about summary refs log tree commit diff
path: root/pkgs/development/compilers/llvm/common/clang/default.nix
blob: 2373795b49fd89b6aa6bf9a48588e755a5f44ca8 (plain) (blame)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
{ lib
, stdenv
, llvm_meta
, patches ? []
, src ? null
, monorepoSrc ? null
, runCommand
, substituteAll
, cmake
, ninja
, libxml2
, libllvm
, release_version
, version
, python3
, buildLlvmTools
, fixDarwinDylibNames
, enableManpages ? false
, clang-tools-extra_src ? null
}:

let
  pname = "clang";

  src' = if monorepoSrc != null then
    runCommand "${pname}-src-${version}" {} ''
      mkdir -p "$out"
      cp -r ${monorepoSrc}/cmake "$out"
      cp -r ${monorepoSrc}/${pname} "$out"
      cp -r ${monorepoSrc}/clang-tools-extra "$out"
    '' else src;

  self = stdenv.mkDerivation (finalAttrs: rec {
    inherit pname version patches;

    src = src';

    sourceRoot = if lib.versionOlder release_version "13" then null
      else "${src.name}/${pname}";

    nativeBuildInputs = [ cmake ]
      ++ (lib.optional (lib.versionAtLeast release_version "15") ninja)
      ++ [ python3 ]
      ++ lib.optional (lib.versionAtLeast version "18" && enableManpages) python3.pkgs.myst-parser
      ++ lib.optional enableManpages python3.pkgs.sphinx
      ++ lib.optional stdenv.hostPlatform.isDarwin fixDarwinDylibNames;

    buildInputs = [ libxml2 libllvm ];

    cmakeFlags = (lib.optionals (lib.versionAtLeast release_version "15") [
      "-DCLANG_INSTALL_PACKAGE_DIR=${placeholder "dev"}/lib/cmake/clang"
    ]) ++ [
      "-DCLANGD_BUILD_XPC=OFF"
      "-DLLVM_ENABLE_RTTI=ON"
    ] ++ lib.optionals (lib.versionAtLeast release_version "17") [
      "-DLLVM_INCLUDE_TESTS=OFF"
    ] ++ lib.optionals enableManpages [
      "-DCLANG_INCLUDE_DOCS=ON"
      "-DLLVM_ENABLE_SPHINX=ON"
      "-DSPHINX_OUTPUT_MAN=ON"
      "-DSPHINX_OUTPUT_HTML=OFF"
      "-DSPHINX_WARNINGS_AS_ERRORS=OFF"
    ] ++ lib.optionals (stdenv.hostPlatform != stdenv.buildPlatform) ([
      "-DLLVM_TABLEGEN_EXE=${buildLlvmTools.llvm}/bin/llvm-tblgen"
      "-DCLANG_TABLEGEN=${buildLlvmTools.libclang.dev}/bin/clang-tblgen"
    ] ++ lib.optionals (lib.versionAtLeast release_version "15") [
      # Added in LLVM15:
      # `clang-tidy-confusable-chars-gen`: https://github.com/llvm/llvm-project/commit/c3574ef739fbfcc59d405985a3a4fa6f4619ecdb
      # `clang-pseudo-gen`: https://github.com/llvm/llvm-project/commit/cd2292ef824591cc34cc299910a3098545c840c7
      "-DCLANG_TIDY_CONFUSABLE_CHARS_GEN=${buildLlvmTools.libclang.dev}/bin/clang-tidy-confusable-chars-gen"
      "-DCLANG_PSEUDO_GEN=${buildLlvmTools.libclang.dev}/bin/clang-pseudo-gen"
    ]);

    postPatch = (if lib.versionOlder release_version "13" then ''
      sed -i -e 's/DriverArgs.hasArg(options::OPT_nostdlibinc)/true/' \
             -e 's/Args.hasArg(options::OPT_nostdlibinc)/true/' \
             lib/Driver/ToolChains/*.cpp
    '' else ''
      (cd tools && ln -s ../../clang-tools-extra extra)
    '') + lib.optionalString stdenv.hostPlatform.isMusl ''
      sed -i -e 's/lgcc_s/lgcc_eh/' lib/Driver/ToolChains/*.cpp
    '';

    outputs = [ "out" "lib" "dev" "python" ];

    postInstall = ''
      ln -sv $out/bin/clang $out/bin/cpp
    '' + (lib.optionalString (lib.versions.major release_version == "17") ''

      mkdir -p $lib/lib/clang
      mv $lib/lib/17 $lib/lib/clang/17
    '') + ''

