The problem this patch fixes showed up after updating to gcc-5.3.0. The cuplrit is a change in gcc when emitting section attributes. It only shows up when building without optimization. Effect in Cygwin: ws2_32 functions failed to load. In the original code the definition of "NO_COPY wsadata" was preceeding an __asm__ block (the definition of the _wsock_init wrapper), while the definition of "NO_COPY here" immediately follows the same assembler block. When gcc-5.3.0 emits assembler code for the wsadata definition, it emits the .data_cygwin_nocopy section attribute. Next it emits the assembler output for the __asm_ block, entirely ignoring its content. The __asm__ block adds a .text section definition. Eventually gcc emits assembler code for the here definition. However, apparently gcc still "knows" that it just emitted the .data_cygwin_nocopy section attribute and so doesn't redefine it. Remember the __asm__? It changed the section to .text. So with gcc-4.9.3 we got: .section .data_cygwin_nocopy,"w" wsadata: __asm__ block: .text .section .data_cygwin_nocopy,"w" here: With gcc 5.3.0 we now get: .section .data_cygwin_nocopy,"w" wsadata: __asm__ block: .text here: So "here" is now in the .text segment which is read-only. Hilarity ensues. Signed-off-by: Corinna Vinschen <corinna@vinschen.de> |
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config | ||
etc | ||
include | ||
libgloss | ||
newlib | ||
texinfo | ||
winsup | ||
.gitattributes | ||
.gitignore | ||
COPYING | ||
COPYING.LIB | ||
COPYING.LIBGLOSS | ||
COPYING.NEWLIB | ||
COPYING3 | ||
COPYING3.LIB | ||
ChangeLog | ||
MAINTAINERS | ||
Makefile.def | ||
Makefile.in | ||
Makefile.tpl | ||
README | ||
README-maintainer-mode | ||
compile | ||
config-ml.in | ||
config.guess | ||
config.rpath | ||
config.sub | ||
configure | ||
configure.ac | ||
depcomp | ||
djunpack.bat | ||
install-sh | ||
libtool.m4 | ||
ltgcc.m4 | ||
ltmain.sh | ||
ltoptions.m4 | ||
ltsugar.m4 | ||
ltversion.m4 | ||
lt~obsolete.m4 | ||
makefile.vms | ||
missing | ||
mkdep | ||
mkinstalldirs | ||
move-if-change | ||
setup.com | ||
src-release | ||
symlink-tree | ||
ylwrap |
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.