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Explicitly use C++11 for compilation

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Otherwise compilation fails on GCC 5.4 in Steam Runtime environment.

As of 2019, all up-to-date compilers support C++11, most of them
use C++14 as default standard, but C++14 is not fully supported by
autoconf in Ubuntu 16.04 LTS.

Full C++11 support was introduced in GCC 4.8.1 and Clang 3.3.
This commit is contained in:
Patryk Obara 2019-11-08 11:28:05 +01:00 • committed by Patryk Obara
parent 576a104dc8
commit a22acca119
1 changed files with 2 additions and 14 deletions
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16
configure.ac
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@ -63,20 +63,8 @@ AC_CHECK_SIZEOF(unsigned long)
AC_CHECK_SIZEOF(unsigned long long)
AC_CHECK_SIZEOF(int *)
dnl check and use C++ circa-2003 language constructs.
AX_CXX_COMPILE_STDCXX_0X(noext, mandatory)
if test "$ax_cv_cxx_compile_cxx0x_native" = no; then
if test "$ax_cv_cxx_compile_cxx0x_cxx" = yes; then
CXXFLAGS="$CXXFLAGS -std=c++0x"
else
AC_MSG_ERROR([A C++ compiler that supports the C++03 standard is required])
fi
fi
# Note that the above macro is deprecated in favor of AX_CXX_COMPILE_STDCXX_11:
# https://www.gnu.org/software/autoconf-archive/ax_cxx_compile_stdcxx_0x.html
# However we use it anyway because it is suggested that C++03 should
# be the limit for now: https://sourceforge.net/p/dosbox/patches/283/#cb9a
dnl Require compiler with C++11 support, do not use GNU extensions.
AX_CXX_COMPILE_STDCXX_11(noext, mandatory)
dnl some semi complex check for sys/socket so it works on darwin as well
AC_CHECK_HEADERS([stdlib.h sys/types.h])