* testsuite/Makefile.am: Add incremental_copy_test,

	incremental_common_test_1.
	* testsuite/Makefile.in: Regenerate.
	* testsuite/common_test_1_v1.c: New source file.
	* testsuite/common_test_1_v2.c: New source file.
	* testsuite/copy_test_v1.cc: New source file.

5 files changed, 276 insertions, 3 deletions

diff --git a/gold/testsuite/Makefile.am b/gold/testsuite/Makefile.am
index a068fa7a51..8a05ac8090 100644
--- a/gold/testsuite/Makefile.am
+++ b/gold/testsuite/Makefile.am
@@ -1851,6 +1851,22 @@ incremental_test_4: two_file_test_1.o two_file_test_1b.o two_file_test_2_v1.o \
 	cp -f two_file_test_2.o two_file_test_tmp_4.o
 	$(CXXLINK) -Wl,--incremental-update,--incremental-base=incremental_test_4.base -Bgcctestdir/ two_file_test_1.o two_file_test_1b.o two_file_test_tmp_4.o two_file_test_main.o
 
+check_PROGRAMS += incremental_copy_test
+incremental_copy_test: copy_test_v1.o copy_test.o copy_test_1.so copy_test_2.so
+	cp -f copy_test_v1.o copy_test_tmp.o
+	$(CXXLINK) -Wl,--incremental-full -Bgcctestdir/ -Wl,-R,. copy_test_tmp.o copy_test_1.so copy_test_2.so
+	@sleep 1
+	cp -f copy_test.o copy_test_tmp.o
+	$(CXXLINK) -Wl,--incremental-update -Bgcctestdir/ -Wl,-R,. copy_test_tmp.o copy_test_1.so copy_test_2.so
+
+check_PROGRAMS += incremental_common_test_1
+incremental_common_test_1: common_test_1_v1.o common_test_1_v2.o gcctestdir/ld
+	cp -f common_test_1_v1.o common_test_1_tmp.o
+	$(CXXLINK) -Wl,--incremental-full -Bgcctestdir/ common_test_1_tmp.o
+	@sleep 1
+	cp -f common_test_1_v2.o common_test_1_tmp.o
+	$(CXXLINK) -Wl,--incremental-update -Bgcctestdir/ common_test_1_tmp.o
+
 endif DEFAULT_TARGET_X86_64
 
 endif GCC
diff --git a/gold/testsuite/Makefile.in b/gold/testsuite/Makefile.in
index c4b2ea03f5..f8836d5e26 100644
--- a/gold/testsuite/Makefile.in
+++ b/gold/testsuite/Makefile.in
@@ -435,7 +435,9 @@ check_PROGRAMS = $(am__EXEEXT_1) $(am__EXEEXT_2) $(am__EXEEXT_3) \
 # Incremental linking is currently supported only on the x86_64 target.
 @DEFAULT_TARGET_X86_64_TRUE@@GCC_TRUE@@NATIVE_LINKER_TRUE@am__append_35 = incremental_test_2 \
 @DEFAULT_TARGET_X86_64_TRUE@@GCC_TRUE@@NATIVE_LINKER_TRUE@	incremental_test_3 \
-@DEFAULT_TARGET_X86_64_TRUE@@GCC_TRUE@@NATIVE_LINKER_TRUE@	incremental_test_4
+@DEFAULT_TARGET_X86_64_TRUE@@GCC_TRUE@@NATIVE_LINKER_TRUE@	incremental_test_4 \
+@DEFAULT_TARGET_X86_64_TRUE@@GCC_TRUE@@NATIVE_LINKER_TRUE@	incremental_copy_test \
+@DEFAULT_TARGET_X86_64_TRUE@@GCC_TRUE@@NATIVE_LINKER_TRUE@	incremental_common_test_1
 @DEFAULT_TARGET_X86_64_TRUE@@GCC_TRUE@@NATIVE_LINKER_TRUE@am__append_36 = two_file_test_tmp_2.o \
 @DEFAULT_TARGET_X86_64_TRUE@@GCC_TRUE@@NATIVE_LINKER_TRUE@	two_file_test_tmp_3.o \
 @DEFAULT_TARGET_X86_64_TRUE@@GCC_TRUE@@NATIVE_LINKER_TRUE@	incremental_test_4.base \
@@ -683,7 +685,9 @@ libgoldtest_a_OBJECTS = $(am_libgoldtest_a_OBJECTS)
