Binary compatibility report for the libmemcached library between 0.23 and 0.25 versions on x86

Test Info

Library Name	libmemcached
Version #1	0.23
Version #2	0.25
CPU Type	x86
GCC Version	4.6.1

Test Results

Total Header Files	11
Total Shared Libraries	1
Total Symbols / Types	63 / 75
Verdict	Incompatible (40.5%)

Problem Summary

	Severity	Count
Added Symbols	-	8
Removed Symbols	High	1
Problems with Data Types	High	0
	Medium	3
	Low	6
Problems with Symbols	High	0
	Medium	0
	Low	4
Problems with Constants	Low	0
Other Changes in Data Types	-	5
Other Changes in Constants	-	1

Added Symbols (8)

memcached.h, libmemcached.so.2.0.0
memcached_server_add_udp_with_weight ( memcached_st* ptr, char const* hostname, unsigned int port, uint32_t weight )
memcached_server_add_unix_socket_with_weight ( memcached_st* ptr, char const* filename, uint32_t weight )
memcached_server_add_with_weight ( memcached_st* ptr, char const* hostname, unsigned int port, uint32_t weight )
memcached_server_list_append_with_weight ( memcached_server_st* ptr, char const* hostname, unsigned int port, uint32_t weight, enum memcached_return* error )

memcached_server.h, libmemcached.so.2.0.0
memcached_server_by_key ( memcached_st* ptr, char const* key, size_t key_length, enum memcached_return* error )
memcached_server_clone ( memcached_server_st* clone, memcached_server_st* ptr )
memcached_server_create ( memcached_st* memc, memcached_server_st* ptr )
memcached_server_free ( memcached_server_st* ptr )

to the top

Removed Symbols (1)

memcached_string.h, libmemcached.so.2.0.0
memcached_string_backspace ( memcached_string_st* string, size_t remove )

to the top

Problems with Data Types, Medium Severity (3)

	Change	Effect
1	Field purging has been added at the middle position of this structural type.	1) Size of the inclusive type has been changed. 2) Layout of structure fields has been changed and therefore fields at higher positions of the structure definition may be incorrectly accessed by applications.
2	Type of field prefix_key has been changed from char[12] (12 bytes) to char[128] (128 bytes).	1) Size of the inclusive type has been changed. 2) Previous accesses of applications and library functions to this field and fields at higher positions of the structure definition may be broken.

	Change	Effect
1	Field is_allocated has been added at the middle position of this structural type.	1) Size of the inclusive type has been changed. 2) Layout of structure fields has been changed and therefore fields at higher positions of the structure definition may be incorrectly accessed by applications.

memcached.h
[+] struct memcached_st (2)

memcached_server.h
[+] struct memcached_server_st (1)

to the top

Problems with Data Types, Low Severity (6)

	Change	Effect
1	Field io_bytes_watermark has been added to this type.	1) This field will not be initialized by old clients. 2) Size of the inclusive type has been changed. NOTE: this field should be accessed only from the new library functions, otherwise it may result in crash or incorrect behavior of applications.
2	Field io_msg_watermark has been added to this type.	1) This field will not be initialized by old clients. 2) Size of the inclusive type has been changed. NOTE: this field should be accessed only from the new library functions, otherwise it may result in crash or incorrect behavior of applications.
3	Size of this type has been changed from 432 bytes to 560 bytes.	The fields or parameters of such data type may be incorrectly initialized or accessed by old client applications.

	Change	Effect
1	Field io_bytes_sent has been added to this type.	1) This field will not be initialized by old clients. 2) Size of the inclusive type has been changed. NOTE: this field should be accessed only from the new library functions, otherwise it may result in crash or incorrect behavior of applications.
2	Field weight has been added to this type.	1) This field will not be initialized by old clients. 2) Size of the inclusive type has been changed. NOTE: this field should be accessed only from the new library functions, otherwise it may result in crash or incorrect behavior of applications.
3	Size of this type has been changed from 16528 bytes to 16540 bytes.	The fields or parameters of such data type may be incorrectly initialized or accessed by old client applications.

memcached.h
[+] struct memcached_st (3)

memcached_server.h
[+] struct memcached_server_st (3)

to the top

Problems with Symbols, Low Severity (4)

	Change	Effect
1	Type of 2nd parameter hostname has been changed from char* to char const*.	Replacement of parameter data type may indicate a change in its semantic meaning.

	Change	Effect
1	Type of 2nd parameter hostname has been changed from char* to char const*.	Replacement of parameter data type may indicate a change in its semantic meaning.

	Change	Effect
1	Type of 2nd parameter filename has been changed from char* to char const*.	Replacement of parameter data type may indicate a change in its semantic meaning.

	Change	Effect
1	Type of 2nd parameter hostname has been changed from char* to char const*.	Replacement of parameter data type may indicate a change in its semantic meaning.

memcached.h, libmemcached.so.2.0.0
[+] memcached_server_add ( memcached_st* ptr, char* hostname, unsigned int port ) (1)
[+] memcached_server_add_udp ( memcached_st* ptr, char* hostname, unsigned int port ) (1)
[+] memcached_server_add_unix_socket ( memcached_st* ptr, char* filename ) (1)
[+] memcached_server_list_append ( memcached_server_st* ptr, char* hostname, unsigned int port, enum memcached_return* error ) (1)

to the top

Other Changes in Data Types (5)

	Change	Effect
1	The member MEMCACHED_BEHAVIOR_HASH_WITH_PREFIX_KEY with value 24 has been added.	No effect.
2	The member MEMCACHED_BEHAVIOR_IO_BYTES_WATERMARK with value 23 has been added.	No effect.
3	The member MEMCACHED_BEHAVIOR_IO_MSG_WATERMARK with value 22 has been added.	No effect.

	Change	Effect
1	The member MEMCACHED_HASH_JENKINS with value 9 has been added.	No effect.

	Change	Effect
1	The member MEMCACHED_DISTRIBUTION_RANDOM with value 3 has been added.	No effect.

memcached_constants.h
[+] enum memcached_behavior (3)
[+] enum memcached_hash (1)
[+] enum memcached_server_distribution (1)

to the top

Other Changes in Constants (1)

	Change	Effect
1	The constant MEMCACHED_POINTS_PER_SERVER_KETAMA with value 160 has been added.	No effect.

memcached_constants.h
[+] MEMCACHED_POINTS_PER_SERVER_KETAMA

to the top

Header Files (11)

libmemcached_config.h
memcached.h
memcached.hh
memcached_constants.h
memcached_get.h
memcached_result.h
memcached_server.h
memcached_storage.h
memcached_string.h
memcached_types.h
memcached_watchpoint.h

to the top

Shared Libraries (1)

libmemcached.so.2.0.0

to the top