config/largefile.m4

   1 # This macro wraps AC_SYS_LARGEFILE with one exception for Solaris.
   2 # PR binutils/9992: We have to replicate everywhere the behaviour of
   3 # bfd's configure script so that all the directories agree on the size
   4 # of structures used to describe files.
   5
   6 AC_DEFUN([ACX_LARGEFILE],[dnl
   7
   8 # The tests for host and target for $enable_largefile require
   9 # canonical names.
  10 AC_REQUIRE([AC_CANONICAL_HOST])
  11 AC_REQUIRE([AC_CANONICAL_TARGET])
  12
  13 # As the $enable_largefile decision depends on --enable-plugins we must set it
  14 # even in directories otherwise not depending on the $plugins option.
  15
  16 AC_PLUGINS
  17
  18 case "${host}" in
  19   sparc-*-solaris*|i?86-*-solaris*)
  20     # On native 32-bit Solaris/SPARC and x86, large-file and procfs support
  21     # were mutually exclusive until Solaris 11.3.  Without procfs support,
  22     # the bfd/ elf module cannot provide certain routines such as
  23     # elfcore_write_prpsinfo or elfcore_write_prstatus.  So unless the user
  24     # explicitly requested large-file support through the
  25     # --enable-largefile switch, disable large-file support in favor of
  26     # procfs support.
  27     #
  28     # Check if <sys/procfs.h> is incompatible with large-file support.
  29     AC_TRY_COMPILE([#define _FILE_OFFSET_BITS 64
  30 #define _STRUCTURED_PROC 1
  31 #include <sys/procfs.h>], , acx_cv_procfs_lfs=yes, acx_cv_procfs_lfs=no)
  32     #
  33     # Forcefully disable large-file support only if necessary, gdb is in
  34     # tree and enabled.
  35     if test "${target}" = "${host}" -a "$acx_cv_procfs_lfs" = no \
  36          -a -d $srcdir/../gdb -a "$enable_gdb" != no; then
  37       : ${enable_largefile="no"}
  38       if test "$plugins" = yes; then
  39         AC_MSG_WARN([
  40 plugin support disabled; require large-file support which is incompatible with GDB.])
  41         plugins=no
  42       fi
  43     fi
  44     #
  45     # Explicitly undef _FILE_OFFSET_BITS if enable_largefile=no for the
  46     # benefit of g++ 9+ which predefines it on Solaris.
  47     if test "$enable_largefile" = no; then
  48       LARGEFILE_CPPFLAGS="-U_FILE_OFFSET_BITS"
  49       AC_SUBST(LARGEFILE_CPPFLAGS)
  50     fi
  51     ;;
  52 esac
  53
  54 AC_SYS_LARGEFILE
  55 ])