 @GCC_TRUE@@NATIVE_LINKER_TRUE@am__EXEEXT_22 = start_lib_test$(EXEEXT)
 @DEFAULT_TARGET_X86_64_TRUE@@GCC_TRUE@@NATIVE_LINKER_TRUE@am__EXEEXT_23 = incremental_test_2$(EXEEXT) \
 @DEFAULT_TARGET_X86_64_TRUE@@GCC_TRUE@@NATIVE_LINKER_TRUE@	incremental_test_3$(EXEEXT) \
-@DEFAULT_TARGET_X86_64_TRUE@@GCC_TRUE@@NATIVE_LINKER_TRUE@	incremental_test_4$(EXEEXT)
+@DEFAULT_TARGET_X86_64_TRUE@@GCC_TRUE@@NATIVE_LINKER_TRUE@	incremental_test_4$(EXEEXT) \
+@DEFAULT_TARGET_X86_64_TRUE@@GCC_TRUE@@NATIVE_LINKER_TRUE@	incremental_copy_test$(EXEEXT) \
+@DEFAULT_TARGET_X86_64_TRUE@@GCC_TRUE@@NATIVE_LINKER_TRUE@	incremental_common_test_1$(EXEEXT)
 basic_pic_test_SOURCES = basic_pic_test.c
 basic_pic_test_OBJECTS = basic_pic_test.$(OBJEXT)
 basic_pic_test_LDADD = $(LDADD)
@@ -1008,6 +1012,19 @@ ifuncmain7pie_DEPENDENCIES = libgoldtest.a ../libgold.a \
 ifuncmain7static_OBJECTS = $(am_ifuncmain7static_OBJECTS)
 ifuncmain7static_LINK = $(CCLD) $(AM_CFLAGS) $(CFLAGS) \
 	$(ifuncmain7static_LDFLAGS) $(LDFLAGS) -o $@
+incremental_common_test_1_SOURCES = incremental_common_test_1.c
+incremental_common_test_1_OBJECTS =  \
+	incremental_common_test_1.$(OBJEXT)
+incremental_common_test_1_LDADD = $(LDADD)
+incremental_common_test_1_DEPENDENCIES = libgoldtest.a ../libgold.a \
+	../../libiberty/libiberty.a $(am__DEPENDENCIES_1) \
+	$(am__DEPENDENCIES_1) $(am__DEPENDENCIES_1)
+incremental_copy_test_SOURCES = incremental_copy_test.c
+incremental_copy_test_OBJECTS = incremental_copy_test.$(OBJEXT)
+incremental_copy_test_LDADD = $(LDADD)
+incremental_copy_test_DEPENDENCIES = libgoldtest.a ../libgold.a \
+	../../libiberty/libiberty.a $(am__DEPENDENCIES_1) \
+	$(am__DEPENDENCIES_1) $(am__DEPENDENCIES_1)
 incremental_test_2_SOURCES = incremental_test_2.c
 incremental_test_2_OBJECTS = incremental_test_2.$(OBJEXT)
 incremental_test_2_LDADD = $(LDADD)
@@ -1504,7 +1521,8 @@ SOURCES = $(libgoldtest_a_SOURCES) basic_pic_test.c basic_pie_test.c \
 	$(ifuncmain5static_SOURCES) ifuncmain5staticpic.c \
 	ifuncmain6pie.c $(ifuncmain7_SOURCES) ifuncmain7pic.c \
 	ifuncmain7picstatic.c ifuncmain7pie.c \
-	$(ifuncmain7static_SOURCES) incremental_test_2.c \
+	$(ifuncmain7static_SOURCES) incremental_common_test_1.c \
+	incremental_copy_test.c incremental_test_2.c \
 	incremental_test_3.c incremental_test_4.c $(initpri1_SOURCES) \
 	$(justsyms_SOURCES) $(large_SOURCES) local_labels_test.c \
 	many_sections_r_test.c $(many_sections_test_SOURCES) \
@@ -2577,6 +2595,24 @@ ifuncmain7$(EXEEXT): $(ifuncmain7_OBJECTS) $(ifuncmain7_DEPENDENCIES)
 ifuncmain7static$(EXEEXT): $(ifuncmain7static_OBJECTS) $(ifuncmain7static_DEPENDENCIES) 
 	@rm -f ifuncmain7static$(EXEEXT)
 	$(ifuncmain7static_LINK) $(ifuncmain7static_OBJECTS) $(ifuncmain7static_LDADD) $(LIBS)
