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Remove configure test for std::call_once

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It was not needed anymore since 193cda6e.
This commit is contained in:
Jean-Marc Lasgouttes 2024-10-05 15:17:37 +02:00
parent 09684899d6
commit 02beaa0a7b
1 changed files with 0 additions and 27 deletions
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27
config/lyxinclude.m4
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@ -210,32 +210,6 @@ AC_DEFUN([LYX_CXX_CXX11_FLAGS],
])
dnl Usage: LYX_CXX_USE_CALL_ONCE
dnl check whether we can use std::call_once and set the
dnl LYX_USE_STD_CALL_ONCE macro and conditional accordingly.
AC_DEFUN([LYX_CXX_USE_CALL_ONCE],
[AC_MSG_CHECKING([for std::call_once availability])
save_CPPFLAGS=$CPPFLAGS
CPPFLAGS="$AM_CPPFLAGS $CPPFLAGS"
save_CXXFLAGS=$CXXFLAGS
CXXFLAGS="$AM_CXXFLAGS $CXXFLAGS"
AC_LINK_IFELSE([AC_LANG_PROGRAM([[
#include <mutex>
static std::once_flag flag;
]], [[
std::call_once(flag, [](){ return; });
]])],[lyx_std_call_once=yes],[lyx_std_call_once=no])
CXXFLAGS=$save_CXXFLAGS
CPPFLAGS=$save_CPPFLAGS
AC_MSG_RESULT([$lyx_std_call_once])
if test $lyx_std_call_once = yes ; then
AC_DEFINE([LYX_USE_STD_CALL_ONCE], 1, [define to 1 if std::call_once is supported by the compiler])
fi
AM_CONDITIONAL([LYX_USE_STD_CALL_ONCE], test $lyx_std_call_once = yes)
])
dnl Usage: LYX_LIB_STDCXX: set lyx_cv_lib_stdcxx to yes if the STL library is libstdc++.
AC_DEFUN([LYX_LIB_STDCXX],
[AC_CACHE_CHECK([whether STL is libstdc++],
@ -262,7 +236,6 @@ AC_LANG_PUSH(C++)
LYX_PROG_CLANG
LYX_CXX_CXX11_FLAGS($enable_cxx_mode)
LYX_LIB_STDCXX
LYX_CXX_USE_CALL_ONCE
AC_LANG_POP(C++)
### We might want to get or shut warnings.