Making CUDA additions conditional on CUDA installation

Signed-off-by: Raphael Defosseux <raphael.defosseux@eurecom.fr>

cmake_targets/CMakeLists.txt

@@ -45,20 +45,26 @@ project (OpenAirInterface)
 # Base CUDA setting
 ##############################################
 find_package(CUDA)
-message ("cuda include ${CUDA_INCLUDE_DIRS}")
-message ("cuda library ${CUDA_LIBRARY_DIRS}")
+if (CUDA_FOUND)
+    message ("cuda include ${CUDA_INCLUDE_DIRS}")
+    message ("cuda library ${CUDA_LIBRARY_DIRS}")
 
-add_definitions("-L/usr/local/cuda/lib64")
+    add_definitions("-L/usr/local/cuda/lib64")
 
-SET(CUDA_NVCC_FLAGS
+    SET(CUDA_NVCC_FLAGS
       "${CUDA_NVCC_FLAGS};-arch=sm_60;")
 
-# Disable warnings for CUDA
-SET(CUDA_NVCC_FLAGS "${CUDA_NVCC_FLAGS};-lpthread;-w;-O3;--default-stream;per-thread;-I/usr/local/cuda/inc;-L/usr/local/cuda/lib -lcutil;-rdc=true;-lcudadevrt")
-SET(CUDA_VERBOSE_BUILD ON)
-SET(CUDA_HOST_COMPILER "/usr/bin/g++")
+    # Disable warnings for CUDA
+    SET(CUDA_NVCC_FLAGS "${CUDA_NVCC_FLAGS};-lpthread;-w;-O3;--default-stream;per-thread;-I/usr/local/cuda/inc;-L/usr/local/cuda/lib -lcutil;-rdc=true;-lcudadevrt")
+    SET(CUDA_VERBOSE_BUILD ON)
+    SET(CUDA_HOST_COMPILER "/usr/bin/g++")
+
+    SET(CUDA_SEPARABLE_COMPILATION ON)
+
+else (CUDA_FOUND)
+   message ("No CUDA tool installed")
+endif ()
 
-SET(CUDA_SEPARABLE_COMPILATION ON)
 
 ###########################################
 # macros to define options as there is numerous options in oai
@@ -190,13 +196,22 @@ endif()
 set(CMAKE_C_FLAGS
   "${CMAKE_C_FLAGS} ${C_FLAGS_PROCESSOR} -pipe -std=gnu99 -Wall -Wstrict-prototypes -fno-strict-aliasing -rdynamic -funroll-loops -Wno-packed-bitfield-compat -fPIC")
 # add autotools definitions that were maybe used!
-# set(MKVER "'MAKE_VERSION(a,b,c)=((a)*256+(b)*16+c)'")
-set(CMAKE_C_FLAGS
+if (CUDA_FOUND)
+    set(CMAKE_C_FLAGS
            "${CMAKE_C_FLAGS} -DSTDC_HEADERS=1 -DHAVE_SYS_TYPES_H=1 -DHAVE_SYS_STAT_H=1 -DHAVE_STDLIB_H=1 -DHAVE_STRING_H=1 -DHAVE_MEMORY_H=1 -DHAVE_STRINGS_H=1 -DHAVE_INTTYPES_H=1 -DHAVE_STDINT_H=1 -DHAVE_UNISTD_H=1 -DHAVE_FCNTL_H=1 -DHAVE_ARPA_INET_H=1 -DHAVE_SYS_TIME_H=1 -DHAVE_SYS_SOCKET_H=1 -DHAVE_STRERROR=1 -DHAVE_SOCKET=1 -DHAVE_MEMSET=1 -DHAVE_GETTIMEOFDAY=1 -DHAVE_STDLIB_H=1 -DHAVE_MALLOC=1 -DHAVE_LIBSCTP "
-)
-set(CMAKE_CXX_FLAGS
+    )
+    set(CMAKE_CXX_FLAGS
 	"${CMAKE_CXX_FLAGS} ${C_FLAGS_PROCESSOR} -Wno-packed-bitfield-compat -fPIC -Wall -fno-strict-aliasing -rdynamic -std=c++11 "
-)
+    )
+else (CUDA_FOUND)
+    set(MKVER "'MAKE_VERSION(a,b,c)=((a)*256+(b)*16+c)'")
+    set(CMAKE_C_FLAGS
+           "${CMAKE_C_FLAGS} -DSTDC_HEADERS=1 -DHAVE_SYS_TYPES_H=1 -DHAVE_SYS_STAT_H=1 -DHAVE_STDLIB_H=1 -DHAVE_STRING_H=1 -DHAVE_MEMORY_H=1 -DHAVE_STRINGS_H=1 -DHAVE_INTTYPES_H=1 -DHAVE_STDINT_H=1 -DHAVE_UNISTD_H=1 -DHAVE_FCNTL_H=1 -DHAVE_ARPA_INET_H=1 -DHAVE_SYS_TIME_H=1 -DHAVE_SYS_SOCKET_H=1 -DHAVE_STRERROR=1 -DHAVE_SOCKET=1 -DHAVE_MEMSET=1 -DHAVE_GETTIMEOFDAY=1 -DHAVE_STDLIB_H=1 -DHAVE_MALLOC=1 -DHAVE_LIBSCTP -D${MKVER}"
+    )
+    set(CMAKE_CXX_FLAGS
+	"${CMAKE_CXX_FLAGS} ${C_FLAGS_PROCESSOR} -Wno-packed-bitfield-compat -fPIC -Wall -fno-strict-aliasing -rdynamic -std=c++11 -D${MKVER}"
+    )
+endif ()
 
 add_definitions("-DASN_DISABLE_OER_SUPPORT")
 
@@ -2821,26 +2836,36 @@ target_link_libraries(smallblocktest
   m pthread ${ATLAS_LIBRARIES} dl
   )
 
+if (CUDA_FOUND)
 ###################################################
 # For CUDA library 
 ###################################################
-CUDA_ADD_LIBRARY(LDPC_CU 
+    CUDA_ADD_LIBRARY(LDPC_CU 
       ${OPENAIR1_DIR}/PHY/CODING/nrLDPC_decoder_LYC/nrLDPC_decoder_LYC.cu
       )
-CUDA_ADD_CUFFT_TO_TARGET(LDPC_CU)
-cuda_add_executable(ldpctest
+    CUDA_ADD_CUFFT_TO_TARGET(LDPC_CU)
+    cuda_add_executable(ldpctest
       ${OPENAIR1_DIR}/PHY/CODING/TESTBENCH/ldpctest.c
       ${T_SOURCE}
       ${SHLIB_LOADER_SOURCES}
       )
-
-target_link_libraries(ldpctest -ldl
+    target_link_libraries(ldpctest -ldl
       -Wl,--start-group 
       LDPC_CU UTIL SIMU PHY_NR CONFIG_LIB 
       -Wl,--end-group
       m pthread ${ATLAS_LIBRARIES} dl
       )
 
+else (CUDA_FOUND)
+    add_executable(ldpctest  
+       ${PHY_NR_CODINGIF}
+       ${OPENAIR1_DIR}/PHY/CODING/TESTBENCH/ldpctest.c
+       ${T_SOURCE}
+       ${SHLIB_LOADER_SOURCES}
+       )
+
+endif ()
+
 # add_executable(ldpctest  
   # ${PHY_NR_CODINGIF}
   # ${OPENAIR1_DIR}/PHY/CODING/TESTBENCH/ldpctest.c