+@DEFAULT_TARGET_X86_64_FALSE@incremental_common_test_1$(EXEEXT): $(incremental_common_test_1_OBJECTS) $(incremental_common_test_1_DEPENDENCIES) 
+@DEFAULT_TARGET_X86_64_FALSE@	@rm -f incremental_common_test_1$(EXEEXT)
+@DEFAULT_TARGET_X86_64_FALSE@	$(LINK) $(incremental_common_test_1_OBJECTS) $(incremental_common_test_1_LDADD) $(LIBS)
+@GCC_FALSE@incremental_common_test_1$(EXEEXT): $(incremental_common_test_1_OBJECTS) $(incremental_common_test_1_DEPENDENCIES) 
+@GCC_FALSE@	@rm -f incremental_common_test_1$(EXEEXT)
+@GCC_FALSE@	$(LINK) $(incremental_common_test_1_OBJECTS) $(incremental_common_test_1_LDADD) $(LIBS)
+@NATIVE_LINKER_FALSE@incremental_common_test_1$(EXEEXT): $(incremental_common_test_1_OBJECTS) $(incremental_common_test_1_DEPENDENCIES) 
+@NATIVE_LINKER_FALSE@	@rm -f incremental_common_test_1$(EXEEXT)
+@NATIVE_LINKER_FALSE@	$(LINK) $(incremental_common_test_1_OBJECTS) $(incremental_common_test_1_LDADD) $(LIBS)
+@DEFAULT_TARGET_X86_64_FALSE@incremental_copy_test$(EXEEXT): $(incremental_copy_test_OBJECTS) $(incremental_copy_test_DEPENDENCIES) 
+@DEFAULT_TARGET_X86_64_FALSE@	@rm -f incremental_copy_test$(EXEEXT)
+@DEFAULT_TARGET_X86_64_FALSE@	$(LINK) $(incremental_copy_test_OBJECTS) $(incremental_copy_test_LDADD) $(LIBS)
+@GCC_FALSE@incremental_copy_test$(EXEEXT): $(incremental_copy_test_OBJECTS) $(incremental_copy_test_DEPENDENCIES) 
+@GCC_FALSE@	@rm -f incremental_copy_test$(EXEEXT)
+@GCC_FALSE@	$(LINK) $(incremental_copy_test_OBJECTS) $(incremental_copy_test_LDADD) $(LIBS)
+@NATIVE_LINKER_FALSE@incremental_copy_test$(EXEEXT): $(incremental_copy_test_OBJECTS) $(incremental_copy_test_DEPENDENCIES) 
+@NATIVE_LINKER_FALSE@	@rm -f incremental_copy_test$(EXEEXT)
+@NATIVE_LINKER_FALSE@	$(LINK) $(incremental_copy_test_OBJECTS) $(incremental_copy_test_LDADD) $(LIBS)
 @DEFAULT_TARGET_X86_64_FALSE@incremental_test_2$(EXEEXT): $(incremental_test_2_OBJECTS) $(incremental_test_2_DEPENDENCIES) 
 @DEFAULT_TARGET_X86_64_FALSE@	@rm -f incremental_test_2$(EXEEXT)
 @DEFAULT_TARGET_X86_64_FALSE@	$(LINK) $(incremental_test_2_OBJECTS) $(incremental_test_2_LDADD) $(LIBS)
@@ -2971,6 +3007,8 @@ distclean-compile:
 @AMDEP_TRUE@@am__include@ @am__quote@./$(DEPDIR)/ifuncmain7pic.Po@am__quote@
 @AMDEP_TRUE@@am__include@ @am__quote@./$(DEPDIR)/ifuncmain7picstatic.Po@am__quote@
 @AMDEP_TRUE@@am__include@ @am__quote@./$(DEPDIR)/ifuncmain7pie.Po@am__quote@
+@AMDEP_TRUE@@am__include@ @am__quote@./$(DEPDIR)/incremental_common_test_1.Po@am__quote@
+@AMDEP_TRUE@@am__include@ @am__quote@./$(DEPDIR)/incremental_copy_test.Po@am__quote@
 @AMDEP_TRUE@@am__include@ @am__quote@./$(DEPDIR)/incremental_test_2.Po@am__quote@
 @AMDEP_TRUE@@am__include@ @am__quote@./$(DEPDIR)/incremental_test_3.Po@am__quote@
 @AMDEP_TRUE@@am__include@ @am__quote@./$(DEPDIR)/incremental_test_4.Po@am__quote@
@@ -3652,6 +3690,10 @@ incremental_test_3.log: incremental_test_3$(EXEEXT)
