turn off executable stack flag in executables (#973512)

- reported by Dhiru Kholia
- upstream patch by Edward Zhang:
  see http://ghc.haskell.org/trac/ghc/ticket/703 and
  08a38628f2
- this affects both ghc 7.4 and 7.6

ghc-NCG-no-execstack.patch

@@ -0,0 +1,32 @@
+commit 08a38628f29df63ac842f4d083efb414f42d7bff
+Author: Edward Z. Yang <ezyang@mit.edu>
+Date:   Tue Jul 9 00:01:43 2013 -0700
+
+    Disable executable stack for the linker note, fixing #703 (again)
+    
+    Signed-off-by: Edward Z. Yang <ezyang@mit.edu>
+
+	Modified   compiler/main/DriverPipeline.hs
+diff --git a/compiler/main/DriverPipeline.hs b/compiler/main/DriverPipeline.hs
+index 67377e6..26425ae 100644
+--- a/compiler/main/DriverPipeline.hs
++++ b/compiler/main/DriverPipeline.hs
+@@ -1640,7 +1640,17 @@ mkNoteObjsToLinkIntoBinary dflags dep_packages = do
+                                    text elfSectionNote,
+                                    text "\n",
+ 
+-          text "\t.ascii \"", info', text "\"\n" ]
++          text "\t.ascii \"", info', text "\"\n",
++
++          -- ALL generated assembly must have this section to disable
++          -- executable stacks.  See also
++          -- compiler/nativeGen/AsmCodeGen.lhs for another instance
++          -- where we need to do this.
++          (if platformHasGnuNonexecStack (targetPlatform dflags)
++           then text ".section .note.GNU-stack,\"\",@progbits\n"
++           else empty)
++
++           ]
+           where
+             info' = text $ escape info
+ 

ghc.spec

@@ -29,7 +29,7 @@ Version: 7.6.3
 # - release can only be reset if *all* library versions get bumped simultaneously
 #   (sometimes after a major release)
 # - minor release numbers for a branch should be incremented monotonically
-Release: 14%{?dist}
+Release: 15%{?dist}
 Summary: Glasgow Haskell Compiler
 
 License: %BSDHaskellReport
@@ -52,6 +52,8 @@ Patch10: ghc-wrapper-libffi-include.patch
 Patch12: ghc-7.4.2-Cabal-disable-ghci-libs.patch
 # fix compilation with llvm-3.3
 Patch13: ghc-llvmCodeGen-empty-array.patch
+# disable executable stack
+Patch14: ghc-NCG-no-execstack.patch
 
 # fedora ghc has been bootstrapped on
 # %{ix86} x86_64 ppc alpha sparcv9 ppc64 armv7hl armv5tel s390 s390x
@@ -224,8 +226,8 @@ ln -s $(pkg-config --variable=includedir libffi)/*.h rts/dist/build
 %endif
 
 %patch12 -p1 -b .orig
-
 %patch13 -p1 -b .orig
+%patch14 -p1 -b .orig
 
 
 %build
@@ -439,6 +441,10 @@ fi
 
 
 %changelog
+* Wed Jul 10 2013 Jens Petersen <petersen@redhat.com> - 7.6.3-15
+- turn off executable stack flag in executables (#973512)
+  (thanks Edward Zhang for upstream patch and Dhiru Kholia for report)
+
 * Tue Jun 25 2013 Jens Petersen <petersen@redhat.com> - 7.6.3-14
 - fix compilation with llvm-3.3 (#977652)
   see http://hackage.haskell.org/trac/ghc/ticket/7996
@@ -453,8 +459,7 @@ fi
 * Thu Jun 20 2013 Jens Petersen <petersen@redhat.com> - 7.6.3-12
 - bootstrap 7.6.3
 - all library versions bumped except pretty
-- Cabal-fix-dynamic-exec-for-TH.patch,
-  ghc-7.4-add-support-for-ARM-hard-float-ABI-fixes-5914.patch, and
+- ghc-7.4-add-support-for-ARM-hard-float-ABI-fixes-5914.patch, and
   ghc-7.4-silence-gen_contents_index.patch are no longer needed
 - build with ghc-rpm-macros-extra
 - no longer filter type-level package from haddock index