fix CMake bug related to TestQPX.c location

cmake/TestQPX.c was not found because it lacked the
appropriate relative path.

Fixes #1281

Change-Id: I5fcc8598c91e39a86c337f14497b6d5faff91116

diff --git a/CMakeLists.txt b/CMakeLists.txt
index b345bdf4241cc317bec2e32ebe342d459b8e1e20..8dabe69bb33de0489552dd984021b501a529fd6d 100644 (file)
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -890,7 +890,7 @@ elseif(${GMX_CPU_ACCELERATION} STREQUAL "IBM_QPX")
     if (CMAKE_CXX_COMPILER_ID MATCHES "XL" AND CMAKE_CXX_COMPILER_LOADED)
         GMX_TEST_CXXFLAG(XLC_BLUEGENEQ_CXXFLAG "-qarch=qp -qtune=qp" ACCELERATION_CXX_FLAGS)
         try_compile(TEST_QPX ${CMAKE_BINARY_DIR}
-            "cmake/TestQPX.c"
+            "${CMAKE_SOURCE_DIR}/cmake/TestQPX.c"
             COMPILE_DEFINITIONS "${ACCELERATION_CXX_FLAGS}")
         if(NOT TEST_QPX)
             message(FATAL_ERROR "Cannot compile the requested IBM QPX intrinsics.")