From 6a3d31af2deac811578962bb3d8cb3a2ffbac53b Mon Sep 17 00:00:00 2001
From: Jiaxun Yang <jiaxun.yang@flygoat.com>
Date: Sun, 26 Jan 2020 22:37:16 +0800
Subject: [PATCH] build: add support for Linux MIPS64 cross compilation

Mostly identical to the ARM one except bullet is disabled due
to CI nolonger provide formal bullet build but switch to
libbulletc have not completed.

Signed-off-by: Jiaxun Yang <jiaxun.yang@flygoat.com>
---
 README.md                                     |  1 +
 build.gradle.kts                              |  1 +
 build.xml                                     | 22 +++++++++++++++++++
 config/build-bindings.xml                     | 17 +++++++-------
 config/build-definitions.xml                  |  6 ++---
 config/linux/build.xml                        |  1 +
 .../main/java/org/lwjgl/system/Platform.java  | 15 ++++++++-----
 7 files changed, 47 insertions(+), 16 deletions(-)

diff --git a/README.md b/README.md
index 12feb54525..30402e7662 100644
--- a/README.md
+++ b/README.md
@@ -74,6 +74,7 @@ following platforms/architectures:
 - Linux x64
 - Linux arm64 (ARMv8/AArch64)
 - Linux arm32 (ARMv7/armhf)
+- Linux mips64 (mips64r2 Little-Endian)
 - macOS x64
 - Windows x64
 - Windows x86
diff --git a/build.gradle.kts b/build.gradle.kts
index 0f23f8f52d..4a40d5ff50 100644
--- a/build.gradle.kts
+++ b/build.gradle.kts
@@ -62,6 +62,7 @@ enum class Platforms(val classifier: String) {
     LINUX("linux"),
     LINUX_ARM64("linux-arm64"),
     LINUX_ARM32("linux-arm32"),
+    LINUX_MIPS64("linux-mips64"),
     MACOS("macos"),
     WINDOWS("windows"),
     WINDOWS_X86("windows-x86");
diff --git a/build.xml b/build.xml
index cc9ad37b2a..fb8b41bf28 100644
--- a/build.xml
+++ b/build.xml
@@ -951,6 +951,7 @@
         <element name="linux-content" optional="true"/>
         <element name="linux-arm64-content" optional="true"/>
         <element name="linux-arm32-content" optional="true"/>
+        <element name="linux-mips64-content" optional="true"/>
         <element name="macos-content" optional="true"/>
         <element name="windows-content" optional="true"/>
         <element name="windows-x86-content" optional="true"/>
@@ -979,6 +980,10 @@
                 <get-release platform="linux" arch="arm32" file="lib@{native-library}.so" if:set="auto-natives"/>
                 <get-release platform="linux" arch="arm32" file="lib@{native-library}.so.git" if:set="git-revision"/>
 
+
+                <get-release platform="linux" arch="mips64" file="lib@{native-library}.so" if:set="auto-natives"/>
+                <get-release platform="linux" arch="mips64" file="lib@{native-library}.so.git" if:set="git-revision"/>
+
                 <get-release platform="macos" arch="x64" file="lib@{native-library}.dylib" if:set="auto-natives"/>
                 <get-release platform="macos" arch="x64" file="lib@{native-library}.dylib.git" if:set="git-revision"/>
 
@@ -1036,6 +1041,9 @@
                 <natives-jar name="@{name}" title="@{title}" platform="linux-arm32" path="linux/arm32" type="so">
                     <linux-arm32-content/>
                 </natives-jar>
+                <natives-jar name="@{name}" title="@{title}" platform="linux-mips64" path="linux/mips64" type="so">
+                    <linux-mips64-content/>
+                </natives-jar>
                 <natives-jar name="@{name}" title="@{title}" platform="macos" path="macos/x64" type="dylib">
                     <macos-content/>
                 </natives-jar>
@@ -1057,6 +1065,7 @@
         <element name="linux" optional="true"/>
         <element name="linux-arm64" optional="true"/>
         <element name="linux-arm32" optional="true"/>
+        <element name="linux-mips64" optional="true"/>
         <element name="macos" optional="true"/>
         <element name="windows" optional="true"/>
         <element name="windows-x86" optional="true"/>
@@ -1078,6 +1087,7 @@
                 <linux-content><linux/></linux-content>
                 <linux-arm64-content><linux-arm64/></linux-arm64-content>
                 <linux-arm32-content><linux-arm32/></linux-arm32-content>
+                <linux-mips64-content><linux-mips64/></linux-mips64-content>
                 <macos-content><macos/></macos-content>
                 <windows-content><windows/></windows-content>
                 <windows-x86-content><windows-x86/></windows-x86-content>
@@ -1271,6 +1281,11 @@
                 <get-release platform="linux" arch="arm32" file="libglfw_wayland.so"/>
                 <get-release platform="linux" arch="arm32" file="libglfw_wayland.so.git"/>
 
