Can't get lmdb to build on FreeBSD 12

[Russell Haley <russ.haley@gmail.com>]

Hi,

Sorry for the silly question, but I've stumped myself and my C is
weak. Normally lmdb builds fine without issue on most of the platforms
I try (Debian Jessie, FreeBSD 10.3 & 12), but it's stopped compiling
on my TrueOS box, which is FreeBSD 12. I've tried gcc and clang 4.0
and 3.9.
------------------------

russellh@prescott:~/Git/lmdb/libraries/liblmdb% make
cc -pthread -O2 -g -W -Wall -Wno-unused-parameter -Wbad-function-cast
-Wuninitialized  -v mdb_stat.c  -o mdb_stat
FreeBSD clang version 4.0.0 (tags/RELEASE_400/final 297347) (based on
LLVM 4.0.0)
Target: x86_64-unknown-freebsd12.0
Thread model: posix
InstalledDir: /usr/bin
 "/usr/bin/cc" -cc1 -triple x86_64-unknown-freebsd12.0 -emit-obj
-disable-free -main-file-name mdb_stat.c -mrelocation-model static
-mthread-model posix -mdisable-fp-elim -masm-verbose
-mconstructor-aliases -munwind-tables -target-cpu x86-64 -v
-dwarf-column-info -debug-info-kind=standalone -dwarf-version=2
-debugger-tuning=gdb -resource-dir /usr/bin/../lib/clang/4.0.0 -O2 -W
-Wall -Wno-unused-parameter -Wbad-function-cast -Wuninitialized
-fdebug-compilation-dir /usr/home/russellh/Git/lmdb/libraries/liblmdb
-ferror-limit 19 -fmessage-length 237 -pthread -fobjc-runtime=gnustep
-fdiagnostics-show-option -vectorize-loops -vectorize-slp -o
/tmp/mdb_stat-852384.o -x c mdb_stat.c
clang -cc1 version 4.0.0 based upon LLVM 4.0.0 default target
x86_64-unknown-freebsd12.0
#include "..." search starts here:
#include <...> search starts here:
 /usr/bin/../lib/clang/4.0.0/include
 /usr/include
End of search list.
 "/usr/bin/ld" --eh-frame-hdr -dynamic-linker /libexec/ld-elf.so.1
--hash-style=both --enable-new-dtags -o mdb_stat /usr/lib/crt1.o
/usr/lib/crti.o /usr/lib/crtbegin.o -L/usr/lib /tmp/mdb_stat-852384.o
-lgcc --as-needed -lgcc_s --no-as-needed -lpthread -lc -lgcc
--as-needed -lgcc_s --no-as-needed /usr/lib/crtend.o /usr/lib/crtn.o
/tmp/mdb_stat-852384.o: In function `main':
/usr/home/russellh/Git/lmdb/libraries/liblmdb/mdb_stat.c:104:
undefined reference to `mdb_env_create'
/usr/home/russellh/Git/lmdb/libraries/liblmdb/mdb_stat.c:106:
undefined reference to `mdb_strerror'
/usr/home/russellh/Git/lmdb/libraries/liblmdb/mdb_stat.c:111:
undefined reference to `mdb_env_set_maxdbs'
/usr/home/russellh/Git/lmdb/libraries/liblmdb/mdb_stat.c:114:
undefined reference to `mdb_env_open'
/usr/home/russellh/Git/lmdb/libraries/liblmdb/mdb_stat.c:116:
undefined reference to `mdb_strerror'
/usr/home/russellh/Git/lmdb/libraries/liblmdb/mdb_stat.c:121:
undefined reference to `mdb_env_stat'
/usr/home/russellh/Git/lmdb/libraries/liblmdb/mdb_stat.c:122:
undefined reference to `mdb_env_info'
/usr/home/russellh/Git/lmdb/libraries/liblmdb/mdb_stat.c:136:
undefined reference to `mdb_reader_list'
/usr/home/russellh/Git/lmdb/libraries/liblmdb/mdb_stat.c:139:
