Reorganize toolchain files

Author: mrexodia

README.md

@@ -7,14 +7,13 @@ Reference: https://zig.news/kristoff/cross-compile-a-c-c-project-with-zig-3599
 ## Building
 
 - [Install zig](https://ziglang.org/learn/getting-started/#installing-zig) in your PATH (`choco install zig` on Windows)
-- `cmake -B build-aarch64 -G Ninja -DCMAKE_TOOLCHAIN_FILE=cmake/zig-toolchain-aarch64.cmake`
+- `cmake -B build-aarch64 -G Ninja --toolchain aarch64-linux-gnu.cmake`
 - `cmake --build build-arch64`
 
-You can create toolchains for other triples like this. Here is an example to build for Windows on ARM64:
+You can create toolchains for other triples as well, just create a file named `aarch64-windows-gnu.cmake` with the following contents to build for Windows on ARM64:
 
 ```cmake
-set(ZIG_TARGET "aarch64-windows-gnu")
-include(${CMAKE_CURRENT_LIST_DIR}/zig-toolchain.cmake)
+include(${CMAKE_CURRENT_LIST_DIR}/cmake/zig-toolchain.cmake)
 ```
 
 ## clangd

aarch64-linux-gnu.cmake

@@ -0,0 +1 @@
+include(${CMAKE_CURRENT_LIST_DIR}/cmake/zig-toolchain.cmake)

aarch64-windows-gnu.cmake

@@ -0,0 +1 @@
+include(${CMAKE_CURRENT_LIST_DIR}/cmake/zig-toolchain.cmake)

cmake/zig-toolchain-aarch64.cmake

@@ -4,8 +4,16 @@ if(CMAKE_GENERATOR MATCHES "Visual Studio")
     message(FATAL_ERROR "Visual Studio generator not supported, use: cmake -G Ninja")
 endif()
 
+if(NOT DEFINED ZIG_TARGET)
+    get_filename_component(PARENT_LIST_DIR "${CMAKE_PARENT_LIST_FILE}" DIRECTORY)
+    string(FIND "${CMAKE_CURRENT_LIST_DIR}" "${PARENT_LIST_DIR}" POS)
+    if(POS EQUAL 0)
+        get_filename_component(ZIG_TARGET "${CMAKE_PARENT_LIST_FILE}" NAME_WE)
+    endif()
+endif()
+
 if(NOT ZIG_TARGET MATCHES "^([a-zZ-Z0-9_]+)-([a-zZ-Z0-9_]+)-([a-zZ-Z0-9_]+)$")
-    message(FATAL_ERROR "Expected -DZIG_TARGET=<arch>-<os>-<abi>")
+    message(FATAL_ERROR "Expected ZIG_TARGET=<arch>-<os>-<abi>")
 endif()
 
 set(ZIG_ARCH ${CMAKE_MATCH_1})

cmake/zig-toolchain-riscv64.cmake

@@ -0,0 +1 @@
+include(${CMAKE_CURRENT_LIST_DIR}/cmake/zig-toolchain.cmake)

cmake/zig-toolchain-uefi64.cmake

@@ -0,0 +1 @@
+include(${CMAKE_CURRENT_LIST_DIR}/cmake/zig-toolchain.cmake)

cmake/zig-toolchain-win64.cmake

@@ -0,0 +1 @@
+include(${CMAKE_CURRENT_LIST_DIR}/cmake/zig-toolchain.cmake)

cmake/zig-toolchain-winarm64.cmake

@@ -0,0 +1 @@
+include(${CMAKE_CURRENT_LIST_DIR}/cmake/zig-toolchain.cmake)

cmake/zig-toolchain.cmake

@@ -0,0 +1 @@
+include(${CMAKE_CURRENT_LIST_DIR}/cmake/zig-toolchain.cmake)