From 81cf8b68eca2636574f3d0a9fa1cf0b428c163e9 Mon Sep 17 00:00:00 2001
From: Richard-Qin-X <richard.qin.001@gmail.com>
Date: Sat, 1 Aug 2026 04:30:34 +0800
Subject: [Backend] Establish standalone build infrastructure

Add the thin monorepo CMake entry point and an independently configurable backend project. Enforce the Clang/C++23 toolchain, expose Make/Ninja-neutral tests and developer checks, export an installable RCCBackend package, and introduce the first Support error abstraction.
---
 cmake/modules/RCCPreventInSourceBuild.cmake | 8 ++++++++
 1 file changed, 8 insertions(+)
 create mode 100644 cmake/modules/RCCPreventInSourceBuild.cmake

(limited to 'cmake/modules/RCCPreventInSourceBuild.cmake')

diff --git a/cmake/modules/RCCPreventInSourceBuild.cmake b/cmake/modules/RCCPreventInSourceBuild.cmake
new file mode 100644
index 0000000..97b3392
--- /dev/null
+++ b/cmake/modules/RCCPreventInSourceBuild.cmake
@@ -0,0 +1,8 @@
+# SPDX-License-Identifier: GPL-3.0-or-later
+
+if(CMAKE_SOURCE_DIR STREQUAL CMAKE_BINARY_DIR)
+  message(
+    FATAL_ERROR
+      "RCC does not support in-source builds. Configure a separate build directory."
+  )
+endif()
-- 
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