clang/test/Driver/program-path-priority.c

   1 /// Don't create symlinks on Windows
   2 // UNSUPPORTED: system-windows
   3
   4 /// Check the priority used when searching for tools
   5 /// Names and locations are usually in this order:
   6 /// <triple>-tool, tool, program path, PATH
   7 /// (from highest to lowest priority)
   8 /// A higher priority name found in a lower priority
   9 /// location will win over a lower priority name in a
  10 /// higher priority location.
  11 /// Prefix dirs (added with -B) override the location,
  12 /// so only name priority is accounted for, unless we fail to find
  13 /// anything at all in the prefix.
  14
  15 /// Note: All matches are expected to be at the end of file paths.
  16 /// So we match " on the end to account for build systems that
  17 /// put the name of the compiler in the build path.
  18 /// E.g. /build/gcc_X.Y.Z/0/...
  19
  20 /// Symlink clang to a new dir which will be its
  21 /// "program path" for these tests
  22 // RUN: rm -rf %t && mkdir -p %t
  23 // RUN: ln -s %clang %t/clang
  24
  25 /// No gccs at all, nothing is found
  26 // RUN: env "PATH=" %t/clang -### -target notreal-none-elf %s 2>&1 | \
  27 // RUN:   FileCheck --check-prefix=NO_NOTREAL_GCC %s
  28 // NO_NOTREAL_GCC-NOT: notreal-none-elf-gcc"
  29 /// Some systems will have "gcc-x.y.z" so for this first check
  30 /// make sure we don't find "gcc" or "gcc-x.y.z". If we do find either
  31 /// then there is no point continuing as this copy of clang is not
  32 /// isolated as we expected.
  33 // NO_NOTREAL_GCC-NOT: {{/gcc[^/]*"}}
  34
  35 /// <triple>-gcc in program path is found
  36 // RUN: touch %t/notreal-none-elf-gcc && chmod +x %t/notreal-none-elf-gcc
  37 // RUN: env "PATH=" %t/clang -### -target notreal-none-elf %s 2>&1 | \
  38 // RUN:   FileCheck --check-prefix=PROG_PATH_NOTREAL_GCC %s
  39 // PROG_PATH_NOTREAL_GCC: notreal-none-elf-gcc"
  40
  41 /// <triple>-gcc on the PATH is found
  42 // RUN: mkdir -p %t/env
  43 // RUN: rm %t/notreal-none-elf-gcc
  44 // RUN: touch %t/env/notreal-none-elf-gcc && chmod +x %t/env/notreal-none-elf-gcc
  45 // RUN: env "PATH=%t/env/" %t/clang -### -target notreal-none-elf %s 2>&1 | \
  46 // RUN:   FileCheck --check-prefix=ENV_PATH_NOTREAL_GCC %s
  47 // ENV_PATH_NOTREAL_GCC: env/notreal-none-elf-gcc"
  48
  49 /// <triple>-gcc in program path is preferred to one on the PATH
  50 // RUN: touch %t/notreal-none-elf-gcc && chmod +x %t/notreal-none-elf-gcc
  51 // RUN: env "PATH=%t/env/" %t/clang -### -target notreal-none-elf %s 2>&1 | \
  52 // RUN:   FileCheck --check-prefix=BOTH_NOTREAL_GCC %s
  53 // BOTH_NOTREAL_GCC: notreal-none-elf-gcc"
  54 // BOTH_NOTREAL_GCC-NOT: env/notreal-none-elf-gcc"
  55
  56 /// On program path, <triple>-gcc is preferred to plain gcc
  57 // RUN: touch %t/gcc && chmod +x %t/gcc
  58 // RUN: env "PATH=" %t/clang -### -target notreal-none-elf %s 2>&1 | \
  59 // RUN:   FileCheck --check-prefix=NOTREAL_GCC_PREFERRED %s
  60 // NOTREAL_GCC_PREFERRED: notreal-none-elf-gcc"
  61 // NOTREAL_GCC_PREFERRED-NOT: /gcc"
  62
  63 /// <triple>-gcc on the PATH is preferred to gcc in program path
  64 // RUN: rm %t/notreal-none-elf-gcc
  65 // RUN: env "PATH=%t/env/" %t/clang -### -target notreal-none-elf %s 2>&1 | \
  66 // RUN:   FileCheck --check-prefix=NOTREAL_PATH_OVER_GCC_PROG %s
  67 // NOTREAL_PATH_OVER_GCC_PROG: env/notreal-none-elf-gcc"
  68 // NOTREAL_PATH_OVER_GCC_PROG-NOT: /gcc"
  69
  70 /// <triple>-gcc on the PATH is preferred to gcc on the PATH
  71 // RUN: rm %t/gcc
  72 // RUN: touch %t/env/gcc && chmod +x %t/env/gcc
  73 // RUN: env "PATH=%t/env/" %t/clang -### -target notreal-none-elf %s 2>&1 | \
  74 // RUN:   FileCheck --check-prefix=NOTREAL_PATH_OVER_GCC_PATH %s
  75 // NOTREAL_PATH_OVER_GCC_PATH: env/notreal-none-elf-gcc"
  76 // NOTREAL_PATH_OVER_GCC_PATH-NOT: /gcc"
  77
  78 /// We cannot trust clang --version, or cmake's LLVM_DEFAULT_TARGET_TRIPLE
  79 /// to give us the one and only default triple.
