在Linux中锵块？ [英] Clang block in Linux?

问题描述

锵有一个非常酷的扩展名为块带来真正的lambda函数机制C.比起块，gcc的嵌套函数相当有限。但是，试图编译一个简单的程序 C.C ：

Clang has a very cool extension named block bringing true lambda function mechanism to C. Compared to block, gcc's nested functions are quite limited. However, trying to compile a trivial program c.c:

#include <stdio.h>

int main() {
    void (^hello)(void) = ^(void) {
        printf("Hello, block!\n");
    };
    hello();
    return 0;
}

与铛-fblocks C.C ，我得到了

/usr/bin/ld.gold: /tmp/cc-NZ7tqa.o: in function __block_literal_global:c.c(.rodata+0x10): error: undefined reference to '_NSConcreteGlobalBlock'
clang: error: linker command failed with exit code 1 (use -v to see invocation)

看来我应该使用铛-fblocks C.C -lBlocksRuntime ，但后来我得到了

/usr/bin/ld.gold: error: cannot find -lBlocksRuntime
(the rest is the same as above)

任何提示？

推荐答案

在Ubuntu Linux操作系统：

On Ubuntu Linux:

sudo apt-get install llvm
sudo apt-get install clang
sudo apt-get install libblocksruntime-dev

test.c以：

#include <stdio.h>

int main() {
    void (^hello)(void) = ^(void) {
        printf("Hello, block!\n");
    };
    hello();
    return 0;
}

编译：

clang test.c -fblocks -lBlocksRuntime -o test
./test

Hello, block!

正常工作。

这篇关于在Linux中锵块？的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！