[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
GitOrigin-RevId: 380fee34d2794361f9e222fe3c8c065be3b9fff8
diff --git a/CMakeLists.txt b/CMakeLists.txt
index c5b5365..4606360 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -137,6 +137,7 @@
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 @@
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)
