Use _LDADD to specify libraries instead of _LDFLAGS

This is because _LDFLAGS comes before _LDADD.  If we specify a library
and another library in _LDADD depends on it, we get undefined
reference error.

configure.ac

@@ -236,7 +236,7 @@ AC_LANG_POP()
 # Checks for libraries.
 
 # Additional libraries required for tests.
-TESTLDFLAGS=
+TESTLDADD=
 
 # Additional libraries required for programs under src directory.
 APPLDFLAGS=
@@ -245,7 +245,7 @@ LIBS_OLD=$LIBS
 # Search for dlsym function, which is used in tests. Linux needs -ldl,
 # but netbsd does not need it.
 AC_SEARCH_LIBS([dlsym], [dl])
-TESTLDFLAGS="$LIBS $TESTLDFLAGS"
+TESTLDADD="$LIBS $TESTLDADD"
 LIBS=$LIBS_OLD
 
 LIBS_OLD=$LIBS
@@ -636,7 +636,7 @@ if test "x$threads" != "xyes" ||
     AC_DEFINE([NOTHREADS], [1], [Define to 1 if you want to disable threads.])
 fi
 
-AC_SUBST([TESTLDFLAGS])
+AC_SUBST([TESTLDADD])
 AC_SUBST([APPLDFLAGS])
 
 AC_CONFIG_FILES([

examples/Makefile.am

@@ -33,12 +33,10 @@ AM_CPPFLAGS = \
 	@LIBEVENT_OPENSSL_CFLAGS@ \
 	@OPENSSL_CFLAGS@ \
 	@DEFS@
-AM_LDFLAGS = \
+LDADD = $(top_builddir)/lib/libnghttp2.la \
+	$(top_builddir)/third-party/libhttp-parser.la \
 	@LIBEVENT_OPENSSL_LIBS@ \
 	@OPENSSL_LIBS@
-LDADD = \
-	$(top_builddir)/lib/libnghttp2.la \
-	$(top_builddir)/third-party/libhttp-parser.la
 
 noinst_PROGRAMS = client libevent-client libevent-server deflate
 
@@ -63,22 +61,18 @@ if ENABLE_ASIO_LIB
 noinst_PROGRAMS += asio-sv asio-sv2 asio-sv3
 
 ASIOCPPFLAGS = ${BOOST_CPPFLAGS} ${AM_CPPFLAGS}
-ASIOLDFLAGS = @JEMALLOC_LIBS@
-ASIOLDADD = $(top_builddir)/src/libnghttp2_asio.la
+ASIOLDADD = $(top_builddir)/src/libnghttp2_asio.la @JEMALLOC_LIBS@
 
 asio_sv_SOURCES = asio-sv.cc
 asio_sv_CPPFLAGS = ${ASIOCPPFLAGS}
-asio_sv_LDFLAGS = ${ASIOLDFLAGS}
 asio_sv_LDADD = ${ASIOLDADD}
 
 asio_sv2_SOURCES = asio-sv2.cc
 asio_sv2_CPPFLAGS = ${ASIOCPPFLAGS}
-asio_sv2_LDFLAGS = ${ASIOLDFLAGS}
 asio_sv2_LDADD = ${ASIOLDADD}
 
 asio_sv3_SOURCES = asio-sv3.cc
 asio_sv3_CPPFLAGS = ${ASIOCPPFLAGS}
-asio_sv3_LDFLAGS = ${ASIOLDFLAGS}
 asio_sv3_LDADD = ${ASIOLDADD}
 
 endif # ENABLE_ASIO_LIB

src/Makefile.am

@@ -41,7 +41,9 @@ AM_CPPFLAGS = \
 	@JANSSON_CFLAGS@ \
 	@ZLIB_CFLAGS@ \
 	@DEFS@
-AM_LDFLAGS = \
+
+LDADD = $(top_builddir)/lib/libnghttp2.la \
+	$(top_builddir)/third-party/libhttp-parser.la \
 	@JEMALLOC_LIBS@ \
 	@LIBSPDYLAY_LIBS@ \
 	@XML_LIBS@ \
@@ -51,10 +53,6 @@ AM_LDFLAGS = \
 	@ZLIB_LIBS@ \
 	@APPLDFLAGS@
 
