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There's no need to have a sys/ subdir just to copy the sys/$arch/crt0.o
up to sys/crt0.o, and then have libc/ copy sys/crt0.o up again. Just
have libc/ refer to sys/$arch/crt0.o directly and drop the intermediate
makefile entirely.
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The sys/{configure,Makefile} files exist to fan out to the specific
sys/$arch/ subdir, and to possibly generate a crt0. We already have
all that same info in the libc/ dir itself, so by moving the recursive
configure and make calls into it, we can cut off some of this logic
entirely and save the overhead.
For arches that don't have a sys subdir, it means they can skip the
logic entirely.
The sys subdir itself is kept for the crt0 logic, for now. We'll try
and clean that up next.
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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.
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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.
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Add makedocbook, a tool to process makedoc markup and output DocBook XML
refentries.
Process all the source files which are processed with makedoc with
makedocbook as well
Add chapter-texi2docbook, a tool to automatically generate DocBook XML
chapter files from the chapter .texi files. For generating man pages all we
care about is the content of the refentries, so all this needs to do is
convert the @include of the makedoc generated .def files to xi:include of
the makedocbook generated .xml files.
Add skeleton Docbook XML book files, lib[cm].in.xml which include these
generated chapters, which in turn include the generated files containing
refentries, which is processed with xsltproc to generate the lib[cm].xml
Add new make targets to generate and install man pages from lib[cm].xml
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This reverts commit 041ea4106881a3434e63ca95a38c911515793f09.
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Add makedocbook, a tool to process makedoc markup and output DocBook XML
refentries.
Process all the source files which are processed with makedoc with
makedocbook as well
Add chapter-texi2docbook, a tool to automatically generate DocBook XML
chapter files from the chapter .texi files. For generating man pages all we
care about is the content of the refentries, so all this needs to do is
convert the @include of the makedoc generated .def files to xi:include of
the makedocbook generated .xml files.
Add skeleton Docbook XML book files, lib[cm].in.xml which include these
generated chapters, which in turn include the generated files containing
refentries, which is processed with xsltproc to generate the lib[cm].xml
Add new make targets to generate and install man pages from lib[cm].xml
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* libtool.m4: Update from GCC.
* ltsugar.m4: New. Update from GCC.
* ltversion.m4: New. Update from GCC.
* ltoptions.m4: New. Update from GCC.
* ltconfig: Remove.
* ltcf-c.sh: Remove.
* ltcf-cxx.sh: Remove.
* ltcf-gcj.sh: Remove.
* src-release: Update with new libtool file list.
* newlib/*/configure.in: invoke _LD_DECL_SED.
* newlib/*/Makefile.am: Ensure toplevel is included in ACLOCAL_AMFLAGS.
* Regenerate subdirectories
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* libc/sys/linux/shared.ld: New file.
* libm/machine/*: New files.
* libm/machine/i386/*: New files.
* Makefile.am: Add libtool support. Change math and mathfp
references to variables.
* configure.host: Add variables for libtool support. Add
libm_machine_dir variable.
* configure.in: Add objectlist variables, for libtool
support. Add CC_FOR_BUILD tests.
* libc/Makefile.am: Add libtool support. Change crt0.o
reference to be a variable reference.
* libc/configure.in: Add libtool support. Change sublib
names to be lib${subdir}.la when using libtool.
* libc/ctype/Makefile.am: Add libtool support.
* libc/errno/Makefile.am: Likewise.
* libc/locale/Makefile.am: Likewise.
* libc/machine/Makefile.am: Likewise.
* libc/machine/configure.in: Likewise.
* libc/machine/i386/Makefile.am: Likewise.
* libc/machine/i386/configure.in: Likewise.
* libc/misc/Makefile.am: Likewise.
* libc/posix/Makefile.am: Likewise.
* libc/reent/Makefile.am: Likewise.
* libc/signal/Makefile.am: Likewise.
* libc/stdio/Makefile.am: Likewise.
* libc/stdlib/Makefile.am: Likewise.
* libc/string/Makefile.am: Likewise.
* libc/sys/Makefile.am: Likewise.
* libc/sys/configure.in: Likewise.
* libc/sys/linux/Makefile.am: Add libtool support. Change
awk reference to a variable reference. Change signal.h
reference to a variable reference.
* libc/sys/linux/configure.in: Add libtool support.
* libc/syscalls/Makefile.am: Likewise.
* libc/time/Makefile.am: Likewise.
* libc/unix/Makefile.am: Likewise.
* libm/Makefile.am: Add libtool support. Change math and
mathfp references to variables.
* libm/configure.in: Add libtool support. Add
LIBM_MACHINE_LIB variable.
* libm/common/Makefile.am: Add libtool support.
* libm/math/Makefile.am: Likewise.
* libm/mathfp/Makefile.am: Likewise.
Regenerate all Makefile.in, aclocal.m4, and configure.
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