--- linuxsampler/trunk/configure.ac	2019/08/15 09:09:21	3556
+++ linuxsampler/trunk/configure.ac	2019/08/18 00:06:04	3557
@@ -3,7 +3,7 @@
 
 m4_define(linuxsampler_release_major, 2)
 m4_define(linuxsampler_release_minor, 1)
-m4_define(linuxsampler_release_build, 1.svn2)
+m4_define(linuxsampler_release_build, 1.svn3)
 
 
 AC_INIT([linuxsampler],[linuxsampler_release_major.linuxsampler_release_minor.linuxsampler_release_build])
@@ -64,6 +64,12 @@
 
 AM_CONDITIONAL(CROSS_COMPILING, test $cross_compiling = yes)
 
+# make sure C++11 is supported by compiler
+# (add CXXFLAGS if required [e.g. -std=c++11])
+m4_ifdef([m4_include(m4/ax_cxx_compile_stdcxx.m4)],,
+             [sinclude([m4/ax_cxx_compile_stdcxx.m4])])
+AX_CXX_COMPILE_STDCXX(11, [], mandatory)
+
 AC_MSG_CHECKING([whether x86 architecture])
 def_arch_x86=0
 case $host_cpu in