https://gcc.gnu.org/bugzilla/show_bug.cgi?id=92376
Bug ID: 92376
Summary: [9/10 Regression] bootstrap fails with
--disable-hosted-libstdcxx
Product: gcc
Version: 10.0
Status: UNCONFIRMED
Keywords: build
Severity: normal
Priority: P3
Component: libstdc++
Assignee: unassigned at gcc dot gnu.org
Reporter: redi at gcc dot gnu.org
Target Milestone: ---
I'm not sure when this regression started, I'll check later.
/home/jwakely/src/gcc/libstdc++-v3/libsupc++/new_opa.cc:48:9: error:
‘aligned_alloc’ has not been declared in ‘::’
48 | using ::aligned_alloc;
| ^~~~~~~~~~~~~
/home/jwakely/src/gcc/libstdc++-v3/libsupc++/new_opa.cc: In function ‘void*
operator new(std::size_t, std::align_val_t)’:
/home/jwakely/src/gcc/libstdc++-v3/libsupc++/new_opa.cc:124:26: error:
‘aligned_alloc’ is not a member of ‘__gnu_cxx’
124 | while ((p = __gnu_cxx::aligned_alloc (align, sz)) == nullptr)
| ^~~~~~~~~~~~~
The problem is that <cstdlib> and <stdlib.h> do not include the libc <stdlib.h>
for freestanding builds, and so there is no declaration of aligned_alloc.
Arguably, we shouldn't try to use aligned_alloc for a freestanding build
anyway, and should use the internal aligned_alloc function that is based on
manually aligning into a malloc'd buffer.
