cyrus-sasl2 @2.1.25_4 doesn't contain LOGIN/PLAIN mechanism

[congling@…]

Compile and run the following code after install cyrus-sasl2, it would show just "EXTERNAL". But when using cyrus-sasl 2.1.26 source from ​ftp://ftp.cyrusimap.org/cyrus-sasl/cyrus-sasl-2.1.26.tar.gz, it would return the following mechanism. This issue will let the svn client unable to connect to the server with LOGIN/PLAIN authentication mechanism

mech:EXTERNAL
mech:APOP
mech:DHX
mech:WEBDAV-DIGEST
mech:ANONYMOUS
mech:CRAM-MD5
mech:DIGEST-MD5
mech:GSSAPI
mech:LOGIN
mech:NTLM
mech:OTP
mech:PLAIN
mech:PPS
mech:MS-CHAPv2
mech:SMB-NT
mech:SMB-NTLMv2

source code:

#include <stdio.h>
#include <sasl/sasl.h>

int main(){
        const char* np;
	const char** p;
	int result;
	
	result=sasl_client_init(NULL);
            
       /* check to see if that worked */
        if (result!=SASL_OK) {
		printf("failed to init\n");
		return 1;
	}
	else
		printf("success to init\n");
	p = sasl_global_listmech();
        for (np= *p; np != NULL; np=*(++p)) {
            printf("mech:%s\n",np);
        }

	return 0;
}