[clang] [CMake][Fuchsia] -fvisibility=hidden for baremetal runtimes (PR #98049)

[Petr Hosek via cfe-commits]

https://github.com/petrhosek created https://github.com/llvm/llvm-project/pull/98049

This is a temporary workaround for #97655.

>From ba8285b822b190f06ef584e317b4407ce618d8c0 Mon Sep 17 00:00:00 2001
From: Petr Hosek <phosek at google.com>
Date: Mon, 8 Jul 2024 09:54:39 -0700
Subject: [PATCH] [CMake][Fuchsia] -fvisibility=hidden for baremetal runtimes

This is a temporary workaround for #97655.
---
 clang/cmake/caches/Fuchsia-stage2.cmake | 5 +++--
 1 file changed, 3 insertions(+), 2 deletions(-)

diff --git a/clang/cmake/caches/Fuchsia-stage2.cmake b/clang/cmake/caches/Fuchsia-stage2.cmake
index 52687a2cf8ea9c..315d88ec8027ff 100644
--- a/clang/cmake/caches/Fuchsia-stage2.cmake
+++ b/clang/cmake/caches/Fuchsia-stage2.cmake
@@ -321,7 +321,7 @@ foreach(target armv6m-unknown-eabi;armv7m-unknown-eabi;armv8m-unknown-eabi)
   set(RUNTIMES_${target}_CMAKE_BUILD_TYPE RelWithDebInfo CACHE STRING "")
   set(RUNTIMES_${target}_CMAKE_TRY_COMPILE_TARGET_TYPE STATIC_LIBRARY CACHE STRING "")
   foreach(lang C;CXX;ASM)
-    set(RUNTIMES_${target}_CMAKE_${lang}_FLAGS "--target=${target} -mthumb -Wno-atomic-alignment" CACHE STRING "")
+    set(RUNTIMES_${target}_CMAKE_${lang}_FLAGS "--target=${target} -mthumb -Wno-atomic-alignment -fvisibility=hidden" CACHE STRING "")
   endforeach()
   foreach(type SHARED;MODULE;EXE)
     set(RUNTIMES_${target}_CMAKE_${type}_LINKER_FLAGS "-fuse-ld=lld" CACHE STRING "")
@@ -369,7 +369,8 @@ foreach(target riscv32-unknown-elf)
   set(RUNTIMES_${target}_CMAKE_BUILD_TYPE RelWithDebInfo CACHE STRING "")
   set(RUNTIMES_${target}_CMAKE_TRY_COMPILE_TARGET_TYPE STATIC_LIBRARY CACHE STRING "")
   foreach(lang C;CXX;ASM)
-    set(RUNTIMES_${target}_CMAKE_${lang}_FLAGS "--target=${target} -march=rv32imafc -mabi=ilp32f" CACHE STRING "")
+    # TODO(#97655): Remove -fvisibility=hidden.
+    set(RUNTIMES_${target}_CMAKE_${lang}_FLAGS "--target=${target} -march=rv32imafc -mabi=ilp32f -fvisibility=hidden" CACHE STRING "")
   endforeach()
   foreach(type SHARED;MODULE;EXE)
     set(RUNTIMES_${target}_CMAKE_${type}_LINKER_FLAGS "-fuse-ld=lld" CACHE STRING "")