[llvm-branch-commits] [compiler-rt] ccbab59 - [compiler-rt] Fix scudo build on ARM

[Leandro Lupori via llvm-branch-commits]

Author: Leandro Lupori
Date: 2023-04-27T11:10:43Z
New Revision: ccbab5979b7bd594314b50f4fc54ec57a676f391

URL: https://github.com/llvm/llvm-project/commit/ccbab5979b7bd594314b50f4fc54ec57a676f391
DIFF: https://github.com/llvm/llvm-project/commit/ccbab5979b7bd594314b50f4fc54ec57a676f391.diff

LOG: [compiler-rt] Fix scudo build on ARM

The build of scudo was failing on armv7l, with undefined references
to unwinder symbols, such as __aeabi_unwind_cpp_pr0. These are
needed by RTGwpAsan and thus, on ARM, scudo must also be linked
against an unwind library.

The cmake command that caused the build failure was:

cmake --fresh -S "$PWD/llvm/" -B "$PWD/build/" -G Ninja \
  -DCMAKE_INSTALL_PREFIX="$PWD/install" \
  -DCMAKE_BUILD_TYPE=Release \
  -DLLVM_ENABLE_PROJECTS="clang;lld;lldb;clang-tools-extra;polly" \
  -DLLVM_ENABLE_RUNTIMES="compiler-rt;libcxx;libcxxabi;libunwind" \
  -DLLVM_TOOLCHAIN_TOOLS="llvm-ar;llvm-ranlib;llvm-objdump;\
llvm-rc;llvm-cvtres;llvm-nm;llvm-strings;llvm-readobj;\
llvm-dlltool;llvm-pdbutil;llvm-objcopy;llvm-strip;llvm-cov;\
llvm-profdata;llvm-addr2line;llvm-symbolizer;llvm-windres;llvm-ml;\
llvm-readelf;llvm-size" \
  -DLLVM_INSTALL_BINUTILS_SYMLINKS=OFF -DLLVM_PARALLEL_LINK_JOBS=1

Fixes #60115

Reviewed By: hctim

Differential Revision: https://reviews.llvm.org/D142888

(cherry picked from commit e1e972689b9138db795885a5468a15aafbe7cb51)

Added: 
    

Modified: 
    compiler-rt/lib/scudo/standalone/CMakeLists.txt

Removed: 
    


################################################################################
diff  --git a/compiler-rt/lib/scudo/standalone/CMakeLists.txt b/compiler-rt/lib/scudo/standalone/CMakeLists.txt
index 9ac3340877da1..d75b7fd235230 100644
--- a/compiler-rt/lib/scudo/standalone/CMakeLists.txt
+++ b/compiler-rt/lib/scudo/standalone/CMakeLists.txt
@@ -129,8 +129,19 @@ set(SCUDO_SOURCES_CXX_WRAPPERS
   )
 
 set(SCUDO_OBJECT_LIBS)
+set(SCUDO_LINK_LIBS)
 
 if (COMPILER_RT_HAS_GWP_ASAN)
+  if(COMPILER_RT_USE_LLVM_UNWINDER)
+    list(APPEND SCUDO_LINK_LIBS ${COMPILER_RT_UNWINDER_LINK_LIBS} dl)
+  elseif (COMPILER_RT_HAS_GCC_S_LIB)
+    list(APPEND SCUDO_LINK_LIBS gcc_s)
+  elseif (COMPILER_RT_HAS_GCC_LIB)
+    list(APPEND SCUDO_LINK_LIBS gcc)
+  elseif (NOT COMPILER_RT_USE_BUILTINS_LIBRARY)
+    message(FATAL_ERROR "No suitable unwinder library")
+  endif()
+
   add_dependencies(scudo_standalone gwp_asan)
   list(APPEND SCUDO_OBJECT_LIBS
        RTGwpAsan RTGwpAsanBacktraceLibc RTGwpAsanSegvHandler
@@ -143,8 +154,6 @@ if (COMPILER_RT_HAS_GWP_ASAN)
 
 endif()
 
-set(SCUDO_LINK_LIBS ${COMPILER_RT_UNWINDER_LINK_LIBS})
-
 if(COMPILER_RT_BUILD_SCUDO_STANDALONE_WITH_LLVM_LIBC)
   include_directories(${COMPILER_RT_BINARY_DIR}/../libc/include/)