{ lib, bootstrapStdenv, buildPackages, fetchpatch2, icu78, # The ICU version should correspond to the same one used by Apple’s ICU package mkAppleDerivation, python3, stdenvNoCC, testers, }: # Based on: # - ../../../development/libraries/icu/make-icu.nix # - https://github.com/apple-oss-distributions/ICU/blob/main/makefile let privateHeaders = stdenvNoCC.mkDerivation { name = "ICU-deps-private-headers"; buildCommand = '' mkdir -p "$out/include/os" cat < "$out/include/os/feature_private.h" #pragma once extern "C" bool _os_feature_enabled_impl(const char*, const char*); #define os_feature_enabled(a, b) _os_feature_enabled_impl(#a, #b) EOF ''; }; stdenv = bootstrapStdenv; withStatic = stdenv.hostPlatform.isStatic; # Cross-compiled icu4c requires a build-root of a native compile nativeBuildRoot = buildPackages.darwin.ICU.buildRootOnly; baseAttrs = finalAttrs: { releaseName = "ICU"; sourceRoot = "${finalAttrs.src.name}/icu/icu4c/source"; patches = [ # Skip MessageFormatTest test, which is known to crash sometimes and should be suppressed if it does. ./patches/0001-suppress-icu-check-crash.patch ]; patchFlags = [ "-p4" ]; preConfigure = '' sed -i -e "s|/bin/sh|${stdenv.shell}|" configure patchShebangs --build . # $(includedir) is different from $(prefix)/include due to multiple outputs sed -i -e 's|^\(CPPFLAGS = .*\) -I\$(prefix)/include|\1 -I$(includedir)|' config/Makefile.inc.in ''; dontDisableStatic = withStatic; configureFlags = [ (lib.enableFeature false "debug") (lib.enableFeature false "renaming") (lib.enableFeature false "extras") (lib.enableFeature false "layout") (lib.enableFeature false "samples") ] ++ lib.optionals (stdenv.hostPlatform.isFreeBSD || stdenv.hostPlatform.isDarwin) [ (lib.enableFeature true "rpath") ] ++ lib.optionals (stdenv.buildPlatform != stdenv.hostPlatform) [ (lib.withFeatureAs true "cross-build" nativeBuildRoot) ] ++ lib.optionals withStatic [ (lib.enableFeature true "static") ]; nativeBuildInputs = [ python3 ]; enableParallelBuilding = true; # Per the source-release makefile, these are enabled. env.NIX_CFLAGS_COMPILE = toString [ "-DU_SHOW_CPLUSPLUS_API=1" "-DU_SHOW_INTERNAL_API=1" "-I${privateHeaders}/include" ]; passthru.tests.pkg-config = testers.testMetaPkgConfig finalAttrs.finalPackage; passthru.buildRootOnly = mkWithAttrs buildRootOnlyAttrs; meta = { description = "Unicode and globalization support library with Apple customizations"; license = lib.licenses.icu; teams = [ lib.teams.darwin ]; platforms = lib.platforms.darwin; pkgConfigModules = [ "icu-i18n" "icu-io" "icu-uc" ]; }; }; realAttrs = self: super: { outputs = [ "out" "dev" ] ++ lib.optional withStatic "static"; outputBin = "dev"; postPatch = lib.optionalString self.finalPackage.doCheck '' # Skip test for missing encodingSamples data. substituteInPlace test/cintltst/ucsdetst.c \ --replace-fail "&TestMailFilterCSS" "NULL" # Disable failing tests substituteInPlace test/cintltst/cloctst.c \ --replace-fail 'TESTCASE(TestCanonicalForm);' "" substituteInPlace test/intltest/rbbitst.cpp \ --replace-fail 'TESTCASE_AUTO(TestExternalBreakEngineWithFakeYue);' "" # Add missing test data. It’s not included in the source release. chmod u+w "$NIX_BUILD_TOP/source/icu" tar -C "$NIX_BUILD_TOP/source" -axf ${lib.escapeShellArg icu78.src} icu/testdata # Otherwise `make install` is broken. substituteInPlace Makefile.in \ --replace-fail '$(top_srcdir)/../LICENSE' "$NIX_BUILD_TOP/source/icu/LICENSE" substituteInPlace