* Work around PR c++/65913, link with -latomic when linking with -stdc++.

    Closes: #797577.


git-svn-id: svn://anonscm.debian.org/gcccvs/branches/sid/gcc-5@8227 6ca36cf4-e1d1-0310-8c6f-e303bb2178ca

4 files changed, 73 insertions, 0 deletions

diff --git a/debian/changelog b/debian/changelog
index 38466d5..579d6f2 100644
--- a/debian/changelog
+++ b/debian/changelog
@@ -1,6 +1,8 @@
 gcc-5 (5.2.1-18) UNRELEASED; urgency=medium
 
   * gcc-5-plugin-dev: Depend on libmpc-dev. Closes: #798997.
+  * Work around PR c++/65913, link with -latomic when linking with -stdc++.
+    Closes: #797577.
 
  -- Matthias Klose <doko@debian.org>  Tue, 15 Sep 2015 08:38:50 +0200
 
diff --git a/debian/patches/pr65913-workaround-old.diff b/debian/patches/pr65913-workaround-old.diff
new file mode 100644
index 0000000..fca82ff
--- /dev/null
+++ b/debian/patches/pr65913-workaround-old.diff
@@ -0,0 +1,31 @@
+# DP: Work around PR c++/65913, link with -latomic (older than binutils 2.25)
+
+--- a/src/gcc/cp/g++spec.c
++++ b/src/gcc/cp/g++spec.c
+@@ -264,6 +264,8 @@
+ 
+   /* Add one for shared_libgcc or extra static library.  */
+   num_args = argc + added + need_math + (library > 0) * 4 + 1;
++  /* Link libatomic.  */
++  num_args += 2;
+   new_decoded_options = XNEWVEC (struct cl_decoded_option, num_args);
+ 
+   i = 0;
+@@ -389,6 +391,17 @@
+   if (shared_libgcc && !static_link)
+     generate_option (OPT_shared_libgcc, NULL, 1, CL_DRIVER,
+ 		     &new_decoded_options[j++]);
++  if (library > 0)
++    {
++      /* Work around http://gcc.gnu.org/PR65913.  */
++      generate_option (OPT_Wl_, "--as-needed", 1, CL_DRIVER,
++		       &new_decoded_options[j]);
++      j++;
++      generate_option (OPT_l, "atomic", 1, CL_DRIVER,
++		       &new_decoded_options[j]);
++      added_libraries++;
++      j++;
++    }
+ 
+   *in_decoded_options_count = j;
+   *in_decoded_options = new_decoded_options;
diff --git a/debian/patches/pr65913-workaround.diff b/debian/patches/pr65913-workaround.diff
new file mode 100644
index 0000000..dfa8efc
--- /dev/null
+++ b/debian/patches/pr65913-workaround.diff
@@ -0,0 +1,34 @@
+# DP: Work around PR c++/65913, link with -latomic
+
+--- a/src/gcc/cp/g++spec.c
++++ b/src/gcc/cp/g++spec.c
+@@ -264,6 +264,8 @@
+ 
+   /* Add one for shared_libgcc or extra static library.  */
+   num_args = argc + added + need_math + (library > 0) * 4 + 1;
++  /* Link libatomic.  */
++  num_args += 4;
+   new_decoded_options = XNEWVEC (struct cl_decoded_option, num_args);
+ 
+   i = 0;
+@@ -364,6 +366,20 @@
+ 	  j++;
+ 	}
+ #endif
++      /* Work around http://gcc.gnu.org/PR65913.  */
++      generate_option (OPT_Wl_, "--push-state", 1, CL_DRIVER,
++		       &new_decoded_options[j]);
++      j++;
++      generate_option (OPT_Wl_, "--as-needed", 1, CL_DRIVER,
++		       &new_decoded_options[j]);
++      j++;
++      generate_option (OPT_l, "atomic", 1, CL_DRIVER,
++		       &new_decoded_options[j]);
++      added_libraries++;
++      j++;
++      generate_option (OPT_Wl_, "--pop-state", 1, CL_DRIVER,
++		       &new_decoded_options[j]);
++      j++;
+     }
+   if (saw_math)
+     new_decoded_options[j++] = *saw_math;
diff --git a/debian/rules.patch b/debian/rules.patch
index d147709..03294a2 100644
--- a/debian/rules.patch
+++ b/debian/rules.patch
@@ -91,6 +91,12 @@ debian_patches += \
 	pr67508 \
 	pr67143 \
 
+ifneq (,$(filter $(distrelease),squeeze wheezy dapper lucid precise quantal raring saucy trusty))
+  debian_patches += pr65913-workaround-old
+else
+  debian_patches += pr65913-workaround
+endif
+
 ifeq ($(libstdcxx_abi),new)
   debian_patches += libstdc++-functexcept
 endif