AARCH64 gcc #include <stdint.h> fails

Question

I am trying to compile some kernel code for a raspberry pi 3 from a x86 computer using the aarch64 cross compiler in one of my source files I require stdint.h however when I try to compile it fails saying

>make
rm kernel8.elf *.o >/dev/null 2>/dev/null || true
rm -rf *.o *.img *.elf
aarch64-linux-gnu-gcc -Wall -c start.s -o start.o
aarch64-linux-gnu-gcc -Wall -c delays.c -o delays.o
In file included from gpio.h:4:0,
                 from delays.c:26:
/usr/lib/gcc/aarch64-linux-gnu/7/include/stdint.h:9:16: fatal error: stdint.h:     No such file or directory
 # include_next <stdint.h>
                ^~~~~~~~~~
compilation terminated.
make: *** [Makefile:15: delays.o] Error 1

I am running Fedors 26 and have used

sudo dnf install *aarch64*

so I have all the appropriate packages or should have.

Answer 1

I would suggest to use the latest Linaro toolchain for x86: I have had a couple of issues in the past with ARM cross-compilers provided with mainstream Debian/Ubuntu.

Using the following stdint.c example:

#include <stdio.h>
#include <stdint.h>
#include <stdlib.h>
int main(int argc, char** argv)
{
    printf("The size of an uint32_t is %d.\n", sizeof(uint32_t));
    return EXIT_SUCCESS;
}

mkdir -p /opt/linaro
wget https://releases.linaro.org/components/toolchain/binaries/latest/aarch64-linux-gnu/gcc-linaro-7.2.1-2017.11-i686_aarch64-linux-gnu.tar.xz
tar Jxvf gcc-linaro-7.2.1-2017.11-i686_aarch64-linux-gnu.tar.xz -C /opt/linaro
/opt/linaro/gcc-linaro-7.2.1-2017.11-i686_aarch64-linux-gnu/bin/aarch64-linux-gnu-gcc -o stdint stdint.c

The compilation should succeed, and you should get a working AARCH64 executable:

readelf -h stdint
ELF Header:
  Magic:   7f 45 4c 46 02 01 01 00 00 00 00 00 00 00 00 00 
  Class:                             ELF64
  Data:                              2's complement, little endian
  Version:                           1 (current)
  OS/ABI:                            UNIX - System V
  ABI Version:                       0
  Type:                              EXEC (Executable file)
  Machine:                           AArch64
  Version:                           0x1
  Entry point address:               0x4003f0
  Start of program headers:          64 (bytes into file)
  Start of section headers:          4872008 (bytes into file)
  Flags:                             0x0
  Size of this header:               64 (bytes)
  Size of program headers:           56 (bytes)
  Number of program headers:         6
  Size of section headers:           64 (bytes)
  Number of section headers:         37
  Section header string table index: 36

If you have an x86_64 development PC, using the x86_64 version of the Linaro toolchain would of course be preferable.