http://gcc.gnu.org/bugzilla/show_bug.cgi?id=49111
Summary: Unnecessary warning for private interfaces having the
BIND(C) attribute
Product: gcc
Version: 4.6.1
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: fortran
AssignedTo: unassig...@gcc.gnu.org
ReportedBy: jwmwal...@gmail.com
When the following module:
module mod1
use iso_c_binding
implicit none
save
interface
function strerror(errnum) bind(C, NAME = 'strerror')
import
type(C_PTR) :: strerror
integer(C_INT), value :: errnum
end function
end interface
private strerror
end module mod1
gfortran warns about the private symbol 'strerror' being given a binding label.
The exact warning is:
...:~$ gfortran -c test_gfortran_private_cbinding.f90
test_gfortran_private_cbinding.f90:8.8:
function strerror(errnum) bind(C, NAME = 'strerror')
1
Warning: Symbol 'strerror' at (1) is marked PRIVATE but has been given the
binding label 'strerror'
In sections 5.3.2 and 5.3.5 of the Fortran 2008 standard, there seems to be no
restriction between the BIND and PRIVATE attributes ---i.e., the BIND(C)
attribute is compatible with the PRIVATE attribute, and therefore no warning
should be issued by the gfortran.
The version information is:
...:~$ gfortran -v
Using built-in specs.
COLLECT_GCC=gfortran
COLLECT_LTO_WRAPPER=/usr/lib/x86_64-linux-gnu/gcc/x86_64-linux-gnu/4.6.1/lto-wrapper
Target: x86_64-linux-gnu
Configured with: ../src/configure -v --with-pkgversion='Ubuntu 4.6.0-3~ppa1'
--with-bugurl=file:///usr/share/doc/gcc-4.6/README.Bugs
--enable-languages=c,c++,fortran,objc,obj-c++,go --prefix=/usr
--program-suffix=-4.6 --enable-shared --enable-multiarch
--with-multiarch-defaults=x86_64-linux-gnu --enable-linker-build-id
--with-system-zlib --libexecdir=/usr/lib/x86_64-linux-gnu
--without-included-gettext --enable-threads=posix
--with-gxx-include-dir=/usr/include/c++/4.6 --libdir=/usr/lib/x86_64-linux-gnu
--enable-nls --with-sysroot=/ --enable-clocale=gnu --enable-libstdcxx-debug
--enable-libstdcxx-time=yes --enable-plugin --enable-objc-gc --disable-werror
--with-arch-32=i686 --with-tune=generic --enable-checking=release
--build=x86_64-linux-gnu --host=x86_64-linux-gnu --target=x86_64-linux-gnu
Thread model: posix
gcc version 4.6.1 20110409 (prerelease) (Ubuntu 4.6.0-3~ppa1)
The system information (for Ubuntu 11.04) is:
...:~$ uname -srvmpio
Linux 2.6.38-8-generic #42-Ubuntu SMP Mon Apr 11 03:31:24 UTC 2011 x86_64
x86_64 x86_64 GNU/Linux