+                <get-release platform="linux" arch="mips64" file="libglfw.so"/>
+                <get-release platform="linux" arch="mips64" file="libglfw.so.git"/>
+                <get-release platform="linux" arch="mips64" file="libglfw_wayland.so"/>
+                <get-release platform="linux" arch="mips64" file="libglfw_wayland.so.git"/>
+
                 <get-release platform="macos" arch="x64" file="libglfw.dylib"/>
                 <get-release platform="macos" arch="x64" file="libglfw.dylib.git"/>
 
@@ -1345,6 +1360,9 @@
                 <get-release platform="linux" arch="arm32" file="libopenal.so"/>
                 <get-release platform="linux" arch="arm32" file="libopenal.so.git"/>
 
+                <get-release platform="linux" arch="mips64" file="libopenal.so"/>
+                <get-release platform="linux" arch="mips64" file="libopenal.so.git"/>
+
                 <get-release platform="macos" arch="x64" file="libopenal.dylib"/>
                 <get-release platform="macos" arch="x64" file="libopenal.dylib.git"/>
 
@@ -1421,6 +1439,10 @@
                 <get-release platform="linux" arch="arm32" file="libshaderc.so.git"/>
                 <get-release platform="linux" arch="arm32" file="libshaderc_spvc.so"/>
 
+                <get-release platform="linux" arch="mips64" file="libshaderc.so"/>
+                <get-release platform="linux" arch="mips64" file="libshaderc.so.git"/>
+                <get-release platform="linux" arch="mips64" file="libshaderc_spvc.so"/>
+
                 <get-release platform="macos" arch="x64" file="libshaderc.dylib"/>
                 <get-release platform="macos" arch="x64" file="libshaderc.dylib.git"/>
                 <get-release platform="macos" arch="x64" file="libshaderc_spvc.dylib"/>
diff --git a/config/build-bindings.xml b/config/build-bindings.xml
index 10fd86a3bd..14b401d51d 100644
--- a/config/build-bindings.xml
+++ b/config/build-bindings.xml
@@ -14,8 +14,8 @@ This script is included in /config/build-definitions.xml.
 
     <!-- // ========== BINDING FLAGS ======== // -->
 
-    <local name="notARM"/>
-    <condition property="notARM">
+    <local name="isX86Fam"/>
+    <condition property="isX86Fam">
         <or>
             <isset property="build.arch.x64"/>
             <isset property="build.arch.x86"/>
@@ -24,7 +24,8 @@ This script is included in /config/build-definitions.xml.
 
     <property name="binding.assimp" value="true"/>
     <property name="binding.bgfx" value="true"/>
-    <property name="binding.bullet" value="true"/>
+    <!-- FIXME: Build bullet for MIPS64 after switch to libbulletc complete -->
+    <condition property="binding.bullet" value="false" else="true"><isset property="build.arch.mips64"/></condition>
     <property name="binding.cuda" value="true"/>
     <property name="binding.driftfx" value="true"/>
     <property name="binding.egl" value="true"/>
@@ -37,31 +38,31 @@ This script is included in /config/build-definitions.xml.
     <property name="binding.lz4" value="true"/>
     <condition property="binding.meow" value="true" else="false">
         <or>
-            <isset property="notARM"/>
+            <isset property="isX86Fam"/>
             <isset property="build.arch.arm64"/>
         </or>
     </condition>
     <property name="binding.meshoptimizer" value="true"/>
     <property name="binding.nanovg" value="true"/>
-    <condition property="binding.nfd" value="true" else="false"><isset property="notARM"/></condition>
+    <condition property="binding.nfd" value="true" else="false"><isset property="isX86Fam"/></condition>
     <property name="binding.nuklear" value="true"/>
     <property name="binding.odbc" value="true"/>
     <property name="binding.openal" value="true"/>
     <property name="binding.opencl" value="true"/>
     <property name="binding.opengl" value="true"/>
     <property name="binding.opengles" value="true"/>
-    <condition property="binding.openvr" value="true" else="false"><isset property="notARM"/></condition>
+    <condition property="binding.openvr" value="true" else="false"><isset property="isX86Fam"/></condition>
     <property name="binding.opus" value="true"/>
     <property name="binding.par" value="true"/>
     <property name="binding.remotery" value="true"/>
     <property name="binding.rpmalloc" value="true"/>
     <property name="binding.shaderc" value="true"/>
     <property name="binding.spvc" value="true"/>
-    <condition property="binding.sse" value="true" else="false"><isset property="notARM"/></condition>
+    <condition property="binding.sse" value="true" else="false"><isset property="isX86Fam"/></condition>
     <property name="binding.stb" value="true"/>
     <property name="binding.tinyexr" value="true"/>
     <property name="binding.tinyfd" value="true"/>
-    <condition property="binding.tootle" value="true" else="false"><isset property="notARM"/></condition>
+    <condition property="binding.tootle" value="true" else="false"><isset property="isX86Fam"/></condition>
     <property name="binding.vma" value="true"/>
     <property name="binding.vulkan" value="true"/>
     <property name="binding.xxhash" value="true"/>
diff --git a/config/build-definitions.xml b/config/build-definitions.xml
index 71eb23802c..d983d7ea7c 100644
--- a/config/build-definitions.xml
+++ b/config/build-definitions.xml
@@ -16,15 +16,15 @@ This script is included in /build.xml and /config/update-dependencies.xml.
 
