Bring back nocombreloc if dumping

Without this patch, Emacs dumps core on Fedora 28 x86-64
when configured via "CC='gcc -m32' --enable-gcc-warnings
--without-imagemagick --without-gif --with-modules
PKG_CONFIG_LIBDIR=/usr/lib/pkgconfig:/usr/share/pkgconfig".
and then when run normally in a windowing system.
'make check' and 'emacs -nw' work OK even without the patch.
* configure.ac (LD_SWITCH_SYSTEM_TEMACS): Prepend
-znocombreloc if supported and if dumping.  This mostly
reverts 2018-06-15T21:37:39!eggert@cs.ucla.edu "Remove old
combreloc hack".

1 files changed, 12 insertions, 0 deletions

diff --git a/etc/PROBLEMS b/etc/PROBLEMS
index eba3420fcb8..6805e8733d5 100644
--- a/etc/PROBLEMS
+++ b/etc/PROBLEMS
@@ -192,6 +192,18 @@ Upgrading to a newer version of Exceed has been reported to prevent
 these crashes.  You should consider switching to a free X server, such
 as Xming or Cygwin/X.
 
+** Emacs crashes with SIGSEGV in XtInitializeWidgetClass.
+
+It crashes on X, but runs fine when called with option "-nw".
+
+This has been observed when Emacs is linked with GNU ld but without passing
+the -z nocombreloc flag.  Emacs normally knows to pass the -z nocombreloc
+flag when needed, so if you come across a situation where the flag is
+necessary but missing, please report it via M-x report-emacs-bug.
+
+On platforms such as Solaris, you can also work around this problem by
+configuring your compiler to use the native linker instead of GNU ld.
+
 ** When Emacs is compiled with Gtk+, closing a display kills Emacs.
 
 There is a long-standing bug in GTK that prevents it from recovering