clang/test/Driver/diagnostics.c

   1 // Parse diagnostic arguments in the driver
   2
   3 // Exactly which arguments are warned about and which aren't differ based
   4 // on what target is selected. -stdlib= and -fuse-ld= emit diagnostics when
   5 // compiling C code, for e.g. *-linux-gnu. Linker inputs, like -lfoo, emit
   6 // diagnostics when only compiling for all targets.
   7
   8 // This is normally a non-fatal warning:
   9 // RUN: %clang --target=x86_64-apple-darwin11 \
  10 // RUN:   -fsyntax-only -lfoo %s 2>&1 | FileCheck %s
  11
  12 // Either with a specific -Werror=unused.. or a blanket -Werror, this
  13 // causes the command to fail.
  14 // RUN: not %clang --target=x86_64-apple-darwin11 \
  15 // RUN:   -fsyntax-only -lfoo \
  16 // RUN:   -Werror=unused-command-line-argument %s 2>&1 | FileCheck %s
  17
  18 // RUN: not %clang --target=x86_64-apple-darwin11 \
  19 // RUN:   -fsyntax-only -lfoo -Werror %s 2>&1 | FileCheck %s
  20
  21 // With a specific -Wno-..., no diagnostic should be printed.
  22 // RUN: %clang --target=x86_64-apple-darwin11 \
  23 // RUN:   -fsyntax-only -lfoo -Werror \
  24 // RUN:   -Wno-unused-command-line-argument %s 2>&1 | count 0
  25
  26 // With -Qunused-arguments, no diagnostic should be printed.
  27 // RUN: %clang --target=x86_64-apple-darwin11 \
  28 // RUN:   -fsyntax-only -lfoo -Werror \
  29 // RUN:   -Qunused-arguments %s 2>&1 | count 0
  30
  31 // With the argument enclosed in --{start,end}-no-unused-arguments,
  32 // there's no diagnostic.
  33 // RUN: %clang --target=x86_64-apple-darwin11 -fsyntax-only \
  34 // RUN:   --start-no-unused-arguments -lfoo --end-no-unused-arguments \
  35 // RUN:   -Werror %s 2>&1 | count 0
  36
  37 // With --{start,end}-no-unused-argument around a different argument, it
  38 // still warns about the unused argument.
  39 // RUN: not %clang --target=x86_64-apple-darwin11 \
  40 // RUN:   --start-no-unused-arguments -fsyntax-only --end-no-unused-arguments \
  41 // RUN:   -lfoo -Werror %s 2>&1 | FileCheck %s
  42
  43 // Test clang-cl warning about unused linker options.
  44 // RUN: not %clang_cl -fsyntax-only /WX \
  45 // RUN:   -LD -- %s 2>&1 | FileCheck %s --check-prefix=CL-WARNING
  46
  47 // Test clang-cl ignoring the warning with --start-no-unused-arguments.
  48 // RUN: %clang_cl -fsyntax-only /WX \
  49 // RUN:   --start-no-unused-arguments /LD --end-no-unused-arguments -- %s 2>&1 | count 0
  50
  51 // CHECK: -lfoo: 'linker' input unused
  52
  53 // CL-WARNING: argument unused during compilation: '-LD'