libcxx: Fix build on ARM due to libcxxabi not finding libunwind sources

Signed-off-by: Khem Raj <raj.khem@gmail.com>

3 files changed, 72 insertions, 2 deletions

diff --git a/recipes-devtools/clang/clang/0001-libcxxabi-Find-libunwind-headers-when-LIBCXXABI_LIBU.patch b/recipes-devtools/clang/clang/0001-libcxxabi-Find-libunwind-headers-when-LIBCXXABI_LIBU.patch
new file mode 100644
index 0000000..ed0e9ef
--- /dev/null
+++ b/recipes-devtools/clang/clang/0001-libcxxabi-Find-libunwind-headers-when-LIBCXXABI_LIBU.patch
@@ -0,0 +1,68 @@
+From ad79d6051f2c4299b7b286d5a60e2aa1b9a92898 Mon Sep 17 00:00:00 2001
+From: Khem Raj <raj.khem@gmail.com>
+Date: Sun, 27 Aug 2017 10:37:49 -0700
+Subject: [PATCH] libcxxabi: Find libunwind headers when
+ LIBCXXABI_LIBUNWIND_INCLUDES is set
+
+Currently, when LIBCXXABI_LIBUNWIND_INCLUDES is set via CMake arguments
+then it ends up not searching the specified dir and unwind.h is not found
+especially for ARM targets
+
+This patch makes the searching synthesized directories and then set
+LIBCXXABI_LIBUNWIND_INCLUDES if its there in environment
+
+Signed-off-by: Khem Raj <raj.khem@gmail.com>
+---
+ CMakeLists.txt | 21 +++++++++++----------
+ 1 file changed, 11 insertions(+), 10 deletions(-)
+
+diff --git a/CMakeLists.txt b/CMakeLists.txt
+index 4db3328..29cba1a 100644
+--- a/CMakeLists.txt
++++ b/CMakeLists.txt
+@@ -402,15 +402,10 @@ set(CMAKE_C_FLAGS "${CMAKE_C_FLAGS} ${LIBCXXABI_C_FLAGS}")
+ # Setup Source Code
+ #===============================================================================
+ 
+-set(LIBCXXABI_LIBUNWIND_INCLUDES "${LIBCXXABI_LIBUNWIND_INCLUDES}" CACHE PATH
+-    "Specify path to libunwind includes." FORCE)
+-set(LIBCXXABI_LIBUNWIND_PATH "${LIBCXXABI_LIBUNWIND_PATH}" CACHE PATH
+-    "Specify path to libunwind source." FORCE)
+-
+ include_directories(include)
+ if (LIBCXXABI_USE_LLVM_UNWINDER OR LLVM_NATIVE_ARCH MATCHES ARM)
+   find_path(
+-    LIBCXXABI_LIBUNWIND_INCLUDES_INTERNAL
++    LIBCXXABI_LIBUNWIND_INCLUDES
+     libunwind.h
+     PATHS ${LIBCXXABI_LIBUNWIND_INCLUDES}
+           ${LIBCXXABI_LIBUNWIND_PATH}/include
+@@ -420,15 +415,21 @@ if (LIBCXXABI_USE_LLVM_UNWINDER OR LLVM_NATIVE_ARCH MATCHES ARM)
+     NO_DEFAULT_PATH
+   )
+ 
+-  if (LIBCXXABI_LIBUNWIND_INCLUDES_INTERNAL STREQUAL "LIBCXXABI_LIBUNWIND_INCLUDES_INTERNAL-NOTFOUND")
+-    set(LIBCXXABI_LIBUNWIND_INCLUDES_INTERNAL "")
++  if (LIBCXXABI_LIBUNWIND_INCLUDES STREQUAL "LIBCXXABI_LIBUNWIND_INCLUDES-NOTFOUND")
++    set(LIBCXXABI_LIBUNWIND_INCLUDES "")
+   endif()
+ 
+-  if (NOT LIBCXXABI_LIBUNWIND_INCLUDES_INTERNAL STREQUAL "")
+-    include_directories("${LIBCXXABI_LIBUNWIND_INCLUDES_INTERNAL}")
++  if (NOT LIBCXXABI_LIBUNWIND_INCLUDES STREQUAL "")
++    include_directories("${LIBCXXABI_LIBUNWIND_INCLUDES}")
+   endif()
+ endif()
+ 
++set(LIBCXXABI_LIBUNWIND_INCLUDES "${LIBCXXABI_LIBUNWIND_INCLUDES}" CACHE PATH
++    "Specify path to libunwind includes." FORCE)
++set(LIBCXXABI_LIBUNWIND_PATH "${LIBCXXABI_LIBUNWIND_PATH}" CACHE PATH
++    "Specify path to libunwind source." FORCE)
++
++
+ # Add source code. This also contains all of the logic for deciding linker flags
+ # soname, etc...
+ add_subdirectory(src)
+-- 
+2.14.1
+
diff --git a/recipes-devtools/clang/common.inc b/recipes-devtools/clang/common.inc
index 93463b7..194f554 100644
--- a/recipes-devtools/clang/common.inc
+++ b/recipes-devtools/clang/common.inc
@@ -24,6 +24,7 @@ CLANGPATCHES += "${@'file://0007-clang-Enable-SSP-and-PIE-by-default.patch;patch
 
 # libcxxabi patches
 LIBCXXABIPATCHES ="\
+    file://0001-libcxxabi-Find-libunwind-headers-when-LIBCXXABI_LIBU.patch;patchdir=projects/libcxxabi \
 "
 
 # libc++ patches
diff --git a/recipes-devtools/clang/libcxx_git.bb b/recipes-devtools/clang/libcxx_git.bb
index 2ab7951..117562f 100644
--- a/recipes-devtools/clang/libcxx_git.bb
+++ b/recipes-devtools/clang/libcxx_git.bb
@@ -41,14 +41,15 @@ EXTRA_OECMAKE += "\
                   -DLIBCXX_CXX_ABI=libcxxabi \
                   -DLLVM_BUILD_EXTERNAL_COMPILER_RT=ON \
                   -DCXX_SUPPORTS_CXX11=ON \
+                  -DLIBCXXABI_LIBUNWIND_INCLUDES=${S}/projects/libunwind/include \
                   -DLIBCXXABI_LIBCXX_INCLUDES=${S}/projects/libcxx/include \
                   -DLIBCXX_CXX_ABI_INCLUDE_PATHS=${S}/projects/libcxxabi/include \
                   -DLIBCXX_CXX_ABI_LIBRARY_PATH=${B}/lib \
-                  -DLIBCXXABI_USE_LLVM_UNWINDER=1 \
+                  -DLIBCXXABI_USE_LLVM_UNWINDER=ON \
                   -G Ninja \
                   ${S} \
 "
-EXTRA_OECMAKE_remove_mipsarch = "-DLIBCXXABI_USE_LLVM_UNWINDER=1"
+EXTRA_OECMAKE_remove_mipsarch = "-DLIBCXXABI_USE_LLVM_UNWINDER=ON"
 
 EXTRA_OECMAKE_append_libc-musl = " -DLIBCXX_HAS_MUSL_LIBC=ON "