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c8693053f8
GDB currently doesn't build on 32-bit Solaris:
* On Solaris 11.4/x86:
In file included from /usr/include/sys/procfs.h:26,
from /vol/src/gnu/gdb/hg/master/dist/gdb/i386-sol2-nat.c:24:
/usr/include/sys/old_procfs.h:31:2: error: #error "Cannot use procfs in the large file compilation environment"
#error "Cannot use procfs in the large file compilation environment"
^~~~~
* On Solaris 11.3/x86 there are several more instances of this.
The interaction between procfs and large-file support historically has
been a royal mess on Solaris:
* There are two versions of the procfs interface:
** The old ioctl-based /proc, deprecated and not used any longer in
either gdb or binutils.
** The `new' (introduced in Solaris 2.6, 1997) structured /proc.
* There are two headers one can possibly include:
** <procfs.h> which only provides the structured /proc, definining
_STRUCTURED_PROC=1 and then including ...
** <sys/procfs.h> which defaults to _STRUCTURED_PROC=0, the ioctl-based
/proc, but provides structured /proc if _STRUCTURED_PROC == 1.
* procfs and the large-file environment didn't go well together:
** Until Solaris 11.3, <sys/procfs.h> would always #error in 32-bit
compilations when the large-file environment was active
(_FILE_OFFSET_BITS == 64).
** In both Solaris 11.4 and Illumos, this restriction was lifted for
structured /proc.
So one has to be careful always to define _STRUCTURED_PROC=1 when
testing for or using <sys/procfs.h> on Solaris. As the errors above
show, this isn't always the case in binutils-gdb right now.
Also one may need to disable large-file support for 32-bit compilations
on Solaris. config/largefile.m4 meant to do this by wrapping the
AC_SYS_LARGEFILE autoconf macro with appropriate checks, yielding
ACX_LARGEFILE. Unfortunately the macro doesn't always succeed because
it neglects the _STRUCTURED_PROC part.
To make things even worse, since GCC 9 g++ predefines
_FILE_OFFSET_BITS=64 on Solaris. So even if largefile.m4 deciced not to
enable large-file support, this has no effect, breaking the gdb build.
This patch addresses all this as follows:
* All tests for the <sys/procfs.h> header are made with
_STRUCTURED_PROC=1, the definition going into the various config.h
files instead of having to make them (and sometimes failing) in the
affected sources.
* To cope with the g++ predefine of _FILE_OFFSET_BITS=64,
-U_FILE_OFFSET_BITS is added to various *_CPPFLAGS variables. It had
been far easier to have just
#undef _FILE_OFFSET_BITS
in config.h, but unfortunately such a construct in config.in is
commented by config.status irrespective of indentation and whitespace
if large-file support is disabled. I found no way around this and
putting the #undef in several global headers for bfd, binutils, ld,
and gdb seemed way more invasive.
* Last, the applicability check in largefile.m4 was modified only to
disable largefile support if really needed. To do so, it checks if
<sys/procfs.h> compiles with _FILE_OFFSET_BITS=64 defined. If it
doesn't, the disabling only happens if gdb exists in-tree and isn't
disabled, otherwise (building binutils from a tarball), there's no
conflict.
What initially confused me was the check for $plugins here, which
originally caused the disabling not to take place. Since AC_PLUGINGS
does enable plugin support if <dlfcn.h> exists (which it does on
Solaris), the disabling never happened.
I could find no explanation why the linker plugin needs large-file
support but thought it would be enough if gld and GCC's lto-plugin
agreed on the _FILE_OFFSET_BITS value. Unfortunately, that's not
enough: lto-plugin uses the simple-object interface from libiberty,
which includes off_t arguments. So to fully disable large-file
support would mean also disabling it in libiberty and its users: gcc
and libstdc++-v3. This seems highly undesirable, so I decided to
disable the linker plugin instead if large-file support won't work.
