这是一个交叉编译问题。
我创建了并使用protobuf-c项目生成了C代码。在x86 linux上编译成功。
但是当我为MIPS交叉编译它时,它出现了编译错误。我使用buildroot编译了protobuf,protobuf-c。而工具链就是魔法工具。
源代码如下所示。
#include <string.h>
#include "egmessage.pb-c.h" //header file that protobuf-c generated. I never touched it.
int main (void)
{
printf("Hell
系统: Ubuntu 16.04
我安装了protobuf,下一步是:
sudo apt-get install autoconf automake libtool curl make g++ unzip
wget https://github.com/google/protobuf/releases/download/v3.2.0/protobuf-cpp-3.2.0.tar.gz
tar -xvf protobuf-cpp-3.2.0.tar.gz
cd protobuf-3.2.0
./autogen.sh
./configure
make
make check
sudo make in
问题是当一个结构符合协议(让我们称它为PA)和可解码时,但是PA强加了一个类型为不可解码的属性。示例:
protocol PA {
var b: [PB]? { get }
}
protocol PB {}
struct SA: PA, Decodable {
let b: [PB]? // SA's conformance to Decodable wants this to be [Decodable], but PA's conformance imposes [PB]
}
struct SB: PB, Decodable {}
上述代码拒绝编译,因
我尝试构建默认的hello world () grpc示例,但使用的是conan grpc。我修改了cmakelist:
# Copyright 2018 gRPC authors.
#
# Licensed under the Apache License, Version 2.0 (the "License");
# you may not use this file except in compliance with the License.
# You may obtain a copy of the License at
#
# http://www.apac
按照这个的答案,我尝试运行以下代码
import gtk.gdk
w = gtk.gdk.get_default_root_window()
sz = w.get_size()
print "The size of the window is %d x %d" % sz
pb = gtk.gdk.Pixbuf(gtk.gdk.COLORSPACE_RGB,False,8,sz[0],sz[1])
pb = pb.get_from_drawable(w,w.get_colormap(),0,0,0,0,sz[0],sz[1])
if (pb != None):
pb.s