arrow-fix-build.patch

Fix a build bug that would cause the linker to try linking against
'arrow_static' even when building with -DARROW_BUILD_STATIC=off:

https://issues.apache.org/jira/browse/ARROW-1308

Patch copied from upstream pull request:

https://github.com/apache/arrow/pull/931/commits/88391fe0685742cff489d0bf1a5b1a09b8d73b3b

From 88391fe0685742cff489d0bf1a5b1a09b8d73b3b Mon Sep 17 00:00:00 2001
From: Wes McKinney <wes.mckinney@twosigma.com>
Date: Tue, 1 Aug 2017 16:08:49 -0400
Subject: [PATCH] Link utility executables to Arrow shared library if
 ARROW_BUILD_STATIC=off

Change-Id: If418c42ea18aac30eae8482bba7e401c5d8258d1
---
 cpp/src/arrow/ipc/CMakeLists.txt | 22 +++++++++++++---------
 1 file changed, 13 insertions(+), 9 deletions(-)

diff --git a/cpp/src/arrow/ipc/CMakeLists.txt b/cpp/src/arrow/ipc/CMakeLists.txt
index 9cc61bced..76e52a0f7 100644
--- a/cpp/src/arrow/ipc/CMakeLists.txt
+++ b/cpp/src/arrow/ipc/CMakeLists.txt
@@ -90,18 +90,22 @@ install(FILES
   writer.h
   DESTINATION "${CMAKE_INSTALL_INCLUDEDIR}/arrow/ipc")
 
-if(MSVC)
-  set(UTIL_LINK_LIBS
-    arrow_static
-    ${BOOST_FILESYSTEM_LIBRARY}
-    ${BOOST_SYSTEM_LIBRARY})
+if (ARROW_BUILD_STATIC)
+  set(ARROW_UTIL_LIB arrow_static)
 else()
+  set(ARROW_UTIL_LIB arrow_shared)
+endif()
+
+set(UTIL_LINK_LIBS
+  ${ARROW_UTIL_LIB}
+  ${BOOST_FILESYSTEM_LIBRARY}
+  ${BOOST_SYSTEM_LIBRARY})
+
+if(NOT MSVC)
   set(UTIL_LINK_LIBS
-    arrow_static
+    ${UTIL_LINK_LIBS}
     pthread
-    ${BOOST_FILESYSTEM_LIBRARY}
-    ${BOOST_SYSTEM_LIBRARY}
-    dl)
+    ${CMAKE_DL_LIBS})
 endif()
 
 if (ARROW_BUILD_UTILITIES)