The patch allows binutils+gdb to build on i386-pc-solaris2.11 (both
Solaris 11.3 and 11.4, using GCC 9.3.0 which is the worst case due to
predefined _FILE_OFFSET_BITS=64). Also regtested on
amd64-pc-solaris2.11 (again on Solaris 11.3 and 11.4),
x86_64-pc-linux-gnu and i686-pc-linux-gnu.
config:
* largefile.m4 (ACX_LARGEFILE) <sparc-*-solaris*|i?86-*-solaris*>:
Check for <sys/procfs.h> incompatilibity with large-file support
on Solaris.
Only disable large-file support and perhaps plugins if needed.
Set, substitute LARGEFILE_CPPFLAGS if so.
bfd:
* bfd.m4 (BFD_SYS_PROCFS_H): New macro.
(BFD_HAVE_SYS_PROCFS_TYPE): Require BFD_SYS_PROCFS_H.
Don't define _STRUCTURED_PROC.
(BFD_HAVE_SYS_PROCFS_TYPE_MEMBER): Likewise.
* elf.c [HAVE_SYS_PROCFS_H] (_STRUCTURED_PROC): Don't define.
* configure.ac: Use BFD_SYS_PROCFS_H to check for <sys/procfs.h>.
* configure, config.in: Regenerate.
* Makefile.am (AM_CPPFLAGS): Add LARGEFILE_CPPFLAGS.
* Makefile.in, doc/Makefile.in: Regenerate.
binutils:
* Makefile.am (AM_CPPFLAGS): Add LARGEFILE_CPPFLAGS.
* Makefile.in, doc/Makefile.in: Regenerate.
* configure: Regenerate.
gas:
* Makefile.am (AM_CPPFLAGS): Add LARGEFILE_CPPFLAGS.
* Makefile.in, doc/Makefile.in: Regenerate.
* configure: Regenerate.
gdb:
* proc-api.c (_STRUCTURED_PROC): Don't define.
* proc-events.c: Likewise.
* proc-flags.c: Likewise.
* proc-why.c: Likewise.
* procfs.c: Likewise.
* Makefile.in (INTERNAL_CPPFLAGS): Add LARGEFILE_CPPFLAGS.
* configure, config.in: Regenerate.
gdbserver:
* configure, config.in: Regenerate.
gdbsupport:
* Makefile.am (AM_CPPFLAGS): Add LARGEFILE_CPPFLAGS.
* common.m4 (GDB_AC_COMMON): Use BFD_SYS_PROCFS_H to check for
<sys/procfs.h>.
* Makefile.in: Regenerate.
* configure, config.in: Regenerate.
gnulib:
* configure.ac: Run ACX_LARGEFILE before gl_EARLY.
* configure: Regenerate.
gprof:
* Makefile.am (AM_CPPFLAGS): Add LARGEFILE_CPPFLAGS.
* Makefile.in: Regenerate.
* configure: Regenerate.
ld:
* Makefile.am (AM_CPPFLAGS): Add LARGEFILE_CPPFLAGS.
* Makefile.in: Regenerate.
* configure: Regenerate.
106 lines
3.4 KiB
Makefile
106 lines
3.4 KiB
Makefile
## Process this file with automake to generate Makefile.in
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#
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# Copyright (C) 2012-2020 Free Software Foundation, Inc.
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#
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# This file is free software; you can redistribute it and/or modify
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# it under the terms of the GNU General Public License as published by
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# the Free Software Foundation; either version 3 of the License, or
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# (at your option) any later version.
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#
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# This program is distributed in the hope that it will be useful,
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# but WITHOUT ANY WARRANTY; without even the implied warranty of
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# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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# GNU General Public License for more details.
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#
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# You should have received a copy of the GNU General Public License
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# along with this program; see the file COPYING3. If not see
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# <http://www.gnu.org/licenses/>.
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#
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AUTOMAKE_OPTIONS = foreign no-dist no-texinfo.tex info-in-builddir
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ACLOCAL_AMFLAGS = -I .. -I ../config -I ../bfd
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TEXINFO_TEX = ../texinfo/texinfo.tex
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SUFFIXES = .c .m
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SUBDIRS = po
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BASEDIR = $(srcdir)/..