 	@p='incremental_test_3$(EXEEXT)'; $(am__check_pre) $(LOG_COMPILE) "$$tst" $(am__check_post)
 incremental_test_4.log: incremental_test_4$(EXEEXT)
 	@p='incremental_test_4$(EXEEXT)'; $(am__check_pre) $(LOG_COMPILE) "$$tst" $(am__check_post)
+incremental_copy_test.log: incremental_copy_test$(EXEEXT)
+	@p='incremental_copy_test$(EXEEXT)'; $(am__check_pre) $(LOG_COMPILE) "$$tst" $(am__check_post)
+incremental_common_test_1.log: incremental_common_test_1$(EXEEXT)
+	@p='incremental_common_test_1$(EXEEXT)'; $(am__check_pre) $(LOG_COMPILE) "$$tst" $(am__check_post)
 .test.log:
 	@p='$<'; $(am__check_pre) $(TEST_LOG_COMPILE) "$$tst" $(am__check_post)
 @am__EXEEXT_TRUE@.test$(EXEEXT).log:
@@ -4615,6 +4657,18 @@ uninstall-am:
 @DEFAULT_TARGET_X86_64_TRUE@@GCC_TRUE@@NATIVE_LINKER_TRUE@	@sleep 1
 @DEFAULT_TARGET_X86_64_TRUE@@GCC_TRUE@@NATIVE_LINKER_TRUE@	cp -f two_file_test_2.o two_file_test_tmp_4.o
 @DEFAULT_TARGET_X86_64_TRUE@@GCC_TRUE@@NATIVE_LINKER_TRUE@	$(CXXLINK) -Wl,--incremental-update,--incremental-base=incremental_test_4.base -Bgcctestdir/ two_file_test_1.o two_file_test_1b.o two_file_test_tmp_4.o two_file_test_main.o
+@DEFAULT_TARGET_X86_64_TRUE@@GCC_TRUE@@NATIVE_LINKER_TRUE@incremental_copy_test: copy_test_v1.o copy_test.o copy_test_1.so copy_test_2.so
+@DEFAULT_TARGET_X86_64_TRUE@@GCC_TRUE@@NATIVE_LINKER_TRUE@	cp -f copy_test_v1.o copy_test_tmp.o
+@DEFAULT_TARGET_X86_64_TRUE@@GCC_TRUE@@NATIVE_LINKER_TRUE@	$(CXXLINK) -Wl,--incremental-full -Bgcctestdir/ -Wl,-R,. copy_test_tmp.o copy_test_1.so copy_test_2.so
+@DEFAULT_TARGET_X86_64_TRUE@@GCC_TRUE@@NATIVE_LINKER_TRUE@	@sleep 1
+@DEFAULT_TARGET_X86_64_TRUE@@GCC_TRUE@@NATIVE_LINKER_TRUE@	cp -f copy_test.o copy_test_tmp.o
+@DEFAULT_TARGET_X86_64_TRUE@@GCC_TRUE@@NATIVE_LINKER_TRUE@	$(CXXLINK) -Wl,--incremental-update -Bgcctestdir/ -Wl,-R,. copy_test_tmp.o copy_test_1.so copy_test_2.so
+@DEFAULT_TARGET_X86_64_TRUE@@GCC_TRUE@@NATIVE_LINKER_TRUE@incremental_common_test_1: common_test_1_v1.o common_test_1_v2.o gcctestdir/ld
+@DEFAULT_TARGET_X86_64_TRUE@@GCC_TRUE@@NATIVE_LINKER_TRUE@	cp -f common_test_1_v1.o common_test_1_tmp.o
+@DEFAULT_TARGET_X86_64_TRUE@@GCC_TRUE@@NATIVE_LINKER_TRUE@	$(CXXLINK) -Wl,--incremental-full -Bgcctestdir/ common_test_1_tmp.o
+@DEFAULT_TARGET_X86_64_TRUE@@GCC_TRUE@@NATIVE_LINKER_TRUE@	@sleep 1
+@DEFAULT_TARGET_X86_64_TRUE@@GCC_TRUE@@NATIVE_LINKER_TRUE@	cp -f common_test_1_v2.o common_test_1_tmp.o
+@DEFAULT_TARGET_X86_64_TRUE@@GCC_TRUE@@NATIVE_LINKER_TRUE@	$(CXXLINK) -Wl,--incremental-update -Bgcctestdir/ common_test_1_tmp.o
 @NATIVE_OR_CROSS_LINKER_TRUE@script_test_10.o: script_test_10.s
 @NATIVE_OR_CROSS_LINKER_TRUE@	$(TEST_AS) -o $@ $<
 @NATIVE_OR_CROSS_LINKER_TRUE@script_test_10: $(srcdir)/script_test_10.t script_test_10.o gcctestdir/ld
diff --git a/gold/testsuite/common_test_1_v1.c b/gold/testsuite/common_test_1_v1.c