  80 /// Can't trust cmake because on Darwin, triples have a verison appended to them.
  81 /// (and clang uses the versioned string to search)
  82 /// Can't trust --version because it will pad 3 item triples to 4 e.g.
  83 /// powerpc64le-linux-gnu -> powerpc64le-unknown-linux-gnu
  84 /// (and clang uses the former to search)
  85 /// So we write to both names which is a bit odd but still proves that the
  86 /// lookup is working.
  87
  88 /// <default-triple>-gcc has lowest priority so <triple>-gcc
  89 /// on PATH beats default triple in program path
  90 // RUN: DEFAULT_TRIPLE=`%t/clang --version | grep "Target:" | cut -d ' ' -f2`
  91 // RUN: touch %t/$DEFAULT_TRIPLE-gcc && chmod +x %t/$DEFAULT_TRIPLE-gcc
  92 // RUN: touch %t/%target_triple-gcc && chmod +x %t/%target_triple-gcc
  93 // RUN: env "PATH=%t/env/" %t/clang -### -target notreal-none-elf %s 2>&1 | \
  94 // RUN:   FileCheck --check-prefix=DEFAULT_TRIPLE_GCC %s
  95 // DEFAULT_TRIPLE_GCC: env/notreal-none-elf-gcc"
  96
  97 /// plain gcc on PATH beats default triple in program path
  98 // RUN: rm %t/env/notreal-none-elf-gcc
  99 // RUN: env "PATH=%t/env/" %t/clang -### -target notreal-none-elf %s 2>&1 | \
 100 // RUN:   FileCheck --check-prefix=DEFAULT_TRIPLE_NO_NOTREAL %s
 101 // DEFAULT_TRIPLE_NO_NOTREAL: env/gcc"
 102 // DEFAULT_TRIPLE_NO_NOTREAL-NOT: -gcc"
 103
 104 /// Pick "gcc" as a fallback. Don't pick $DEFAULT_TRIPLE-gcc.
 105 // RUN: rm %t/env/gcc
 106 // RUN: env "PATH=%t/env/" %t/clang -### -target notreal-none-elf %s 2>&1 | \
 107 // RUN:   FileCheck --check-prefix=DEFAULT_TRIPLE_NO_OTHERS %s
 108 // DEFAULT_TRIPLE_NO_OTHERS: "gcc"
 109
 110 /// -B paths are searched separately so default triple will win
 111 /// if put in one of those even if other paths have higher priority names
 112 // RUN: mkdir -p %t/prefix
 113 /// One of these will fail when $DEFAULT_TRIPLE == %target_triple
 114 // RUN: test -f %t/$DEFAULT_TRIPLE-gcc && \
 115 // RUN:   mv %t/$DEFAULT_TRIPLE-gcc %t/prefix || true
 116 // RUN: test -f %t/%target_triple-gcc && \
 117 // RUN:   mv %t/%target_triple-gcc %t/prefix || true
 118 // RUN: touch %t/notreal-none-elf-gcc && chmod +x %t/notreal-none-elf-gcc
 119 // RUN: touch %t/prefix/gcc && chmod +x %t/prefix/gcc
 120 // RUN: env "PATH=" %t/clang -### -target notreal-none-elf %s -B %t/prefix 2>&1 | \
 121 // RUN:   FileCheck --check-prefix=DEFAULT_TRIPLE_IN_PREFIX %s
 122 // DEFAULT_TRIPLE_IN_PREFIX: prefix/gcc"
 123 // DEFAULT_TRIPLE_IN_PREFIX-NOT: notreal-none-elf-gcc"
 124
 125 /// Only if there is nothing in the prefix will we search other paths
 126 /// -f in case $DEFAULT_TRIPLE == %target_triple
 127 // RUN: rm -f %t/prefix/$DEFAULT_TRIPLE-gcc %t/prefix/%target_triple-gcc %t/prefix/gcc
 128 // RUN: env "PATH=" %t/clang -### -target notreal-none-elf %s -B %t/prefix 2>&1 | \
 129 // RUN:   FileCheck --check-prefix=EMPTY_PREFIX_DIR %s
 130 // EMPTY_PREFIX_DIR: notreal-none-elf-gcc"