为什么不在gcc -c上工作

>echo > foobar.c
>strace gcc -c foobar.c 2>&1 | grep foobar.o
>

（没有） - foobar.o 正在写明显，但我没有看到它在strace。为什么？

linux strace

— user461984
source

这是因为 gcc 创建子进程，和 strace 除非您指定子进程，否则不会查看子进程 -ff 旗。

看到 strace -ff 此示例中的标志：

deltik@workstation [~/Desktop]# echo > foobar.c
deltik@workstation [~/Desktop]# strace -ff gcc -c foobar.c 2>&1 | grep foobar.o
[pid 14220] execve("/usr/local/sbin/as", ["as", "--64", "-o", "foobar.o", "/tmp/ccJhzHTZ.s"], [/* 66 vars */]) = -1 ENOENT (No such file or directory)
[pid 14220] execve("/usr/local/bin/as", ["as", "--64", "-o", "foobar.o", "/tmp/ccJhzHTZ.s"], [/* 66 vars */]) = -1 ENOENT (No such file or directory)
[pid 14220] execve("/usr/sbin/as", ["as", "--64", "-o", "foobar.o", "/tmp/ccJhzHTZ.s"], [/* 66 vars */]) = -1 ENOENT (No such file or directory)
[pid 14220] execve("/usr/bin/as", ["as", "--64", "-o", "foobar.o", "/tmp/ccJhzHTZ.s"], [/* 66 vars */] <unfinished ...>
[pid 14220] stat("foobar.o", 0x7ffed65b3850) = -1 ENOENT (No such file or directory)
[pid 14220] open("foobar.o", O_RDWR|O_CREAT|O_TRUNC, 0666) = 3

— Deltik
source