https://gcc.gnu.org/bugzilla/show_bug.cgi?id=118010
--- Comment #12 from Sam James <sjames at gcc dot gnu.org> ---
Huh, I'm actually still seeing this:
```
m2/gm2-libs-boot/Glibc.h:207:14: warning: type of ‘libc_lseek’ does not match
original declaration [-Wlto-type-mismatch]
207 | EXTERN off_t libc_lseek (int fd, ssize_t offset, int whence);
| ^
/var/tmp/portage/sys-devel/gcc-15.0.9999/work/gcc-15.0.9999/gcc/m2/mc-boot-ch/Glibc.c:356:1:
note: type mismatch in parameter 2
356 | libc_lseek (int fd, off_t offset, int whence)
| ^
/var/tmp/portage/sys-devel/gcc-15.0.9999/work/gcc-15.0.9999/gcc/m2/mc-boot-ch/Glibc.c:356:1:
note: type ‘off_t’ should match type ‘ssize_t’
/var/tmp/portage/sys-devel/gcc-15.0.9999/work/gcc-15.0.9999/gcc/m2/mc-boot-ch/Glibc.c:356:1:
note: ‘libc_lseek’ was previously declared here
/var/tmp/portage/sys-devel/gcc-15.0.9999/work/gcc-15.0.9999/gcc/m2/mc-boot-ch/Glibc.c:356:1:
note: code may be misoptimized unless ‘-fno-strict-aliasing’ is used
```
with
```
Using built-in specs.
COLLECT_GCC=gcc
COLLECT_LTO_WRAPPER=/usr/libexec/gcc/armv7a-unknown-linux-gnueabihf/15/lto-wrapper
Target: armv7a-unknown-linux-gnueabihf
Configured with:
/var/tmp/portage/sys-devel/gcc-15.0.9999/work/gcc-15.0.9999/configure
--host=armv7a-unknown-linux-gnueabihf --build=armv7a-unknown-linux-gnueabihf
--prefix=/usr --bindir=/usr/armv7a-unknown-linux-gnueabihf/gcc-bin/15
--includedir=/usr/lib/gcc/armv7a-unknown-linux-gnueabihf/15/include
--datadir=/usr/share/gcc-data/armv7a-unknown-linux-gnueabihf/15
--mandir=/usr/share/gcc-data/armv7a-unknown-linux-gnueabihf/15/man
--infodir=/usr/share/gcc-data/armv7a-unknown-linux-gnueabihf/15/info
--with-gxx-include-dir=/usr/lib/gcc/armv7a-unknown-linux-gnueabihf/15/include/g++-v15
--disable-silent-rules --disable-dependency-tracking
--with-python-dir=/share/gcc-data/armv7a-unknown-linux-gnueabihf/15/python
--enable-objc-gc --enable-languages=c,c++,d,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
9ffb270464521895475f4e645b3df333d111c521' --with-gcc-major-version-only
--enable-libstdcxx-time --enable-lto --disable-libstdcxx-pch --enable-shared
--enable-threads=posix --enable-__cxa_atexit --enable-clocale=gnu
--disable-multilib --disable-fixed-point --with-float=hard --with-arch=armv7-a
--with-float=hard --with-fpu=vfpv3-d16 --enable-libgomp --disable-libssp
--enable-libada --disable-systemtap --disable-valgrind-annotations
--disable-vtable-verify --disable-libvtv --with-zstd --with-isl
--disable-isl-version-check --enable-default-pie --enable-host-pie
--enable-host-bind-now --enable-default-ssp --disable-fixincludes
--with-build-config=bootstrap-lto
Thread model: posix
Supported LTO compression algorithms: zlib zstd
gcc version 15.0.1 20250113 (experimental)
0cf06bf0d7fd83549f0f410df57f8113fdc63da2 (Gentoo 15.0.9999 p, commit
9ffb270464521895475f4e645b3df333d111c521)
```
(and those *_FLAGS variables I mentioned)
