https://gcc.gnu.org/bugzilla/show_bug.cgi?id=109814
Bug ID: 109814
Summary: freestanding using cmath does not compile anymore
Product: gcc
Version: 13.1.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: libstdc++
Assignee: unassigned at gcc dot gnu.org
Reporter: lestofante88 at gmail dot com
Target Milestone: ---
My code stop compiling after updating from
arm-none-eabi-gcc (Arch Repository) 12.2.0
to
arm-none-eabi-gcc (Arch Repository) 13.1.0
(cant easily test any version in-between)
My understanding is that I am incorrectly using non-freestand library in
freestand mode (cmath in this case).
The problem with this is i am quite sure in embedded a lot of project does.
This breakage, even if technically correct, may create a lot of issue in
embedded projects and may deserve a special handling, would that be good
communication of the breaking changes, or revert.
REPRODUCE:
- create a file test.cpp containing
#include <cmath>
- compile with
arm-none-eabi-g++ --freestanding -c test.cpp
RESULT
On gcc 12.2.0: compilation successful
On gcc 13.1.0:
In file included from /usr/arm-none-eabi/include/c++/13.1.0/cmath:41,
from test.cpp:1:
/usr/arm-none-eabi/include/c++/13.1.0/bits/requires_hosted.h:34:4: error:
#error "This header is not available in freestanding mode."
34 | # error "This header is not available in freestanding mode."
| ^~~~~
In file included from /usr/arm-none-eabi/include/c++/13.1.0/bits/specfun.h:47,
from /usr/arm-none-eabi/include/c++/13.1.0/cmath:3716:
/usr/arm-none-eabi/include/c++/13.1.0/tr1/gamma.tcc: In function '_Tp
std::__detail::__log_gamma(_Tp)':
/usr/arm-none-eabi/include/c++/13.1.0/tr1/gamma.tcc:236:18: error:
'__throw_domain_error' is not a member of 'std'; did you mean
'__throw_runtime_error'?
236 | std::__throw_domain_error(__N("Argument is nonpositive
integer "
| ^~~~~~~~~~~~~~~~~~~~
| __throw_runtime_error
[...] the error repeat for multiple functions.
