https://gcc.gnu.org/bugzilla/show_bug.cgi?id=115796
Bug ID: 115796
Summary: build failure since double_u -> __double_u change
Product: gcc
Version: 15.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: c++
Assignee: unassigned at gcc dot gnu.org
Reporter: prlw1 at cam dot ac.uk
Target Milestone: ---
Since
commit 3a873c0a7bc8183de95a6103b507101a25eed413 (HEAD)
Author: liuhongt <[email protected]>
Date: Thu May 30 14:15:48 2024 +0800
Rename double_u with __double_u to avoid pulluting the namespace.
gcc/ChangeLog:
* config/i386/emmintrin.h (__double_u): Rename from double_u.
(_mm_load_sd): Replace double_u with __double_u.
(_mm_store_sd): Ditto.
(_mm_loadh_pd): Ditto.
(_mm_loadl_pd): Ditto.
* config/i386/xmmintrin.h (__float_u): Rename from float_u.
(_mm_load_ss): Ditto.
(_mm_store_ss): Ditto.
I have a build failure on NetBSD as the namespace pollution avoidance causes
a direct hit with the system /usr/include/math.h
Given that this causes pain, but doesn't obviously cause gain, could it be
reverted? (or is there some gain that I am missing?)
=======================================================================
In file included from /usr/src/local/gcc/obj/gcc/include/emmintrin.h:31,
from
/usr/src/local/gcc/obj/x86_64-unknown-netbsd10.99/libstdc++-v3/include/ext/random:45,
from
/usr/src/local/gcc/libstdc++-v3/include/precompiled/extc++.h:65:
/usr/src/local/gcc/obj/gcc/include/xmmintrin.h:75:15: error: conflicting
declaration 'typedef float __float_u'
75 | typedef float __float_u __attribute__ ((__may_alias__, __aligned__
(1)));
| ^~~~~~~~~
In file included from
/usr/src/local/gcc/obj/x86_64-unknown-netbsd10.99/libstdc++-v3/include/cmath:47,
from
/usr/src/local/gcc/obj/x86_64-unknown-netbsd10.99/libstdc++-v3/include/x86_64-unknown-netbsd10.99/bits/stdc++.h:114,
from
/usr/src/local/gcc/libstdc++-v3/include/precompiled/extc++.h:32:
/usr/src/local/gcc/obj/gcc/include-fixed/math.h:49:7: note: previous
declaration as 'union __float_u'
49 | union __float_u {
