+# checks for pthreads
+ACX_PTHREAD([enable_threads="pthread"],[enable_threads="no"])
+if test $enable_threads != "pthread"; then
+ AC_MSG_ERROR([unable to find pthreads, currently this is required])
+else
+ AC_DEFINE(HAVE_PTHREAD,1,[Define if you have POSIX threads libraries and header files.])
+ AM_CONDITIONAL(BUILD_PTHREAD,test "$enable_threads" = "pthread")
+ LIBS="$PTHREAD_LIBS $LIBS"
+ CFLAGS="$PTHREAD_CFLAGS $CFLAGS"
+ CXXFLAGS="$PTHREAD_CFLAGS $CXXFLAGS"
+fi
+
+# OpenSSL settings
+AC_ARG_WITH(openssl,
+ AC_HELP_STRING([--with-openssl=PATH], [where openssl is installed]),
+ [if test x_$with_openssl != x_/usr; then
+ SSLLIBS="-L${with_openssl}/lib -lcrypto -lssl"
+ SSLFLAGS="-I${with_openssl}/include"
+ fi])
+
+if test "x$SSLLIBS" = "x" ; then
+ AC_PATH_PROG(PKG_CONFIG, pkg-config)
+ if test "x$PKG_CONFIG" != x && test "x$PKG_CONFIG" != "xno" ; then
+ if pkg-config openssl ; then
+ SSLLIBS="`$PKG_CONFIG --libs openssl`"
+ SSLFLAGS="`$PKG_CONFIG --cflags openssl`"
+ else
+ AC_MSG_ERROR([OpenSSL not supported by pkg-config, try --with-openssl instead])
+ fi
+ fi
+fi
+
+if test "x$SSLLIBS" = "x" ; then
+ SSLLIBS="-lcrypto -lssl"
+fi
+
+AC_MSG_CHECKING(for OpenSSL libraries)
+AC_MSG_RESULT($SSLLIBS)
+LIBS="$LIBS $SSLLIBS"
+AC_MSG_CHECKING(for OpenSSL cflags)
+AC_MSG_RESULT($SSLFLAGS)
+CPPFLAGS="$SSLFLAGS $CPPFLAGS"
+
+AC_CHECK_HEADER([openssl/pem.h],,
+ AC_MSG_ERROR([unable to find openssl header files]))
+AC_MSG_CHECKING(for ERR_load_CRYPTO_string)
+AC_TRY_LINK_FUNC([ERR_load_CRYPTO_strings],,
+ AC_MSG_ERROR([unable to link with openssl libraries]))
+AC_MSG_RESULT(yes)
+