[Emacs-diffs] Changes to emacs/etc/PROBLEMS

[Jan Djärv]

Index: emacs/etc/PROBLEMS
diff -c emacs/etc/PROBLEMS:1.170 emacs/etc/PROBLEMS:1.171
*** emacs/etc/PROBLEMS:1.170    Sat Sep  4 12:25:43 2004
--- emacs/etc/PROBLEMS  Sat Sep 25 20:39:13 2004
***************
*** 2329,2356 ****
  *** Linux: Segfault during `make bootstrap' under certain recent versions of 
the Linux kernel.
  
  With certain recent Linux kernels (like the one of Redhat Fedora Core
! 1), the new "Exec-shield" functionality is enabled by default, which
  creates a different memory layout that breaks the emacs dumper.
  
  You can check the Exec-shield state like this:
  
      cat /proc/sys/kernel/exec-shield
  
! It returns 1 or 2 when Exec-shield is enabled, 0 otherwise.  Please
  read your system documentation for more details on Exec-shield and
! associated commands.
  
  When Exec-shield is enabled, building Emacs will segfault during the
  execution of this command:
  
! temacs --batch --load loadup [dump|bootstrap]
  
  To work around this problem, it is necessary to temporarily disable
! Exec-shield while building Emacs, using the `setarch' command like
! this:
  
-     setarch i386 ./configure <configure parameters>
-     setarch i386 make <make parameters>
  
  *** Fatal signal in the command  temacs -l loadup inc dump.
  
--- 2329,2362 ----
  *** Linux: Segfault during `make bootstrap' under certain recent versions of 
the Linux kernel.
  
  With certain recent Linux kernels (like the one of Redhat Fedora Core
! 1 and 2), the new "Exec-shield" functionality is enabled by default, which
  creates a different memory layout that breaks the emacs dumper.
  
+ Configure can overcome the problem of exec-shield if the architecture is
+ x86 and the program setarch is present.  On other architectures no
+ workaround is known.
+ 
  You can check the Exec-shield state like this:
  
      cat /proc/sys/kernel/exec-shield
  
! It returns non-zero when Exec-shield is enabled, 0 otherwise.  Please
  read your system documentation for more details on Exec-shield and
! associated commands.  Exec-shield can be turned off with this command:
! 
!     echo "0" > /proc/sys/kernel/exec-shield
  
  When Exec-shield is enabled, building Emacs will segfault during the
  execution of this command:
  
!     ./temacs --batch --load loadup [dump|bootstrap]
  
  To work around this problem, it is necessary to temporarily disable
! Exec-shield while building Emacs, or, on x86, by using the `setarch'
! command when running temacs like this:
! 
!     setarch i386 ./temacs --batch --load loadup [dump|bootstrap]
  
  
  *** Fatal signal in the command  temacs -l loadup inc dump.