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7631 :: Compiling for arm/arm64

• drkameleon (orginal) [2021-03-15T12:59:10+01:00] view original

  I've been experimenting with compilation for arm/arm64 on Ubuntu 20.04.

  I've installed the (supposedly) needed packages and I'm good to go.

  Here's my config.nims configuration:

  arm.linux.gcc.path = "/usr/bin"
  arm.linux.gcc.exe = "arm-linux-gnueabi-gcc"
  arm.linux.gcc.linkerexe = "arm-linux-gnueabi-gcc"
  
  arm64.linux.gcc.path = "/usr/bin"
  arm64.linux.gcc.exe = "aarch64-linux-gnu-gcc"
  arm64.linux.gcc.linkerexe = "aarch64-linux-gnu-gcc"
  Run

  When I pass the compiler --cpu:arm --os:linux, suddenly existing header files (namely gmp.h) cannot be found - so I guess there's something wrong with where arm-linux-gnueabi-gcc is looking for the header.

  The main problem is with --cpu:arm64 --os:linux, in that case... the compiler seems to be using gcc and not aarch64-linux-gnu-gcc.

  What is going on?

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• drkameleon (orginal) [2021-03-15T13:18:28+01:00] view original

  I kindof managed to solve the problem with arm64:

  • I switched to aarch64-linux-musl-gcc (https://jensd.be/1126/linux/cross-compiling-for-arm-or-aarch64-on-debian-or-ubuntu)
  • I specified the options directly in the command-line

  Now, the only remaining thing is the missing header:

  
  /root/arturo/aarch64-linux-musl-cross/bin/aarch64-linux-musl-gcc -c  -w -fmax-errors=3 '-O3' -Os -fno-ident   -I/root/.choosenim/toolchains/nim-1.4.4/lib -I/root/arturo/src/extras -I/root/arturo/src -o /root/arturo/.cache/stdlib_iterators.nim.c.o /root/arturo/.cache/stdlib_iterators.nim.c [Exec]
  /root/arturo/.cache/stdlib_iterators.nim.c:13:10: fatal error: gmp.h: No such file or directory
     13 | #include <gmp.h>
        |          ^~~~~~~
  
  Run

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• cantanima (orginal) [2021-03-15T15:10:56+01:00] view original

  This is probably a dumb question, but: Are you able to compile and execute an ordinary C program that uses gmp.h?

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• drkameleon (orginal) [2021-03-15T16:16:55+01:00] view original

  The very same program - with cross-compiling to arm - works fine.

  I'm now trying to compile it all from scratch in an Alpine arm64 build.

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