From d9d6338c8177e9fd676d0c0afb7e5689119f9405 Mon Sep 17 00:00:00 2001
From: Matt Bolitho <matt.bolitho.software@gmail.com>
Date: Sun, 17 Nov 2024 19:43:34 +0000
Subject: [PATCH] Adds initial CMake presets configuration (#2169)

* Adds CMakeUserPresets.json to gitignore

* Adds presets based on root CMakeLists

* Adds build presets

* Adds naive preset configuration detection

* Adds self review changes

* Uses NOT DEFINED for preset check
---
 .gitignore               |   2 +
 enzyme/CMakeLists.txt    |  10 ++--
 enzyme/CMakePresets.json | 103 +++++++++++++++++++++++++++++++++++++++
 3 files changed, 111 insertions(+), 4 deletions(-)
 create mode 100644 enzyme/CMakePresets.json

diff --git a/.gitignore b/.gitignore
index a3c2751a0f5c..5e7285d5f0af 100644
--- a/.gitignore
+++ b/.gitignore
@@ -11,3 +11,5 @@ enzyme/benchmarks/ReverseMode/*/*.exe
 enzyme/benchmarks/ReverseMode/*/results.txt
 enzyme/benchmarks/ReverseMode/*/results.json
 .cache
+CMakeUserPresets.json
+/out
diff --git a/enzyme/CMakeLists.txt b/enzyme/CMakeLists.txt
index 1f51afe2789d..2ba42e969ce8 100644
--- a/enzyme/CMakeLists.txt
+++ b/enzyme/CMakeLists.txt
@@ -17,11 +17,13 @@ add_definitions(-DENZYME_VERSION_PATCH=${ENZYME_PATCH_VERSION})
 
 set(CMAKE_EXPORT_COMPILE_COMMANDS ON)
 set(CMAKE_POSITION_INDEPENDENT_CODE ON)
-SET(CMAKE_CXX_FLAGS "-Wall -fno-rtti ${CMAKE_CXX_FLAGS} -Werror=unused-variable -Werror=dangling-else -Werror=unused-but-set-variable -Werror=return-type -Werror=nonnull -Werror=unused-result -Werror=reorder -Werror=switch")
-SET(CMAKE_CXX_FLAGS_RELWITHDEBINFO "-O2 -g -ggdb")
-SET(CMAKE_CXX_FLAGS_RELEASE "-O2")
 
-SET(CMAKE_CXX_FLAGS_DEBUG  "-O0 -g -ggdb -fno-omit-frame-pointer")
+if (NOT DEFINED ENZYME_CONFIGURED_WITH_PRESETS)
+  set(CMAKE_CXX_FLAGS "-Wall -fno-rtti ${CMAKE_CXX_FLAGS} -Werror=unused-variable -Werror=dangling-else -Werror=unused-but-set-variable -Werror=return-type -Werror=nonnull -Werror=unused-result -Werror=reorder -Werror=switch")
+  set(CMAKE_CXX_FLAGS_RELWITHDEBINFO "-O2 -g -ggdb")
+  set(CMAKE_CXX_FLAGS_RELEASE "-O2")
+  set(CMAKE_CXX_FLAGS_DEBUG  "-O0 -g -ggdb -fno-omit-frame-pointer")
+endif()
 
