[compiler-rt] 4c27981 - [compiler-rt] Support triples that start with thumb*- (#206848)

[via llvm-commits]

Author: Petr Hosek
Date: 2026-06-30T23:14:09-07:00
New Revision: 4c27981352753962ffeba8ba9a6d2d49b70a240b

URL: https://github.com/llvm/llvm-project/commit/4c27981352753962ffeba8ba9a6d2d49b70a240b
DIFF: https://github.com/llvm/llvm-project/commit/4c27981352753962ffeba8ba9a6d2d49b70a240b.diff

LOG: [compiler-rt] Support triples that start with thumb*- (#206848)

thumb*- can be used as an alias for arm*- (implying -mthumb).

Added: 
    

Modified: 
    compiler-rt/cmake/Modules/CompilerRTUtils.cmake

Removed: 
    


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diff  --git a/compiler-rt/cmake/Modules/CompilerRTUtils.cmake b/compiler-rt/cmake/Modules/CompilerRTUtils.cmake
index 75216ed704bce..e4e3cfb9a2d99 100644
--- a/compiler-rt/cmake/Modules/CompilerRTUtils.cmake
+++ b/compiler-rt/cmake/Modules/CompilerRTUtils.cmake
@@ -419,6 +419,11 @@ macro(construct_compiler_rt_default_triple)
     set(COMPILER_RT_DEFAULT_TARGET_ARCH "i386")
   endif()
 
+  if("${COMPILER_RT_DEFAULT_TARGET_ARCH}" MATCHES "^thumb")
+    string(REPLACE "thumb" "arm" COMPILER_RT_DEFAULT_TARGET_ARCH "${COMPILER_RT_DEFAULT_TARGET_ARCH}")
+    set(COMPILER_RT_ARM_THUMB ON)
+  endif()
+
   if("${COMPILER_RT_DEFAULT_TARGET_ARCH}" MATCHES "amdgpu|amdgcn")
     set(COMPILER_RT_TARGET_AMDGPU TRUE)
   else()