Need help compiling

[Qintiy]

I followed the instructions and cant compile the pam
I got this far

root@ovpn:/home/user/linotp-auth-pam# autoconf configure.ac:39: warning: The macro AC_PROG_LIBTOOL' is obsolete.
configure.ac:39: You should run autoupdate.
m4/libtool.m4:99: AC_PROG_LIBTOOL is expanded from...
configure.ac:39: the top level
configure.ac:46: warning: The macro AC_HEADER_STDC' is obsolete. configure.ac:46: You should run autoupdate. ./lib/autoconf/headers.m4:704: AC_HEADER_STDC is expanded from... configure.ac:46: the top level root@ovpn:/home/user/linotp-auth-pam# ./co compile config.guess config.sub configure root@ovpn:/home/user/linotp-auth-pam# ./configure checking build system type... x86_64-pc-linux-gnu checking host system type... x86_64-pc-linux-gnu checking target system type... x86_64-pc-linux-gnu checking for a BSD-compatible install... /usr/bin/install -c checking whether build environment is sane... yes checking for a race-free mkdir -p... /usr/bin/mkdir -p checking for gawk... no checking for mawk... mawk checking whether make sets $(MAKE)... yes checking whether make supports nested variables... yes checking whether to enable maintainer-specific portions of Makefiles... no checking for gcc... gcc 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 the compiler supports GNU C... yes checking whether gcc accepts -g... yes checking for gcc option to enable C11 features... none needed checking whether gcc understands -c and -o together... yes checking whether make supports the include directive... yes (GNU style) checking dependency style of gcc... gcc3 checking for g++... g++ checking whether the compiler supports GNU C++... yes checking whether g++ accepts -g... yes checking for g++ option to enable C++11 features... none needed checking dependency style of g++... gcc3 checking how to print strings... printf checking for a sed that does not truncate output... /usr/bin/sed 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 gcc... /usr/bin/ld checking if the linker (/usr/bin/ld) is GNU ld... yes checking for BSD- or MS-compatible name lister (nm)... /usr/bin/nm -B checking the name lister (/usr/bin/nm -B) interface... BSD nm checking whether ln -s works... yes checking the maximum length of command line arguments... 1572864 checking how to convert x86_64-pc-linux-gnu file names to x86_64-pc-linux-gnu format... func_convert_file_noop checking how to convert x86_64-pc-linux-gnu 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... @ checking for strip... strip checking for ranlib... ranlib checking command to parse /usr/bin/nm -B output from gcc object... ok checking for sysroot... no checking for a working dd... /usr/bin/dd checking how to truncate binary pipes... /usr/bin/dd bs=4096 count=1 checking for mt... mt checking if mt is a manifest tool... no checking for stdio.h... yes checking for stdlib.h... yes checking for string.h... yes checking for inttypes.h... yes checking for stdint.h... yes checking for strings.h... yes checking for sys/stat.h... yes checking for sys/types.h... yes checking for unistd.h... yes checking for dlfcn.h... yes checking for objdir... .libs checking if gcc supports -fno-rtti -fno-exceptions... no checking for gcc option to produce PIC... -fPIC -DPIC checking if gcc PIC flag -fPIC -DPIC works... yes checking if gcc static flag -static works... yes checking if gcc supports -c -o file.o... yes checking if gcc supports -c -o file.o... (cached) yes checking whether the gcc linker (/usr/bin/ld -m elf_x86_64) supports shared libraries... yes checking whether -lc should be explicitly linked in... no checking dynamic linker characteristics... GNU/Linux ld.so checking how to hardcode library paths into programs... immediate checking whether stripping libraries is possible... yes checking if libtool supports shared libraries... yes checking whether to build shared libraries... yes checking whether to build static libraries... yes checking how to run the C++ preprocessor... g++ -E checking for ld used by g++... /usr/bin/ld -m elf_x86_64 checking if the linker (/usr/bin/ld -m elf_x86_64) is GNU ld... yes checking whether the g++ linker (/usr/bin/ld -m elf_x86_64) supports shared libraries... yes checking for g++ option to produce PIC... -fPIC -DPIC checking if g++ PIC flag -fPIC -DPIC works... yes checking if g++ static flag -static works... yes checking if g++ supports -c -o file.o... yes checking if g++ supports -c -o file.o... (cached) yes checking whether the g++ linker (/usr/bin/ld -m elf_x86_64) supports shared libraries... yes checking dynamic linker characteristics... (cached) GNU/Linux ld.so checking how to hardcode library paths into programs... immediate checking whether ln -s works... yes checking for egrep... (cached) /usr/bin/grep -E checking for errno.h... yes checking for string.h... (cached) yes checking for syslog.h... yes checking for fcntl.h... yes checking for unistd.h... (cached) yes checking for security/pam_ext.h... yes checking for an ANSI C-conforming const... yes checking for size_t... yes checking for GNU libc compatible malloc... yes checking for GNU libc compatible realloc... yes checking whether lstat correctly handles trailing slash... yes checking whether stat accepts an empty string... no checking for vprintf... yes checking for memset... yes checking for strdup... yes checking for strerror... yes checking for memset_s... no checking for explicit_bzero... yes checking for gcc options needed to detect all undeclared functions... none needed checking whether memset_s is declared... no checking whether explicit_bzero is declared... yes checking for curl-config... /usr/bin/curl-config checking for pam_get_item in -lpam... yes ./configure: line 17611: syntax error near unexpected token OPENSSL,'
./configure: line 17611: PKG_CHECK_MODULES(OPENSSL, openssl, , AC_MSG_ERROR(openssl not found) )' root@ovpn:/home/user/linotp-auth-pam# make make: *** No targets specified and no makefile found. Stop.