undefined reference to `mdb_reader_check'
/usr/home/russellh/Git/lmdb/libraries/liblmdb/mdb_stat.c:141:
undefined reference to `mdb_reader_list'
/usr/home/russellh/Git/lmdb/libraries/liblmdb/mdb_stat.c:147:
undefined reference to `mdb_txn_begin'
/usr/home/russellh/Git/lmdb/libraries/liblmdb/mdb_stat.c:149:
undefined reference to `mdb_strerror'
/usr/home/russellh/Git/lmdb/libraries/liblmdb/mdb_stat.c:257:
undefined reference to `mdb_env_close'
/usr/home/russellh/Git/lmdb/libraries/liblmdb/mdb_stat.c:160:
undefined reference to `mdb_cursor_open'
/usr/home/russellh/Git/lmdb/libraries/liblmdb/mdb_stat.c:162:
undefined reference to `mdb_strerror'
/usr/home/russellh/Git/lmdb/libraries/liblmdb/mdb_stat.c:165:
undefined reference to `mdb_stat'
/usr/home/russellh/Git/lmdb/libraries/liblmdb/mdb_stat.c:171:
undefined reference to `mdb_cursor_get'
/usr/home/russellh/Git/lmdb/libraries/liblmdb/mdb_stat.c:171:
undefined reference to `mdb_cursor_get'
/usr/home/russellh/Git/lmdb/libraries/liblmdb/mdb_stat.c:199:
undefined reference to `mdb_cursor_close'
/usr/home/russellh/Git/lmdb/libraries/liblmdb/mdb_stat.c:203:
undefined reference to `mdb_dbi_open'
/usr/home/russellh/Git/lmdb/libraries/liblmdb/mdb_stat.c:205:
undefined reference to `mdb_strerror'
/usr/home/russellh/Git/lmdb/libraries/liblmdb/mdb_stat.c:209:
undefined reference to `mdb_stat'
/usr/home/russellh/Git/lmdb/libraries/liblmdb/mdb_stat.c:(.text+0x5d6):
undefined reference to `mdb_strerror'
/usr/home/russellh/Git/lmdb/libraries/liblmdb/mdb_stat.c:255:
undefined reference to `mdb_txn_abort'
/usr/home/russellh/Git/lmdb/libraries/liblmdb/mdb_stat.c:221:
undefined reference to `mdb_cursor_open'
/usr/home/russellh/Git/lmdb/libraries/liblmdb/mdb_stat.c:223:
undefined reference to `mdb_strerror'
/usr/home/russellh/Git/lmdb/libraries/liblmdb/mdb_stat.c:226:
undefined reference to `mdb_cursor_get'
/usr/home/russellh/Git/lmdb/libraries/liblmdb/mdb_stat.c:234:
undefined reference to `mdb_dbi_open'
/usr/home/russellh/Git/lmdb/libraries/liblmdb/mdb_stat.c:239:
undefined reference to `mdb_stat'
/usr/home/russellh/Git/lmdb/libraries/liblmdb/mdb_stat.c:245:
undefined reference to `mdb_dbi_close'
/usr/home/russellh/Git/lmdb/libraries/liblmdb/mdb_stat.c:226:
undefined reference to `mdb_cursor_get'
/usr/home/russellh/Git/lmdb/libraries/liblmdb/mdb_stat.c:247:
undefined reference to `mdb_cursor_close'
/usr/home/russellh/Git/lmdb/libraries/liblmdb/mdb_stat.c:253:
undefined reference to `mdb_dbi_close'
/usr/home/russellh/Git/lmdb/libraries/liblmdb/mdb_stat.c:241:
undefined reference to `mdb_strerror'
cc: error: linker command failed with exit code 1 (use -v to see
invocation)
*** Error code 1

Stop.
make: stopped in /usr/home/russellh/Git/lmdb/libraries/liblmdb

----------------------------------
The full output is here with uname, git status and compiler info:
http://termbin.com/io9d

Any help would be grand.

Thanks,
Russ