fix: emacs build failure due to high memory consumption on ppc64 (#1356919)

Resolves: #1356919

emacs-ppc64.patch

@@ -0,0 +1,62 @@
+commit ff3fc21e24edffccce0d42065833e852a6792bd2
+Author: Paul Eggert <eggert@cs.ucla.edu>
+Date:   Tue Jul 19 15:23:14 2016 +0200
+
+    Port to glibc 2.24 (pre-release) + ppc64
+    
+    Backport from master (Bug#24033).
+    Inspired by a suggestion by Florian Weimer in:
+    https://sourceware.org/ml/libc-alpha/2016-07/msg00425.html
+    * src/emacs.c (main) [__PPC64__]:
+    Special case for __PPC64__, which needs ASLR disabled in
+    dumped Emacs too.
+
+diff --git a/src/emacs.c b/src/emacs.c
+index 5c187e7..2480dfc 100644
+--- a/src/emacs.c
++++ b/src/emacs.c
+@@ -674,6 +674,26 @@ main (int argc, char **argv)
+ 
+   stack_base = &dummy;
+ 
++#if defined HAVE_PERSONALITY_LINUX32 && defined __PPC64__
++  /* This code partly duplicates the HAVE_PERSONALITY_LINUX32 code
++     below.  This duplication is planned to be fixed in a later
++     Emacs release.  */
++# define ADD_NO_RANDOMIZE 0x0040000
++  int pers = personality (0xffffffff);
++  if (! (pers & ADD_NO_RANDOMIZE)
++      && 0 <= personality (pers | ADD_NO_RANDOMIZE))
++    {
++      /* Address randomization was enabled, but is now disabled.
++	 Re-execute Emacs to get a clean slate.  */
++      execvp (argv[0], argv);
++
++      /* If the exec fails, warn the user and then try without a
++	 clean slate.  */
++      perror (argv[0]);
++    }
++# undef ADD_NO_RANDOMIZE
++#endif
++
+ #ifndef CANNOT_DUMP
+   might_dump = !initialized;
+ #endif
+@@ -784,7 +804,7 @@ main (int argc, char **argv)
+   dumping = !initialized && (strcmp (argv[argc - 1], "dump") == 0
+ 			     || strcmp (argv[argc - 1], "bootstrap") == 0);
+ 
+-#ifdef HAVE_PERSONALITY_LINUX32
++#if defined HAVE_PERSONALITY_LINUX32 && !defined __PPC64__
+   if (dumping && ! getenv ("EMACS_HEAP_EXEC"))
+     {
+       /* Set this so we only do this once.  */
+@@ -801,7 +821,7 @@ main (int argc, char **argv)
+       /* If the exec fails, try to dump anyway.  */
+       emacs_perror (argv[0]);
+     }
+-#endif /* HAVE_PERSONALITY_LINUX32 */
++#endif
+ 
+ #if defined (HAVE_SETRLIMIT) && defined (RLIMIT_STACK) && !defined (CYGWIN)
+   /* Extend the stack space available.  Don't do that if dumping,

emacs.spec

@@ -5,7 +5,7 @@ Summary:       GNU Emacs text editor
 Name:          emacs
 Epoch:         1
 Version:       25.0.95
-Release:       3%{?dist}
+Release:       4%{?dist}
 License:       GPLv3+ and CC0-1.0
 URL:           http://www.gnu.org/software/emacs/
 Group:         Applications/Editors
@@ -25,6 +25,7 @@ Patch1:        emacs-spellchecker.patch
 # Fix for default PDF viewer bug #971162
 Patch2:        emacs-pdf-default.patch
 Patch3:        emacs-system-crypto-policies.patch
+Patch4:        emacs-ppc64.patch
 
 BuildRequires: atk-devel
 BuildRequires: cairo-devel
@@ -69,7 +70,7 @@ BuildRequires: webkitgtk3-devel
 BuildRequires: python2-devel
 BuildRequires: python3-devel
 
-%ifarch %{ix86} %{power64}
+%ifarch %{ix86}
 BuildRequires: util-linux
 %endif
 
@@ -167,6 +168,7 @@ packages that add functionality to Emacs.
 %patch1 -p1 -b .spellchecker
 %patch2 -p1 -b .pdf-default.patch
 %patch3 -p1 -b .system-crypto-policies
+%patch4 -p1 -b .ppc64
 autoconf
 
 # We prefer our emacs.desktop file
@@ -220,12 +222,7 @@ LDFLAGS=-Wl,-z,relro;  export LDFLAGS;
 %configure --with-dbus --with-gif --with-jpeg --with-png --with-rsvg \
            --with-tiff --with-xft --with-xpm --with-x-toolkit=gtk3 --with-gpm=no \
            --with-xwidgets
-%ifarch %{power64}
-  # Temporary workaround for #1356919. Remove when Emacs has been fixed properly.
-  setarch %{_arch} -R make bootstrap
-%else
-  make bootstrap
-%endif
+make bootstrap
 %{setarch} make %{?_smp_mflags}
 cd ..
 
@@ -451,6 +448,9 @@ update-desktop-database &> /dev/null || :
 %dir %{_datadir}/emacs/site-lisp/site-start.d
 
 %changelog
+* Fri Jul 22 2016 Jan Synáček <jsynacek@redhat.com> - 1:25.0.95-4
+- fix: emacs build failure due to high memory consumption on ppc64 (#1356919)
+
 * Mon Jul 18 2016 Jan Synáček <jsynacek@redhat.com> - 1:25.0.95-3
 - workaround: emacs build failure due to high memory consumption on ppc64 (#1356919)
   (patch provided by Sinny Kumari)