Minimal example to reproduce error for parsing 'arr[]' in function typedefs in CBinding.jl

example.c

# include <stdio.h>
# include <example.h>

void example_print_array(int n, int *a) {
    for (int i = 0; i < n; ++i) {
        printf("a[%d] = %d\n", i, a[i]);
    }
}

void example_run_callback(example_callback_t callback) {
    const int n = 4;
    int a[n];

    a[0] = 11;
    a[1] = 22;
    a[2] = 33;
    a[3] = 44;

    callback(n,a);
}

example.h

# ifndef EXAMPLE_H
# define EXAMPLE_H

/* This gives error in CBinding.jl: */
typedef void (*example_callback_t)(int n, int a[]);

/* This works with CBinding.jl: */
/*
typedef void (*example_callback_t)(int n, int *a);
*/

/* This works with CBinding.jl: */
void example_print_array(int n, int a[]);

void example_run_callback(example_callback_t callback);

# endif

example.jl

using CBinding;

c`
    -Wall
    -Werror
    -I.
    -L. -lexample`

c"""
# include <example.h>
"""

a = Vector{Int32}([11,22,33,44])
n = length(a)

println("# example_print_array #");
c"example_print_array"(n,a)

function callback(n,a)
    for i = 1:n
        println("a[$i] = ", a[i])
    end
end

println("# example_run_callback #");
c"example_run_callback"(callback)

main.c

# include <stdio.h>
# include <example.h>

void callback(int n, int a[]) {
    for (int i = 0; i < n; ++i) {
        printf("a[%d] = %d\n",i,a[i]);
    }
}

int main(int argc, char **argv) {

    const int n = 4;
    int a[n];

    a[0] = 11;
    a[1] = 22;
    a[2] = 33;
    a[3] = 44;

    printf("# example_print_array #\n");
    example_print_array(n,a);

    printf("# example_run_callback #\n");
    example_run_callback(callback);

    return 0;
}

Makefile

CC = gcc

CCFLAGS = -I.
LDFLAGS = -L.

all: main libexample.so

main: main.c example.o
	$(CC) -o $@ -Wall -Werror $(CCFLAGS) $^

example.o: example.c
	$(CC) -c -Wall -Werror -fPIC $(CCFLAGS) $<

libexample.so: example.o
	$(CC) -shared $(CCFLAGS) -o $@ $<

Manifest.toml

# This file is machine-generated - editing it directly is not advised

julia_version = "1.7.2"
manifest_format = "2.0"

[[deps.ArgTools]]
uuid = "0dad84c5-d112-42e6-8d28-ef12dabb789f"

[[deps.Artifacts]]
uuid = "56f22d72-fd6d-98f1-02f0-08ddc0907c33"

[[deps.Base64]]
uuid = "2a0f44e3-6c83-55bd-87e4-b1978d98bd5f"

[[deps.CBinding]]
deps = ["Clang_jll", "Libdl", "Markdown", "Scratch"]
git-tree-sha1 = "9b5b4bb2e6debc86998e1d3862ee60dd3b5b5965"
uuid = "d43a6710-96b8-4a2d-833c-c424785e5374"
version = "1.0.8"

[[deps.Clang_jll]]
deps = ["Artifacts", "JLLWrappers", "Libdl", "Pkg", "Zlib_jll", "libLLVM_jll"]
git-tree-sha1 = "8cf7e67e264dedc5d321ec87e78525e958aea057"
uuid = "0ee61d77-7f21-5576-8119-9fcc46b10100"
version = "12.0.1+3"

[[deps.Dates]]
deps = ["Printf"]
uuid = "ade2ca70-3891-5945-98fb-dc099432e06a"

[[deps.Downloads]]
deps = ["ArgTools", "LibCURL", "NetworkOptions"]
uuid = "f43a241f-c20a-4ad4-852c-f6b1247861c6"

[[deps.InteractiveUtils]]
deps = ["Markdown"]
uuid = "b77e0a4c-d291-57a0-90e8-8db25a27a240"

[[deps.JLLWrappers]]
deps = ["Preferences"]
git-tree-sha1 = "abc9885a7ca2052a736a600f7fa66209f96506e1"
uuid = "692b3bcd-3c85-4b1f-b108-f13ce0eb3210"
version = "1.4.1"

[[deps.LibCURL]]
deps = ["LibCURL_jll", "MozillaCACerts_jll"]
uuid = "b27032c2-a3e7-50c8-80cd-2d36dbcbfd21"

