According to [Nim Backend
Integration,](https://nim-lang.org/docs/backends.html#interfacing-backend-code-calling-nim)
I have the following code
type Vec3t {.exportc.} = object
x, y, z: float32
proc test_add(x, y, z: float32): Vec3t {.exportc.} =
Vec3t(x: x, y: y, z: z)
proc print_point_nim(p: Vec3t) {.exportc.} =
echo "[Nim] p.x: ", p.x
Run
compiled with
nim c -d:release -d:danger --gc:refc --noMain --noLinking --nimcache:ncache
--header:TEST.H TEST.NIM
Run
However, when called in C there are linker errors like
/usr/bin/ld: /tmp/ccXiaS2r.o: in function `main':
LIGHT.C:(.text+0x148): undefined reference to `NimMain()'
LIGHT.C:(.text.startup+0x52): undefined reference to `test_add(float,
float, float)'
/usr/bin/ld: light: hidden symbol `_Z8test_addfff' isn't defined
/usr/bin/ld: final link failed: bad value
collect2: error: ld returned 1 exit status
Run
Tried with `nim cpp` instead with `nim c` and it compiles, but whenever the
function is called it drops segfault.
It works on test project, but if I can't integrate it into existing C
application.
Are there any specific compiler switches to overcome this?
Also, why even with the `--header` flag Nim still produces object files?
Shouldn't it compile only the .c sources, and then compile them in the next
stage with gcc?
