From 0c623051f878c00aa8ca7afeb5c25b37d6a2b238 Mon Sep 17 00:00:00 2001
From: Marvel Renju <marvelrenju1@gmail.com>
Date: Sun, 26 Mar 2023 22:06:52 +0100
Subject: [PATCH] Link against libc for desktop linux

---
 src/vk/Commands.cs | 43 +++++++++++++++++++++++++++++++++++++++++--
 src/vk/Libc.cs     | 22 ++++++++++++++++++++++
 2 files changed, 63 insertions(+), 2 deletions(-)
 create mode 100644 src/vk/Libc.cs

diff --git a/src/vk/Commands.cs b/src/vk/Commands.cs
index 7583757..84466cf 100644
--- a/src/vk/Commands.cs
+++ b/src/vk/Commands.cs
@@ -104,7 +104,8 @@ public static NativeLibrary Load(string libraryName)
             {
                 return new WindowsNativeLibrary(libraryName);
             }
-            else if (RuntimeInformation.IsOSPlatform(OSPlatform.Linux)
+            else if ((RuntimeInformation.IsOSPlatform(OSPlatform.Linux)
+                && RuntimeInformation.OSDescription.Contains("Unix"))
                 || RuntimeInformation.IsOSPlatform(OSPlatform.OSX)
                 #if NET5_0
                 || OperatingSystem.IsAndroid()
@@ -113,6 +114,10 @@ public static NativeLibrary Load(string libraryName)
             {
                 return new UnixNativeLibrary(libraryName);
             }
+            else if (RuntimeInformation.IsOSPlatform(OSPlatform.Linux))
+            {
+                return new LinuxNativeLibrary(libraryName);
+            }
             else
             {
                 throw new PlatformNotSupportedException("Cannot load native libraries on this platform: " + RuntimeInformation.OSDescription);
@@ -151,7 +156,7 @@ public UnixNativeLibrary(string libraryName) : base(libraryName)
             protected override IntPtr LoadLibrary(string libraryName)
             {
                 Libdl.dlerror();
-                IntPtr handle = Libdl.dlopen(libraryName, Libdl.RTLD_NOW);
+                IntPtr handle = Libc.dlopen(libraryName, Libdl.RTLD_NOW);
                 if (handle == IntPtr.Zero && !Path.IsPathRooted(libraryName))
                 {
                     string baseDir = AppContext.BaseDirectory;
@@ -175,5 +180,39 @@ protected override IntPtr LoadFunction(string functionName)
                 return Libdl.dlsym(NativeHandle, functionName);
             }
         }
+
+        private class LinuxNativeLibrary : NativeLibrary
+        {
+            public LinuxNativeLibrary(string libraryName) : base(libraryName)
+            {
+            }
+
+            protected override IntPtr LoadLibrary(string libraryName)
+            {
+                Libc.dlerror();
+                IntPtr handle = Libc.dlopen(libraryName, Libc.RTLD_NOW);
+                if (handle == IntPtr.Zero && !Path.IsPathRooted(libraryName))
+                {
+                    string baseDir = AppContext.BaseDirectory;
+                    if (!string.IsNullOrWhiteSpace(baseDir))
+                    {
+                        string localPath = Path.Combine(baseDir, libraryName);
+                        handle = Libc.dlopen(localPath, Libc.RTLD_NOW);
+                    }
+                }
+
+                return handle;
+            }
+
+            protected override void FreeLibrary(IntPtr libraryHandle)
+            {
+                Libc.dlclose(libraryHandle);
+            }
+
+            protected override IntPtr LoadFunction(string functionName)
+            {
+                return Libc.dlsym(NativeHandle, functionName);
+            }
+        }
     }
 }
diff --git a/src/vk/Libc.cs b/src/vk/Libc.cs
new file mode 100644
index 0000000..4f5bf63
--- /dev/null
+++ b/src/vk/Libc.cs
@@ -0,0 +1,22 @@
+using System;
+using System.Runtime.InteropServices;
+
+namespace Vulkan
+{
+    internal static class Libc
+    {
+        [DllImport("libc")]
+        public static extern IntPtr dlopen(string fileName, int flags);
+
+        [DllImport("libc")]
+        public static extern IntPtr dlsym(IntPtr handle, string name);
+
+        [DllImport("libc")]
+        public static extern int dlclose(IntPtr handle);
+
+        [DllImport("libc")]
+        public static extern string dlerror();
+
+        public const int RTLD_NOW = 0x002;
+    }
+}