Since automake already sets per-library CCASFLAGS to $(AM_CCASFLAGS)
by default, there's no need to explicitly set it here.
Many of these dirs don't have .S files in the first place, so the rule
doesn't even do anything. That can easily be seen when Makefile.in has
no changes as a result.
For the dirs with .S files, the custom rules are the same as the pattern
.S.o rules, so this is a nice cleanup.
The only dir that was adding extra flags (newlib/libc/machine/mn10300/)
to the per-library setting can have it moved to the global AM_CCASFLAGS
since the subdir only has one target. Although the setting just adds
extra debugging flags, so maybe it should be deleted in general.
There are a few dirs that we leave the redundant setting in place. This
is to workaround an automake limitation in subdirs that support building
with & w/out libtool:
https://www.gnu.org/software/automake/manual/html_node/Objects-created-both-with-libtool-and-without.html
The newlib & libgloss dirs are already generated using autoconf-2.69.
To avoid merging new code and/or accidental regeneration using diff
versions, leverage config/override.m4 to pin to 2.69 exactly. This
matches what gcc/binutils/gdb are already doing.
The README file already says to use autoconf-2.69.
To accomplish this, it's just as simple as adding -I flags to the
top-level config/ dir when running aclocal. This is because the
override.m4 file overrides AC_INIT to first require the specific
autoconf version before calling the real AC_INIT.
Since automake deprecated the INCLUDES name in favor of AM_CPPFLAGS,
change all existing users over. The generated code is the same since
the two variables have been used in the same exact places by design.
There are other cleanups to be done, but lets focus on just renaming
here so we can upgrade to a newer automake version w/out triggering
new warnings.
The 'cygnus' option was removed from automake 1.13 in 2012, so the
presence of this option prevents that or a later version of automake
being used.
A check-list of the effects of '--cygnus' from the automake 1.12
documentation, and steps taken (where possible) to preserve those
effects (See also this thread [1] for discussion on that):
[1] https://lists.gnu.org/archive/html/bug-automake/2012-03/msg00048.html
1. The foreign strictness is implied.
Already present in AM_INIT_AUTOMAKE in newlib/acinclude.m4
2. The options no-installinfo, no-dependencies and no-dist are implied.
Already present in AM_INIT_AUTOMAKE in newlib/acinclude.m4
Future work: Remove no-dependencies and any explicit header dependencies,
and use automatic dependency tracking instead. Are there explicit rules
which are now redundant to removing no-installinfo and no-dist?
3. The macro AM_MAINTAINER_MODE is required.
Already present in newlib/acinclude.m4
Note that maintainer-mode is still disabled by default.
4. Info files are always created in the build directory, and not in the
source directory.
This appears to be an error in the automake documentation describing
'--cygnus' [2]. newlib's info files are generated in the source
directory, and no special steps are needed to keep doing that.
[2] https://lists.gnu.org/archive/html/bug-automake/2012-04/msg00028.html
5. texinfo.tex is not required if a Texinfo source file is specified.
(The assumption is that the file will be supplied, but in a place that
automake cannot find.)
This effect is overriden by an explicit setting of the TEXINFO_TEX
variable (the directory part of which is fed into texi2X via the
TEXINPUTS environment variable).
6. Certain tools will be searched for in the build tree as well as in the
user's PATH. These tools are runtest, expect, makeinfo and texi2dvi.
For obscure automake reasons, this effect of '--cygnus' is not active
for makeinfo in newlib's configury.
However, there appears to be top-level configury which selects in-tree
runtest, expect and makeinfo, if present. So, if that works as it
appears, this effect is preserved. If not, this may cause problem if
anyone is building those tools in-tree.
This effect is not preserved for texi2dvi. This may cause problems if
anyone is building texinfo in-tree.
If needed, explicit checks for those tools looking in places relative to
$(top_srcdir)/../ as well as in PATH could be added.
7. The check target doesn't depend on all.
This effect is not preseved. The check target now depends on the all
target.
This concern seems somewhat academic given the current state of the
testsuite.
Also note that this doesn't touch libgloss.
* libc/sys/linux/Makefile.am: Add sig.c and sigaction.c. Also
make siglist.inc dependent on sig.c instead of signal.c.
* libc/sys/linux/Makefile.in: Regenerated.
* libc/sys/linux/sig.c: Rename from signal.c and change code to
use NSIG instead of _NSIG.
* libc/sys/linux/sigaction.c: New file.
* libc/sys/linux/signal.c: Changed to be linux signal() function
so as to override regular newlib default signal.c.
* libc/sys/linux/linuxthreads/config.h: Add __ASSUME_REALTIME_SIGNALS
definition.
* libc/sys/linux/linuxthreads/testrtsig.h: New file.
* libc/sys/linux/machine/i386/Makefile.am: Remove sigset.c.
* libc/sys/linux/machine/i386/Makefile.in: Regenerated.
* libc/sys/linux/machine/i386/sigset.c: Moved to linux main directory.
* libc/sys/linux/sigset.c: Moved from machine/i386 directory.
* libc/sys/linux/sys/signal.h: Redefine NSIG to _NSIG and override
default linux sigset_t typedef by defining it equal to __sigset_t.
* libc/unix/sigset.c: Add check so code isn't compiled on systems
with a sigset_t that isn't implemented with a single int.
* libc/sys/linux/Makefile.am: Add support for new files.
* libc/sys/linux/Makefile.in: Regenerated.
* libc/sys/linux/ids.c: Add __getuid weak alias for getuid.
* libc/sys/linux/signal.c: Change to use real-time syscalls for
sigsuspend, sigprocmask, and sigpending. Also remove sigaction as
it is in a separate file now.