-LDADD = \
-	$(top_builddir)/lib/libnghttp2.la \
-	$(top_builddir)/third-party/libhttp-parser.la
-
 if ENABLE_APP
 
 bin_PROGRAMS += nghttp nghttpd nghttpx
@@ -131,8 +129,7 @@ noinst_LIBRARIES = libnghttpx.a
 libnghttpx_a_SOURCES = ${NGHTTPX_SRCS}
 
 nghttpx_SOURCES = shrpx.cc shrpx.h
-nghttpx_LDFLAGS =
-nghttpx_LDADD = libnghttpx.a ${LDADD} ${AM_LDFLAGS}
+nghttpx_LDADD = libnghttpx.a ${LDADD}
 
 if HAVE_CUNIT
 check_PROGRAMS += nghttpx-unittest
@@ -147,10 +144,8 @@ nghttpx_unittest_SOURCES = shrpx-unittest.cc \
 	ringbuf_test.cc ringbuf_test.h \
 	memchunk_test.cc memchunk_test.h
 nghttpx_unittest_CPPFLAGS = ${AM_CPPFLAGS}\
-	 -DNGHTTP2_TESTS_DIR=\"$(top_srcdir)/tests\"
-nghttpx_unittest_LDFLAGS = ${AM_LDFLAGS} \
-	@CUNIT_LIBS@ @TESTLDFLAGS@
-nghttpx_unittest_LDADD = libnghttpx.a ${LDADD}
+	-DNGHTTP2_TESTS_DIR=\"$(top_srcdir)/tests\"
+nghttpx_unittest_LDADD = libnghttpx.a ${LDADD} @CUNIT_LIBS@ @TESTLDADD@
 
 TESTS += nghttpx-unittest
 endif # HAVE_CUNIT
@@ -186,15 +181,14 @@ libnghttp2_asio_la_SOURCES = \
 	util.cc util.h http2.cc http2.h \
 	ssl.cc ssl.h
 
-libnghttp2_asio_la_CPPFLAGS= ${AM_CPPFLAGS} ${BOOST_CPPFLAGS}
-libnghttp2_asio_la_LDFLAGS = \
+libnghttp2_asio_la_CPPFLAGS = ${AM_CPPFLAGS} ${BOOST_CPPFLAGS}
+libnghttp2_asio_la_LDFLAGS = -no-undefined -version-info 0:0:0
+libnghttp2_asio_la_LIBADD = \
+	$(top_builddir)/lib/libnghttp2.la \
 	${BOOST_LDFLAGS} \
 	${BOOST_ASIO_LIB} \
 	${BOOST_THREAD_LIB} \
 	${BOOST_SYSTEM_LIB} \
-	@OPENSSL_LIBS@ \
-	-no-undefined \
-	-version-info 0:0:0
-libnghttp2_asio_la_LIBADD = $(top_builddir)/lib/libnghttp2.la
+	@OPENSSL_LIBS@
 
 endif # ENABLE_ASIO_LIB

tests/Makefile.am

@@ -49,8 +49,8 @@ HFILES = nghttp2_pq_test.h nghttp2_map_test.h nghttp2_queue_test.h \
 
 main_SOURCES = $(HFILES) $(OBJECTS)
 
-main_LDADD = ${top_builddir}/lib/libnghttp2.la
-main_LDFLAGS = -static @CUNIT_LIBS@ @TESTLDFLAGS@
+main_LDADD = ${top_builddir}/lib/libnghttp2.la @CUNIT_LIBS@ @TESTLDADD@
+main_LDFLAGS = -static
 
 if ENABLE_FAILMALLOC
 failmalloc_SOURCES = failmalloc.c failmalloc_test.c failmalloc_test.h \