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' 54