Ralink SoC 的 GCC（工具链） - 找不到 ELF 和语法错误

Question

我买了一个中国的P2P摄像头，没有MJPEG流，所以想编译mjpg-streamer一下。这是我的 CPU 信息：

# cat /proc/cpuinfo 
system type             : Ralink SoC
processor               : 0
cpu model               : MIPS 24K V4.12
BogoMIPS                : 239.61
wait instruction        : yes
microsecond timers      : yes
tlb_entries             : 32
extra interrupt vector  : yes
hardware watchpoint     : yes
ASEs implemented        : mips16 dsp
VCED exceptions         : not available
VCEI exceptions         : not available

# uname -a
Linux (none) 2.6.21 #878 Tue Oct 29 09:53:25 CST 2013 mips unknown

我尝试将Sourcery CodeBench 用于 MIPS GNU/Linux（最新版本）并尝试使用以下命令编译一个简单的“Hello world”示例：

$ mips-linux-gnu-gcc -Wall hello.c -o hello

执行后，我收到以下消息：

# ./hello 
./hello: line 1: ELF@04: not found
./hello: line 2: syntax error: "(" unexpected

接下来我尝试使用以下命令重新编译：

$ mips-linux-gnu-gcc -mips16 -Wall hello.c -o hello

但结果是：

# ./hello 
./hello: line 1: syntax error: "(" unexpected

• 我是否使用了错误的编译器，如果是，哪个是正确的？
• 我是否遗漏或使用了错误的论点？

编辑：

$readelf -h HKIPC #Extracted file from the device
ELF Header:
  Magic:   7f 45 4c 46 01 01 01 00 00 00 00 00 00 00 00 00 
  Class:                             ELF32
  Data:                              2's complement, little endian
  Version:                           1 (current)
  OS/ABI:                            UNIX - System V
  ABI Version:                       0
  Type:                              EXEC (Executable file)
  Machine:                           MIPS R3000
  Version:                           0x1
  Entry point address:               0x406420
  Start of program headers:          52 (bytes into file)
  Start of section headers:          643764 (bytes into file)
  Flags:                             0x10001007, noreorder, pic, cpic, o32, mips2
  Size of this header:               52 (bytes)
  Size of program headers:           32 (bytes)
  Number of program headers:         6
  Size of section headers:           40 (bytes)
  Number of section headers:         25
  Section header string table index: 24

$file HKIPC 
HKIPC: ELF 32-bit LSB executable, MIPS, MIPS-II version 1 (SYSV), dynamically linked (uses shared libs), stripped

——

$readelf -h hello #Compiled with mips-linux-gnu-gcc -mips2 -EL -mabi=32 hello.c  -o hello
ELF Header:
  Magic:   7f 45 4c 46 01 01 01 00 01 00 00 00 00 00 00 00 
  Class:                             ELF32
  Data:                              2's complement, little endian
  Version:                           1 (current)
  OS/ABI:                            UNIX - System V
  ABI Version:                       1
  Type:                              EXEC (Executable file)
  Machine:                           MIPS R3000
  Version:                           0x1
  Entry point address:               0x400430
  Start of program headers:          52 (bytes into file)
  Start of section headers:          2732 (bytes into file)
  Flags:                             0x70001005, noreorder, cpic, o32, mips32r2
  Size of this header:               52 (bytes)
  Size of program headers:           32 (bytes)
  Number of program headers:         8
  Size of section headers:           40 (bytes)
  Number of section headers:         34
  Section header string table index: 31

$file hello
hello: ELF 32-bit LSB executable, MIPS, MIPS32 rel2 version 1, dynamically linked (uses shared libs), with unknown capability 0xf41 = 0x756e6700, with unknown capability 0x70100 = 0x1040000, not stripped

Answer 1

相机的 libc 与工具链使用的 libc 不匹配。在这种情况下，必须静态编译程序并添加-static开关。之后“Hello world”就可以在设备上执行了。另一个解决方案是添加所有必需的共享库（我尚未对此进行测试）。

#mipslinux irc 频道的人们帮助我解决了这个问题 - 谢谢。