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This commit is the result of running the gdb/copyright.py script,
which automated the update of the copyright year range for all
source files managed by the GDB project to be updated to include
year 2023.
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This commit brings all the changes made by running gdb/copyright.py
as per GDB's Start of New Year Procedure.
For the avoidance of doubt, all changes in this commits were
performed by the script.
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The current setting assumes that gnulib is only used by dirs
immediately under the source root. Trying to build it two or
more levels deep fails. Switch GNULIB_BUILDDIR to a relative
GNULIB_PARENT_DIR so that it can be used to construct both the
build & source paths.
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A few sims use this to emulate the syscall & provide network
functionality.
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This commits the result of running gdb/copyright.py as per our Start
of New Year procedure...
gdb/ChangeLog
Update copyright year range in copyright header of all GDB files.
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An issue was reported here related to building GDB on MinGW:
https://sourceware.org/pipermail/gdb/2020-September/048927.html
It was suggested here:
https://sourceware.org/pipermail/gdb/2020-September/048931.html
that the solution might be to make use of $(LIB_GETRANDOM), a variable
defined in the gnulib makefile, when linking GDB.
In fact I think the issue is bigger than just LIB_GETRANDOM. When
using the script binutils-gdb/gnulib/update-gnulib.sh to reimport
gnulib there is a lot of output from gnulib's gnulib-tool. Part of
that output is this:
You may need to use the following makefile variables when linking.
Use them in <program>_LDADD when linking a program, or
in <library>_a_LDFLAGS or <library>_la_LDFLAGS when linking a library.
$(FREXPL_LIBM)
$(FREXP_LIBM)
$(INET_NTOP_LIB)
$(LIBTHREAD)
$(LIB_GETLOGIN)
$(LIB_GETRANDOM)
$(LIB_HARD_LOCALE)
$(LIB_MBRTOWC)
$(LIB_SETLOCALE_NULL)
$(LTLIBINTL) when linking with libtool, $(LIBINTL) otherwise
What I think this is telling us is that we should be including the
value of all these variables on the link line for gdb and gdbserver.
The problem though is that these variables are define in gnulib's
makefile, but are not (necessarily) defined in GDB's makefile.
One solution would be to recreate the checks that gnulib performs in
order to recreate these variables in both gdb's and gdbserver's
makefile. Though this shouldn't be too hard, most (if not all) of
these checks are in the form macros defined in m4 files in the gnulib
tree, so we could just reference these as needed. However, in this
commit I propose a different solution.
Currently, in the top level makefile, we give gdb and gdbserver a
dependency on gnulib. Once gnulib has finished building gdb and
gdbserver can start, these projects then have a hard coded (relative)
path to the compiled gnulib library in their makefiles.
In this commit I extend the gnulib configure script to install a new
makefile fragment in the gnulib build directory. This new file will
have the usual variable substitutions applied to it, and so can
include the complete list (see above) of all the extra libraries that
are needed when linking against gnulib.
In fact the new makefile fragment defines three variables, these are:
LIBGNU: The path to the archive containing gnulib. Can be used as a
dependency as when this file changes gdb/gdbserver should be
relinked.
LIBGNU_EXTRA_LIBS: A list of linker -l.... flags that should be
included in the link line of gdb/gdbserver. These are
libraries that $(LIBGNU) depends on. This list is taken from
the output of gnulib-tool, which is run by our
gnulib/update-gnulib.sh script.
INCGNU: A list of -I.... include paths that should be passed to the
compiler, these are where the gnulib headers can be found.
Now both gdb and gdbserver can include the makefile fragment and make
use of these variables.
The makefile fragment relies on the variable GNULIB_BUILDDIR being
defined. This is checked for in the fragment, and was already defined
in the makefiles of gdb and gdbserver.
gdb/ChangeLog:
* Makefile.in: Include Makefile.gnulib.inc. Don't define LIBGNU
or INCGNU. Make use of LIBGNU_EXTRA_LIBS when linking.
gdbserver/ChangeLog:
* Makefile.in: Include Makefile.gnulib.inc. Don't define LIBGNU
or INCGNU. Make use of LIBGNU_EXTRA_LIBS when linking.
gnulib/ChangeLog:
* Makefile.gnulib.inc.in: New file.
* Makefile.in: Regenerate.
* configure: Regenerate.
* configure.ac: Install the new file.
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