nx{comp{,shad},proxy}: add configure flag --enable-cxx11 to enable and setup…

m4/ax_cxx_compile_stdcxx_11.m4

+# =============================================================================
+#  https://www.gnu.org/software/autoconf-archive/ax_cxx_compile_stdcxx_11.html
+# =============================================================================
+#
+# SYNOPSIS
+#
+#   AX_CXX_COMPILE_STDCXX_11([ext|noext], [mandatory|optional])
+#
+# DESCRIPTION
+#
+#   Check for baseline language coverage in the compiler for the C++11
+#   standard; if necessary, add switches to CXX and CXXCPP to enable
+#   support.
+#
+#   This macro is a convenience alias for calling the AX_CXX_COMPILE_STDCXX
+#   macro with the version set to C++11.  The two optional arguments are
+#   forwarded literally as the second and third argument respectively.
+#   Please see the documentation for the AX_CXX_COMPILE_STDCXX macro for
+#   more information.  If you want to use this macro, you also need to
+#   download the ax_cxx_compile_stdcxx.m4 file.
+#
+# LICENSE
+#
+#   Copyright (c) 2008 Benjamin Kosnik <bkoz@redhat.com>
+#   Copyright (c) 2012 Zack Weinberg <zackw@panix.com>
+#   Copyright (c) 2013 Roy Stogner <roystgnr@ices.utexas.edu>
+#   Copyright (c) 2014, 2015 Google Inc.; contributed by Alexey Sokolov <sokolov@google.com>
+#   Copyright (c) 2015 Paul Norman <penorman@mac.com>
+#   Copyright (c) 2015 Moritz Klammler <moritz@klammler.eu>
+#
+#   Copying and distribution of this file, with or without modification, are
+#   permitted in any medium without royalty provided the copyright notice
+#   and this notice are preserved. This file is offered as-is, without any
+#   warranty.
+
+#serial 18
+
+AX_REQUIRE_DEFINED([AX_CXX_COMPILE_STDCXX])
+AC_DEFUN([AX_CXX_COMPILE_STDCXX_11], [AX_CXX_COMPILE_STDCXX([11], [$1], [$2])])

nxcomp/configure.ac

@@ -66,6 +66,12 @@ fi
 # If in_addr_t is not defined use unsigned int.
 AC_CHECK_TYPES([in_addr_t], [], [], [[#include <netinet/in.h>]])
 
+AC_ARG_ENABLE([cxx11],
+              [AS_HELP_STRING([--enable-cxx11],
+                              [enable optional features requiring C++11 support (disabled by default)])],
+              [AS_IF([test x$enableval = xyes],
+                    [AX_CXX_COMPILE_STDCXX_11([], [mandatory])])])
+
 AC_ARG_ENABLE([debug],
               [AS_HELP_STRING([--enable-debug],
                               [enable to get info session log output (disabled by default)])],

nxcomp/m4/ax_cxx_compile_stdcxx.m4

+../../m4/ax_cxx_compile_stdcxx.m4
\ No newline at end of file

nxcomp/m4/ax_cxx_compile_stdcxx_11.m4

+../../m4/ax_cxx_compile_stdcxx_11.m4
\ No newline at end of file

nxcompshad/configure.ac

@@ -44,6 +44,12 @@ AC_LANG([C++])
 NX_COMPILER_BRAND
 NX_DEFAULT_OPTIONS
 
+AC_ARG_ENABLE([cxx11],
+              [AS_HELP_STRING([--enable-cxx11],
+                              [enable optional features requiring C++11 support (disabled by default)])],
+              [AS_IF([test x$enableval = xyes],
+                     [AX_CXX_COMPILE_STDCXX_11([], [mandatory])])])
+
 AC_CONFIG_FILES([
 Makefile
 src/Makefile

nxcompshad/m4/ax_cxx_compile_stdcxx.m4

+../../m4/ax_cxx_compile_stdcxx.m4
\ No newline at end of file

nxcompshad/m4/ax_cxx_compile_stdcxx_11.m4

+../../m4/ax_cxx_compile_stdcxx_11.m4
\ No newline at end of file

nxproxy/configure.ac

@@ -23,6 +23,12 @@ AC_LANG([C])
 NX_COMPILER_BRAND
 NX_DEFAULT_OPTIONS
 
+AC_ARG_ENABLE([cxx11],
+              [AS_HELP_STRING([--enable-cxx11],
+                              [enable optional features requiring C++11 support (disabled by default)])],
+              [AS_IF([test x$enableval = xyes],
+                     [AX_CXX_COMPILE_STDCXX_11([], [mandatory])])])
+
 AC_CONFIG_FILES([
 Makefile
 man/Makefile

nxproxy/m4/ax_cxx_compile_stdcxx.m4

+../../m4/ax_cxx_compile_stdcxx.m4
\ No newline at end of file

nxproxy/m4/ax_cxx_compile_stdcxx_11.m4

+../../m4/ax_cxx_compile_stdcxx_11.m4
\ No newline at end of file