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* [Bug libstdc++/95592] New: Collision with struct _Cosh when Cross compiling libstdc++
@ 2020-06-08 22:58 kevin at arilabs dot net
2020-06-08 23:01 ` [Bug libstdc++/95592] " kevin at arilabs dot net
` (5 more replies)
0 siblings, 6 replies; 7+ messages in thread
From: kevin at arilabs dot net @ 2020-06-08 22:58 UTC (permalink / raw)
To: gcc-bugs
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=95592
Bug ID: 95592
Summary: Collision with struct _Cosh when Cross compiling
libstdc++
Product: gcc
Version: 8.3.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: libstdc++
Assignee: unassigned at gcc dot gnu.org
Reporter: kevin at arilabs dot net
Target Milestone: ---
I am cross compiling gcc 8.3.0 for QNX 6.6. While doing so,
libstdc++-v3/include/bits/valarray_after.h was having trouble with "struct
_Cosh" defined in valarray_before.h because it was colliding with the function
_Cosh() is defined in one of the target OS's headers.
Specifically it was having trouble with (around line 445 of valarray_after.h):
_DEFINE_EXPR_UNARY_FUNCTION(cosh, _Cosh)
The compiler was using the function declaration of _Cosh instead of struct
_Cosh.
There were other _DEFINE_EXPR_UNARY_FUNCTION that had the same issue (I don't
remember which ones as I focused on _Cosh).
Below is a patch to valarray_after.h that fixes the issue. I'm pretty sure QNX
may be the only target OS with this problem, so I am content if this doesn't
make it in gcc, but thought that perhaps removing ambiguity from the preceding
template definitions wouldn't be bad.
I took a look at gcc 9 and 10 code base and the issue appears to exist there as
well.
Thanks
Kevin
Index: libstdc++-v3/include/bits/valarray_after.h
===================================================================
--- libstdc++-v3/include/bits/valarray_after.h (revision 1469)
+++ libstdc++-v3/include/bits/valarray_after.h (working copy)
@@ -422,20 +422,20 @@
#define _DEFINE_EXPR_UNARY_FUNCTION(_Name, _UName) \
template<class _Dom> \
- inline _Expr<_UnClos<_UName, _Expr, _Dom>, \
+ inline _Expr<_UnClos<struct _UName, _Expr, _Dom>,
\
typename _Dom::value_type> \
_Name(const _Expr<_Dom, typename _Dom::value_type>& __e) \
{ \
typedef typename _Dom::value_type _Tp; \
- typedef _UnClos<_UName, _Expr, _Dom> _Closure; \
+ typedef _UnClos<struct _UName, _Expr, _Dom> _Closure;
\
return _Expr<_Closure, _Tp>(_Closure(__e())); \
} \
\
template<typename _Tp> \
- inline _Expr<_UnClos<_UName, _ValArray, _Tp>, _Tp> \
+ inline _Expr<_UnClos<struct _UName, _ValArray, _Tp>, _Tp>
\
_Name(const valarray<_Tp>& __v) \
{ \
- typedef _UnClos<_UName, _ValArray, _Tp> _Closure; \
+ typedef _UnClos<struct _UName, _ValArray, _Tp> _Closure;
\
return _Expr<_Closure, _Tp>(_Closure(__v)); \
}
^ permalink raw reply [flat|nested] 7+ messages in thread
* [Bug libstdc++/95592] Collision with struct _Cosh when Cross compiling libstdc++
2020-06-08 22:58 [Bug libstdc++/95592] New: Collision with struct _Cosh when Cross compiling libstdc++ kevin at arilabs dot net
@ 2020-06-08 23:01 ` kevin at arilabs dot net
2020-06-08 23:02 ` kevin at arilabs dot net
` (4 subsequent siblings)
5 siblings, 0 replies; 7+ messages in thread
From: kevin at arilabs dot net @ 2020-06-08 23:01 UTC (permalink / raw)
To: gcc-bugs
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=95592
Kevin Stallard <kevin at arilabs dot net> changed:
What |Removed |Added
----------------------------------------------------------------------------
Host|Ubuntu 20.04 |Ubuntu 18.04.4
--- Comment #1 from Kevin Stallard <kevin at arilabs dot net> ---
I should also add that this was build with gcc 7.5.0 on Ubuntu
^ permalink raw reply [flat|nested] 7+ messages in thread
* [Bug libstdc++/95592] Collision with struct _Cosh when Cross compiling libstdc++
2020-06-08 22:58 [Bug libstdc++/95592] New: Collision with struct _Cosh when Cross compiling libstdc++ kevin at arilabs dot net
2020-06-08 23:01 ` [Bug libstdc++/95592] " kevin at arilabs dot net
@ 2020-06-08 23:02 ` kevin at arilabs dot net
2020-10-28 12:50 ` cvs-commit at gcc dot gnu.org
` (3 subsequent siblings)
5 siblings, 0 replies; 7+ messages in thread
From: kevin at arilabs dot net @ 2020-06-08 23:02 UTC (permalink / raw)
To: gcc-bugs
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=95592
--- Comment #2 from Kevin Stallard <kevin at arilabs dot net> ---
Please forgive the fat fingers.
