[llvm-branch-commits] [clang] 9b5ea37 - [hexagon] Add dylib cmake + toolchain_only (#177247)

[Cullen Rhodes via llvm-branch-commits]

Author: Brian Cain
Date: 2026-02-18T08:13:25Z
New Revision: 9b5ea371700b016bda8c38e1e4ee01f54234ce86

URL: https://github.com/llvm/llvm-project/commit/9b5ea371700b016bda8c38e1e4ee01f54234ce86
DIFF: https://github.com/llvm/llvm-project/commit/9b5ea371700b016bda8c38e1e4ee01f54234ce86.diff

LOG: [hexagon] Add dylib cmake + toolchain_only (#177247)

The toolchains take up much less space when we enable dylib, so let's
create an option to build them that way.

Also: TOOLCHAIN_ONLY was ineffective in
hexagon-unknown-linux-musl-clang-cross.cmake because cmake takes the
first setting from hexagon-unknown-linux-musl-clang.cmake with
precedence. FORCE it to fix that issue.

Signed-off-by: Brian Cain <brian.cain at oss.qualcomm.com>
(cherry picked from commit cf4ce383b3c7776c06ee744acebfec1e0c1c946d)

Added: 
    clang/cmake/caches/hexagon-unknown-linux-musl-clang-dylib.cmake

Modified: 
    clang/cmake/caches/hexagon-unknown-linux-musl-clang-cross.cmake

Removed: 
    


################################################################################
diff  --git a/clang/cmake/caches/hexagon-unknown-linux-musl-clang-cross.cmake b/clang/cmake/caches/hexagon-unknown-linux-musl-clang-cross.cmake
index fd2aeec819fc0..e6b4e8c047b34 100644
--- a/clang/cmake/caches/hexagon-unknown-linux-musl-clang-cross.cmake
+++ b/clang/cmake/caches/hexagon-unknown-linux-musl-clang-cross.cmake
@@ -15,4 +15,6 @@ set(CLANG_LINKS_TO_CREATE
             clang-cpp
             CACHE STRING "")
 
-set(LLVM_INSTALL_TOOLCHAIN_ONLY ON CACHE BOOL "")
+# Note: FORCE is required to override the OFF setting in hexagon-unknown-linux-musl-clang.cmake
+# which is loaded earlier in the -C chain.
+set(LLVM_INSTALL_TOOLCHAIN_ONLY ON CACHE BOOL "" FORCE)

diff  --git a/clang/cmake/caches/hexagon-unknown-linux-musl-clang-dylib.cmake b/clang/cmake/caches/hexagon-unknown-linux-musl-clang-dylib.cmake
new file mode 100644
index 0000000000000..1a02ff25417bd
--- /dev/null
+++ b/clang/cmake/caches/hexagon-unknown-linux-musl-clang-dylib.cmake
@@ -0,0 +1,7 @@
+set(LLVM_BUILD_LLVM_DYLIB ON CACHE BOOL "")
+set(LLVM_LINK_LLVM_DYLIB ON CACHE BOOL "")
+set(CLANG_LINK_LLVM_DYLIB ON CACHE BOOL "")
+
+# Clear version suffix to prevent versioned library names like libLLVM.so.22.1-rc1
+# which lld doesn't recognize. This results in libLLVM.so.22.1 instead.
+set(LLVM_VERSION_SUFFIX "" CACHE STRING "")