从头开始交叉编译 C 程序

如何解决从头开始交叉编译 C 程序

我拥有一个运行基于 linux 内核的 Qualcomm LE 操作系统的锁定调制解调器。虽然我能够以用户身份通过​​ SSH 进入它，但我没有访问许多文件夹的提升权限。我想编译一个程序在这个设备上运行，所以我在我自己的基于 x86-64 的计算机上安装了 Ubuntu，但我不知道如何继续安装正确的 gcc 工具链并为三元组 arm-oe-linux-gnueabi 进行编译。我可以遵循哪些步骤来创建可在此设备上运行的二进制文件，而无需进行本机编译？ 我在下面提供了相关的设备信息：

$ cat /proc/cpuinfo
processor       : 0
model name      : ARMv7 Processor rev 5 (v7l)
BogoMIPS        : 38.40
Features        : half thumb fastmult vfp edsp neon vfpv3 tls vfpv4 idiva idivt vfpd32 lpae
CPU implementer : 0x41
CPU architecture: 7
CPU variant     : 0x0
CPU part        : 0xc07
CPU revision    : 5

Hardware        : Qualcomm Technologies,Inc MDM9207
Revision        : 0000
Processor       : ARMv7 Processor rev 5 (v7l)

$ cat /proc/version
Linux version 3.18.44 (buildfarm@bf-rmsz-04) (gcc version 4.9.3 (GCC) ) #1 PREEMPT Wed May 15 22:09:02 CST 2019
/ $ uname -a
Linux mdm9607 3.18.44 #1 PREEMPT Wed May 15 22:09:02 CST 2019 armv7l GNU/Linux

可执行的检索形式调制解调器：

$ readelf -h nativeApp
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:                              DYN (Shared object file)
  Machine:                           ARM
  Version:                           0x1
  Entry point address:               0x12b0
  Start of program headers:          52 (bytes into file)
  Start of section headers:          16812 (bytes into file)
  Flags:                             0x5000000,Version5 EABI
  Size of this header:               52 (bytes)
  Size of program headers:           32 (bytes)
  Number of program headers:         10
  Size of section headers:           40 (bytes)
  Number of section headers:         32
  Section header string table index: 31

我编译的可执行文件：

$ readelf -h compiledByMe
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:                           ARM
  Version:                           0x1
  Entry point address:               0x10961
  Start of program headers:          52 (bytes into file)
  Start of section headers:          19180 (bytes into file)
  Flags:                             0x5000400,Version5 EABI,hard-float ABI
  Size of this header:               52 (bytes)
  Size of program headers:           32 (bytes)
  Number of program headers:         9
  Size of section headers:           40 (bytes)
  Number of section headers:         37
  Section header string table index: 36