* libc/sys/linux/machine/i386/Makefile.am
* libc/sys/linux/machine/i386/Makefile.in
* libc/sys/linux/sys/signal.h: Add include of <bits/signum.h>.
* libc/sys/linux/sigaction.c: New file.
* libc/sys/linux/sigqueue.c: Ditto.
* libc/sys/linux/sigwait.c: Ditto.
* libc/sys/linux/machine/i386/sigaction.c: Ditto.
* libc/sys/linux/kernel_sigaction.h: Ditto.
* libc/sys/linux/Makefile.am: Add resource.c.
* libc/sys/linux/Makefile.in: Regenerated.
* libc/sys/linux/resource.c: New file.
* libc/sys/linux/time.c: Add settimeofday, getitimer, and setitimer.
* libc/sys/linux/machine/i386/Makefile.am: Remove syscalls.c.
* libc/sys/linux/machine/i386/Makefile.in: Regenerated.
* libc/sys/linux/machine/i386/syscalls.c: Removed as functions
are now found in libc/sys/linux/resource.c.
* Makefile.am: Copy and install headers from sys/machine/include
directory. Also pass $toollibdir to lower-level directories.
* Makefile.in: Regenerated.
* libc/include/stdio.h[!_REENT_ONLY]: Change stdin, stdout, and
stderr to use _REENT macro instead of _impure_ptr directly.
* libc/include/sys/config.h[__i386__][__linux__]: Define
__DYNAMIC_REENT__.
* libc/include/sys/reent.h[!_REENT_ONLY]: Change _REENT macro to be
call to __getreent() function if !__SINGLE_THREAD__ and
__DYNAMIC_REENT__ is set.
* libc/reent/Makefile.am: Add support for getreent.c.
* libc/reent/Makefile.in: Regenerated.
* libc/string/strerror.c: Add check if EOPNOTSUPP and ENOTSUP are same.
* libc/sys/linux/Makefile.am: Add support for new files.
* libc/sys/linux/configure.in: Add $EXTRA_DIRS variable.
* libc/sys/linux/Makefile.in: Regenerated.
* libc/sys/linux/configure: Ditto.
* libc/sys/linux/io.c: Add poll syscall. Also weak-alias
__close, __read, __write, __poll, __open, __lseek, __fcntl from
their __libc_ counterparts.
* libc/sys/linux/io64.c: Add __libc_ prefix to lseek64 and open64
and weak-alias to regular names.
* libc/sys/linux/pread64.c: Rename to __libc_pread64 and weak-alias
to pread64 and __pread64.
* libc/sys/linux/process.c: Weak_alias __libc_getpid to __getpid.
* libc/sys/linux/pwrite64.c: Rename to __libc_pwrite64 and
weak-alias to pwrite64.
* libc/sys/linux/sched.c: Weak-alias __libc_sched_getparam,
__libc_sched_getscheduler, __libc_sched_get_priority_max,
__libc_sched_get_priority_min, and __libc_sched_setschedule to
name with __ instead of __libc_.
* libc/sys/linux/siglongjmp.c: Include <machine/weakalias.h>.
Rename siglongjmp to __libc_siglongjmp and weak-alias to siglongjmp.
Call __libc_longjmp instead of longjmp, from __libc_siglongjmp.
* libc/sys/linux/signal.c: Rename raise to __libc_raise and weak-alias
to raise.
* libc/sys/linux/socket.c: Weak-alias __libc_connect to __connect and
__libc_send to __send.
* libc/sys/linux/time.c: Weak-alias __libc_gettimeofday to
__gettimeofday.
* libc/sys/linux/wait.c: Rename wait to __libc_wait and weak-alias
it to wait. Rename wait3 to __libc_wait3 and weak-alias it to wait3.
* libc/sys/linux/include/setjmp.h: Use __jmp_buf in sigjmp_buf
type and typedef __jmp_buf to jmp_buf.
* libc/sys/linux/machine/i386/Makefile.am: Add syscalls.c and
setjmp.S.
* libc/sys/linux/machine/i386/Makefile.in: Regenerated.
* libc/sys/linux/machine/i386/crt0.c: Add support to clear .bss
section.
* libc/sys/linux/machine/i386/socketcall.h: Change to use __libc_
prefix for function macros and then use weak_alias() to regular names.
* libc/sys/linux/machine/i386/syscall.h: Ditto.
* libc/sys/linux/sys/errno.h: Define EOPNOTSUP to be ENOTSUP.
* libc/sys/linux/sys/stdio.h: Define _flockfile and _funlockfile
to be flockfile() and funlockfile() respectively.
* libc/sys/linux/sys/types.h
* libc/reent/getreent.c: New file.
* libc/sys/linux/flockfile.c: Ditto.
* libc/sys/linux/funlockfile.c: Ditto.
* libc/sys/linux/getreent.c: Ditto.
* libc/sys/linux/pread.c: Ditto.
* libc/sys/linux/pwrite.c: Ditto.
* libc/sys/linux/raise.c: Ditto.
* libc/sys/linux/system.c: Ditto.
* libc/sys/linux/tcdrain.c: Ditto.
* libc/sys/linux/machine/i386/i386mach.h: Ditto.
* libc/sys/linux/machine/i386/setjmp.S: Ditto.
* libc/sys/linux/machine/i386/syscalls.c: Ditto.
* libc/sys/linux/machine/i386/weakalias.h: Ditto.
* libc/sys/linux/machine/i386/include/setjmp.h: Ditto.
Mike Frysinger
Jon Turney
Ralf Wildenhues
Steve Ellcey
Jeff Johnston
Thomas Fitzsimmons