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fixupCFlagsForDarwin() {
# Because it’s getting called from a Darwin stdenv, avr-gcc will pick up on
# Darwin-specific flags, and it will barf and die on -iframework in
# particular. Strip them out, so simavr can compile its test firmware.
cflagsFilter='s|-F[^ ]*||g;s|-iframework [^ ]*||g;s|-isystem [^ ]*||g;s| *| |g'
# The `CoreFoundation` reference is added by `linkSystemCoreFoundationFramework` in the
# Apple SDK’s setup hook. Remove that because avr-gcc will fail due to file not found.
ldFlagsFilter='s|/nix/store/[^-]*-apple-framework-CoreFoundation[^ ]*||g'
# `cc-wrapper.sh`` supports getting flags from a system-specific salt. While it is currently a
# tuple, that’s not considered a stable interface, so the derivation will provide them.
export NIX_CFLAGS_COMPILE_@darwinSuffixSalt@=${NIX_CFLAGS_COMPILE-}
export NIX_LDFLAGS_@darwinSuffixSalt@=${NIX_LDFLAGS-}
echo removing @darwinSuffixSalt@-specific flags from NIX_CFLAGS_COMPILE for @avrSuffixSalt@
export NIX_CFLAGS_COMPILE_@avrSuffixSalt@+="$(sed "$cflagsFilter" <<< "$NIX_CFLAGS_COMPILE")"
echo removing @darwinSuffixSalt@-specific flags from NIX_LDFLAGS for @avrSuffixSalt@
export NIX_LDFLAGS_@avrSuffixSalt@+="$(sed "$ldFlagsFilter;$cflagsFilter" <<< "$NIX_LDFLAGS")"
# Make sure the global flags aren’t accidentally influencing the platform-specific flags.
export NIX_CFLAGS_COMPILE=""
export NIX_LDFLAGS=""
}
# This is pretty hacky, but this hook _must_ run after `linkSystemCoreFoundationFramework`.
function runFixupCFlagsForDarwinLast() {
preConfigureHooks+=(fixupCFlagsForDarwin)
}
if [ -z "${dontFixupCFlagsForDarwin-}" ]; then
postUnpackHooks+=(runFixupCFlagsForDarwinLast)
fi
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