[[deps.LibCURL_jll]]
deps = ["Artifacts", "LibSSH2_jll", "Libdl", "MbedTLS_jll", "Zlib_jll", "nghttp2_jll"]
uuid = "deac9b47-8bc7-5906-a0fe-35ac56dc84c0"

[[deps.LibGit2]]
deps = ["Base64", "NetworkOptions", "Printf", "SHA"]
uuid = "76f85450-5226-5b5a-8eaa-529ad045b433"

[[deps.LibSSH2_jll]]
deps = ["Artifacts", "Libdl", "MbedTLS_jll"]
uuid = "29816b5a-b9ab-546f-933c-edad1886dfa8"

[[deps.Libdl]]
uuid = "8f399da3-3557-5675-b5ff-fb832c97cbdb"

[[deps.Logging]]
uuid = "56ddb016-857b-54e1-b83d-db4d58db5568"

[[deps.Markdown]]
deps = ["Base64"]
uuid = "d6f4376e-aef5-505a-96c1-9c027394607a"

[[deps.MbedTLS_jll]]
deps = ["Artifacts", "Libdl"]
uuid = "c8ffd9c3-330d-5841-b78e-0817d7145fa1"

[[deps.MozillaCACerts_jll]]
uuid = "14a3606d-f60d-562e-9121-12d972cd8159"

[[deps.NetworkOptions]]
uuid = "ca575930-c2e3-43a9-ace4-1e988b2c1908"

[[deps.Pkg]]
deps = ["Artifacts", "Dates", "Downloads", "LibGit2", "Libdl", "Logging", "Markdown", "Printf", "REPL", "Random", "SHA", "Serialization", "TOML", "Tar", "UUIDs", "p7zip_jll"]
uuid = "44cfe95a-1eb2-52ea-b672-e2afdf69b78f"

[[deps.Preferences]]
deps = ["TOML"]
git-tree-sha1 = "47e5f437cc0e7ef2ce8406ce1e7e24d44915f88d"
uuid = "21216c6a-2e73-6563-6e65-726566657250"
version = "1.3.0"

[[deps.Printf]]
deps = ["Unicode"]
uuid = "de0858da-6303-5e67-8744-51eddeeeb8d7"

[[deps.REPL]]
deps = ["InteractiveUtils", "Markdown", "Sockets", "Unicode"]
uuid = "3fa0cd96-eef1-5676-8a61-b3b8758bbffb"

[[deps.Random]]
deps = ["SHA", "Serialization"]
uuid = "9a3f8284-a2c9-5f02-9a11-845980a1fd5c"

[[deps.SHA]]
uuid = "ea8e919c-243c-51af-8825-aaa63cd721ce"

[[deps.Scratch]]
deps = ["Dates"]
git-tree-sha1 = "0b4b7f1393cff97c33891da2a0bf69c6ed241fda"
uuid = "6c6a2e73-6563-6170-7368-637461726353"
version = "1.1.0"

[[deps.Serialization]]
uuid = "9e88b42a-f829-5b0c-bbe9-9e923198166b"

[[deps.Sockets]]
uuid = "6462fe0b-24de-5631-8697-dd941f90decc"

[[deps.TOML]]
deps = ["Dates"]
uuid = "fa267f1f-6049-4f14-aa54-33bafae1ed76"

[[deps.Tar]]
deps = ["ArgTools", "SHA"]
uuid = "a4e569a6-e804-4fa4-b0f3-eef7a1d5b13e"

[[deps.UUIDs]]
deps = ["Random", "SHA"]
uuid = "cf7118a7-6976-5b1a-9a39-7adc72f591a4"

[[deps.Unicode]]
uuid = "4ec0a83e-493e-50e2-b9ac-8f72acf5a8f5"

[[deps.Zlib_jll]]
deps = ["Libdl"]
uuid = "83775a58-1f1d-513f-b197-d71354ab007a"

[[deps.libLLVM_jll]]
deps = ["Artifacts", "Libdl"]
uuid = "8f36deef-c2a5-5394-99ed-8e07531fb29a"

[[deps.nghttp2_jll]]
deps = ["Artifacts", "Libdl"]
uuid = "8e850ede-7688-5339-a07c-302acd2aaf8d"

[[deps.p7zip_jll]]
deps = ["Artifacts", "Libdl"]
uuid = "3f19e933-33d8-53b3-aaab-bd5110c3b7a0"

Project.toml

[deps]
CBinding = "d43a6710-96b8-4a2d-833c-c424785e5374"