diff --git a/src/c_wrapper/clinfo_ext.h b/src/c_wrapper/clinfo_ext.h
new file mode 100644
index 0000000000000000000000000000000000000000..6094c52c18057b81e09526f3576c11042163e942
--- /dev/null
+++ b/src/c_wrapper/clinfo_ext.h
@@ -0,0 +1,165 @@
+/* Include OpenCL header, and define OpenCL extensions, since what is and is not
+ * available in the official headers is very system-dependent */
+
+#ifndef _EXT_H
+#define _EXT_H
+
+#ifdef __APPLE__
+#include <OpenCL/opencl.h>
+#else
+#include <CL/cl.h>
+#endif
+
+/* These two defines were introduced in the 1.2 headers
+ * on 2012-11-30, so earlier versions don't have them
+ * (e.g. Debian wheezy)
+ */
+
+#ifndef CL_DEVICE_IMAGE_PITCH_ALIGNMENT
+#define CL_DEVICE_IMAGE_PITCH_ALIGNMENT 0x104A
+#define CL_DEVICE_IMAGE_BASE_ADDRESS_ALIGNMENT 0x104B
+#endif
+
+/* 2.0 headers are not very common for the time being, so
+ * let's copy the defines for the new CL_DEVICE_* properties
+ * here.
+ */
+#ifndef CL_VERSION_2_0
+#define CL_DEVICE_MAX_READ_WRITE_IMAGE_ARGS 0x104C
+#define CL_DEVICE_MAX_GLOBAL_VARIABLE_SIZE 0x104D
+#define CL_DEVICE_QUEUE_ON_DEVICE_PROPERTIES 0x104E
+#define CL_DEVICE_QUEUE_ON_DEVICE_PREFERRED_SIZE 0x104F
+#define CL_DEVICE_QUEUE_ON_DEVICE_MAX_SIZE 0x1050
+#define CL_DEVICE_MAX_ON_DEVICE_QUEUES 0x1051
+#define CL_DEVICE_MAX_ON_DEVICE_EVENTS 0x1052
+#define CL_DEVICE_SVM_CAPABILITIES 0x1053
+#define CL_DEVICE_GLOBAL_VARIABLE_PREFERRED_TOTAL_SIZE 0x1054
+#define CL_DEVICE_MAX_PIPE_ARGS 0x1055
+#define CL_DEVICE_PIPE_MAX_ACTIVE_RESERVATIONS 0x1056
+#define CL_DEVICE_PIPE_MAX_PACKET_SIZE 0x1057
+#define CL_DEVICE_PREFERRED_PLATFORM_ATOMIC_ALIGNMENT 0x1058
+#define CL_DEVICE_PREFERRED_GLOBAL_ATOMIC_ALIGNMENT 0x1059
+#define CL_DEVICE_PREFERRED_LOCAL_ATOMIC_ALIGNMENT 0x105A
+
+#define CL_DEVICE_SVM_COARSE_GRAIN_BUFFER (1 << 0)
+#define CL_DEVICE_SVM_FINE_GRAIN_BUFFER (1 << 1)
+#define CL_DEVICE_SVM_FINE_GRAIN_SYSTEM (1 << 2)
+#define CL_DEVICE_SVM_ATOMICS (1 << 3)
+
+typedef cl_bitfield cl_device_svm_capabilities;
+#endif
+
+#ifndef CL_VERSION_2_1
+#define CL_PLATFORM_HOST_TIMER_RESOLUTION 0x0905
+#define CL_DEVICE_IL_VERSION 0x105B
+#define CL_DEVICE_MAX_NUM_SUB_GROUPS 0x105C
+#define CL_DEVICE_SUB_GROUP_INDEPENDENT_FORWARD_PROGRESS 0x105D
+#endif
+
+/*
+ * Extensions
+ */
+
+/* cl_khr_icd */
+#define CL_PLATFORM_ICD_SUFFIX_KHR 0x0920
+#define CL_PLATFORM_NOT_FOUND_KHR -1001
+
+
+/* cl_khr_fp64 */
+#define CL_DEVICE_DOUBLE_FP_CONFIG 0x1032
+
+/* cl_khr_fp16 */
+#define CL_DEVICE_HALF_FP_CONFIG 0x1033
+
+/* cl_khr_terminate_context */
+#define CL_DEVICE_TERMINATE_CAPABILITY_KHR 0x200F
+
+/* cl_nv_device_attribute_query */
+#define CL_DEVICE_COMPUTE_CAPABILITY_MAJOR_NV 0x4000
+#define CL_DEVICE_COMPUTE_CAPABILITY_MINOR_NV 0x4001
+#define CL_DEVICE_REGISTERS_PER_BLOCK_NV 0x4002
+#define CL_DEVICE_WARP_SIZE_NV 0x4003
+#define CL_DEVICE_GPU_OVERLAP_NV 0x4004
+#define CL_DEVICE_KERNEL_EXEC_TIMEOUT_NV 0x4005
+#define CL_DEVICE_INTEGRATED_MEMORY_NV 0x4006
