ajay@latitude-3480:~$ uname -a
Linux latitude-3480 4.13.0-38-generic #43~16.04.1-Ubuntu SMP Wed Mar 14 17:48:43 UTC 2018 x86_64 x86_64 x86_64 GNU/Linux

ajay@latitude-3480:~/wolfssl$ ./autogen.sh 
autoreconf: Entering directory `.'
autoreconf: configure.ac: not using Gettext
autoreconf: running: aclocal --force -I m4
autoreconf: configure.ac: tracing
autoreconf: running: libtoolize --copy --force
libtoolize: putting auxiliary files in AC_CONFIG_AUX_DIR, 'build-aux'.
libtoolize: copying file 'build-aux/ltmain.sh'
libtoolize: putting macros in AC_CONFIG_MACRO_DIRS, 'm4'.
libtoolize: copying file 'm4/libtool.m4'
libtoolize: copying file 'm4/ltoptions.m4'
libtoolize: copying file 'm4/ltsugar.m4'
libtoolize: copying file 'm4/ltversion.m4'
libtoolize: copying file 'm4/lt~obsolete.m4'
autoreconf: running: /usr/bin/autoconf --force
autoreconf: running: /usr/bin/autoheader --force
autoreconf: running: automake --add-missing --copy --force-missing
configure.ac:21: installing 'build-aux/compile'
configure.ac:26: installing 'build-aux/missing'
Makefile.am: installing 'build-aux/depcomp'
autoreconf: Leaving directory `.'
ajay@latitude-3480:~/wolfssl$
ajay@latitude-3480:~/wolfssl$
ajay@latitude-3480:~/wolfssl$
ajay@latitude-3480:~/wolfssl$ ./configure 
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 we are using the GNU C compiler... yes
checking whether gcc accepts -g... yes
checking for gcc option to accept ISO C89... none needed
checking whether gcc understands -c and -o together... yes
configure: error: cannot run /bin/bash build-aux/config.sub

ajay@latitude-3480:~/wolfssl$ /bin/bash build-aux/config.sub
build-aux/config.sub: line 95: syntax error near unexpected token `)'
build-aux/config.sub: line 95: `    *local*)'