meson setup finds an old NASM version that it doesn't accommodate

[seishun]

Describe the bug

https://nasm.us/doc/nasmdoc2.html

2.1.18 The -i Option: Include File Search Directories

<...>

Prior NASM 2.14 a path provided in the option has been considered as a verbatim copy and providing a path separator been up to a caller. One could implicitly concatenate a search path together with a filename. Still this was rather a trick than something useful. Now the trailing path separator is made to always present, thus -ifoo will be considered as the -ifoo/ directory.

Meson doesn't add a trailing path separator even if it finds a NASM version older than 2.14. As a result, .asm files that include other files fail to build:

[1/2] Compiling Nasm object hello.exe.p/hello.asm.obj
FAILED: hello.exe.p/hello.asm.obj
"C:\Program Files\NASM\nasm.EXE" "-f" "win64" "-DWIN64" "-D__x86_64__" "-O0" "-g" "-I..\included" "-I.." "-I." "-Ihello.exe.p" -MD "hello.exe.p\hello.asm.obj.d" -MQ hello.exe.p/hello.asm.obj -o hello.exe.p/hello.asm.obj ../hello.asm
../hello.asm:5: fatal: unable to open include file `included.asm'
ninja: build stopped: subcommand failed.

To Reproduce

meson.build

project('test', 'nasm')

inc = include_directories('included')

exe = executable('hello', 'hello.asm', include_directories: inc)
test('hello', exe)

hello.asm

section .text
    global main
    extern ExitProcess

%include "included.asm"

main:
    ; Exit
    xor rcx, rcx        ; status: 0
    call ExitProcess

included/included.asm can be empty.

Expected behavior
Meson ignores NASM versions that it doesn't accommodate.

system parameters

• Windows 10
• meson 1.6.1
• ninja 1.12.1