 #SET(CMAKE_CXX_FLAGS_DEBUG  "-O0 -g -fno-omit-frame-pointer -fsanitize=address")
 #SET(CMAKE_LINKER_FLAGS_DEBUG "${CMAKE_LINKER_FLAGS_DEBUG} -fno-omit-frame-pointer -fsanitize=address")
diff --git a/enzyme/CMakePresets.json b/enzyme/CMakePresets.json
new file mode 100644
index 000000000000..1a5ffa80c5d9
--- /dev/null
+++ b/enzyme/CMakePresets.json
@@ -0,0 +1,103 @@
+{
+    "version": 3,
+    "configurePresets": [
+        {
+            "name": "config-base",
+            "description": "Base configure preset.",
+            "hidden": true,
+            "generator": "Ninja",
+            "binaryDir": "${sourceDir}/out/build/${presetName}",
+            "installDir": "${sourceDir}/out/install/${presetName}",
+            "cacheVariables": {
+                "CMAKE_CXX_STANDARD": "17",
+                "CMAKE_CXX_STANDARD_REQUIRED": "ON",
+                "CMAKE_EXPORT_COMPILE_COMMANDS": "ON",
+                "ENZYME_CONFIGURED_WITH_PRESETS": "ON"
+            }
+        },
+        {
+            "name": "config-base-linux",
+            "description": "Base configure preset for Linux.",
+            "inherits": "config-base",
+            "hidden": true,
+            "cacheVariables": {
+                "CMAKE_POSITION_INDEPENDENT_CODE": "ON"
+            },
+            "condition": {
+                "type": "equals",
+                "lhs": "${hostSystemName}",
+                "rhs": "Linux"
+            }
+        },
+        {
+            "name": "config-base-x64",
+            "description": "Base preset for x64 platforms.",
+            "hidden": true,
+            "architecture": {
+                "value": "x64",
+                "strategy": "external"
+            }
+        },
+        {
+            "name": "x64-linux-clang",
+            "description": "Base preset for Linux development using Clang compilers.",
+            "hidden": true,
+            "inherits": [
+                "config-base-x64",
+                "config-base-linux"
+            ],
+            "cacheVariables": {
+                "CMAKE_C_COMPILER": "clang",
+                "CMAKE_CXX_COMPILER": "clang++",
+                "CMAKE_CXX_FLAGS": "-Wall -fno-rtti -Werror=unused-variable -Werror=dangling-else -Werror=unused-but-set-variable -Werror=return-type -Werror=nonnull -Werror=unused-result -Werror=reorder -Werror=switch",
+                "CMAKE_CXX_FLAGS_DEBUG": "-O0 -g -ggdb -fno-omit-frame-pointer",
+                "CMAKE_CXX_FLAGS_RELEASE": "-O2",
+                "CMAKE_CXX_FLAGS_RELWITHDEBINFO": "-O2 -g -ggdb"
+            }
+        },
+        {
+            "name": "x64-linux-clang-debug",
+            "displayName": "Clang x64 Linux Debug",
+            "inherits": "x64-linux-clang",
+            "cacheVariables": {
+                "CMAKE_BUILD_TYPE": "Debug"
+            }
+        },
+        {
+            "name": "x64-linux-clang-release",
+            "displayName": "Clang x64 Linux Release",
+            "inherits": "x64-linux-clang",
+            "cacheVariables": {
+                "CMAKE_BUILD_TYPE": "Release"
+            }
+        },
+        {
+            "name": "x64-linux-clang-release-with-debug-info",
+            "displayName": "Clang x64 Linux Release with Debug Info",
+            "inherits": "x64-linux-clang",
+            "cacheVariables": {
+                "CMAKE_BUILD_TYPE": "RelWithDebInfo"
+            }
+        }
+    ],
+    "buildPresets": [
+        {
+            "name": "x64-linux-clang-debug",
+            "displayName": "Clang x64 Linux Debug",
+            "description": "Builds the project using Clang on Linux in Debug configuration.",
+            "configurePreset": "x64-linux-clang-debug"
+        },
+        {
+            "name": "x64-linux-clang-release",
+            "displayName": "Clang x64 Linux Release",
+            "description": "Builds the project using Clang on Linux in Release configuration.",
+            "configurePreset": "x64-linux-clang-release"
+        },
+        {
+            "name": "x64-linux-clang-release-with-debug-info",
+            "displayName": "Clang x64 Linux Release with Debug Info",
+            "description": "Builds the project using Clang on Linux in Release configuration with debug info.",
+            "configurePreset": "x64-linux-clang-release-with-debug-info"
+        }
+    ]
+}