This patch to the libc/machine/nvptx port of newlib implements an approximation of "clock" and provides some additional stub routines. These changes not only reduce the number of (link) failures in the GCC testsuite when targeting nvptx-none, but also allow the NIST scimark4 benchmark to compile and run without modification. newlib already contains support for backends to provide their own clock implementations via -DCLOCK_PROVIDED. That functionality is used here to return an approximate elapsed time based on the NVidia GPU's clock64 cycle counter. Although not great, this is better than the current behaviour of link error from the unresolved symbol _times_r. The other part of the patch is to add a small number of stub functions to nvptx's misc.c. Adding isatty, for example, resolves linking problems in libc from the dependency in __smakebuf_r, and the sync stub, for example, fixes the failure with GCC's testsuite/gfortran.dg/ISO_Fortran_binding_14.f90 [which simply tests that gfortran can call a/any C function]. newlib/ configure.host: Add -DCLOCK_PROVIDED to newlib_cflags on nvptx*. newlib/libc/machine/nvptx Makefile.am: Add clock.c to lib_a_SOURCES. clock.c: New source file to implement/approximate clock(). misc.c: Add stubs for fstat, isatty, open, sync and unlink. |
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ChangeLog | ||
MAINTAINERS | ||
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configure | ||
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README
README for GNU development tools This directory contains various GNU compilers, assemblers, linkers, debuggers, etc., plus their support routines, definitions, and documentation. If you are receiving this as part of a GDB release, see the file gdb/README. If with a binutils release, see binutils/README; if with a libg++ release, see libg++/README, etc. That'll give you info about this package -- supported targets, how to use it, how to report bugs, etc. It is now possible to automatically configure and build a variety of tools with one command. To build all of the tools contained herein, run the ``configure'' script here, e.g.: ./configure make To install them (by default in /usr/local/bin, /usr/local/lib, etc), then do: make install (If the configure script can't determine your type of computer, give it the name as an argument, for instance ``./configure sun4''. You can use the script ``config.sub'' to test whether a name is recognized; if it is, config.sub translates it to a triplet specifying CPU, vendor, and OS.) If you have more than one compiler on your system, it is often best to explicitly set CC in the environment before running configure, and to also set CC when running make. For example (assuming sh/bash/ksh): CC=gcc ./configure make A similar example using csh: setenv CC gcc ./configure make Much of the code and documentation enclosed is copyright by the Free Software Foundation, Inc. See the file COPYING or COPYING.LIB in the various directories, for a description of the GNU General Public License terms under which you can copy the files. REPORTING BUGS: Again, see gdb/README, binutils/README, etc., for info on where and how to report problems.