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linux: improve cross compilation with clang

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set HOST* variables for host build tools
* do not assume the host compiler is gcc
* pass all build tools to make
This commit is contained in:
Michael Roitzsch 2021-02-15 20:15:48 +01:00
parent 50dd350c4c
commit 270ee17d41
2 changed files with 8 additions and 4 deletions
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2
pkgs/os-specific/linux/kernel/generate-config.pl
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@ -40,7 +40,7 @@ close ANSWERS;
sub runConfig {
# Run `make config'.
my $pid = open2(\*IN, \*OUT, "make -C $ENV{SRC} O=$buildRoot config SHELL=bash ARCH=$ENV{ARCH}");
my $pid = open2(\*IN, \*OUT, "make -C $ENV{SRC} O=$buildRoot config SHELL=bash ARCH=$ENV{ARCH} CC=$ENV{CC} HOSTCC=$ENV{HOSTCC} HOSTCXX=$ENV{HOSTCXX}");
# Parse the output, look for questions and then send an
# appropriate answer.

10
pkgs/os-specific/linux/kernel/generic.nix
View file

@ -131,12 +131,16 @@ let
buildPhase = ''
export buildRoot="''${buildRoot:-build}"
export HOSTCC=$CC_FOR_BUILD
export HOSTCXX=$CXX_FOR_BUILD
export HOSTAR=$AR_FOR_BUILD
export HOSTLD=$LD_FOR_BUILD
# Get a basic config file for later refinement with $generateConfig.
make -C . O="$buildRoot" $kernelBaseConfig \
make -C . O="$buildRoot" $kernelBaseConfig \
ARCH=$kernelArch \
HOSTCC=${buildPackages.stdenv.cc.targetPrefix}gcc \
HOSTCXX=${buildPackages.stdenv.cc.targetPrefix}g++
HOSTCC=$HOSTCC HOSTCXX=$HOSTCXX HOSTAR=$HOSTAR HOSTLD=$HOSTLD \
CC=$CC OBJCOPY=$OBJCOPY OBJDUMP=$OBJDUMP READELF=$READELF
# Create the config file.
echo "generating kernel configuration..."