[llvm] [libc][bazel] add targets to build the scanf family (PR #128082)

[Michael Jones via llvm-commits]

================
@@ -4611,6 +4611,178 @@ libc_function(
     ],
 )
 
+libc_support_library(
+    name = "scanf_config",
+    hdrs = ["src/stdio/scanf_core/scanf_config.h"],
+    deps = [
+    ],
+)
+
+libc_support_library(
+    name = "scanf_core_structs",
+    hdrs = ["src/stdio/scanf_core/core_structs.h"],
+    deps = [
+        ":__support_cpp_bitset",
+        ":__support_cpp_string_view",
+        ":__support_fputil_fp_bits",
+        ":scanf_config",
+    ],
+)
+
+libc_support_library(
+    name = "scanf_parser",
+    hdrs = ["src/stdio/scanf_core/parser.h"],
+    deps = [
+        ":__support_arg_list",
+        ":__support_cpp_bitset",
+        ":__support_ctype_utils",
+        ":__support_str_to_integer",
+        ":scanf_config",
+        ":scanf_core_structs",
+    ],
+)
+
+libc_support_library(
+    name = "scanf_reader",
+    hdrs = ["src/stdio/scanf_core/reader.h"],
+    deps = [
+        ":__support_cpp_string_view",
+        ":__support_macros_attributes",
+        ":types_FILE",
+    ],
+)
+
+libc_support_library(
+    name = "scanf_converter",
+    srcs = [
+        "src/stdio/scanf_core/converter.cpp",
+        "src/stdio/scanf_core/float_converter.cpp",
+        "src/stdio/scanf_core/int_converter.cpp",
+        "src/stdio/scanf_core/ptr_converter.cpp",
+        "src/stdio/scanf_core/string_converter.cpp",
+    ],
+    hdrs = [
+        "src/stdio/scanf_core/converter.h",
+        "src/stdio/scanf_core/converter_utils.h",
----------------
michaelrj-google wrote:

Interesting, I didn't know that internal headers were handled differently from the interface headers.

https://github.com/llvm/llvm-project/pull/128082