule, name)) != NULL)
+                break;
+        } while (Module32Next (snapshot, &me32));
+    }
+
+    CloseHandle (snapshot);
+    return f;
+}
+#endif
+
+int DLL_PUBLIC func(void) {
+    fptr f;
+
+    f = find_any_f ("func_from_language_runtime");
+    if (f != NULL)
+        return f();
+    printf ("Could not find function\n");
+    return 1;
+}
+
+#else
+/*
+ * Shared modules often have references to symbols that are not defined
+ * at link time, but which will be provided from deps of the executable that
+ * dlopens it. We need to make sure that this works, i.e. that we do
+ * not pass -Wl,--no-undefined when linking modules.
+ */
+int func_from_language_runtime(void);
+
+int DLL_PUBLIC func(void) {
+    return func_from_language_runtime();
+}
+#endif
diff --git a/meson/test cases/cmake/21 shared module/subprojects/cmMod/module/module.h b/meson/test cases/cmake/21 shared module/subprojects/cmMod/module/module.h
new file mode 100644
index 000000000..e1d9c1397
--- /dev/null
+++ b/meson/test cases/cmake/21 shared module/subprojects/cmMod/module/module.h	
@@ -0,0 +1,3 @@
+#pragma once
+
+#define SPECIAL_MAGIC_DEFINE 42
-- 
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