         By default, os.arch of the JVM that runs ANT is used, but this can be overridden for cross-compiling to another architecture.
 
-        Valid values: x64, x86, arm64, arm32
+        Valid values: x64, x86, arm64, arm32, mips64
     -->
     <property name="build.arch" value="${env.LWJGL_BUILD_ARCH}" if:set="env.LWJGL_BUILD_ARCH"/>
     <condition property="build.arch" value="x64" else="x86" unless:set="build.arch"> <!-- Normalize os.arch -->
         <contains string="${os.arch}" substring="64"/>
     </condition>
 
-    <fail message="Invalid or unsupported build architecture: ${build.arch}. Supported: x64, x86, arm64, arm32">
-        <condition><not><matches string="${build.arch}" pattern="^(x64|x86|arm64|arm32)$"/></not></condition>
+    <fail message="Invalid or unsupported build architecture: ${build.arch}. Supported: x64, x86, arm64, arm32, mips64">
+        <condition><not><matches string="${build.arch}" pattern="^(x64|x86|arm64|arm32|mips64)$"/></not></condition>
     </fail>
 
     <property name="build.arch.${build.arch}" value="true"/>
diff --git a/config/linux/build.xml b/config/linux/build.xml
index 3ab3819b1a..f113035636 100644
--- a/config/linux/build.xml
+++ b/config/linux/build.xml
@@ -7,6 +7,7 @@
 
     <property name="gcc.prefix" value="aarch64-linux-gnu-" if:set="build.arch.arm64"/>
     <property name="gcc.prefix" value="arm-linux-gnueabihf-" if:set="build.arch.arm32"/>
+    <property name="gcc.prefix" value="mips64el-linux-gnuabi64-" if:set="build.arch.mips64"/>
 
     <condition property="gcc.prefix" value="${gcc.prefix}" else="">
         <isset property="gcc.prefix"/>
diff --git a/modules/lwjgl/core/src/main/java/org/lwjgl/system/Platform.java b/modules/lwjgl/core/src/main/java/org/lwjgl/system/Platform.java
index 1babac9199..491093e01d 100644
--- a/modules/lwjgl/core/src/main/java/org/lwjgl/system/Platform.java
+++ b/modules/lwjgl/core/src/main/java/org/lwjgl/system/Platform.java
@@ -54,7 +54,8 @@ public enum Architecture {
         X64(true),
         X86(false),
         ARM64(true),
-        ARM32(false);
+        ARM32(false),
+        MIPS64(true);
 
         static final Architecture current;
 
@@ -64,10 +65,14 @@ public enum Architecture {
             String  osArch  = System.getProperty("os.arch");
             boolean is64Bit = osArch.contains("64") || osArch.startsWith("armv8");
 
-            current = osArch.startsWith("arm") || osArch.startsWith("aarch64")
-                ? (is64Bit ? Architecture.ARM64 : Architecture.ARM32)
-                : (is64Bit ? Architecture.X64 : Architecture.X86);
-        }
+                if (osArch.startsWith("arm") || osArch.startsWith("aarch64")) {
+                    current = (is64Bit ? Architecture.ARM64 : Architecture.ARM32);
+                } else if (osArch.startsWith("mips") || osArch.startsWith("loongson")) {
+                    current = Architecture.MIPS64;
+                } else {
+                    current = (is64Bit ? Architecture.X64 : Architecture.X86);
+                }
+            }
 
         Architecture(boolean is64Bit) {
             this.is64Bit = is64Bit;