https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=271475
--- Comment #4 from Jan Beich <jbe...@freebsd.org> ---
(In reply to Marcin Cieślak from comment #3)
${CC} is your assembler when using Clang (-integrated-as is enabled by
default). Unlike GCC it doesn't call an external program and can compile *.s
(GNU assembly syntax) directly.
Symlinking "as" to clang unlikely to work due to incompatible CLI options.
Invoking Clang assembler directly is possible but discouraged.
$ cc -cc1as -help
OVERVIEW: Clang Integrated Assembler
USAGE: clang -cc1as [options] file...
OPTIONS:
-as-secure-log-file <value>
Emit .secure_log_unique directives to this filename.
-compress-debug-sections=<value>
DWARF debug sections compression type
-darwin-target-variant-sdk-version=<value>
The version of darwin target variant SDK used for
compilation
-darwin-target-variant-triple <value>
Specify the darwin target variant triple
-debug-info-macro Emit macro debug information
-default-function-attr <value>
Apply given attribute to all functions
-defsym <value> Define a value for a symbol
-dwarf-debug-flags <value>
The string to embed in the Dwarf debug flags record.
-dwarf-debug-producer <value>
The string to embed in the Dwarf debug AT_producer
record.
-fbasic-block-sections=<value>
Place each function's basic blocks in unique sections
(ELF Only)
-fcoverage-compilation-dir=<value>
The compilation directory to embed in the coverage
mapping.
-fdebug-compilation-dir=<value>
The compilation directory to embed in the debug info
-fdebug-prefix-map=<old>=<new>
For paths in debug info, remap directory <old> to
<new>. If multiple options match a path, the last option wins
-fembed-bitcode=<option>
Embed LLVM bitcode
-femit-compact-unwind-non-canonical
Try emitting Compact-Unwind for non-canonical
entries. Maybe overriden by other constraints
-femit-dwarf-unwind=<value>
When to emit DWARF unwind (EH frame) info
-filetype <value> Specify the output file type ('asm', 'null', or
'obj')
-fno-math-builtin Disable implicit builtin knowledge of math functions
-fno-use-ctor-homing Don't use constructor homing for debug info
-fswift-async-fp=<option>
Control emission of Swift async extended frame info
-fuse-ctor-homing Use constructor homing if we are using limited debug
info already
-gcodeview Generate CodeView debug information
-gdwarf32 Enables DWARF32 format for ELF binaries, if debug
information emission is enabled.
-gdwarf64 Enables DWARF64 format for ELF binaries, if debug
information emission is enabled.
-help Display available options
-I <dir> Add directory to the end of the list of include
search paths
-main-file-name <value> Main file name to use for debug info and source if
missing
-massembler-fatal-warnings
Make assembler warnings fatal
-massembler-no-warn Make assembler not emit warnings
-mincremental-linker-compatible
(integrated-as) Emit an object file which can be used
with an incremental linker
-mllvm <value> Additional arguments to forward to LLVM's option
processing
-mno-type-check Don't perform type checking of the assembly code
(wasm only)
-mnoexecstack Mark the file as not needing an executable stack
-mrelax-all (integrated-as) Relax all machine instructions
-mrelax-relocations=no Disable x86 relax relocations
-mrelocation-model <value>
The relocation model to use
-msave-temp-labels Save temporary labels in the symbol table. Note this
may change .s semantics and shouldn't generally be used on compiler-generated
code.
-n Don't automatically start assembly file with a text
section
-object-file-name=<file>
Set the output <file> for debug infos
-output-asm-variant <value>
Select the asm variant index to use for output
-o <file> Write output to <file>
-record-command-line <value>
The string to embed in the .LLVM.command.line
section.
-show-encoding Show instruction encoding information in
transliterate mode
-show-inst Show internal instruction representation in
transliterate mode
-split-dwarf-output <value>
File name to use for split dwarf debug info output
-target-abi <value> Target a particular ABI type
-target-cpu <value> Target a specific cpu type
-target-feature <value> Target specific attributes
-target-sdk-version=<value>
The version of target SDK used for compilation
-triple <value> Specify target triple (e.g. i686-apple-darwin9)
-tune-cpu <value> Tune for a specific cpu type
-version Print the compiler version
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