[bug] meson for TI c6000 compile incorrect file

[Freed-Wu]

Describe the bug

meson support for TI C6000 is incorrect

To Reproduce

Download ti_cgt_c6000_7.4.24_linux_installer_x86.bin

#include <stdio.h>
#include <stdlib.h>
int main(int argc, char *argv[]) {
  printf("1 = %d\n", 1);
  return EXIT_SUCCESS;
}

project('demo', 'c', version: '0.0.1')

executable('main', 'main.c')

# Cross file tested on Texas Instruments C6000 compiler (bare metal DSP devices)
# This file assumes that path to the Texas Instruments C6000 toolchain is added
# to the environment(PATH) variable.

[host_machine]
system = 'c6000'
cpu_family = 'c6000'
cpu = 'c64x'
endian = 'little'

[binaries]
c = 'cl6x'
cpp = 'cl6x'
ar = 'ar6x'
strip = 'strip6x'
nm = 'nm6x'
as = 'asm6x'

[properties]
needs_exe_wrapper = true
has_function_printf = true
bits = 32

# https://github.com/mesonbuild/meson/blob/master/cross/ti-c6000.txt

$ meson setup --cross=ti-c6000.txt build
$ meson compile -Cbuild --verbose
[2/2] Linking target main.out
<Linking>
[1/2] cl6x -I=main.out.p -I=. -I=.. -O0 -g --preproc_with_compile --preproc_dependency=main.out.p/main.c.o.d --output_file=main.out.p/main.c.o ../main.c
[2/2] cl6x  -z --output_file=main.out main.out.p/main.c.o
warning: no suitable entry-point found; setting to 0
$ ls -al build/main.out
Permissions Size User Date Modified Name
.rw-r--r--  3.2k wzy   9 Dec 19:41   build/main.out

Expected behavior

$ cl6x main.c -z
<Linking>
$ ls -al a.out
Permissions Size User Date Modified Name
.rw-r--r--  159k wzy   9 Dec 19:36   a.out

File size should be correct.

system parameters

• Is a cross build
• what operating system NixOS
• what Python version are you using e.g. 3.12.7
• what meson --version 1.6.0
• what ninja --version 1.12.1

[Freed-Wu]

BTW,

$ cl6x -h
...
--include_path,-I=dir        Add dir to #include search path

In fact, -Idir can also work, and be helpful to fix clangd/clangd#2249

[Freed-Wu]

The bug is because

https://e2e.ti.com/support/tools/code-composer-studio-group/ccs/f/code-composer-studio-forum/518163/warning-no-suitable-entry-point-found-setting-to-0

When linking C or C++ code, you must use the linker option --rom_model or --ram_model

If user don't set any --XXX_model, we must have a default.