new file mode 100644
index 0000000000..86abc402e2
--- /dev/null
+++ b/gold/testsuite/common_test_1_v1.c
@@ -0,0 +1,79 @@
+/* common_test_1_v1.c -- test common symbol sorting
+
+   Copyright 2008, 2011 Free Software Foundation, Inc.
+   Written by Ian Lance Taylor <iant@google.com>
+
+   This file is part of gold.
+
+   This program is free software; you can redistribute it and/or modify
+   it under the terms of the GNU General Public License as published by
+   the Free Software Foundation; either version 3 of the License, or
+   (at your option) any later version.
+
+   This program is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+   GNU General Public License for more details.
+
+   You should have received a copy of the GNU General Public License
+   along with this program; if not, write to the Free Software
+   Foundation, Inc., 51 Franklin Street - Fifth Floor, Boston,
+   MA 02110-1301, USA.
+
+   This is a test of a common symbol in the main program and a
+   versioned symbol in a shared library.  The common symbol in the
+   main program should override the shared library symbol.
+
+   This file is a modified version of the real test case, to be used
+   while testing the --incremental option.  */
+
+#include <assert.h>
+
+/* Common symbols should be sorted by size, largest first, and then by
+   alignment, largest first.  We mix up the names, because gas seems
+   to sort common symbols roughly by name.  */
+
+int c9[90];
+int c8[80];
+int c7[70];
+int c6[60];
+int c5[10];
+int c4[20];
+int c3[30];
+int c2[40];
+int c1[50];
+
+int a1 __attribute__ ((aligned (1 << 9)));
+int a2 __attribute__ ((aligned (1 << 8)));
+int a3 __attribute__ ((aligned (1 << 7)));
+int a4 __attribute__ ((aligned (1 << 6)));
+int a5 __attribute__ ((aligned (1 << 1)));
+int a6 __attribute__ ((aligned (1 << 2)));
+int a7 __attribute__ ((aligned (1 << 3)));
+int a8 __attribute__ ((aligned (1 << 4)));
+int a9 __attribute__ ((aligned (1 << 5)));
+
+int
+main (int argc __attribute__ ((unused)), char** argv __attribute__ ((unused)))
+{
+  /* These tests are deliberately incorrect.  */
+  assert (c5 < c4);
+  assert (c4 < c3);
+  assert (c3 < c2);
+  assert (c2 < c1);
+  assert (c1 < c6);
+  assert (c6 < c7);
+  assert (c7 < c8);
+  assert (c8 < c9);
+
+  assert (&a1 > &a2);
+  assert (&a2 > &a3);
+  assert (&a3 > &a4);
+  assert (&a4 > &a9);
+  assert (&a9 > &a8);
+  assert (&a8 > &a7);
+  assert (&a7 > &a6);
+  assert (&a6 > &a5);
+
+  return 0;
+}
diff --git a/gold/testsuite/common_test_1_v2.c b/gold/testsuite/common_test_1_v2.c
new file mode 100644
index 0000000000..c66a647bb8
--- /dev/null
+++ b/gold/testsuite/common_test_1_v2.c
@@ -0,0 +1,77 @@
+/* common_test_1_v2.c -- test common symbol sorting
+
+   Copyright 2008 Free Software Foundation, Inc.
