aboutsummaryrefslogtreecommitdiff
path: root/binutils/configure
diff options
context:
space:
mode:
authorRainer Orth <ro@CeBiTec.Uni-Bielefeld.DE>2020-07-30 15:41:50 +0200
committerRainer Orth <ro@CeBiTec.Uni-Bielefeld.DE>2020-07-30 15:41:50 +0200
commitc8693053f895626ae90b7856d3738de47d14d52c (patch)
tree5ad144e00bc7869c46be99285cf8eda128f7d111 /binutils/configure
parentac2599c44788ae34a6b26b5dc42848d176f99a5d (diff)
downloadgdb-c8693053f895626ae90b7856d3738de47d14d52c.zip
gdb-c8693053f895626ae90b7856d3738de47d14d52c.tar.gz
gdb-c8693053f895626ae90b7856d3738de47d14d52c.tar.bz2
Unify Solaris procfs and largefile handling
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.
Diffstat (limited to 'binutils/configure')
-rwxr-xr-xbinutils/configure64
1 files changed, 53 insertions, 11 deletions
diff --git a/binutils/configure b/binutils/configure
index 18316b7..6dde305 100755
--- a/binutils/configure
+++ b/binutils/configure
@@ -691,6 +691,7 @@ DEBUGINFOD_CFLAGS
PKG_CONFIG_LIBDIR
PKG_CONFIG_PATH
PKG_CONFIG
+LARGEFILE_CPPFLAGS
OTOOL64
OTOOL
LIPO
@@ -11551,7 +11552,7 @@ else
lt_dlunknown=0; lt_dlno_uscore=1; lt_dlneed_uscore=2
lt_status=$lt_dlunknown
cat > conftest.$ac_ext <<_LT_EOF
-#line 11554 "configure"
+#line 11555 "configure"
#include "confdefs.h"
#if HAVE_DLFCN_H
@@ -11657,7 +11658,7 @@ else
lt_dlunknown=0; lt_dlno_uscore=1; lt_dlneed_uscore=2
lt_status=$lt_dlunknown
cat > conftest.$ac_ext <<_LT_EOF
-#line 11660 "configure"
+#line 11661 "configure"
#include "confdefs.h"
#if HAVE_DLFCN_H
@@ -12007,15 +12008,56 @@ fi
case "${host}" in
- sparc-*-solaris*|i[3-7]86-*-solaris*)
- # On native 32bit sparc and ia32 solaris, large-file and procfs support
- # are mutually exclusive; and without procfs support, the bfd/ elf module
- # cannot provide certain routines such as elfcore_write_prpsinfo
- # or elfcore_write_prstatus. So unless the user explicitly requested
- # large-file support through the --enable-largefile switch, disable
- # large-file support in favor of procfs support.
- test "${target}" = "${host}" -a "x$plugins" = xno \
- && : ${enable_largefile="no"}
+ sparc-*-solaris*|i?86-*-solaris*)
+ # On native 32-bit Solaris/SPARC and x86, large-file and procfs support
+ # were mutually exclusive until Solaris 11.3. Without procfs support,
+ # the bfd/ elf module cannot provide certain routines such as
+ # elfcore_write_prpsinfo or elfcore_write_prstatus. So unless the user
+ # explicitly requested large-file support through the
+ # --enable-largefile switch, disable large-file support in favor of
+ # procfs support.
+ #
+ # Check if <sys/procfs.h> is incompatible with large-file support.
+ cat confdefs.h - <<_ACEOF >conftest.$ac_ext
+/* end confdefs.h. */
+#define _FILE_OFFSET_BITS 64
+#define _STRUCTURED_PROC 1
+#include <sys/procfs.h>
+int
+main ()
+{
+
+ ;
+ return 0;
+}
+_ACEOF
+if ac_fn_c_try_compile "$LINENO"; then :
+ acx_cv_procfs_lfs=yes
+else
+ acx_cv_procfs_lfs=no
+fi
+rm -f core conftest.err conftest.$ac_objext conftest.$ac_ext
+ #
+ # Forcefully disable large-file support only if necessary, gdb is in
+ # tree and enabled.
+ if test "${target}" = "${host}" -a "$acx_cv_procfs_lfs" = no \
+ -a -d $srcdir/../gdb -a "$enable_gdb" != no; then
+ : ${enable_largefile="no"}
+ if test "$plugins" = yes; then
+ { $as_echo "$as_me:${as_lineno-$LINENO}: WARNING:
+plugin support disabled; require large-file support which is incompatible with GDB." >&5
+$as_echo "$as_me: WARNING:
+plugin support disabled; require large-file support which is incompatible with GDB." >&2;}
+ plugins=no
+ fi
+ fi
+ #
+ # Explicitly undef _FILE_OFFSET_BITS if enable_largefile=no for the
+ # benefit of g++ 9+ which predefines it on Solaris.
+ if test "$enable_largefile" = no; then
+ LARGEFILE_CPPFLAGS="-U_FILE_OFFSET_BITS"
+
+ fi
;;
esac