Hi I have a compilation error with setenv api redefinition in krb code and system header files on AIX 5.1 with gcc 3.4.4 [2.95 also] compiler. The message looks like this, for any other information I will happy to provide you. I hope you are the right person to forward all errors in future, otherwise let me know. Anyway I was able to compile the beta2 release on Linux [RedHat 32 Bit, Fedura 64 Bit], SGI-IRIX 32/64 Bit, AIX [32 Bit compilation error], MAC-OSX [32 Bit], HP-UX 11.11 [32/64 Bit] SOALARIS SPARC [32/64 Bit] SOLARIS INTEL [32 Bit] Windows 2000 [32 Bit, after your Makefile modification] I looked into the problem and found that in compilation the -DHAVE_SETENV=1 and -DNEED_SETENV=1 are going in and ./libtelnet/forward.c has code like #include "krb5.h" #include #include "krb5forw.h" #if defined(NEED_SETENV) || defined(NEED_SETENV_PROTO) extern int setenv(char *, char *, int); #endif Redefines the system's prototype which is extern int setenv(const char *, const char *, int); COMPILATION ERROR MESSAGE: making all in appl/telnet/libtelnet... gmake[4]: Entering directory `/home/srbpkg/srbpkg/kerberos/32/krb5-1.4-beta2/src/appl/telnet/libtelnet' gcc -DPACKAGE_NAME=\"\" -DPACKAGE_TARNAME=\"\" -DPACKAGE_VERSION=\"\" -DPACKAGE_STRING=\"\" -DPACKAGE_BUGREPORT=\"\" -DKRB5_KRB4_COMPAT=1 -DHAVE_BT_RSEQ=1 -DKRB5_PRIVATE=1 -DKRB5_DEPRECATED=1 -DKRB5_DNS_LOOKUP_KDC=1 -DKRB5_DNS_LOOKUP=1 -DHAVE_RES_NSEARCH=1 -DHAVE_RES_SEARCH=1 -DHAVE_NS_INITPARSE=1 -DHAVE_NS_NAME_UNCOMPRESS=1 -DHAVE_DN_SKIPNAME=1 -DDELAY_INITIALIZER=1 -DCONSTRUCTOR_ATTR_WORKS=1 -DDESTRUCTOR_ATTR_WORKS=1 -DUSE_LINKER_FINI_OPTION=1 -DENABLE_THREADS=1 -DHAVE_PTHREAD=1 -DHAVE_PTHREAD_ONCE=1 -DHAVE_PTHREAD_RWLOCK_INIT=1 -DHAVE_PTHREAD_RWLOCK_INIT_IN_THREAD_LIB=1 -DHAVE_STRCASECMP=1 -DHAVE_STRDUP=1 -DHAVE_SETSID=1 -DHAVE_STRERROR=1 -DHAVE_STRFTIME=1 -DHAVE_GETOPT=1 -DHAVE_HERROR=1 -DHAVE_SETENV=1 -DHAVE_GETENV=1 -DHAVE_VSNPRINTF=1 -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_UNISTD_H=1 -DHAVE_STDLIB_H=1 -DHAVE_STRING_H=1 -DHAVE_UNISTD_H=1 -DHAVE_ARPA_NAMESER_H=1 -DHAVE_SYS_SELECT_H=1 -DHAVE_ARPA_INET_H=1 -DHAVE_CURSES_H=1 -DHAVE_UTMP_H=1 -DHAVE_SYS_TIME_H=1 -DHAVE_SYS_STREAM_H=1 -DHAVE_SYS_UTSNAME_H=1 -DHAVE_MEMORY_H=1 -DNEED_SETENV=1 -DKRB4=1 -DHAVE_UNISTD_H=1 -DHAVE_FORK=1 -DHAVE_VFORK=1 -DHAVE_WORKING_VFORK=1 -DHAVE_WORKING_FORK=1 -DHAVE_STDARG_H=1 -DHAVE_TERM_H=1 -DHAVE_SA_LEN=1 -DHAVE_STRUCT_SOCKADDR_STORAGE=1 -DHAVE_SYS_TYPES_H=1 -DHAVE_SYS_SOCKET_H=1 -DHAVE_NETINET_IN_H=1 -DHAVE_NETDB_H=1 -DHAVE_INET_NTOP=1 -DHAVE_INET_PTON=1 -DHAVE_GETNAMEINFO=1 -DHAVE_GETADDRINFO=1 -DKRB5_USE_INET6=1 -DHAVE_SETUPTERM=1 -DUSE_TERMIO=1 -DNEED_PARSETOS_PROTO=1 -DNEED_HERROR_PROTO=1 -DPOSIX_SIGNALS=1 -DKRB4=1 -DHAVE_REGCOMP=1 -DTIME_WITH_SYS_TIME=1 -DSTREAMSPTY=1 -DNEED_UNSETENV_PROTO=1 -DAUTHENTICATION -DENCRYPTION -DDES_ENCRYPTION -DKRB5 -DFORWARD -UNO_LOGIN_F -DLOGIN_CAP_F -DLOGIN_PROGRAM=KRB5_PATH_LOGIN -I../../../include -I./../../../include -I../../../include/krb5 -I./../../../include/krb5 -I.. -I./.. -I./../../../include/kerberosIV -I../../../include/kerberosIV -D_THREAD_SAFE -c forward.c forward.c:39: error: conflicting types for `setenv' /usr/local/lib/gcc-lib/powerpc-ibm-aix5.1.0.0/3.3.4/include/stdlib.h:480: error: previous declaration of `setenv' gmake[4]: *** [forward.o] Error 1 gmake[4]: Leaving directory `/home/srbpkg/srbpkg/kerberos/32/krb5-1.4-beta2/src/appl/telnet/libtelnet' gmake[3]: *** [all-recurse] Error 1 gmake[3]: Leaving directory `/home/srbpkg/srbpkg/kerberos/32/krb5-1.4-beta2/src/appl/telnet' gmake[2]: *** [all-recurse] Error 1 gmake[2]: Leaving directory `/home/srbpkg/srbpkg/kerberos/32/krb5-1.4-beta2/src/appl' gmake[1]: *** [all-recurse] Error 1 gmake[1]: Leaving directory `/home/srbpkg/srbpkg/kerberos/32/krb5-1.4-beta2/src' gmake: *** [krb32] Error 2