gn analyze output:
{
  "compile_targets": [],
  "status": "No dependency",
  "test_targets": []
}
gn analyze input:
{
  "files": [
    "//libc/shared/math.h",
    "//libc/shared/math/fmul.h",
    "//libc/shared/math/fmulf128.h",
    "//libc/shared/math/fmull.h",
    "//libc/shared/math/frexp.h",
    "//libc/shared/math/frexpbf16.h",
    "//libc/shared/math/frexpl.h",
    "//libc/shared/math/fsub.h",
    "//libc/shared/math/fsubf128.h",
    "//libc/shared/math/fsubl.h",
    "//libc/src/__support/FPUtil/double_double.h",
    "//libc/src/__support/math/CMakeLists.txt",
    "//libc/src/__support/math/fmul.h",
    "//libc/src/__support/math/fmulf128.h",
    "//libc/src/__support/math/fmull.h",
    "//libc/src/__support/math/frexp.h",
    "//libc/src/__support/math/frexpbf16.h",
    "//libc/src/__support/math/frexpl.h",
    "//libc/src/__support/math/fsub.h",
    "//libc/src/__support/math/fsubf128.h",
    "//libc/src/__support/math/fsubl.h",
    "//libc/src/math/generic/CMakeLists.txt",
    "//libc/src/math/generic/fmul.cpp",
    "//libc/src/math/generic/fmulf128.cpp",
    "//libc/src/math/generic/fmull.cpp",
    "//libc/src/math/generic/frexp.cpp",
    "//libc/src/math/generic/frexpbf16.cpp",
    "//libc/src/math/generic/frexpl.cpp",
    "//libc/src/math/generic/fsub.cpp",
    "//libc/src/math/generic/fsubf128.cpp",
    "//libc/src/math/generic/fsubl.cpp",
    "//libc/test/shared/CMakeLists.txt",
    "//libc/test/shared/shared_math_constexpr_test.cpp",
    "//libc/test/shared/shared_math_test.cpp",
    "//utils/bazel/llvm-project-overlay/libc/BUILD.bazel"
  ],
  "test_targets": [
    "//clang-tools-extra/clangd/test:check-clangd",
    "//clang-tools-extra/test:check-clang-tools",
    "//clang/test:check-clang",
    "//compiler-rt/test/hwasan:check-hwasan",
    "//lld/test:check-lld",
    "//llvm/test:check-llvm"
  ],
  "additional_compile_targets": []
}
running all tests due to change to blacklisted file