env
============================
OSTYPE=FreeBSD
MACHTYPE=x86_64
CC=clang
CLICOLOR=
XAUTHORITY=/home/blubee/.Xauthority
MAIL=/var/mail/blubee
PATH=/sbin:/bin:/usr/sbin:/usr/bin:/usr/local/sbin:/usr/local/bin:/home/blubee/bin
EDITOR=vi
LDFLAGS=-L/usr/local/lib
LD_LIBRARY_PATH=/usr/local/llvm38/lib
CPPFLAGS=-I/usr/local/include
USER=blubee
CXX=clang++
SHELL=/bin/tcsh
HOSTTYPE=FreeBSD
CFLAGS=-I/usr/local/include


./configure --prefix=/tmp
checking for a BSD-compatible install... /usr/bin/install -c
checking whether build environment is sane... yes
checking for a thread-safe mkdir -p... /usr/local/bin/gmkdir -p
checking for gawk... gawk
checking whether make sets $(MAKE)... yes
checking whether make supports nested variables... yes
checking for gcc... clang
checking whether the C compiler works... yes
checking for C compiler default output file name... a.out
checking for suffix of executables...
checking whether we are cross compiling... no
checking for suffix of object files... o
checking whether we are using the GNU C compiler... yes
checking whether clang accepts -g... yes
checking for clang option to accept ISO C89... none needed
checking whether clang understands -c and -o together... yes
checking for style of include used by make... GNU
checking dependency style of clang... gcc3
checking whether ln -s works... yes
checking build system type... amd64-unknown-freebsd12.0
checking host system type... amd64-unknown-freebsd12.0
checking how to print strings... printf
checking for a sed that does not truncate output... /usr/local/bin/gsed
checking for grep that handles long lines and -e... /usr/bin/grep
checking for egrep... /usr/bin/grep -E
checking for fgrep... /usr/bin/grep -F
checking for ld used by clang... /usr/bin/ld
checking if the linker (/usr/bin/ld) is GNU ld... yes
checking for BSD- or MS-compatible name lister (nm)... /usr/local/bin/nm -B
checking the name lister (/usr/local/bin/nm -B) interface... BSD nm
checking the maximum length of command line arguments... 196608
checking how to convert amd64-unknown-freebsd12.0 file names to amd64-unknown-freebsd12.0 format... func_convert_file_noop
checking how to convert amd64-unknown-freebsd12.0 file names to toolchain format... func_convert_file_noop
checking for /usr/bin/ld option to reload object files... -r
checking for objdump... objdump
checking how to recognize dependent libraries... pass_all
checking for dlltool... no
checking how to associate runtime and link libraries... printf %s\n
checking for ar... ar
checking for archiver @FILE support... no
checking for strip... strip
checking for ranlib... ranlib
checking command to parse /usr/local/bin/nm -B output from clang object... ok
checking for sysroot... no
checking for a working dd... /bin/dd
checking how to truncate binary pipes... /bin/dd bs=4096 count=1
checking for mt... mt
checking if mt is a manifest tool... no
checking how to run the C preprocessor... clang -E
checking for ANSI C header files... yes
checking for sys/types.h... yes
checking for sys/stat.h... yes
checking for stdlib.h... yes
checking for string.h... yes
checking for memory.h... yes
checking for strings.h... yes
checking for inttypes.h... yes
checking for stdint.h... yes
checking for unistd.h... yes
checking for dlfcn.h... yes
checking for objdir... .libs
checking if clang supports -fno-rtti -fno-exceptions... yes
checking for clang option to produce PIC... -fPIC -DPIC
checking if clang PIC flag -fPIC -DPIC works... yes
checking if clang static flag -static works... yes
checking if clang supports -c -o file.o... yes
checking if clang supports -c -o file.o... (cached) yes
checking whether the clang linker (/usr/bin/ld) supports shared libraries... yes
checking whether -lc should be explicitly linked in... no
checking dynamic linker characteristics... freebsd12.0 ld.so
checking how to hardcode library paths into programs... immediate
checking whether stripping libraries is possible... no
checking if libtool supports shared libraries... yes
checking whether to build shared libraries... yes
checking whether to build static libraries... yes
checking for dlopen in -ldl... no
checking for ANSI C header files... (cached) yes
checking fcntl.h usability... yes
checking fcntl.h presence... yes
checking for fcntl.h... yes
checking for stdlib.h... (cached) yes

make error
/bin/sh ../libtool  --tag=CC    --mode=link clang  -O2   -L/usr/local/lib -o epson_inkjet_printer_filter main.o  raster_to_epson.o -ldl  -lstdc++  -lcupsimage -lcups -ljpeg -lm  ./memory/libmemory.la  ./pagemanager/libpagemanager.la  ./filteropt/libfilteropt.la  ./raster/libraster.la
libtool: link: clang -O2 -o epson_inkjet_printer_filter main.o raster_to_epson.o  -L/usr/local/lib -ldl -lstdc++ -lcupsimage -lcups -ljpeg -lm ./memory/.libs/libmemory.a ./pagemanager/.libs/libpagemanager.a ./filteropt/.libs/libfilteropt.a ./raster/.libs/libraster.a
/usr/bin/ld: cannot find -ldl
clang: error: linker command failed with exit code 1 (use -v to see invocation)
*** Error code 1

Stop.
make[3]: stopped
*** Error code 1