[Beignet] [PATCH] relax the build dependency on Gen GPU

[Guo Yejun]

currently, the Gen GPU pciid of the underlying system is queried
and then passed to gbe_bin_generater as the target option.

This does not work when building the driver on another system with
non-intel GPUs, this patch relaxes the dependency by exporting the
pciid setting at CMake level, therefore, the pciid could be given
as a CMake option besides the current real time query method.

this patch also remove the redundancy code in utest/CMake by setting
PARENT_SCOPE in src/CMake.

Signed-off-by: Guo Yejun <yejun.guo at intel.com>
---
 src/CMakeLists.txt    | 8 +++++---
 utests/CMakeLists.txt | 5 -----
 2 files changed, 5 insertions(+), 8 deletions(-)

diff --git a/src/CMakeLists.txt b/src/CMakeLists.txt
index 20e1a4c..2e65322 100644
--- a/src/CMakeLists.txt
+++ b/src/CMakeLists.txt
@@ -5,10 +5,12 @@ include_directories(${CMAKE_CURRENT_SOURCE_DIR}
                     ${CMAKE_CURRENT_SOURCE_DIR}/../include
                     ${MESA_SOURCE_INCLUDES})
 
-set(GEN_PCI_ID)
-execute_process(COMMAND "${CMAKE_CURRENT_SOURCE_DIR}/GetGenID.sh"
+if (NOT GEN_PCI_ID)
+  execute_process(COMMAND "${CMAKE_CURRENT_SOURCE_DIR}/GetGenID.sh"
     OUTPUT_VARIABLE GEN_PCI_ID)
-message(STATUS "Platform Gen PCI id is " ${GEN_PCI_ID})
+  message(STATUS "Platform Gen PCI id is " ${GEN_PCI_ID})
+  set(GEN_PCI_ID ${GEN_PCI_ID} PARENT_SCOPE)
+endif (NOT GEN_PCI_ID)
 
 macro (MakeKernelBinStr KERNEL_PATH KERNEL_FILES)
 foreach (KF ${KERNEL_FILES})
diff --git a/utests/CMakeLists.txt b/utests/CMakeLists.txt
index a731ab0..48f8de0 100644
--- a/utests/CMakeLists.txt
+++ b/utests/CMakeLists.txt
@@ -180,11 +180,6 @@ set (utests_sources
   utest_file_map.cpp
   utest_helper.cpp)
 
-set(GEN_PCI_ID)
-execute_process(COMMAND "${CMAKE_CURRENT_SOURCE_DIR}/../src/GetGenID.sh"
-    OUTPUT_VARIABLE GEN_PCI_ID)
-
-message(STATUS "Platform Gen PCI id is " ${GEN_PCI_ID})
 SET (kernel_bin ${CMAKE_CURRENT_SOURCE_DIR}/../kernels/compiler_ceil)
 ADD_CUSTOM_COMMAND(
     OUTPUT ${kernel_bin}.bin
-- 
1.8.3.2