cmake

CMake

CPU-X uses CMake to generate files for build system.

There is one CMakeLists.txt per directory, like this:

.
├── CMakeLists.txt
├── data
│   ├── CMakeLists.txt
│   ├── completions
│   │   └── CMakeLists.txt
│   ├── icons
│   │   └── CMakeLists.txt
│   └── logos
│       └── CMakeLists.txt
├── po
│   └── CMakeLists.txt
├── scripts
├── src
│   ├── bandwidth
│   │   └── CMakeLists.txt
│   ├── CMakeLists.txt
│   └── dmidecode
│       └── CMakeLists.txt
├── tests
│   ├── awk
│   ├── CMakeLists.txt
│   └── grep
│       ├── results
│       └── samples
└── vagrant

Options and common variables are defined in the main CMakeLists.txt file.

Good to know

Check if a symbol exists in a library

Example to check if msr_serialize_raw_data exists in libcpuid:

check_symbol_exists(msr_serialize_raw_data "libcpuid/libcpuid.h" HAVE_MSR_SERIALIZE_RAW_DATA)
if(HAVE_MSR_SERIALIZE_RAW_DATA)
	add_definitions(-DHAVE_MSR_SERIALIZE_RAW_DATA)
endif(HAVE_MSR_SERIALIZE_RAW_DATA)

Check if a structure has a given member

Example to check if l1_instruction_asso member exists in struct cpu_id_ in libcpuid:

check_struct_has_member("struct cpu_id_t" l1_instruction_assoc libcpuid/libcpuid.h HAVE_CPU_ID_L1I_INFO LANGUAGE C)
if(HAVE_CPU_ID_L1I_INFO)
	add_definitions(-DHAVE_CPU_ID_L1I_INFO)
endif(HAVE_CPU_ID_L1I_INFO)

Check if an enum value exists

Example to check if PURPOSE_LP_EFFICIENCY enum value exists in cpu_purpose_t in libcpuid:

check_c_source_compiles(
	"
	#include <stdio.h>
	#include <libcpuid/libcpuid.h>

	int main()
	{
		printf(\"%i\", PURPOSE_LP_EFFICIENCY);
		return 0;
	}
	"
	HAS_LIBCPUID_PURPOSE_LP_EFFICIENCY
)
if(HAS_LIBCPUID_PURPOSE_LP_EFFICIENCY)
	add_definitions(-DHAS_LIBCPUID_PURPOSE_LP_EFFICIENCY)
endif(HAS_LIBCPUID_PURPOSE_LP_EFFICIENCY)