https://gcc.gnu.org/bugzilla/show_bug.cgi?id=127476
Bug ID: 127476
Summary: <memory> unconditionally includes <bits/indirect.h> in
freestanding mode
Product: gcc
Version: 16.2.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: libstdc++
Assignee: unassigned at gcc dot gnu.org
Reporter: longfeiqiu2012 at gmail dot com
Target Milestone: ---
I built GCC 16.2.0 from source with the following configuration:
export TARGET=aarch64-none-elf
export PREFIX=/opt/aarch64-none-elf
export PROG_PREFIX=aarch64-none-elf-
../gcc-16.2.0/configure \
--target=$TARGET \
--prefix=$PREFIX \
--program-prefix=$PROG_PREFIX \
--with-as=/opt/aarch64-none-elf/bin/aarch64-none-elf-as \
--with-ld=/opt/aarch64-none-elf/bin/aarch64-none-elf-ld \
--disable-bootstrap \
--without-headers \
--with-newlib \
--disable-hosted-libstdcxx \
--enable-languages=c,c++
After installing this version of GCC, create a file test.cpp with one line:
#include <memory>
Then invoke g++ as follows:
aarch64-none-elf-g++ -std=c++26 -E -o test.ii test.cpp
g++ reports it could not find <bits/indirect.h>:
In file included from test.cpp:1:
/opt/aarch64-none-elf/aarch64-none-elf/include/c++/16.2.0/memory:101:12: fatal
error: bits/indirect.h: No such file or directory
101 | # include <bits/indirect.h>
|
This seems to be due to <memory> unconditionally including <bits/indirect.h> if
std is set to c++26.
libstdc++-v3/include/std/memory:101-103 reads:
#if __cplusplus > 202302L
# include <bits/indirect.h>
#endif
I was able to work around this by adding a #if _GLIBCXX_HOSTED guard around it.
I checked that the latest trunk version still does not have this guard.
Either add a hosted guard around this include or install the missing header to
freestanding builds.