config/dist-data.sh \ --replace-fail "\''${top_srcdir}/../LICENSE" "$NIX_BUILD_TOP/source/icu/LICENSE" # Make sure this ICU build puts C++ symbols in a distinct namespace to avoid symbol clashes with other ICU # implementations (including both the system ICU and builds of the upstream ICU). # This breaks binary compatibility for the C++ API, but it’s not ABI stable anyway. Without doing this, # `dotnet` crashes on macOS 26.4 when linked against `libicucore.A.dylib` from Nixpkgs. substituteInPlace common/unicode/uvernum.h \ --replace-fail 'U_ICU_VERSION_SUFFIX ' 'U_ICU_VERSION_SUFFIX _nix' # Only enable symbol renaming for C++ symbols. C symbols need to remain unversioned for compatibility. substituteInPlace common/unicode/uversion.h \ --replace-fail U_DISABLE_RENAMING 0 ''; # remove dependency on bootstrap-tools in early stdenv build postInstall = lib.optionalString withStatic '' mkdir -p $static/lib mv -v lib/*.a $static/lib '' + lib.optionalString stdenv.hostPlatform.isDarwin '' sed -i 's/INSTALL_CMD=.*install/INSTALL_CMD=install/' $out/lib/icu/*/pkgdata.inc '' + ( let replacements = [ { from = "\${prefix}/include"; to = "${placeholder "dev"}/include"; } # --cppflags-searchpath { from = "\${pkglibdir}/Makefile.inc"; to = "${placeholder "dev"}/lib/icu/Makefile.inc"; } # --incfile { from = "\${pkglibdir}/pkgdata.inc"; to = "${placeholder "dev"}/lib/icu/pkgdata.inc"; } # --incpkgdatafile ]; in '' rm $out/share/icu/*/install-sh $out/share/icu/*/mkinstalldirs # Avoid having a runtime dependency on bash substituteInPlace "$dev/bin/icu-config" \ ${lib.concatMapStringsSep " " (r: "--replace-fail '${r.from}' '${r.to}'") replacements} '' # Create library with everything reexported to provide the same ABI as the system ICU. + lib.optionalString stdenv.hostPlatform.isDarwin ( if stdenv.hostPlatform.isStatic then '' ${stdenv.cc.targetPrefix}ar qL "$out/lib/libicucore.a" \ "$out/lib/libicuuc.a" \ "$out/lib/libicudata.a" \ "$out/lib/libicui18n.a" \ "$out/lib/libicuio.a" '' else '' icuVersion=$(basename "$out/share/icu/"*) ${stdenv.cc.targetPrefix}clang -dynamiclib \ -L "$out/lib" \ -Wl,-reexport-licuuc \ -Wl,-reexport-licudata \ -Wl,-reexport-licui18n \ -Wl,-reexport-licuio \ -compatibility_version 1 \ -current_version "$icuVersion" \ -install_name "$out/lib/libicucore.A.dylib" \ -o "$out/lib/libicucore.A.dylib" ln -s libicucore.A.dylib "$out/lib/libicucore.dylib" '' ) ); postFixup = ''moveToOutput lib/icu "$dev" ''; doCheck = stdenv.buildPlatform.canExecute stdenv.hostPlatform; nativeCheckInputs = [ python3 ]; # Some tests use `log(name)`, which clang identifies as potentially insecure. checkFlags = [ "CFLAGS+=-Wno-format-security" "CXXFLAGS+=-Wno-format-security" ]; checkTarget = "check"; }; buildRootOnlyAttrs = self: super: { pname = "ICU-build-root"; preConfigure = super.preConfigure + '' mkdir build cd build configureScript=../configure # Apple’s customizations require building and linking additional files, which are handled via `Makefile.local`. # These need copied into the build environment to avoid link errors from not building them. mkdir common i18n cp ../common/Makefile.local common/Makefile.local cp ../i18n/Makefile.local i18n/Makefile.local ''; postBuild = '' cd .. mv build $out echo "Doing build-root only, exiting now" >&2 exit 0 ''; }; mkWithAttrs = attrs: mkAppleDerivation (lib.extends attrs baseAttrs); in mkWithAttrs realAttrs