Unable to Make Imap Library

Library downloaded from http://www.washington.edu/imap/

When trying to make the Imap library, I got the following error:

osdep.c:110: error: invalid application of ‘sizeof’ to incomplete type ‘struct pam_response’
osdep.c:111: error: dereferencing pointer to incomplete type
osdep.c:112: error: ‘PAM_PROMPT_ECHO_ON’ undeclared (first use in this function)
osdep.c:112: error: (Each undeclared identifier is reported only once
osdep.c:112: error: for each function it appears in.)
osdep.c:113: error: invalid use of undefined type ‘struct pam_response’
osdep.c:113: error: dereferencing pointer to incomplete type
osdep.c:113: error: ‘PAM_SUCCESS’ undeclared (first use in this function)
osdep.c:114: error: invalid use of undefined type ‘struct pam_response’
osdep.c:114: error: dereferencing pointer to incomplete type
osdep.c:116: error: ‘PAM_PROMPT_ECHO_OFF’ undeclared (first use in this function)
osdep.c:117: error: invalid use of undefined type ‘struct pam_response’
osdep.c:117: error: dereferencing pointer to incomplete type
osdep.c:118: error: invalid use of undefined type ‘struct pam_response’
osdep.c:118: error: dereferencing pointer to incomplete type
osdep.c:120: error: ‘PAM_TEXT_INFO’ undeclared (first use in this function)
osdep.c:121: error: ‘PAM_ERROR_MSG’ undeclared (first use in this function)
osdep.c:122: error: invalid use of undefined type ‘struct pam_response’
osdep.c:122: error: dereferencing pointer to incomplete type
osdep.c:123: error: invalid use of undefined type ‘struct pam_response’
osdep.c:123: error: dereferencing pointer to incomplete type
osdep.c:127: error: ‘PAM_CONV_ERR’ undeclared (first use in this function)
osdep.c: At top level:
osdep.c:138: error: expected ‘)’ before ‘*’ token
osdep.c: In function ‘checkpw’:
osdep.c:155: error: ‘pam_handle_t’ undeclared (first use in this function)
osdep.c:155: error: ‘hdl’ undeclared (first use in this function)
osdep.c:156: error: storage size of ‘conv’ isn’t known
osdep.c:164: error: ‘PAM_SUCCESS’ undeclared (first use in this function)
osdep.c:165: error: ‘PAM_RHOST’ undeclared (first use in this function)
osdep.c:168: error: ‘PAM_ESTABLISH_CRED’ undeclared (first use in this function)
osdep.c:184: error: ‘checkpw_cleanup’ undeclared (first use in this function)

In order to fix this, you need to install pam-devel