ld: error: undefined symbol:

[ericbsd]

I fix the error below, but it still failed.

echo pam_helper.full: /usr/lib/libc.a /usr/lib/libpam.a >> .depend
Warning: Object directory not changed from original /usr/home/ericbsd/Desktop/bsd-pam-helper-1.2
cc  -O2 -pipe   -g -MD  -MF.depend.pam_helper.o -MTpam_helper.o -std=gnu99 -Wno-format-zero-length -nobuiltininc -idirafter /usr/lib/clang/12.0.1/include -fstack-protector-strong -Wsystem-headers -Werror -Wall -Wno-format-y2k -W -Wno-unused-parameter -Wstrict-prototypes -Wmissing-prototypes -Wpointer-arith -Wreturn-type -Wcast-qual -Wwrite-strings -Wswitch -Wshadow -Wunused-parameter -Wcast-align -Wchar-subscripts -Wnested-externs -Wredundant-decls -Wold-style-definition -Wno-pointer-sign -Wmissing-variable-declarations -Wthread-safety -Wno-empty-body -Wno-string-plus-int -Wno-unused-const-variable  -Qunused-arguments    -c pam_helper.c -o pam_helper.o
pam_helper.c:93:18: error: comparison of integers of different signs: 'ssize_t' (aka 'long') and 'size_t' (aka 'unsigned long') [-Werror,-Wsign-compare]
                        if (num_write != msg_len) {
                            ~~~~~~~~~ ^  ~~~~~~~
pam_helper.c:116:17: error: comparison of integers of different signs: 'ssize_t' (aka 'long') and 'size_t' (aka 'unsigned long') [-Werror,-Wsign-compare]
                        if (num_read == msg_len)
                            ~~~~~~~~ ^  ~~~~~~~
2 errors generated.
*** Error code 1

Stop.
make: stopped in /usr/home/ericbsd/Desktop/bsd-pam-helper-1.2 

Something is wrong with pam_start, pam_authenticate, pam_acct_mgmt, pam_setcred and pam_end

rm -f .depend
echo pam_helper.full: /usr/lib/libc.a /usr/lib/libpam.a >> .depend
Warning: Object directory not changed from original /usr/home/ericbsd/Desktop/bsd-pam-helper-1.2
cc  -O2 -pipe   -g -MD  -MF.depend.pam_helper.o -MTpam_helper.o -std=gnu99 -Wno-format-zero-length -nobuiltininc -idirafter /usr/lib/clang/12.0.1/include -fstack-protector-strong -Wsystem-headers -Werror -Wall -Wno-format-y2k -W -Wno-unused-parameter -Wstrict-prototypes -Wmissing-prototypes -Wpointer-arith -Wreturn-type -Wcast-qual -Wwrite-strings -Wswitch -Wshadow -Wunused-parameter -Wcast-align -Wchar-subscripts -Wnested-externs -Wredundant-decls -Wold-style-definition -Wno-pointer-sign -Wmissing-variable-declarations -Wthread-safety -Wno-empty-body -Wno-string-plus-int -Wno-unused-const-variable  -Qunused-arguments    -c pam_helper.c -o pam_helper.o
cc -O2 -pipe -g -std=gnu99 -Wno-format-zero-length -nobuiltininc -idirafter /usr/lib/clang/12.0.1/include -fstack-protector-strong -Wsystem-headers -Werror -Wall -Wno-format-y2k -W -Wno-unused-parameter -Wstrict-prototypes -Wmissing-prototypes -Wpointer-arith -Wreturn-type -Wcast-qual -Wwrite-strings -Wswitch -Wshadow -Wunused-parameter -Wcast-align -Wchar-subscripts -Wnested-externs -Wredundant-decls -Wold-style-definition -Wno-pointer-sign -Wmissing-variable-declarations -Wthread-safety -Wno-empty-body -Wno-string-plus-int -Wno-unused-const-variable -Qunused-arguments    -o pam_helper.full pam_helper.o   
ld: error: undefined symbol: pam_start
>>> referenced by pam_helper.c:141
>>>               pam_helper.o:(main)

ld: error: undefined symbol: pam_authenticate
>>> referenced by pam_helper.c:149
>>>               pam_helper.o:(main)

ld: error: undefined symbol: pam_acct_mgmt
>>> referenced by pam_helper.c:153
>>>               pam_helper.o:(main)

ld: error: undefined symbol: pam_setcred
>>> referenced by pam_helper.c:154
>>>               pam_helper.o:(main)

ld: error: undefined symbol: pam_end
>>> referenced by pam_helper.c:164
>>>               pam_helper.o:(main)
cc: error: linker command failed with exit code 1 (use -v to see invocation)
*** Error code 1

Stop.
make: stopped in /usr/home/ericbsd/Desktop/bsd-pam-helper-1.2

I looked at the manual for it and it should be working unless there is something missing.
Here is the pam_start manual https://www.freebsd.org/cgi/man.cgi?query=pam_start&sektion=3&apropos=0&manpath=FreeBSD+13.0-RELEASE+and+Ports.

[ericbsd]

I will make a PR shortly.