How to make builtin rule to accept unknown file extension?

[doongjohn]

I want to build assembly files with the extension .nasm (because I want to use nasm syntax highlighting)
but xmake only accepts these ".s", ".S" ".asm" as an assembly file

I tried these but both failed

target("asm")
  set_kind("binary")
  add_files("src/*.nasm", {rule = "as"})
  set_toolset("as", "nasm")
  set_toolset("ld", "clang")

target("asm")
  set_kind("binary")
  add_files("src/*.nasm", {sourcekind= "as"})
  set_toolset("as", "nasm")
  set_toolset("ld", "clang")

Is there any way to make this work without making a custom rule?

[waruqi]

no way now.

[doongjohn]

ok thanks!
do you have any plan to add this kind of feature?

[waruqi]

maybe, you can open a feature request first.

[Freed-Wu]

Temporarily, you can use add_configfiles():

xmake.lua:

add_rules("mode.debug", "mode.release")

target("main")
do
    set_kind("binary")
    add_ldflags("-nostdlib")
    add_configfiles("src/main.nasm", {filename = "main.asm"})
    add_files("$(buildir)/main.asm")
    set_toolchains("nasm")
end

src/main.nasm:

GLOBAL _start

[SECTION .TEXT]
_start:
    MOV EAX, 4          ; write
    MOV EBX, 1          ; stdout
    MOV ECX, msg
    MOV EDX, len
    INT 0x80            ; write(stdout, msg, len)

    MOV EAX, 1          ; exit
    MOV EBX, 0
    INT 0x80            ; exit(0)

[SECTION .DATA]
    msg: DB  "Hello, world!", 10
    len: EQU $-msg

$ xmake f -a i386
$ xmake
$ xmake run
Hello, world!