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BFDDIR = $(BASEDIR)/bfd
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INCDIR = $(BASEDIR)/include
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WARN_CFLAGS = @WARN_CFLAGS@
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NO_WERROR = @NO_WERROR@
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AM_CFLAGS = $(WARN_CFLAGS)
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AM_CPPFLAGS = -DDEBUG -I../bfd -I$(srcdir)/../include \
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-I$(srcdir)/../bfd @INCINTL@ @LARGEFILE_CPPFLAGS@ -I. \
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-DLOCALEDIR="\"$(datadir)/locale\""
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bin_PROGRAMS = gprof
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## Convenience var listing pure sources.
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sources = basic_blocks.c call_graph.c cg_arcs.c cg_dfn.c \
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cg_print.c corefile.c gmon_io.c gprof.c hertz.c hist.c source.c \
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search_list.c symtab.c sym_ids.c utils.c \
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i386.c alpha.c vax.c sparc.c mips.c aarch64.c
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gprof_SOURCES = $(sources) flat_bl.c bsd_callg_bl.c fsf_callg_bl.c
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gprof_DEPENDENCIES = ../bfd/libbfd.la ../libiberty/libiberty.a $(LIBINTL_DEP)
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gprof_LDADD = ../bfd/libbfd.la ../libiberty/libiberty.a $(LIBINTL)
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noinst_HEADERS = \
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basic_blocks.h call_graph.h cg_arcs.h cg_dfn.h cg_print.h \
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corefile.h gmon.h gmon_io.h gmon_out.h gprof.h hertz.h hist.h \
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search_list.h source.h sym_ids.h symtab.h utils.h
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BUILT_SOURCES = flat_bl.c bsd_callg_bl.c fsf_callg_bl.c
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EXTRA_DIST = $(BUILT_SOURCES) bbconv.pl $(man_MANS)
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diststuff: $(BUILT_SOURCES) info $(man_MANS)
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# development.sh is used to determine -Werror default.
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CONFIG_STATUS_DEPENDENCIES = $(BFDDIR)/development.sh
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# This empty rule is a hack against gmake patched by Apple.
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%.o:%.m
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.m.c:
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awk -f $(srcdir)/gen-c-prog.awk > $@ \
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FUNCTION=`(echo $*|sed -e 's,.*/,,g' -e 's/_bl//')`_blurb \
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FILE=$*.m $<
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POTFILES = $(sources) $(noinst_HEADERS)
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po/POTFILES.in: @MAINT@ Makefile
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for f in $(POTFILES); do echo $$f; done | LC_ALL=C sort > tmp \
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&& mv tmp $(srcdir)/po/POTFILES.in
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MANCONF = -Dman
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TEXI2POD = perl $(srcdir)/../etc/texi2pod.pl $(AM_MAKEINFOFLAGS)
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POD2MAN = pod2man --center="GNU" --release="binutils-$(VERSION)" --section=1
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info_TEXINFOS = gprof.texi
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gprof_TEXINFOS = config.texi
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man_MANS = gprof.1
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AM_MAKEINFOFLAGS = -I "$(srcdir)" -I "$(top_srcdir)/../bfd/doc" -I ../bfd/doc
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TEXI2DVI = texi2dvi -I "$(srcdir)" -I "$(top_srcdir)/../bfd/doc" -I ../bfd/doc
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config.texi:
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echo "@set top_srcdir $(top_srcdir)" >> ./config.texi
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# Build the man page from the texinfo file
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# The sed command removes the no-adjust Nroff command so that
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# the man output looks standard.
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gprof.1: $(srcdir)/gprof.texi config.texi
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touch $@
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-$(TEXI2POD) $(MANCONF) -Dgprof < $(srcdir)/gprof.texi > gprof.pod
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-($(POD2MAN) gprof.pod | \
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sed -e '/^.if n .na/d' > $@.T$$$$ && \
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mv -f $@.T$$$$ $@) || \
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(rm -f $@.T$$$$ && exit 1)
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rm -f gprof.pod
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MAINTAINERCLEANFILES = gprof.info
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