[clang] [CMake][Fuchsia] Switch to RUNTIMES_USE_LIBC option (PR #147776)

[Petr Hosek via cfe-commits]

https://github.com/petrhosek created 
https://github.com/llvm/llvm-project/pull/147776

LIBCXX_LIBC was renamed to RUNTIMES_USE_LIBC in #134893.

>From 304ac9b69c58fac4f39606df5ac9ece452f64e7d Mon Sep 17 00:00:00 2001
From: Petr Hosek <pho...@google.com>
Date: Wed, 9 Jul 2025 09:20:08 -0700
Subject: [PATCH] [CMake][Fuchsia] Switch to RUNTIMES_USE_LIBC option

LIBCXX_LIBC was renamed to RUNTIMES_USE_LIBC in #134893.
---
 clang/cmake/caches/Fuchsia-stage2.cmake | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/clang/cmake/caches/Fuchsia-stage2.cmake 
b/clang/cmake/caches/Fuchsia-stage2.cmake
index 99890b8246ad7..674eb2a6645e9 100644
--- a/clang/cmake/caches/Fuchsia-stage2.cmake
+++ b/clang/cmake/caches/Fuchsia-stage2.cmake
@@ -362,7 +362,6 @@ foreach(target 
armv6m-none-eabi;armv7m-none-eabi;armv7em-none-eabi;armv8m.main-n
   set(RUNTIMES_${target}_LIBCXX_ENABLE_SHARED OFF CACHE BOOL "")
   set(RUNTIMES_${target}_LIBCXX_ENABLE_STATIC ON CACHE BOOL "")
   set(RUNTIMES_${target}_LIBCXX_SHARED_OUTPUT_NAME "c++-shared" CACHE STRING 
"")
-  set(RUNTIMES_${target}_LIBCXX_LIBC "llvm-libc" CACHE STRING "")
   set(RUNTIMES_${target}_LIBCXX_ENABLE_FILESYSTEM OFF CACHE BOOL "")
   set(RUNTIMES_${target}_LIBCXX_ENABLE_RANDOM_DEVICE OFF CACHE BOOL "")
   set(RUNTIMES_${target}_LIBCXX_ENABLE_LOCALIZATION OFF CACHE BOOL "")
@@ -376,6 +375,7 @@ foreach(target 
armv6m-none-eabi;armv7m-none-eabi;armv7em-none-eabi;armv8m.main-n
   set(RUNTIMES_${target}_LLVM_INCLUDE_TESTS OFF CACHE BOOL "")
   set(RUNTIMES_${target}_LLVM_ENABLE_ASSERTIONS OFF CACHE BOOL "")
   set(RUNTIMES_${target}_LLVM_ENABLE_RUNTIMES "libc;libcxx" CACHE STRING "")
+  set(RUNTIMES_${target}_RUNTIMES_USE_LIBC "llvm-libc" CACHE STRING "")
 
   # Enable FatLTO for baremetal runtimes
   set(RUNTIMES_${target}_LLVM_ENABLE_LTO OFF CACHE BOOL "")
@@ -417,7 +417,6 @@ foreach(target riscv32-unknown-elf)
   set(RUNTIMES_${target}_LIBCXX_ENABLE_SHARED OFF CACHE BOOL "")
   set(RUNTIMES_${target}_LIBCXX_ENABLE_STATIC ON CACHE BOOL "")
   set(RUNTIMES_${target}_LIBCXX_SHARED_OUTPUT_NAME "c++-shared" CACHE STRING 
"")
-  set(RUNTIMES_${target}_LIBCXX_LIBC "llvm-libc" CACHE STRING "")
   set(RUNTIMES_${target}_LIBCXX_ENABLE_FILESYSTEM OFF CACHE BOOL "")
   set(RUNTIMES_${target}_LIBCXX_ENABLE_RANDOM_DEVICE OFF CACHE BOOL "")
   set(RUNTIMES_${target}_LIBCXX_ENABLE_LOCALIZATION OFF CACHE BOOL "")
@@ -431,6 +430,7 @@ foreach(target riscv32-unknown-elf)
   set(RUNTIMES_${target}_LLVM_INCLUDE_TESTS OFF CACHE BOOL "")
   set(RUNTIMES_${target}_LLVM_ENABLE_ASSERTIONS OFF CACHE BOOL "")
   set(RUNTIMES_${target}_LLVM_ENABLE_RUNTIMES "libc;libcxx" CACHE STRING "")
+  set(RUNTIMES_${target}_RUNTIMES_USE_LIBC "llvm-libc" CACHE STRING "")
 
   # Enable FatLTO for baremetal runtimes
   set(RUNTIMES_${target}_LLVM_ENABLE_LTO OFF CACHE BOOL "")

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