+#define CL_DEVICE_ATTRIBUTE_ASYNC_ENGINE_COUNT_NV 0x4007
+#define CL_DEVICE_PCI_BUS_ID_NV 0x4008
+#define CL_DEVICE_PCI_SLOT_ID_NV 0x4009
+
+/* cl_ext_atomic_counters_{32,64} */
+#define CL_DEVICE_MAX_ATOMIC_COUNTERS_EXT 0x4032
+
+/* cl_amd_device_attribute_query */
+#define CL_DEVICE_PROFILING_TIMER_OFFSET_AMD 0x4036
+#define CL_DEVICE_TOPOLOGY_AMD 0x4037
+#define CL_DEVICE_BOARD_NAME_AMD 0x4038
+#define CL_DEVICE_GLOBAL_FREE_MEMORY_AMD 0x4039
+#define CL_DEVICE_SIMD_PER_COMPUTE_UNIT_AMD 0x4040
+#define CL_DEVICE_SIMD_WIDTH_AMD 0x4041
+#define CL_DEVICE_SIMD_INSTRUCTION_WIDTH_AMD 0x4042
+#define CL_DEVICE_WAVEFRONT_WIDTH_AMD 0x4043
+#define CL_DEVICE_GLOBAL_MEM_CHANNELS_AMD 0x4044
+#define CL_DEVICE_GLOBAL_MEM_CHANNEL_BANKS_AMD 0x4045
+#define CL_DEVICE_GLOBAL_MEM_CHANNEL_BANK_WIDTH_AMD 0x4046
+#define CL_DEVICE_LOCAL_MEM_SIZE_PER_COMPUTE_UNIT_AMD 0x4047
+#define CL_DEVICE_LOCAL_MEM_BANKS_AMD 0x4048
+#define CL_DEVICE_THREAD_TRACE_SUPPORTED_AMD 0x4049
+#define CL_DEVICE_GFXIP_MAJOR_AMD 0x404A
+#define CL_DEVICE_GFXIP_MINOR_AMD 0x404B
+#define CL_DEVICE_AVAILABLE_ASYNC_QUEUES_AMD 0x404C
+
+#ifndef CL_DEVICE_TOPOLOGY_TYPE_PCIE_AMD
+#define CL_DEVICE_TOPOLOGY_TYPE_PCIE_AMD 1
+
+typedef union
+{
+ struct { cl_uint type; cl_uint data[5]; } raw;
+ struct { cl_uint type; cl_char unused[17]; cl_char bus; cl_char device; cl_char function; } pcie;
+} cl_device_topology_amd;
+#endif
+
+/* cl_amd_offline_devices */
+#define CL_CONTEXT_OFFLINE_DEVICES_AMD 0x403F
+
+/* cl_ext_device_fission */
+#define cl_ext_device_fission 1
+
+typedef cl_ulong cl_device_partition_property_ext;
+
+#define CL_DEVICE_PARTITION_EQUALLY_EXT 0x4050
+#define CL_DEVICE_PARTITION_BY_COUNTS_EXT 0x4051
+#define CL_DEVICE_PARTITION_BY_NAMES_EXT 0x4052
+#define CL_DEVICE_PARTITION_BY_NAMES_INTEL 0x4052 /* cl_intel_device_partition_by_names */
+#define CL_DEVICE_PARTITION_BY_AFFINITY_DOMAIN_EXT 0x4053
+
+#define CL_DEVICE_PARENT_DEVICE_EXT 0x4054
+#define CL_DEVICE_PARTITION_TYPES_EXT 0x4055
+#define CL_DEVICE_AFFINITY_DOMAINS_EXT 0x4056
+#define CL_DEVICE_REFERENCE_COUNT_EXT 0x4057
+#define CL_DEVICE_PARTITION_STYLE_EXT 0x4058
+
+#define CL_AFFINITY_DOMAIN_L1_CACHE_EXT 0x1
+#define CL_AFFINITY_DOMAIN_L2_CACHE_EXT 0x2
+#define CL_AFFINITY_DOMAIN_L3_CACHE_EXT 0x3
+#define CL_AFFINITY_DOMAIN_L4_CACHE_EXT 0x4
+#define CL_AFFINITY_DOMAIN_NUMA_EXT 0x10
+#define CL_AFFINITY_DOMAIN_NEXT_FISSIONABLE_EXT 0x100
+
+/* cl_intel_advanced_motion_estimation */
+#define CL_DEVICE_ME_VERSION_INTEL 0x407E
+
+/* cl_qcom_ext_host_ptr */
+#define CL_DEVICE_EXT_MEM_PADDING_IN_BYTES_QCOM 0x40A0
+#define CL_DEVICE_PAGE_SIZE_QCOM 0x40A1
+
+/* cl_khr_spir */
+#define CL_DEVICE_SPIR_VERSIONS 0x40E0
+
+/* cl_altera_device_temperature */
+#define CL_DEVICE_CORE_TEMPERATURE_ALTERA 0x40F3
+
+/* cl_intel_simultaneous_sharing */
+#define CL_DEVICE_SIMULTANEOUS_INTEROPS_INTEL 0x4104
+#define CL_DEVICE_NUM_SIMULTANEOUS_INTEROPS_INTEL 0x4105
+
+#endif