futility: workaround for broken toolchain in static builds

The cros-compiler doesn't support backtrace(3) when linked
statically. Until that's fixed, just don't use it.

BUG=chromium:437107
BRANCH=ToT, samus
TEST=manual

FEATURES=test emerge-link vboot_reference
/build/link/usr/bin/futility_s gbb_utility -c 100,100,100,100 test.bin
/build/link/usr/bin/futility_s gbb_utility -s --hwid=HEY test.bin

Change-Id: I66b76fc8c0aa92f95976c5d5015f62730bb12064
Signed-off-by: Bill Richardson <wfrichar@chromium.org>
Reviewed-on: https://chromium-review.googlesource.com/232234
Reviewed-by: Mike Frysinger <vapier@chromium.org>

Makefile

@@ -566,7 +566,11 @@ endif
 FUTIL_STATIC_CMD_LIST = ${BUILD}/gen/futility_static_cmds.c
 FUTIL_CMD_LIST = ${BUILD}/gen/futility_cmds.c
 
+# Workaround for TODO(crbug.com/437107).
+FUTIL_STATIC_WORKAROUND_SRCS = firmware/stub/vboot_api_stub_static_sf.c
+
 FUTIL_STATIC_OBJS = ${FUTIL_STATIC_SRCS:%.c=${BUILD}/%.o} \
+	${FUTIL_STATIC_WORKAROUND_SRCS:%.c=${BUILD}/%.o} \
 	${FUTIL_STATIC_CMD_LIST:%.c=%.o}
 FUTIL_OBJS = ${FUTIL_SRCS:%.c=${BUILD}/%.o} ${FUTIL_CMD_LIST:%.c=%.o}
 

firmware/stub/vboot_api_stub_static_sf.c

@@ -0,0 +1,39 @@
+/* Copyright (c) 2014 The Chromium OS Authors. All rights reserved.
+ * Use of this source code is governed by a BSD-style license that can be
+ * found in the LICENSE file.
+ *
+ * Workaround for TODO(crbug.com/437107). Remove this file when it's fixed.
+ */
+
+#define _STUB_IMPLEMENTATION_
+
+#include <stdio.h>
+#include <stdlib.h>
+
+#include "vboot_api.h"
+
+void *VbExMalloc(size_t size)
+{
+	void *p = malloc(size);
+
+	if (!p) {
+		/* Fatal Error. We must abort. */
+		abort();
+	}
+
+	return p;
+}
+void VbExFree(void *ptr)
+{
+	free(ptr);
+}
+
+
+/*
+ * This file should be used only when building the static version of futility,
+ * so let's intentionally break any tests that link with it by accident.
+ */
+int vboot_api_stub_check_memory(void)
+{
+	return -1;
+}