gtest: integrate as git submodule

.gitmodules

@@ -0,0 +1,3 @@
+[submodule "gtest"]
+	path = gtest
+	url = https://github.com/google/googletest.git

Makefile.am

@@ -35,8 +35,12 @@ noinst_HEADERS += \
 	compiler/c++.capnp.h \
 	compiler/test.capnp.h
 
-if GTEST
-AM_CXXFLAGS = -std=gnu++11
+GTEST_LDADD = gtest/googletest/lib/libgtest.la
+gtest/googletest/lib/libgtest.la:
+	make -C gtest/googletest lib/libgtest.la
+GTEST_CPPFLAGS = -I${srcdir}/gtest/googletest/include
+DIST_SUBDIRS = gtest/googletest
+
 check_PROGRAMS += \
 	capn-test
 capn_test_SOURCES = \
@@ -45,7 +49,8 @@ capn_test_SOURCES = \
 	compiler/test.capnp.c \
 	compiler/schema-test.cpp \
 	compiler/schema.capnp.c
-capn_test_CFLAGS = $(GTEST_CFLAGS)
-capn_test_LDADD = libcapnp_c.la $(GTEST_LDFLAGS)
-TESTS = capn-test 
-endif
+capn_test_CPPFLAGS = $(AM_CPPFLAGS) $(GTEST_CPPFLAGS)
+capn_test_CXXFLAGS = -std=gnu++11 -pthread
+capn_test_LDADD = libcapnp_c.la $(GTEST_LDADD)
+capn_test_LDFLAGS = -pthread
+TESTS = capn-test

configure.ac

@@ -35,20 +35,7 @@ AC_SUBST(WERROR)
 #  AC_MSG_ERROR([capnproto base package (0.5.2 or newer) not found])
 #])
 
-AC_ARG_WITH(gtest,
-  AS_HELP_STRING([--without-gtest], [disable unit tests using gtest]))
-if test "x$with_gtest" != "xno" ; then
-  AC_PATH_TOOL([GTEST_CONFIG], [gtest-config], [no])
-  if test x"$GTEST_CONFIG" = x"no"; then
-    AC_MSG_ERROR([gtest installation not found])
-  fi
-  GTEST_LDFLAGS="`${GTEST_CONFIG} --ldflags --libs`"
-  GTEST_CFLAGS="`${GTEST_CONFIG} --cppflags --cxxflags`"
-  gtest=yes
-fi
-AC_SUBST(GTEST_LDFLAGS)
-AC_SUBST(GTEST_CFLAGS)
-AM_CONDITIONAL([GTEST], [test "x$gtest" = "xyes"])
+AC_CONFIG_SUBDIRS([gtest/googletest])
 
 AC_CONFIG_FILES([
 	Makefile

gtest

@@ -0,0 +1 @@
+Subproject commit d225acc90bc3a8c420a9bcd1f033033c1ccd7fe0