https://gcc.gnu.org/bugzilla/show_bug.cgi?id=84773
Bug ID: 84773
Summary: [7/8 Regression] Cross-compilers do not use
aligned_alloc or _aligned_malloc for aligned-new
Product: gcc
Version: 8.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: libstdc++
Assignee: unassigned at gcc dot gnu.org
Reporter: redi at gcc dot gnu.org
Target Milestone: ---
Native compilers check for:
AC_CHECK_FUNCS(aligned_alloc posix_memalign memalign _aligned_malloc)
but cross-compilers don't. This means that a cross-compiler for mingw32 will
use the internal definition of aligned_alloc added for PR libstdc++/79190 but a
native ming32 compiler will use _aligned_malloc instead. That means objects
compiled with the cross-compiler are not compatible with objects compiled with
the native one.
On FreeBSD the same problem prevents bootstrapping a cross-compiler:
https://gcc.gnu.org/ml/gcc-help/2017-11/msg00038.html
Which can be solved by making the cross-compiler check for the same functions
as the native one checks for:
https://gcc.gnu.org/ml/gcc-help/2018-02/msg00095.html
