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user5265160
Asked: 2019-11-13 09:51:28 +0800 CST

How to set the CC environmental variable during debian cross packing

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I'm trying to build a debian package for an ARM64 platform on my AMD64 Ubuntu OS. I execute the command

debuild -us -uc --host-arch arm64

but get the warning

dpkg-architecture: warning: specified GNU system type aarch64-linux-gnu does not match CC system type x86_64-linux-gnu, try setting a correct CC environment variable

and so would like to know how to set the CC environment variable, as the warning advises. For my target OS I would typically use

/opt/l4t-gcc-toolchain-64-bit-32.1/install/bin/aarch64-linux-gnu-gcc

Thanks.

debian gcc cross-compilation

1 Answers

  1. Best Answer

    I'm not sure about what is missing on the long run, as OP didn't mention any info about it target package and anyway to check solution my side. Happy to hear your feedback about similar case.

    The message is about C Compiler (CC) environment variable is not convenient for the requested target architecture. Try dpkg-cross which may help you set all ENV variables for you.

    debuild is a helper that uses dpkg-buildpackage

    1. Install dpkg-cross package

      sudo apt install dpkg-cross build-essential

    2. Set the cross-compile config variables and helping flags before building

      set CONFIG_SITE=/etc/dpkg-cross/cross-config.arm64
set DEB_BUILD_OPTIONS=nocheck

    3. Try build it again

    If it doesn't work, try passing through debuild the cross-compile options of dpkg-buildpackage. All steps documented in Debian Wiki: Building with dpkg-buildpackage.

    Note:

    If you are build you own package, good to read how to make your package Debian cross-compile friendly: Guidelines for cross-build friendly packages

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