same qt configuration as in libpcscxx; refs #40
Marc Wäckerlin
10 years ago
parent
26dc507d68
commit
55972403fa
4 changed files with 168 additions and 84 deletions
@ -0,0 +1,133 @@ |
||||
# ============================================================================ |
||||
# http://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 CXXFLAGS to enable support. |
||||
# |
||||
# The first argument, if specified, indicates whether you insist on an |
||||
# extended mode (e.g. -std=gnu++11) or a strict conformance mode (e.g. |
||||
# -std=c++11). If neither is specified, you get whatever works, with |
||||
# preference for an extended mode. |
||||
# |
||||
# The second argument, if specified 'mandatory' or if left unspecified, |
||||
# indicates that baseline C++11 support is required and that the macro |
||||
# should error out if no mode with that support is found. If specified |
||||
# 'optional', then configuration proceeds regardless, after defining |
||||
# HAVE_CXX11 if and only if a supporting mode is found. |
||||
# |
||||
# 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> |
||||
# |
||||
# 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 3 |
||||
|
||||
m4_define([_AX_CXX_COMPILE_STDCXX_11_testbody], [ |
||||
template <typename T> |
||||
struct check |
||||
{ |
||||
static_assert(sizeof(int) <= sizeof(T), "not big enough"); |
||||
}; |
||||
|
||||
typedef check<check<bool>> right_angle_brackets; |
||||
|
||||
int a; |
||||
decltype(a) b; |
||||
|
||||
typedef check<int> check_type; |
||||
check_type c; |
||||
check_type&& cr = static_cast<check_type&&>(c); |
||||
|
||||
auto d = a; |
||||
]) |
||||
|
||||
AC_DEFUN([AX_CXX_COMPILE_STDCXX_11], [dnl |
||||
m4_if([$1], [], [], |
||||
[$1], [ext], [], |
||||
[$1], [noext], [], |
||||
[m4_fatal([invalid argument `$1' to AX_CXX_COMPILE_STDCXX_11])])dnl |
||||
m4_if([$2], [], [ax_cxx_compile_cxx11_required=true], |
||||
[$2], [mandatory], [ax_cxx_compile_cxx11_required=true], |
||||
[$2], [optional], [ax_cxx_compile_cxx11_required=false], |
||||
[m4_fatal([invalid second argument `$2' to AX_CXX_COMPILE_STDCXX_11])])dnl |
||||
AC_LANG_PUSH([C++])dnl |
||||
ac_success=no |
||||
AC_CACHE_CHECK(whether $CXX supports C++11 features by default, |
||||
ax_cv_cxx_compile_cxx11, |
||||
[AC_COMPILE_IFELSE([AC_LANG_SOURCE([_AX_CXX_COMPILE_STDCXX_11_testbody])], |
||||
[ax_cv_cxx_compile_cxx11=yes], |
||||
[ax_cv_cxx_compile_cxx11=no])]) |
||||
if test x$ax_cv_cxx_compile_cxx11 = xyes; then |
||||
ac_success=yes |
||||
fi |
||||
|
||||
m4_if([$1], [noext], [], [dnl |
||||
if test x$ac_success = xno; then |
||||
for switch in -std=gnu++11 -std=gnu++0x; do |
||||
cachevar=AS_TR_SH([ax_cv_cxx_compile_cxx11_$switch]) |
||||
AC_CACHE_CHECK(whether $CXX supports C++11 features with $switch, |
||||
$cachevar, |
||||
[ac_save_CXXFLAGS="$CXXFLAGS" |
||||
CXXFLAGS="$CXXFLAGS $switch" |
||||
AC_COMPILE_IFELSE([AC_LANG_SOURCE([_AX_CXX_COMPILE_STDCXX_11_testbody])], |
||||
[eval $cachevar=yes], |
||||
[eval $cachevar=no]) |
||||
CXXFLAGS="$ac_save_CXXFLAGS"]) |
||||
if eval test x\$$cachevar = xyes; then |
||||
CXXFLAGS="$CXXFLAGS $switch" |
||||
ac_success=yes |
||||
break |
||||
fi |
||||
done |
||||
fi]) |
||||
|
||||
m4_if([$1], [ext], [], [dnl |
||||
if test x$ac_success = xno; then |
||||
for switch in -std=c++11 -std=c++0x; do |
||||
cachevar=AS_TR_SH([ax_cv_cxx_compile_cxx11_$switch]) |
||||
AC_CACHE_CHECK(whether $CXX supports C++11 features with $switch, |
||||
$cachevar, |
||||
[ac_save_CXXFLAGS="$CXXFLAGS" |
||||
CXXFLAGS="$CXXFLAGS $switch" |
||||
AC_COMPILE_IFELSE([AC_LANG_SOURCE([_AX_CXX_COMPILE_STDCXX_11_testbody])], |
||||
[eval $cachevar=yes], |
||||
[eval $cachevar=no]) |
||||
CXXFLAGS="$ac_save_CXXFLAGS"]) |
||||
if eval test x\$$cachevar = xyes; then |
||||
CXXFLAGS="$CXXFLAGS $switch" |
||||
ac_success=yes |
||||
break |
||||
fi |
||||
done |
||||
fi]) |
||||
AC_LANG_POP([C++]) |
||||
if test x$ax_cxx_compile_cxx11_required = xtrue; then |
||||
if test x$ac_success = xno; then |
||||
AC_MSG_ERROR([*** A compiler with support for C++11 language features is required.]) |
||||
fi |
||||
else |
||||
if test x$ac_success = xno; then |
||||
HAVE_CXX11=0 |
||||
AC_MSG_NOTICE([No compiler with C++11 support was found]) |
||||
else |
||||
HAVE_CXX11=1 |
||||
AC_DEFINE(HAVE_CXX11,1, |
||||
[define if the compiler supports basic C++11 syntax]) |
||||
fi |
||||
|
||||
AC_SUBST(HAVE_CXX11) |
||||
fi |
||||
]) |
||||
Loading…
Reference in new issue