[Bug fortran/126872] Change in visibility of C bound functions with 16.2.0

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=126872

--- Comment #2 from Patrick McNally <rpmcnally at gmail dot com> ---
The only version I see that produces the static symbol (t) is 16.2.0, though I
have not tried 17.  Every prior version that I've tested produces a global
symbol (T).  I'm happy to provide whatever information would be helpful, but
since I don't often submit reports, I might need some guidance on the type of
information you want.

I'm using a gcc-16.2.0 I built from source with:

../configure --prefix=/opt/create/gcc/16.2.0 --disable-multilib
--enable-languages=c,c++,fortran --enable-shared

Additional information:

$ gfortran -v
Using built-in specs.
COLLECT_GCC=gfortran
COLLECT_LTO_WRAPPER=/home/create/gcc/16.2.0/bin/../libexec/gcc/x86_64-pc-linux-gnu/16.2.0/lto-wrapper
Target: x86_64-pc-linux-gnu
Configured with: ../configure --prefix=/opt/create/gcc/16.2.0
--disable-multilib --enable-languages=c,c++,fortran --enable-shared
Thread model: posix
Supported LTO compression algorithms: zlib zstd
gcc version 16.2.0 (GCC) 


$ cat /etc/os-release 
NAME="Red Hat Enterprise Linux"
VERSION="8.10 (Ootpa)"
ID="rhel"
ID_LIKE="fedora"
VERSION_ID="8.10"
PLATFORM_ID="platform:el8"
PRETTY_NAME="Red Hat Enterprise Linux 8.10 (Ootpa)"
ANSI_COLOR="0;31"
CPE_NAME="cpe:/o:redhat:enterprise_linux:8::baseos"
HOME_URL="https://www.redhat.com/"
DOCUMENTATION_URL="https://access.redhat.com/documentation/en-us/red_hat_enterprise_linux/8"
BUG_REPORT_URL="https://issues.redhat.com/"

REDHAT_BUGZILLA_PRODUCT="Red Hat Enterprise Linux 8"
REDHAT_BUGZILLA_PRODUCT_VERSION=8.10
REDHAT_SUPPORT_PRODUCT="Red Hat Enterprise Linux"
REDHAT_SUPPORT_PRODUCT_VERSION="8.10"