+   Written by Ian Lance Taylor <iant@google.com>
+
+   This file is part of gold.
+
+   This program is free software; you can redistribute it and/or modify
+   it under the terms of the GNU General Public License as published by
+   the Free Software Foundation; either version 3 of the License, or
+   (at your option) any later version.
+
+   This program is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+   GNU General Public License for more details.
+
+   You should have received a copy of the GNU General Public License
+   along with this program; if not, write to the Free Software
+   Foundation, Inc., 51 Franklin Street - Fifth Floor, Boston,
+   MA 02110-1301, USA.
+
+   This is a test of a common symbol in the main program and a
+   versioned symbol in a shared library.  The common symbol in the
+   main program should override the shared library symbol.  */
+
+#include <assert.h>
+
+/* Common symbols should be sorted by size, largest first, and then by
+   alignment, largest first.  We mix up the names, because gas seems
+   to sort common symbols roughly by name.  */
+
+int c9[90];
+int c8[80];
+int c7[70];
+int c6[60];
+int c5[10];
+int c4[20];
+int c3[30];
+int c2[40];
+int c1[50];
+
+int a1 __attribute__ ((aligned (1 << 9)));
+int a2 __attribute__ ((aligned (1 << 8)));
+int a3 __attribute__ ((aligned (1 << 7)));
+int a4 __attribute__ ((aligned (1 << 6)));
+int a5 __attribute__ ((aligned (1 << 1)));
+int a6 __attribute__ ((aligned (1 << 2)));
+int a7 __attribute__ ((aligned (1 << 3)));
+int a8 __attribute__ ((aligned (1 << 4)));
+int a9 __attribute__ ((aligned (1 << 5)));
+
+int
+main (int argc __attribute__ ((unused)), char** argv __attribute__ ((unused)))
+{
+  // After an incremental update, all guarantees about ordering
+  // are null.
+  assert (c5 != c4);
+  assert (c4 != c3);
+  assert (c3 != c2);
+  assert (c2 != c1);
+  assert (c1 != c6);
+  assert (c6 != c7);
+  assert (c7 != c8);
+  assert (c8 != c9);
+
+  assert (&a1 != &a2);
+  assert (&a2 != &a3);
+  assert (&a3 != &a4);
+  assert (&a4 != &a9);
+  assert (&a9 != &a8);
+  assert (&a8 != &a7);
+  assert (&a7 != &a6);
+  assert (&a6 != &a5);
+
+  return 0;
+}
diff --git a/gold/testsuite/copy_test_v1.cc b/gold/testsuite/copy_test_v1.cc
new file mode 100644
index 0000000000..63f7dfd5fd
--- /dev/null
+++ b/gold/testsuite/copy_test_v1.cc
@@ -0,0 +1,47 @@
+// copy_test_v1.cc -- test copy relocs for gold
+
+// Copyright 2008, 2011 Free Software Foundation, Inc.
+// Written by Ian Lance Taylor <iant@google.com>.
+
+// This file is part of gold.
+
+// This program is free software; you can redistribute it and/or modify
+// it under the terms of the GNU General Public License as published by
+// the Free Software Foundation; either version 3 of the License, or
+// (at your option) any later version.
+
+// This program is distributed in the hope that it will be useful,
+// but WITHOUT ANY WARRANTY; without even the implied warranty of
+// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+// GNU General Public License for more details.
+
+// You should have received a copy of the GNU General Public License
+// along with this program; if not, write to the Free Software
+// Foundation, Inc., 51 Franklin Street - Fifth Floor, Boston,
+// MA 02110-1301, USA.
+
+// This source file is used for testing the --incremental option.
+// The object built from this source will be incrementally updated
+// with the correct object built from copy_test.cc.
+
+#include <cassert>
+#include <stdint.h>
+
+// Misalign the BSS section.
+static char c;
+
+// From copy_test_1.cc.
+extern char b;
+
+// From copy_test_2.cc.
+extern long long l;
+
+int
+main()
+{
+  assert(c == 0);
+  assert(b == 1);
+  assert(l == 3);	// Deliberately incorrect.
+  assert((reinterpret_cast<uintptr_t>(&l) & 0x7) == 0);
+  return 0;
+}