Merge pull request #711 from os-fpga/stars_NO_LTO

stars: no LTO and O1 to address centos7 production build

Author: serge-dsa

stars/CMakeLists.txt

@@ -11,8 +11,8 @@ message(STATUS "Building with IPO: off")
 set(OPENFPGA_IPO_BUILD "off" CACHE STRING "Should be compiled with LTO?")
 set_property(CACHE OPENFPGA_IPO_BUILD PROPERTY STRINGS auto off off)
 
-set(CMAKE_C_FLAGS "${CMAKE_C_FLAGS} -fPIC -mavx2 -march=haswell")
-set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -fPIC -mavx2 -march=haswell")
+set(CMAKE_C_FLAGS "${CMAKE_C_FLAGS} -fPIC -O1 -mavx2 -march=haswell")
+set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -fPIC -O1 -mavx2 -march=haswell")
 set(CMAKE_CXX_FLAGS_RELEASE "${CMAKE_CXX_FLAGS_RELEASE} -fPIC -O1 -mavx2 -march=haswell")
 
 file(GLOB_RECURSE EXEC_SOURCE src/main.cpp)
@@ -49,5 +49,7 @@ target_link_libraries(libPlanner
 add_executable(stars ${EXEC_SOURCE})
 target_link_libraries(stars libPlanner libvpr)
 
+set_target_properties(stars libPlanner PROPERTIES INTERPROCEDURAL_OPTIMIZATION OFF)
+
 install(TARGETS stars DESTINATION bin)