[Bug fortran/38082] New: string truncated on return from subroutine (calling mkdtemp bind(c))

["holst at matmech dot com" <gcc-bugzilla at gcc dot gnu dot org>]

Hi!

I am using the gfortran compiler in Ubuntu 8.10 (gfortran 4.3.2).

I ran into a bug with calling mkdtemp(3) via the BIND(C) feature.
In some way gfortran truncates the string on return from the
Fortran subroutine. All results seems to be Ok inside
the Fortran subroutine but the caller does not get the proper value?

Please look at the examples below and mkdtemp(3) as they explain
better than I can with my poor English. :-)

Wrong results from gfortran:
na56:1d_longtime>gfortran -o callbug callbug.f90
na56:1d_longtime>./callbug
 ctemp = /tmp/foo.XXXXXX
 ctemp after call: /tmp/foo.HMq3kW
 template = [/tmp/foo.HMq3kW]
 template = .HMq3kW
na56:1d_longtime>

Correct results from sunstudio 12
na56:1d_longtime>sunf95 -o callbug callbug.f90
na56:1d_longtime>./callbug
 ctemp = /tmp/foo.XXXXXX
 ctemp after call: /tmp/foo.lEniI6
 template = [/tmp/foo.lEniI6]
 template = /tmp/foo.lEniI6
na56:1d_longtime>

I will attach the source code in another post.

Thank you for a great compiler!

Henrik Holst

--

Using built-in specs.
Target: i486-linux-gnu
Configured with: ../src/configure -v --with-pkgversion='Ubuntu 4.3.2-1ubuntu11'
--with-bugurl=file:///usr/share/doc/gcc-4.3/README.Bugs
--enable-languages=c,c++,fortran,objc,obj-c++ --prefix=/usr --enable-shared
--with-system-zlib --libexecdir=/usr/lib --without-included-gettext
--enable-threads=posix --enable-nls --with-gxx-include-dir=/usr/include/c++/4.3
--program-suffix=-4.3 --enable-clocale=gnu --enable-libstdcxx-debug
--enable-objc-gc --enable-mpfr --enable-targets=all --enable-checking=release
--build=i486-linux-gnu --host=i486-linux-gnu --target=i486-linux-gnu
Thread model: posix
gcc version 4.3.2 (Ubuntu 4.3.2-1ubuntu11)


-- 
           Summary: string truncated on return from subroutine (calling
                    mkdtemp bind(c))
           Product: gcc
           Version: 4.3.2
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: fortran
        AssignedTo: unassigned at gcc dot gnu dot org
        ReportedBy: holst at matmech dot com
GCC target triplet: i486-linux-gnu


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=38082