gcc 7.5.0 on Ubuntu 18.04.4 is the host used to build the cross compiler.
(In reply to Kevin Stallard from comment #1)
> I should also add that this was build with gcc 7.5.0 on Ubuntu
^ permalink raw reply [flat|nested] 7+ messages in thread
* [Bug libstdc++/95592] Collision with struct _Cosh when Cross compiling libstdc++
2020-06-08 22:58 [Bug libstdc++/95592] New: Collision with struct _Cosh when Cross compiling libstdc++ kevin at arilabs dot net
2020-06-08 23:01 ` [Bug libstdc++/95592] " kevin at arilabs dot net
2020-06-08 23:02 ` kevin at arilabs dot net
@ 2020-10-28 12:50 ` cvs-commit at gcc dot gnu.org
2020-10-28 12:51 ` redi at gcc dot gnu.org
` (2 subsequent siblings)
5 siblings, 0 replies; 7+ messages in thread
From: cvs-commit at gcc dot gnu.org @ 2020-10-28 12:50 UTC (permalink / raw)
To: gcc-bugs
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=95592
--- Comment #3 from CVS Commits <cvs-commit at gcc dot gnu.org> ---
The master branch has been updated by Jonathan Wakely <redi@gcc.gnu.org>:
https://gcc.gnu.org/g:72a87d82e0d0741d75c72c8f3d2fc070e3a02b5f
commit r11-4476-g72a87d82e0d0741d75c72c8f3d2fc070e3a02b5f
Author: Jonathan Wakely <jwakely@redhat.com>
Date: Wed Oct 28 12:35:44 2020 +0000
libstdc++: Fix name clash with _Cosh in QNX headers [PR 95592]
This replaces unqualified names like _Cosh with struct std::_Cosh to
ensure there is no ambiguity with other entities with the same name.
libstdc++-v3/ChangeLog:
PR libstdc++/95592
* include/bits/valarray_after.h (_DEFINE_EXPR_UNARY_OPERATOR)
(_DEFINE_EXPR_BINARY_OPERATOR, _DEFINE_EXPR_BINARY_FUNCTION):
Use elaborated-type-specifier and qualified-id to avoid
ambiguities with QNX system headers.
* testsuite/26_numerics/valarray/95592.cc: New test.
^ permalink raw reply [flat|nested] 7+ messages in thread
* [Bug libstdc++/95592] Collision with struct _Cosh when Cross compiling libstdc++
2020-06-08 22:58 [Bug libstdc++/95592] New: Collision with struct _Cosh when Cross compiling libstdc++ kevin at arilabs dot net
` (2 preceding siblings ...)
