在埃级上编译 c/c++ 程序

C和C++程序未在埃级操作系统上编译

C Progam （board.c）：

#include<stdio.h>
void main(){
    printf("hello world");
}

在埃级终端上编译C程序

root@pldek-beagle:~/Comparison# gcc board.c -o board
/usr/lib/gcc/arm-angstrom-linux-gnueabi/4.7.3/../../../../arm-angstrom-linux-gnueabi/bin/ld: this linker was not configured to use sysroots
collect2: error: ld returned 1 exit status

root@pldek-beagle:~/Comparison# gcc --sysroot=/usr/local  board.c -o board
board.c:1:18: fatal error: stdio.h: No such file or directory
compilation terminated.
root@pldek-beagle:~/Comparison# whereis stdio
stdio: /usr/include/stdio.h
root@pldek-beagle:~/Comparison# echo $PATH
/mnt/data/bin:/usr/local/bin:/usr/bin:/bin:/usr/local/sbin:/usr/sbin:/sbin:/usr/include/c++/:/usr/include/:/usr/include/c++/:/usr/include/c++:/usr/include/c++/:/usr/include/c++/:/usr/include/c++/:/usr/include/:/usr/include

正如你在上面看到的，stdio.h 路径在$PATH中可用，即使这样 gcc 也无法找到它。

C++ Progam （beagle.cpp）：

using namespace std;
#include<iostream>
void main(){
    cout<<"hello world";
}

在埃级终端上编译C++程序

root@pldek-beagle:~/Comparison# g++ beagle.cpp -o beagle
/usr/lib/gcc/arm-angstrom-linux-gnueabi/4.7.3/../../../../arm-angstrom-linux-gnueabi/bin/ld: this linker was not configured to use sysroots
collect2: error: ld returned 1 exit status
root@pldek-beagle:~/Comparison# g++ --sysroot=/usr/local  beagle.cpp -o beagle
beagle.cpp:2:19: fatal error: iostream: No such file or directory
compilation terminated.
root@pldek-beagle:~/Comparison# whereis iostream
iostream: /usr/include/c++/iostream
echo $PATH
/mnt/data/bin:/usr/local/bin:/usr/bin:/bin:/usr/local/sbin:/usr/sbin:/sbin:/usr/include/c++/:/usr/include/:/usr/include/c++/:/usr/include/c++:/usr/include/c++/:/usr/include/c++/:/usr/include/c++/:/usr/include/:/usr/include

正如你在上面看到的，iostream 路径在$PATH中可用，即使这样 g++ 也无法找到它。