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Check nullptr is supported by C++ compiler

pull/454/head
Tatsuhiro Tsujikawa 2015-07-29 21:37:59 +09:00
parent 4da5af0f3b
commit 008aba66d5
1 changed files with 10 additions and 0 deletions
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10
configure.ac
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@ -125,6 +125,16 @@ PKG_PROG_PKG_CONFIG([0.20])
# Check C++ compiler supports C++0x/C++11 feature
AX_CXX_COMPILE_STDCXX_11([noext], [mandatory])
# Check C++ compiler actually supports nullptr
AC_MSG_CHECKING([whether the c++ compiler supports nullptr])
AC_COMPILE_IFELSE([AC_LANG_PROGRAM([[
]],
[[
int *a = nullptr;
]])],
[],
[AC_MSG_FAILURE([C++ compiler does not understand nullptr, perhaps C++ compiler is too old. Try again with new one (gcc >= 4.8.3 or clang >= 3.4)])])
# i686-w64-mingw32-g++ 4.6 does not support override keyword. For
# those compilers, define CXX11_OVERRIDE to empty string. Otherwise
# define it as override. Use CXX11_OVERRIDE instead of override.