On Fri, Aug 19, 2022 at 07:41:01PM +1000, Jonathan Gray wrote: > On Fri, Aug 19, 2022 at 04:35:20PM +1000, Jonathan Gray wrote: > > On Thu, Aug 18, 2022 at 10:38:38PM -0400, Brad Smith wrote: > > > While trying to update to the latest MariaDB release I ran into an issue > > > with the stdlib.h header where it does not expose aligned_alloc() in C++11 > > > mode breaking the build. Looking around this was fixed in FreeBSD, NetBSD > > > and DragonFly years ago. > > > > > > https://github.com/freebsd/freebsd-src/commit/79d09835dd3c33a699b00d00ec50be6a4512b57f > > > > It does not appear in the standard drafts until c++17 > > > > llvm cstdlib also has > > #if _LIBCPP_STD_VER > 14 && defined(_LIBCPP_HAS_ALIGNED_ALLOC) > > using ::aligned_alloc _LIBCPP_USING_IF_EXISTS; > > #endif > > c++14 still refers to c99, c++17 refers to c11 > > struct timespec, TIME_UTC and timespec_get are also c++17
In cdefs.h __ISO_C_VISIBLE is set to 2011 when __cplusplus >= 201703 so building with std=c++17 should just work > > > > > > > > > > > > Index: stdlib.h > > > =================================================================== > > > RCS file: /home/cvs/src/include/stdlib.h,v > > > retrieving revision 1.76 > > > diff -u -p -u -p -r1.76 stdlib.h > > > --- stdlib.h 10 May 2019 15:03:24 -0000 1.76 > > > +++ stdlib.h 16 Aug 2022 22:55:41 -0000 > > > @@ -223,7 +223,7 @@ unsigned long long > > > strtoull(const char *__restrict, char **__restrict, int); > > > #endif > > > > > > -#if __ISO_C_VISIBLE >= 2011 > > > +#if __ISO_C_VISIBLE >= 2011 || __cplusplus >= 201103 > > > void * > > > aligned_alloc(size_t, size_t); > > > #endif > > > > > > > > > > > >
