Improves Makefile.am (by Vlad Losev); fixes Makefile and updates README (by Zhanyong Wan).

Makefile.am

@@ -76,8 +76,18 @@ test_gmock_link_test_SOURCES = test/gmock_link_test.cc \
                                test/gmock_link_test.h
 test_gmock_link_test_LDADD = $(GTEST_LIBS) lib/libgmock_main.la
 
+# Tests that fused gmock files compile and work.
+TESTS += test/gmock_fused_test
+check_PROGRAMS += test/gmock_fused_test
+test_gmock_fused_test_SOURCES = fused-src/gmock-gtest-all.cc \
+                                fused-src/gmock_main.cc \
+                                fused-src/gmock/gmock.h \
+                                fused-src/gtest/gtest.h \
+                                test/gmock_test.cc
+test_gmock_fused_test_CPPFLAGS = -I"$(srcdir)/fused-src"
+
 # Google Mock source files that we don't compile directly.
-EXTRA_DIST += \
+GMOCK_SOURCE_INGLUDES = \
   src/gmock.cc \
   src/gmock-cardinalities.cc \
   src/gmock-internal-utils.cc \
@@ -85,6 +95,8 @@ EXTRA_DIST += \
   src/gmock-printers.cc \
   src/gmock-spec-builders.cc
 
+EXTRA_DIST += $(GMOCK_SOURCE_INGLUDES)
+
 # C++ tests that we don't compile using autotools.
 EXTRA_DIST += \
   test/gmock_all_test.cc \
@@ -99,8 +111,7 @@ EXTRA_DIST += \
   test/gmock-more-actions_test.cc \
   test/gmock-nice-strict_test.cc \
   test/gmock-port_test.cc \
-  test/gmock-printers_test.cc \
-  test/gmock_test.cc
+  test/gmock-printers_test.cc
 
 # Python tests, which we don't run using autotools.
 EXTRA_DIST += \
@@ -152,3 +163,30 @@ EXTRA_DIST += \
     msvc/gmock_main.vcproj \
     msvc/gmock-spec-builders_test.vcproj \
     msvc/gmock_test.vcproj
+
+# gmock_test.cc does not really depend on files generated by the
+# fused-gmock-internal rule.  However, gmock_test.o does, and it is
+# important to include test/gmock_test.cc as part of this rule in order to
+# prevent compiling gmock_test.o until all dependent files have been
+# generated.
+$(test_gmock_fused_test_SOURCES): fused-gmock-internal
+
+# TODO(vladl@google.com): Find a way to add Google Tests's sources here.
+fused-gmock-internal: $(pkginclude_HEADERS) $(pkginclude_internal_HEADERS) \
+                      $(lib_libgmock_la_SOURCES) $(GMOCK_SOURCE_INGLUDES) \
+                      $(lib_libgmock_main_la_SOURCES) \
+                      scripts/fuse_gmock_files.py
+	mkdir -p "$(srcdir)/fused-src"
+	chmod -R u+w "$(srcdir)/fused-src"
+	rm -f "$(srcdir)/fused-src/gtest/gtest.h"
+	rm -f "$(srcdir)/fused-src/gmock/gmock.h"
+	rm -f "$(srcdir)/fused-src/gmock-gtest-all.cc"
+	"$(srcdir)/scripts/fuse_gmock_files.py" "$(srcdir)/fused-src"
+	cp -f "$(srcdir)/src/gmock_main.cc" "$(srcdir)/fused-src"
+
+maintainer-clean-local:
+	rm -rf "$(srcdir)/fused-src"
+
+# Death tests may produce core dumps in the build directory. In case
+# this happens, clean them to keep distcleancheck happy.
+CLEANFILES = core