tests: fix broken linkage with --disable-static

configure.ac

@@ -695,6 +695,9 @@ if test "x$threads" != "xyes" ||
     AC_DEFINE([NOTHREADS], [1], [Define to 1 if you want to disable threads.])
 fi
 
+# propagate $enable_static to tests/Makefile.am
+AM_CONDITIONAL([ENABLE_STATIC], [test "x$enable_static" = "xyes"])
+
 AC_SUBST([TESTLDADD])
 AC_SUBST([APPLDFLAGS])
 

tests/Makefile.am

@@ -49,7 +49,15 @@ HFILES = nghttp2_pq_test.h nghttp2_map_test.h nghttp2_queue_test.h \
 
 main_SOURCES = $(HFILES) $(OBJECTS)
 
-main_LDADD = ${top_builddir}/lib/libnghttp2.la @CUNIT_LIBS@ @TESTLDADD@
+if ENABLE_STATIC
+main_LDADD = ${top_builddir}/lib/libnghttp2.la
+else
+# With static lib disabled and symbol hiding enabled, we have to link object
+# files directly because the tests use symbols not included in public API.
+main_LDADD = ${top_builddir}/lib/.libs/*.o
+endif
+
+main_LDADD += @CUNIT_LIBS@ @TESTLDADD@
 main_LDFLAGS = -static
 
 if ENABLE_FAILMALLOC