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fixupCFlagsForDarwin() {
# Because it’s getting called from a Darwin stdenv, MinGW will pick up on Darwin-specific
# flags, and the ./configure tests will fail to consider it a working cross-compiler.
# Strip them out, so Wine can use MinGW to build its DLLs instead of trying to use Clang.
# Ideally, it would be possible to build the DLLs on Windows (i.e., as part of `pkgsCross``),
# but that is not the case currently with Wine’s build system.
cflagsFilter='s|-F[^ ]*||g;s|-iframework [^ ]*||g;s|-isystem [^ ]*||g;s| *| |g'
# libiconv and libintl aren’t needed by Wine, and having them causes linking to fail.
# The `CoreFoundation` reference is added by `linkSystemCoreFoundationFramework` in the
# Apple SDK’s setup hook. Remove that because MingW will fail due to file not found.
ldFlagsFilter='s|-lintl||g;s|-liconv||g;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 Wine derivation will provide them:
# - for Darwin: The source is `stdenv.cc.suffixSalt`; and
# - for MinGW: The source is the `suffixSalt`` attribute of each of the `mingwGccs`.
export NIX_CFLAGS_COMPILE_@darwinSuffixSalt@=${NIX_CFLAGS_COMPILE-}
export NIX_LDFLAGS_@darwinSuffixSalt@=${NIX_LDFLAGS-}
for mingwSalt in @mingwGccsSuffixSalts@; do
echo removing @darwinSuffixSalt@-specific flags from NIX_CFLAGS_COMPILE for $mingwSalt
export NIX_CFLAGS_COMPILE_$mingwSalt+="$(sed "$cflagsFilter" <<< "$NIX_CFLAGS_COMPILE")"
echo removing @darwinSuffixSalt@-specific flags from NIX_LDFLAGS for $mingwSalt
export NIX_LDFLAGS_$mingwSalt+="$(sed "$ldFlagsFilter;$cflagsFilter" <<< "$NIX_LDFLAGS")"
done
# 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)
}
postUnpackHooks+=(runFixupCFlagsForDarwinLast)
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