test: allow use of system gmock/gtest libs

Makefile.am

 ## Process this file with automake to produce Makefile.in
 
 # Copyright (c) 2011, Google Inc.
 # All rights reserved.
 #
 # Redistribution and use in source and binary forms, with or without
 # modification, are permitted provided that the following conditions are
 # met:
 #
 #     * Redistributions of source code must retain the above copyright
@@ skipping 95 matching lines @@
 includec_HEADERS = $(top_srcdir)/src/common/*.h
 
 includepdir = $(includedir)/$(PACKAGE)/processor
 includep_HEADERS = $(top_srcdir)/src/processor/*.h
 
 ## pkgconfig files
 pkgconfigdir = $(libdir)/pkgconfig
 pkgconfig_DATA =
 
 ## Common test logic
+if SYSTEM_TEST_LIBS
+TEST_CFLAGS = $(GTEST_CFLAGS) $(GMOCK_CFLAGS)
+TEST_LIBS = $(GTEST_LIBS) -lgtest_main $(GMOCK_LIBS)
+else
 TEST_CFLAGS = \
         -I$(top_srcdir)/src/testing/include \
         -I$(top_srcdir)/src/testing/gtest/include \
         -I$(top_srcdir)/src/testing/gtest \
         -I$(top_srcdir)/src/testing
 TEST_LIBS = src/testing/libtesting.a
+endif
 
 ## Libraries
 check_LIBRARIES =
 noinst_LIBRARIES =
 lib_LIBRARIES =
 bin_PROGRAMS =
 check_PROGRAMS =
 EXTRA_PROGRAMS =
 CLEANFILES =
 
 check_LIBRARIES += src/testing/libtesting.a
 
+if !SYSTEM_TEST_LIBS
 src_testing_libtesting_a_SOURCES = \
         src/testing/gtest/src/gtest-all.cc \
         src/testing/gtest/src/gtest_main.cc \
         src/testing/src/gmock-all.cc
 src_testing_libtesting_a_CPPFLAGS = \
         $(AM_CPPFLAGS) $(TEST_CFLAGS)
+endif
 
 if !DISABLE_PROCESSOR
 lib_LIBRARIES += src/libbreakpad.a
 pkgconfig_DATA += breakpad.pc
 noinst_LIBRARIES += src/third_party/libdisasm/libdisasm.a
 endif
 
 if LINUX_HOST
 lib_LIBRARIES += src/client/linux/libbreakpad_client.a
 pkgconfig_DATA += breakpad-client.pc
@@ skipping 362 matching lines @@
 
 src_client_linux_linux_client_unittest_SOURCES =
 src_client_linux_linux_client_unittest_LDFLAGS = \
         -Wl,-rpath,'$$ORIGIN'
 if ANDROID_HOST
 src_client_linux_linux_client_unittest_LDFLAGS += \
         -llog
 endif
 
 src_client_linux_linux_client_unittest_LDADD = \
-        src/client/linux/linux_client_unittest_shlib
+        src/client/linux/linux_client_unittest_shlib \
+        $(TEST_LIBS)
 
 src_client_linux_linux_client_unittest_DEPENDENCIES = \
         src/client/linux/linux_client_unittest_shlib
 
 if !DISABLE_TOOLS
 src_tools_linux_core2md_core2md_SOURCES = \
         src/tools/linux/core2md/core2md.cc
 
 src_tools_linux_core2md_core2md_LDADD = \
         src/client/linux/libbreakpad_client.a
@@ skipping 764 matching lines @@
         src/tools/windows/converter/ms_symbol_server_converter.h \
         src/tools/windows/converter/ms_symbol_server_converter.vcproj \
         src/tools/windows/dump_syms/dump_syms.cc \
         src/tools/windows/dump_syms/dump_syms.vcproj \
         src/tools/windows/dump_syms/run_regtest.sh \
         src/tools/windows/dump_syms/testdata/dump_syms_regtest.cc \
         src/tools/windows/dump_syms/testdata/dump_syms_regtest.pdb \
         src/tools/windows/dump_syms/testdata/dump_syms_regtest.sym \
         src/tools/windows/symupload/symupload.cc \
         src/tools/windows/symupload/symupload.vcproj