[arrow] 16/43: ARROW-5838: [C++] Delegate OPENSSL_ROOT_DIR to bundled gRPC

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commit e74b9d16a2988cc1b2b624b8290cdcb160901b9c
Author: Sutou Kouhei <ko...@clear-code.com>
AuthorDate: Fri Jul 5 09:03:04 2019 +0200

    ARROW-5838: [C++] Delegate OPENSSL_ROOT_DIR to bundled gRPC
    
    Author: Sutou Kouhei <ko...@clear-code.com>
    
    Closes #4795 from kou/cpp-macos-grpc-openssl and squashes the following commits:
    
    6014d4573 <Sutou Kouhei>  Delegate OPENSSL_ROOT_DIR to bundled gRPC
---
 cpp/cmake_modules/ThirdpartyToolchain.cmake | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/cpp/cmake_modules/ThirdpartyToolchain.cmake b/cpp/cmake_modules/ThirdpartyToolchain.cmake
index b913123..a8595e9 100644
--- a/cpp/cmake_modules/ThirdpartyToolchain.cmake
+++ b/cpp/cmake_modules/ThirdpartyToolchain.cmake
@@ -2140,6 +2140,9 @@ macro(build_grpc)
       -DCMAKE_INSTALL_LIBDIR=lib
       "-DProtobuf_PROTOC_LIBRARY=${GRPC_Protobuf_PROTOC_LIBRARY}"
       -DBUILD_SHARED_LIBS=OFF)
+  if(OPENSSL_ROOT_DIR)
+    list(APPEND GRPC_CMAKE_ARGS -DOPENSSL_ROOT_DIR=${OPENSSL_ROOT_DIR})
+  endif()
 
   # XXX the gRPC git checkout is huge and takes a long time
   # Ideally, we should be able to use the tarballs, but they don't contain