[compiler-rt] Build custom libcxx with libcxxabi

This changes add_custom_libcxx to also build libcxxabi and merges
the two into a static and hermetic library.
There are multiple advantages:
1) The resulting libFuzzer doesn't expose C++ internals and looks
   like a plain C library.
2) We don't have to manually link in libstdc++ to provide cxxabi.
3) The sanitizer tests cannot interfere with an installed version
   of libc++.so in LD_LIBRARY_PATH.

Differential Revision: https://reviews.llvm.org/D58013

llvm-svn: 354212

1 files changed, 24 insertions, 0 deletions

diff --git a/compiler-rt/cmake/Modules/CustomLibcxx/CMakeLists.txt b/compiler-rt/cmake/Modules/CustomLibcxx/CMakeLists.txt
new file mode 100644
index 00000000000..c644dc2fd5d
--- /dev/null
+++ b/compiler-rt/cmake/Modules/CustomLibcxx/CMakeLists.txt
@@ -0,0 +1,24 @@
+cmake_minimum_required(VERSION 3.4.3)
+
+# Build static libcxxabi.
+set(LIBCXXABI_STANDALONE_BUILD 1)
+set(LIBCXXABI_ENABLE_SHARED OFF CACHE BOOL "")
+set(LIBCXXABI_HERMETIC_STATIC_LIBRARY ON CACHE STRING "")
+set(LIBCXXABI_LIBCXX_PATH ${COMPILER_RT_LIBCXX_PATH} CACHE PATH "")
+set(LIBCXXABI_INCLUDE_TESTS OFF CACHE BOOL "")
+add_subdirectory(${COMPILER_RT_LIBCXXABI_PATH} ${CMAKE_CURRENT_BINARY_DIR}/cxxabi)
+
+# Build static libcxx without exceptions.
+set(LIBCXX_STANDALONE_BUILD 1)
+set(LIBCXX_ENABLE_EXPERIMENTAL_LIBRARY OFF CACHE BOOL "")
+set(LIBCXX_ENABLE_SHARED OFF CACHE BOOL "")
+set(LIBCXX_ENABLE_EXCEPTIONS OFF CACHE BOOL "")
+set(LIBCXX_HERMETIC_STATIC_LIBRARY ON CACHE BOOL "")
+
+# Use above libcxxabi.
+set(LIBCXX_CXX_ABI "libcxxabi" CACHE STRING "")
+set(LIBCXX_CXX_ABI_INTREE 1)
+set(LIBCXX_ENABLE_STATIC_ABI_LIBRARY ON CACHE BOOL "")
+set(LIBCXX_CXX_ABI_INCLUDE_PATHS ${COMPILER_RT_LIBCXXABI_PATH}/include CACHE PATH "")
+
+add_subdirectory(${COMPILER_RT_LIBCXX_PATH} ${CMAKE_CURRENT_BINARY_DIR}/cxx)