2020-10-28 12:50 ` cvs-commit at gcc dot gnu.org
@ 2020-10-28 12:51 ` redi at gcc dot gnu.org
2021-03-29 20:01 ` cvs-commit at gcc dot gnu.org
2021-03-29 20:03 ` redi at gcc dot gnu.org
5 siblings, 0 replies; 7+ messages in thread
From: redi at gcc dot gnu.org @ 2020-10-28 12:51 UTC (permalink / raw)
To: gcc-bugs
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=95592
Jonathan Wakely <redi at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Keywords| |build
Target Milestone|--- |11.0
Status|UNCONFIRMED |RESOLVED
Resolution|--- |FIXED
--- Comment #4 from Jonathan Wakely <redi at gcc dot gnu.org> ---
Fixed in GCC 11. Probably OK to backport, but I'll wait a bit.
^ permalink raw reply [flat|nested] 7+ messages in thread
* [Bug libstdc++/95592] Collision with struct _Cosh when Cross compiling libstdc++
2020-06-08 22:58 [Bug libstdc++/95592] New: Collision with struct _Cosh when Cross compiling libstdc++ kevin at arilabs dot net
` (3 preceding siblings ...)
2020-10-28 12:51 ` redi at gcc dot gnu.org
@ 2021-03-29 20:01 ` cvs-commit at gcc dot gnu.org
2021-03-29 20:03 ` redi at gcc dot gnu.org
5 siblings, 0 replies; 7+ messages in thread
From: cvs-commit at gcc dot gnu.org @ 2021-03-29 20:01 UTC (permalink / raw)
To: gcc-bugs
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=95592
--- Comment #5 from CVS Commits <cvs-commit at gcc dot gnu.org> ---
The releases/gcc-10 branch has been updated by Jonathan Wakely
<redi@gcc.gnu.org>:
https://gcc.gnu.org/g:fa9c46939f9a5c5eb90338b80b213ec1e3579df7
commit r10-9567-gfa9c46939f9a5c5eb90338b80b213ec1e3579df7
Author: Jonathan Wakely <jwakely@redhat.com>
Date: Wed Oct 28 12:35:44 2020 +0000
libstdc++: Fix name clash with _Cosh in QNX headers [PR 95592]
This replaces unqualified names like _Cosh with struct std::_Cosh to
ensure there is no ambiguity with other entities with the same name.
libstdc++-v3/ChangeLog:
PR libstdc++/95592
* include/bits/valarray_after.h (_DEFINE_EXPR_UNARY_OPERATOR)
(_DEFINE_EXPR_BINARY_OPERATOR, _DEFINE_EXPR_BINARY_FUNCTION):
Use elaborated-type-specifier and qualified-id to avoid
ambiguities with QNX system headers.
* testsuite/26_numerics/valarray/95592.cc: New test.
(cherry picked from commit 72a87d82e0d0741d75c72c8f3d2fc070e3a02b5f)
^ permalink raw reply [flat|nested] 7+ messages in thread
* [Bug libstdc++/95592] Collision with struct _Cosh when Cross compiling libstdc++
2020-06-08 22:58 [Bug libstdc++/95592] New: Collision with struct _Cosh when Cross compiling libstdc++ kevin at arilabs dot net
` (4 preceding siblings ...)
2021-03-29 20:01 ` cvs-commit at gcc dot gnu.org
@ 2021-03-29 20:03 ` redi at gcc dot gnu.org
5 siblings, 0 replies; 7+ messages in thread
From: redi at gcc dot gnu.org @ 2021-03-29 20:03 UTC (permalink / raw)
To: gcc-bugs
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=95592
Jonathan Wakely <redi at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Target Milestone|11.0 |10.3
^ permalink raw reply [flat|nested] 7+ messages in thread
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2020-06-08 22:58 [Bug libstdc++/95592] New: Collision with struct _Cosh when Cross compiling libstdc++ kevin at arilabs dot net
2020-06-08 23:01 ` [Bug libstdc++/95592] " kevin at arilabs dot net
2020-06-08 23:02 ` kevin at arilabs dot net
2020-10-28 12:50 ` cvs-commit at gcc dot gnu.org
2020-10-28 12:51 ` redi at gcc dot gnu.org
2021-03-29 20:01 ` cvs-commit at gcc dot gnu.org
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