From cb6ee577ff70d1665784482d803a6ae4d20d1c94 Mon Sep 17 00:00:00 2001
From: William Candillon <wcandillon@gmail.com>
Date: Sun, 1 Jun 2025 15:33:12 +0200
Subject: [PATCH 1/2] Fix invalid target triple for MAC_UNIVERSAL builds

My apologies for this AI-generated PR. I am the maintainer of https://github.com/wcandillon/react-native-webgpu and we've always relied on ios-cmake for our CMake builds. It has been tremendously helpful. This AI-generated change helped us fix our macOS build.
Below is the AI-generated description of the change:
```
  ## Problem
  When building for `MAC_UNIVERSAL` platform, CMake fails with the error:
  clang: error: version 'arm64' in target triple 'arm64-apple-macosx11.0-arm64' is invalid

  This occurs because the toolchain generates an invalid target triple `x86_64-arm64-apple-macosx11.0` by combining multiple architectures with dashes, which clang cannot parse.

  ## Root Cause
  The `MAC_UNIVERSAL` configuration was setting `APPLE_TARGET_TRIPLE_INT` to `${ARCHS_SPLIT}-apple-macosx${DEPLOYMENT_TARGET}` where `ARCHS_SPLIT` becomes `x86_64-arm64`. This creates an invalid target triple format that clang rejects.

  ## Solution
  Remove the target triple setting for `MAC_UNIVERSAL` builds and let CMake handle the universal build using the standard `-arch x86_64 -arch arm64` approach. This follows the same pattern used by other COMBINED builds in the toolchain.

  Universal builds should rely on the `-arch` flags rather than target triples, as:
  - Target triples are meant for single architectures
  - Universal builds are handled at the linker level by combining object files from different architectures
  - CMake's built-in universal build support works correctly without explicit target triples
```
---
 ios.toolchain.cmake | 5 +++--
 1 file changed, 3 insertions(+), 2 deletions(-)

diff --git a/ios.toolchain.cmake b/ios.toolchain.cmake
index 9046fd7..93cf56a 100644
--- a/ios.toolchain.cmake
+++ b/ios.toolchain.cmake
@@ -585,8 +585,9 @@ elseif(PLATFORM_INT STREQUAL "MAC_UNIVERSAL")
   if(NOT ARCHS)
     set(ARCHS "x86_64;arm64")
   endif()
-  string(REPLACE ";" "-" ARCHS_SPLIT "${ARCHS}")
-  set(APPLE_TARGET_TRIPLE_INT ${ARCHS_SPLIT}-apple-macosx${DEPLOYMENT_TARGET})
+  # For universal builds, don't set target triple - let CMake handle it
+  # string(REPLACE ";" "-" ARCHS_SPLIT "${ARCHS}")
+  # set(APPLE_TARGET_TRIPLE_INT ${ARCHS_SPLIT}-apple-macosx${DEPLOYMENT_TARGET})
 elseif(PLATFORM_INT STREQUAL "MAC_CATALYST_UNIVERSAL")
   set(SDK_NAME macosx)
   if(NOT ARCHS)

From 8094de1147ff5f84e645c5b069224aaf1ef9193b Mon Sep 17 00:00:00 2001
From: Oliver Epper <oliver.epper@gmail.com>
Date: Wed, 25 Jun 2025 16:31:01 +0200
Subject: [PATCH 2/2] Fix invalid target triple for MAC_CATALYST_UNIVERSAL
 builds

---
 ios.toolchain.cmake | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/ios.toolchain.cmake b/ios.toolchain.cmake
index 93cf56a..fa1df43 100644
--- a/ios.toolchain.cmake
+++ b/ios.toolchain.cmake
@@ -594,7 +594,7 @@ elseif(PLATFORM_INT STREQUAL "MAC_CATALYST_UNIVERSAL")
     set(ARCHS "x86_64;arm64")
   endif()
   string(REPLACE ";" "-" ARCHS_SPLIT "${ARCHS}")
-  set(APPLE_TARGET_TRIPLE_INT ${ARCHS_SPLIT}-apple-ios${DEPLOYMENT_TARGET}-macabi)
+  set(APPLE_TARGET_TRIPLE_INT apple-ios${DEPLOYMENT_TARGET}-macabi)
 else()
   message(FATAL_ERROR "Invalid PLATFORM: ${PLATFORM_INT}")
 endif()