[llvm] eabe2eb - [libc] Remove special full build handling for GPU (#128572)

[via llvm-commits]

Author: Joseph Huber
Date: 2025-02-24T15:49:17-06:00
New Revision: eabe2eb933556bf3e0db0d2d98e96f962bde14dc

URL: https://github.com/llvm/llvm-project/commit/eabe2eb933556bf3e0db0d2d98e96f962bde14dc
DIFF: https://github.com/llvm/llvm-project/commit/eabe2eb933556bf3e0db0d2d98e96f962bde14dc.diff

LOG: [libc] Remove special full build handling for GPU (#128572)

Summary:
Currently we default to non-fullbuild for all targets, but realistically
we should do this depending on the target OS. Some OS's like the GPU or
upcoming UEFI have no existing hosted system, so they cannot be built
with an overlay build. These are already errors so there's no reason to
complicate things and require passing it in through the runtimes build.

Added: 
    

Modified: 
    libc/CMakeLists.txt
    llvm/runtimes/CMakeLists.txt

Removed: 
    


################################################################################
diff  --git a/libc/CMakeLists.txt b/libc/CMakeLists.txt
index 47708c2267818..a4fbba92c2727 100644
--- a/libc/CMakeLists.txt
+++ b/libc/CMakeLists.txt
@@ -128,7 +128,13 @@ else()
   endif()
 endif()
 
-option(LLVM_LIBC_FULL_BUILD "Build and test LLVM libc as if it is the full libc" OFF)
+# Some targets can only support the full build.
+set(default_to_full_build OFF)
+if(LIBC_TARGET_OS_IS_GPU)
+  set(default_to_full_build ON)
+endif()
+
+option(LLVM_LIBC_FULL_BUILD "Build and test LLVM libc as if it is the full libc" ${default_to_full_build})
 option(LLVM_LIBC_IMPLEMENTATION_DEFINED_TEST_BEHAVIOR "Build LLVM libc tests assuming our implementation-defined behavior" ON)
 option(LLVM_LIBC_ENABLE_LINTING "Enables linting of libc source files" OFF)
 

diff  --git a/llvm/runtimes/CMakeLists.txt b/llvm/runtimes/CMakeLists.txt
index 2370b41fb7f0b..77a82ed196cd9 100644
--- a/llvm/runtimes/CMakeLists.txt
+++ b/llvm/runtimes/CMakeLists.txt
@@ -535,7 +535,6 @@ if(build_runtimes)
              "-DRUNTIMES_amdgcn-amd-amdhsa_LIBC_GPU_LOADER_EXECUTABLE=$<TARGET_FILE:amdhsa-loader>")
         list(APPEND extra_deps amdhsa-loader)
       endif()
-      list(APPEND extra_cmake_args "-DRUNTIMES_amdgcn-amd-amdhsa_LLVM_LIBC_FULL_BUILD=ON")
     endif()
     if("libc" IN_LIST RUNTIMES_nvptx64-nvidia-cuda_LLVM_ENABLE_RUNTIMES)
       if(TARGET nvptx-loader)
@@ -543,7 +542,6 @@ if(build_runtimes)
              "-DRUNTIMES_nvptx64-nvidia-cuda_LIBC_GPU_LOADER_EXECUTABLE=$<TARGET_FILE:nvptx-loader>")
         list(APPEND extra_deps nvptx-loader)
       endif()
-      list(APPEND extra_cmake_args "-DRUNTIMES_nvptx64-nvidia-cuda_LLVM_LIBC_FULL_BUILD=ON")
     endif()
     if(TARGET clang-offload-packager)
       list(APPEND extra_deps clang-offload-packager)