mac: segfault with bare main when compiling with `tcc`

[rilaaax]

Describe the bug

An empty main() compiled with tcc generates a binary that triggers a segfault.

Notes

1. Adding -g or -gc boehm flag does prevent any error
2. Adding -cg flag triggers bus error

Reproduction Steps

fn main() {
}

v -cc tcc .
./<bin>

Expected Behavior

success

Current Behavior

segmentation fault

Possible Solution

No response

Additional Information/Context

No response

V version

0.5.2 a5a89d5

Environment details (OS name and version, etc.)

V full version	V 0.5.2 76f77e3.a5a89d5
OS	macos, macOS, 27.0, 26A5388g
V git status	0.5.2-210-ga5a89d56
cc version	Apple clang version 21.0.0 (clang-2100.1.1.101)
gcc version	Apple clang version 21.0.0 (clang-2100.1.1.101)
clang version	Apple clang version 21.0.0 (clang-2100.1.1.101)
tcc version	tcc version 0.9.28rc 2026-07-24 HEAD@85ba3ae8 (AArch64 Darwin)
tcc git status	thirdparty-macos-arm64 274abd24
emcc version	N/A
glibc version	N/A

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[JalonSolov]

Works as expected on Linux:

$ cat x.v
fn main() {
}
$ v run x.v
$ v x.v
$ ./x
$ v -cc tcc x.v
$ ./x
$

[rilaaax]

@JalonSolov Thanks 🙏🏼

[quaesitor-scientiam]

Works fine on my Mac

gumpy@Richards-MacBook-Pro test % ./test
gumpy@Richards-MacBook-Pro test % v doctor
|V full version      |V 0.5.2 b0e03b2fd3851e754dd3568b19328e1651d964d3.282bf30
|:-------------------|:-------------------
|OS                  |macos, macOS, 26.5.2, 25F84
|Processor           |10 cpus, 64bit, little endian, Apple M5
|Memory              |4.24GB/32GB
|                    |
|V executable        |/Users/gumpy/repo/vlang/v
|V last modified time|2026-08-05 13:28:04
|                    |
|V home dir          |OK, value: /Users/gumpy/repo/vlang
|VMODULES            |OK, value: /Users/gumpy/.vmodules
|VTMP                |OK, value: /tmp/v_501
|Current working dir |OK, value: /Users/gumpy/repo/test
|                    |
|Git version         |git version 2.52.0
|V git status        |0.5.1-2406-g282bf303
|.git/config present |true
|                    |
|cc version          |Apple clang version 21.0.0 (clang-2100.1.1.101)
|gcc version         |Apple clang version 21.0.0 (clang-2100.1.1.101)
|clang version       |Apple clang version 21.0.0 (clang-2100.1.1.101)
|tcc version         |tcc version 0.9.28rc 2026-01-10 HEAD@5ec0e6f8 (AArch64 Darwin)
|tcc git status      |thirdparty-macos-arm64 f995efa3
|emcc version        |N/A
|glibc version       |N/A```

our `tcc` versions are different though