https://gcc.gnu.org/bugzilla/show_bug.cgi?id=117220
Bug ID: 117220
Summary: [15 regression] compiler-rt-18.1.8 fails to build
(stl_iterator.h:1080:42: error: an attribute list
cannot appear here)
Product: gcc
Version: 15.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: libstdc++
Assignee: unassigned at gcc dot gnu.org
Reporter: sjames at gcc dot gnu.org
Target Milestone: ---
When building compiler-rt-18.1.8, I hit this:
```
[31mFAILED: [0mlib/xray/CMakeFiles/RTXray.x86_64.dir/xray_buffer_queue.cpp.o
/usr/lib/llvm/18/bin/x86_64-pc-linux-gnu-clang++
-DSANITIZER_COMMON_NO_REDEFINE_BUILTINS -DXRAY_HAS_EXCEPTIONS=1
-I/var/tmp/portage/sys-libs/compiler-rt-sanitizers-18.1.8-r1/work/compiler-rt/lib/xray/..
-I/var/tmp/portage/sys-libs/compiler-rt-sanitizers-18.1.8-r1/work/compiler-rt/lib/xray/../../include
-DNDEBUG -march=native -O3 -pipe -fno-omit-frame-pointer -Wall
-Wno-unused-parameter -std=c++17 -m64 -fPIC -fno-builtin -fno-exceptions
-fomit-frame-pointer -funwind-tables -fno-stack-protector
-fno-sanitize=safe-stack -fvisibility=hidden -fno-lto -Wthread-safety
-Wthread-safety-reference -Wthread-safety-beta -O3 -gline-tables-only -Wno-gnu
-Wno-variadic-macros -Wno-c99-extensions -Wno-format -fno-rtti -MD -MT
lib/xray/CMakeFiles/RTXray.x86_64.dir/xray_buffer_queue.cpp.o -MF
lib/xray/CMakeFiles/RTXray.x86_64.dir/xray_buffer_queue.cpp.o.d -o
lib/xray/CMakeFiles/RTXray.x86_64.dir/xray_buffer_queue.cpp.o -c
/var/tmp/portage/sys-libs/compiler-rt-sanitizers-18.1.8-r1/work/compiler-rt/lib/xray/xray_buffer_queue.cpp
In file included from
/var/tmp/portage/sys-libs/compiler-rt-sanitizers-18.1.8-r1/work/compiler-rt/lib/xray/xray_buffer_queue.cpp:23:
In file included from
/usr/lib/gcc/x86_64-pc-linux-gnu/15/include/g++-v15/memory:71:
In file included from
/usr/lib/gcc/x86_64-pc-linux-gnu/15/include/g++-v15/bits/stl_uninitialized.h:63:
In file included from
/usr/lib/gcc/x86_64-pc-linux-gnu/15/include/g++-v15/bits/stl_algobase.h:67:
/usr/lib/gcc/x86_64-pc-linux-gnu/15/include/g++-v15/bits/stl_iterator.h:1080:42:
error: an attribute list cannot appear here
1080 | __attribute__((__always_inline__)) _GLIBCXX_NODISCARD
| ^~~~~~~~~~~~~~~~~~
/usr/lib/gcc/x86_64-pc-linux-gnu/15/include/g++-v15/x86_64-pc-linux-gnu/bits/c++config.h:173:29:
note: expanded from macro '_GLIBCXX_NODISCARD'
173 | # define _GLIBCXX_NODISCARD [[__nodiscard__]]
| ^~~~~~~~~~~~~~~~~
``
I assume this slipped in w/ the recent uninitialized refactoring.
--
````
Using built-in specs.
COLLECT_GCC=gcc
COLLECT_LTO_WRAPPER=/usr/libexec/gcc/x86_64-pc-linux-gnu/15/lto-wrapper
Target: x86_64-pc-linux-gnu
Configured with:
/var/tmp/portage/sys-devel/gcc-15.0.9999/work/gcc-15.0.9999/configure
--host=x86_64-pc-linux-gnu --build=x86_64-pc-linux-gnu --prefix=/usr
--bindir=/usr/x86_64-pc-linux-gnu/gcc-bin/15
--includedir=/usr/lib/gcc/x86_64-pc-linux-gnu/15/include
--datadir=/usr/share/gcc-data/x86_64-pc-linux-gnu/15
--mandir=/usr/share/gcc-data/x86_64-pc-linux-gnu/15/man
--infodir=/usr/share/gcc-data/x86_64-pc-linux-gnu/15/info
--with-gxx-include-dir=/usr/lib/gcc/x86_64-pc-linux-gnu/15/include/g++-v15
--disable-silent-rules --disable-dependency-tracking
--with-python-dir=/share/gcc-data/x86_64-pc-linux-gnu/15/python
--enable-objc-gc --enable-languages=c,c++,d,go,objc,obj-c++,fortran,ada,m2,rust
--enable-obsolete --enable-secureplt --disable-werror --with-system-zlib
--enable-nls --without-included-gettext --disable-libunwind-exceptions
--enable-checking=yes,extra,rtl --with-bugurl=https://bugs.gentoo.org/
--with-pkgversion='Gentoo 15.0.9999 p, commit
a36914b3932f5ae93d9f18d445be959cd61f1dff' --with-gcc-major-version-only
--enable-libstdcxx-time --enable-lto --disable-libstdcxx-pch --enable-shared
--enable-threads=posix --enable-__cxa_atexit --enable-clocale=gnu
--enable-multilib --with-multilib-list=m32,m64 --disable-fixed-point
--enable-targets=all --enable-libgomp --disable-libssp --enable-libada
--enable-cet --disable-systemtap --disable-valgrind-annotations
--disable-vtable-verify --disable-libvtv --with-zstd --without-isl
--enable-default-pie --enable-host-pie --enable-host-bind-now
--enable-default-ssp --disable-fixincludes --with-build-config='bootstrap-O3
bootstrap-lto bootstrap-cet'
Thread model: posix
Supported LTO compression algorithms: zlib zstd
gcc version 15.0.0 20241016 (experimental)
aaa855fac0c7003d823b48fe4cc4b9ded9331a2b (Gentoo 15.0.9999 p, commit
a36914b3932f5ae93d9f18d445be959cd61f1dff)
```
