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The following patch improves handling of largefile support with procfs
on 32-bit Solaris. It has already been approved and installed for
binutils-gdb in the thread starting at
[PATCH] Unify Solaris procfs and largefile handling
https://sourceware.org/pipermail/gdb-patches/2020-June/169977.html
I'm syncing the config/largefile.m4 part to gcc now which is the master
for config. Since ACX_LARGEFILE isn't used anywhere in the gcc tree,
I'm installing it as obvious.
2020-09-09 Rainer Orth <ro@CeBiTec.Uni-Bielefeld.DE>
config:
* largefile.m4: Sync from binutils-gdb.
56 lines
2.0 KiB
Plaintext
56 lines
2.0 KiB
Plaintext
# This macro wraps AC_SYS_LARGEFILE with one exception for Solaris.
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# PR binutils/9992: We have to replicate everywhere the behaviour of
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# bfd's configure script so that all the directories agree on the size
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# of structures used to describe files.
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AC_DEFUN([ACX_LARGEFILE],[dnl
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# The tests for host and target for $enable_largefile require
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# canonical names.
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AC_REQUIRE([AC_CANONICAL_HOST])
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AC_REQUIRE([AC_CANONICAL_TARGET])
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# As the $enable_largefile decision depends on --enable-plugins we must set it
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# even in directories otherwise not depending on the $plugins option.
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AC_PLUGINS
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case "${host}" in
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sparc-*-solaris*|i?86-*-solaris*)
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# On native 32-bit Solaris/SPARC and x86, large-file and procfs support
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# were mutually exclusive until Solaris 11.3. Without procfs support,
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# the bfd/ elf module cannot provide certain routines such as
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# elfcore_write_prpsinfo or elfcore_write_prstatus. So unless the user
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# explicitly requested large-file support through the
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# --enable-largefile switch, disable large-file support in favor of
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# procfs support.
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#
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# Check if <sys/procfs.h> is incompatible with large-file support.
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AC_TRY_COMPILE([#define _FILE_OFFSET_BITS 64
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#define _STRUCTURED_PROC 1
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#include <sys/procfs.h>], , acx_cv_procfs_lfs=yes, acx_cv_procfs_lfs=no)
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#
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# Forcefully disable large-file support only if necessary, gdb is in
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# tree and enabled.
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if test "${target}" = "${host}" -a "$acx_cv_procfs_lfs" = no \
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-a -d $srcdir/../gdb -a "$enable_gdb" != no; then
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: ${enable_largefile="no"}
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if test "$plugins" = yes; then
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AC_MSG_WARN([
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plugin support disabled; require large-file support which is incompatible with GDB.])
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plugins=no
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fi
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fi
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#
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# Explicitly undef _FILE_OFFSET_BITS if enable_largefile=no for the
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# benefit of g++ 9+ which predefines it on Solaris.
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if test "$enable_largefile" = no; then
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LARGEFILE_CPPFLAGS="-U_FILE_OFFSET_BITS"
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AC_SUBST(LARGEFILE_CPPFLAGS)
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fi
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;;
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esac
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AC_SYS_LARGEFILE
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])
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