Do not generate notes when there is no output file.

Resolves: #1523875

annobin-empty-input-filename.patch

@@ -11,7 +11,7 @@ diff -rup annobin.orig/plugin/annobin.cc annobin-2.5.1/plugin/annobin.cc
 +    {
 +      /* The name can be empty if we are receiving the source code
 +	 from a pipe.  In this case, we invent our own name.  */
-+      name = "piped_input";
++      name = (char *) "piped_input";
 +    }
 +
    if (global_file_name_symbols)

annobin-lto-filename.patch

@@ -0,0 +1,60 @@
+--- annobin.orig/plugin/annobin.cc	2017-12-11 10:25:28.034276686 +0000
++++ annobin-2.5.1/plugin/annobin.cc	2017-12-11 10:26:40.964423113 +0000
+@@ -179,6 +179,9 @@ annobin_output_note (const void * name,
+ {
+   unsigned i;
+ 
++  if (asm_out_file == NULL)
++    return;
++
+   if (type == NT_GNU_BUILD_ATTRIBUTE_FUNC
+       || type == NT_GNU_BUILD_ATTRIBUTE_OPEN)
+     {
+@@ -512,6 +515,9 @@ annobin_create_function_notes (void * gc
+   if (! annobin_enable_static_notes)
+     return;
+   
++  if (asm_out_file == NULL)
++    return;
++
+   annobin_target_specific_function_notes ();
+ 
+   if (global_stack_prot_option != flag_stack_protect)
+@@ -592,7 +598,18 @@ annobin_create_global_notes (void * gcc_
+ 
+   if (! annobin_enable_static_notes)
+     return;
+-  
++
++  if (asm_out_file == NULL)
++    {
++      /* This happens during LTO compilation.  Compilation is triggered
++	 before any output file has been opened.  Since we do not have
++	 the file handle we cannot emit any notes.  On the other hand,
++	 the recompilation process will repeat later on with a real
++	 output file and so the notes can be generated then.  */
++      annobin_inform (1, "Output file not available - unable to generate notes");
++      return;
++    }
++
+   /* Record global information.
+      Note - we do this here, rather than in plugin_init() as some
+      information, PIC status or POINTER_SIZE, may not be initialised
+@@ -629,6 +646,7 @@ annobin_create_global_notes (void * gcc_
+       /* We need a filename, so invent one.  */
+       annobin_current_filename = (char *) "unknown_source";
+     }
++
+   if (global_file_name_symbols)
+     fprintf (asm_out_file, ".global %s\n", annobin_current_filename);
+   fprintf (asm_out_file, ".type %s STT_OBJECT\n", annobin_current_filename);
+@@ -718,6 +736,9 @@ annobin_create_loader_notes (void * gcc_
+   if (! annobin_enable_dynamic_notes)
+     return;
+ 
++  if (asm_out_file == NULL)
++    return;
++
+   if (annobin_enable_stack_size_notes && annobin_total_static_stack_usage)
+     {
+       annobin_inform (1, "Recording total static usage of %ld", annobin_total_static_stack_usage);

annobin.spec

@@ -1,7 +1,7 @@
 Name:    annobin
 Summary: Binary annotation plugin for GCC
 Version: 2.5.1
-Release: 4%{?dist}
+Release: 5%{?dist}
 
 License: GPLv3+
 URL:     https://fedoraproject.org/wiki/Toolchain/Watermark
@@ -23,6 +23,11 @@ Patch1: funname.patch
 # Lifetime: Fixed in 2.5.2
 Patch2: annobin-empty-input-filename.patch
 
+# Purpose:  Fixes a bug where compiling with LTO enabled would result in the
+#           plugin being called with no output file handle available.
+# Lifetime: Fixed in 2.5.2
+Patch3: annobin-lto-filename.patch
+
 
 # This is a gcc plugin, hence gcc is required.
 Requires: gcc
@@ -81,7 +86,10 @@ make check
 #---------------------------------------------------------------------------------
 
 %changelog
-* Fri Dec 08 2017 Florian Weimer <fweimer@redhat.com> - 2.5.1-4
+* Mon Dec 11 2017 Nick Clifton <nickc@redhat.com> - 2.5.1-5
+- Do not generate notes when there is no output file.  (#1523875)
+
+* Fri Dec 08 2017 Nick Clifton <nickc@redhat.com> - 2.5.1-4
 - Invent an input filename when reading from a pipe.  (#1523401)
 
 * Thu Nov 30 2017 Florian Weimer <fweimer@redhat.com> - 2.5.1-3