      # Move libclang to 'lib' output
      moveToOutput "lib/libclang.*" "$lib"
      moveToOutput "lib/libclang-cpp.*" "$lib"
    '' + (if lib.versionOlder release_version "15" then ''
      substituteInPlace $out/lib/cmake/clang/ClangTargets-release.cmake \
          --replace "\''${_IMPORT_PREFIX}/lib/libclang." "$lib/lib/libclang." \
          --replace "\''${_IMPORT_PREFIX}/lib/libclang-cpp." "$lib/lib/libclang-cpp."
    '' else ''
      substituteInPlace $dev/lib/cmake/clang/ClangTargets-release.cmake \
          --replace "\''${_IMPORT_PREFIX}/lib/libclang." "$lib/lib/libclang." \
          --replace "\''${_IMPORT_PREFIX}/lib/libclang-cpp." "$lib/lib/libclang-cpp."
    '') + ''

    '' + (if lib.versionOlder release_version "15" then ''
      mkdir -p $python/bin $python/share/{clang,scan-view}
    '' else ''
      mkdir -p $python/bin $python/share/clang/
    '') + ''
      mv $out/bin/{git-clang-format,scan-view} $python/bin
      if [ -e $out/bin/set-xcode-analyzer ]; then
        mv $out/bin/set-xcode-analyzer $python/bin
      fi
      mv $out/share/clang/*.py $python/share/clang
    '' + (lib.optionalString (lib.versionOlder release_version "15") ''
      mv $out/share/scan-view/*.py $python/share/scan-view
    '') + ''
      rm $out/bin/c-index-test
      patchShebangs $python/bin

      mkdir -p $dev/bin
    '' + (if lib.versionOlder release_version "15" then ''
      cp bin/clang-tblgen $dev/bin
    '' else ''
      cp bin/{clang-tblgen,clang-tidy-confusable-chars-gen,clang-pseudo-gen} $dev/bin
    '');

    passthru = {
      inherit libllvm;
      isClang = true;
    } // (lib.optionalAttrs (lib.versionAtLeast release_version "15") {
      hardeningUnsupportedFlags = [
        "fortify3"
      ];
      hardeningUnsupportedFlagsByTargetPlatform = targetPlatform:
        lib.optional (!(targetPlatform.isx86_64 || targetPlatform.isAarch64)) "zerocallusedregs"
        ++ (finalAttrs.passthru.hardeningUnsupportedFlags or []);
    }) // (lib.optionalAttrs (lib.versionOlder release_version "15") {
      hardeningUnsupportedFlags = [ "fortify3" "zerocallusedregs" ];
    });

    meta = llvm_meta // {
      homepage = "https://clang.llvm.org/";
      description = "A C language family frontend for LLVM";
      longDescription = ''
        The Clang project provides a language front-end and tooling
        infrastructure for languages in the C language family (C, C++, Objective
        C/C++, OpenCL, CUDA, and RenderScript) for the LLVM project.
        It aims to deliver amazingly fast compiles, extremely useful error and
        warning messages and to provide a platform for building great source
        level tools. The Clang Static Analyzer and clang-tidy are tools that
        automatically find bugs in your code, and are great examples of the sort
        of tools that can be built using the Clang frontend as a library to
        parse C/C++ code.
      '';
      mainProgram = "clang";
    };
  } // lib.optionalAttrs enableManpages ({
    pname = "clang-manpages";

    installPhase = ''
      mkdir -p $out/share/man/man1
      # Manually install clang manpage
      cp docs/man/*.1 $out/share/man/man1/
    '';

    outputs = [ "out" ];

    doCheck = false;

    meta = llvm_meta // {
      description = "man page for Clang ${version}";
    };
  } // (if lib.versionOlder release_version "15" then {
    buildPhase = ''
      make docs-clang-man
    '';
  } else {
    ninjaFlags = [ "docs-clang-man" ];
  })) // (lib.optionalAttrs (clang-tools-extra_src != null) { inherit clang-tools-extra_src; })
    // (lib.optionalAttrs (lib.versionOlder release_version "13") {
      unpackPhase = ''
        unpackFile $src
        mv clang-* clang
        sourceRoot=$PWD/clang
        unpackFile ${clang-tools-extra_src}
        mv clang-tools-extra-* $sourceRoot/tools/extra
        substituteInPlace $sourceRoot/tools/extra/clangd/quality/CompletionModel.cmake \
          --replace ' ''${CMAKE_SOURCE_DIR}/../clang-tools-extra' ' ''${CMAKE_SOURCE_DIR}/tools/extra'
      '';
    })
  // (lib.optionalAttrs (lib.versionAtLeast release_version "15") {
    env = lib.optionalAttrs (stdenv.buildPlatform != stdenv.hostPlatform) {
      # The following warning is triggered with (at least) gcc >=
      # 12, but appears to occur only for cross compiles.
      NIX_CFLAGS_COMPILE = "-Wno-maybe-uninitialized";
    };
  }));
in self