[libunwind] 380fee3 - [libunwind] Provide a way to set '_LIBUNWIND_IS_BAREMETAL' through cmake.

[Hafiz Abid Qadeer via cfe-commits]

Author: Hafiz Abid Qadeer
Date: 2020-07-29T11:48:28+01:00
New Revision: 380fee34d2794361f9e222fe3c8c065be3b9fff8

URL: https://github.com/llvm/llvm-project/commit/380fee34d2794361f9e222fe3c8c065be3b9fff8
DIFF: https://github.com/llvm/llvm-project/commit/380fee34d2794361f9e222fe3c8c065be3b9fff8.diff

LOG: [libunwind] Provide a way to set '_LIBUNWIND_IS_BAREMETAL' through cmake.

Libunwind uses _LIBUNWIND_IS_BAREMETAL in a lot of places but there is no cmake variable to set it. This patch adds such a variable. It is quite like what LIBCXXABI_BAREMETAL does in libcxxabi.

Reviewed By: compnerd, #libunwind

Differential Revision: https://reviews.llvm.org/D84759

Added: 
    

Modified: 
    libunwind/CMakeLists.txt

Removed: 
    


################################################################################
diff  --git a/libunwind/CMakeLists.txt b/libunwind/CMakeLists.txt
index c5b536532f3c..4606360f07ab 100644
--- a/libunwind/CMakeLists.txt
+++ b/libunwind/CMakeLists.txt
@@ -137,6 +137,7 @@ option(LIBUNWIND_ENABLE_THREADS "Build libunwind with threading support." ON)
 option(LIBUNWIND_WEAK_PTHREAD_LIB "Use weak references to refer to pthread functions." OFF)
 option(LIBUNWIND_USE_COMPILER_RT "Use compiler-rt instead of libgcc" OFF)
 option(LIBUNWIND_INCLUDE_DOCS "Build the libunwind documentation." ${LLVM_INCLUDE_DOCS})
+option(LIBUNWIND_IS_BAREMETAL "Build libunwind for baremetal targets." OFF)
 
 set(LIBUNWIND_LIBDIR_SUFFIX "${LLVM_LIBDIR_SUFFIX}" CACHE STRING
     "Define suffix of library directory name (32/64)")
@@ -361,6 +362,10 @@ if (LIBUNWIND_ENABLE_ARM_WMMX)
   add_compile_flags(-D__ARM_WMMX)
 endif()
 
+if(LIBUNWIND_IS_BAREMETAL)
+  add_compile_definitions(_LIBUNWIND_IS_BAREMETAL)
+endif()
+
 # This is the _ONLY_ place where add_definitions is called.
 if (MSVC)
   add_definitions(-D_CRT_SECURE_NO_WARNINGS)