--- /dev/null
+From 5009fc3c273622c35a31ba5d600124117b484fd9 Mon Sep 17 00:00:00 2001
+From: Corey Minyard <cminyard@mvista.com>
+Date: Sun, 26 Jan 2020 21:26:07 -0600
+Subject: [PATCH] configure: Modify --with-openssl to take yes and no
+
+Allow openssl to be disabled with --with-openssl=no. Otherwise works as
+before.
+
+Signed-off-by: Corey Minyard <cminyard@mvista.com>
+[Retrieved from:
+https://github.com/cminyard/gensio/commit/5009fc3c273622c35a31ba5d600124117b484fd9]
+Signed-off-by: Fabrice Fontaine <fontaine.fabrice@gmail.com>
+---
+ m4/ax_check_openssl.m4 | 117 ++++++++++++++++++++++-------------------
+ 1 file changed, 63 insertions(+), 54 deletions(-)
+
+diff --git a/m4/ax_check_openssl.m4 b/m4/ax_check_openssl.m4
+index a87c5a6..489fd88 100644
+--- a/m4/ax_check_openssl.m4
++++ b/m4/ax_check_openssl.m4
+@@ -37,18 +37,25 @@
+ AU_ALIAS([CHECK_SSL], [AX_CHECK_OPENSSL])
+ AC_DEFUN([AX_CHECK_OPENSSL], [
+ found=false
++ tryopenssl=true
++ ssldirs=""
+ AC_ARG_WITH([openssl],
+- [AS_HELP_STRING([--with-openssl=DIR],
+- [root of the OpenSSL directory])],
++ [AS_HELP_STRING([--with-openssl[[=yes|no|PATH]]],
++ [Look for OpenSSL, with optional root of the OpenSSL directory])],
+ [
+ case "$withval" in
+- "" | y | ye | yes | n | no)
+- AC_MSG_ERROR([Invalid --with-openssl value])
++ "" | y | ye | yes)
++ ;;
++ n | no)
++ tryopenssl=false
+ ;;
+ *) ssldirs="$withval"
+ ;;
+ esac
+- ], [
++ ], [])
++
++ if $tryopenssl; then
++ if test x"$ssldirs" == x""; then
+ # if pkg-config is installed and openssl has installed a .pc file,
+ # then use that information and don't search ssldirs
+ AC_PATH_PROG([PKG_CONFIG], [pkg-config])
+@@ -65,60 +72,62 @@ AC_DEFUN([AX_CHECK_OPENSSL], [
+ if ! $found; then
+ ssldirs="/usr/local/ssl /usr/lib/ssl /usr/ssl /usr/pkg /usr/local /usr"
+ fi
+- ]
+- )
++ fi
+
++ # note that we #include <openssl/foo.h>, so the OpenSSL headers have to be in
++ # an 'openssl' subdirectory
+
+- # note that we #include <openssl/foo.h>, so the OpenSSL headers have to be in
+- # an 'openssl' subdirectory
+-
+- if ! $found; then
+- OPENSSL_INCLUDES=
+- for ssldir in $ssldirs; do
+- AC_MSG_CHECKING([for openssl/ssl.h in $ssldir])
+- if test -f "$ssldir/include/openssl/ssl.h"; then
+- OPENSSL_INCLUDES="-I$ssldir/include"
+- OPENSSL_LDFLAGS="-L$ssldir/lib"
+- OPENSSL_LIBS="-lssl -lcrypto"
+- found=true
+- AC_MSG_RESULT([yes])
+- break
+- else
+- AC_MSG_RESULT([no])
+- fi
+- done
++ if ! $found; then
++ OPENSSL_INCLUDES=
++ for ssldir in $ssldirs; do
++ AC_MSG_CHECKING([for openssl/ssl.h in $ssldir])
++ if test -f "$ssldir/include/openssl/ssl.h"; then
++ OPENSSL_INCLUDES="-I$ssldir/include"
++ OPENSSL_LDFLAGS="-L$ssldir/lib"
++ OPENSSL_LIBS="-lssl -lcrypto"
++ found=true
++ AC_MSG_RESULT([yes])
++ break
++ else
++ AC_MSG_RESULT([no])
++ fi
++ done
+
+- # if the file wasn't found, well, go ahead and try the link anyway -- maybe
+- # it will just work!
+- fi
++ # if the file wasn't found, well, go ahead and try the link anyway -- maybe
++ # it will just work!
++ fi
+
+- # try the preprocessor and linker with our new flags,
+- # being careful not to pollute the global LIBS, LDFLAGS, and CPPFLAGS
++ # try the preprocessor and linker with our new flags,
++ # being careful not to pollute the global LIBS, LDFLAGS, and CPPFLAGS
+
+- AC_MSG_CHECKING([whether compiling and linking against OpenSSL works])
+- echo "Trying link with OPENSSL_LDFLAGS=$OPENSSL_LDFLAGS;" \
+- "OPENSSL_LIBS=$OPENSSL_LIBS; OPENSSL_INCLUDES=$OPENSSL_INCLUDES" >&AS_MESSAGE_LOG_FD
++ AC_MSG_CHECKING([whether compiling and linking against OpenSSL works])
++ echo "Trying link with OPENSSL_LDFLAGS=$OPENSSL_LDFLAGS;" \
++ "OPENSSL_LIBS=$OPENSSL_LIBS; OPENSSL_INCLUDES=$OPENSSL_INCLUDES" >&AS_MESSAGE_LOG_FD
+
+- save_LIBS="$LIBS"
+- save_LDFLAGS="$LDFLAGS"
+- save_CPPFLAGS="$CPPFLAGS"
+- LDFLAGS="$LDFLAGS $OPENSSL_LDFLAGS"
+- LIBS="$OPENSSL_LIBS $LIBS"
+- CPPFLAGS="$OPENSSL_INCLUDES $CPPFLAGS"
+- AC_LINK_IFELSE(
+- [AC_LANG_PROGRAM([#include <openssl/ssl.h>], [SSL_new(NULL)])],
+- [
+- AC_MSG_RESULT([yes])
+- $1
+- ], [
+- AC_MSG_RESULT([no])
+- $2
+- ])
+- CPPFLAGS="$save_CPPFLAGS"
+- LDFLAGS="$save_LDFLAGS"
+- LIBS="$save_LIBS"
++ save_LIBS="$LIBS"
++ save_LDFLAGS="$LDFLAGS"
++ save_CPPFLAGS="$CPPFLAGS"
++ LDFLAGS="$LDFLAGS $OPENSSL_LDFLAGS"
++ LIBS="$OPENSSL_LIBS $LIBS"
++ CPPFLAGS="$OPENSSL_INCLUDES $CPPFLAGS"
++ AC_LINK_IFELSE(
++ [AC_LANG_PROGRAM([#include <openssl/ssl.h>], [SSL_new(NULL)])],
++ [
++ AC_MSG_RESULT([yes])
++ $1
++ ], [
++ AC_MSG_RESULT([no])
++ $2
++ ])
++ CPPFLAGS="$save_CPPFLAGS"
++ LDFLAGS="$save_LDFLAGS"
++ LIBS="$save_LIBS"
+
+- AC_SUBST([OPENSSL_INCLUDES])
+- AC_SUBST([OPENSSL_LIBS])
+- AC_SUBST([OPENSSL_LDFLAGS])
++ AC_SUBST([OPENSSL_INCLUDES])
++ AC_SUBST([OPENSSL_LIBS])
++ AC_SUBST([OPENSSL_LDFLAGS])
++ else
++ AC_MSG_NOTICE([Skipping openssl check, openssl disabled])
++ $2
++ fi
+ ])
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