procps missing include dev headers upstream

Im running gentoo 6.8 and had a world update, which seemingly updated procps as well and procps > 4.0 does not have any dev headers. I had to downgrade to =sys-process/procps-3.3.17-r2 in order to (re-)build my (test-)application, which uses the dev headers.

Small Example:

#include <iostream>
#include <proc/readproc.h>
#include <cstring>

int main() {
    bool verbose = false;

    PROCTAB* proc = openproc(PROC_FILLCOM | PROC_FILLSTAT | PROC_FILLMEM | PROC_FILLSTATUS);
    if (!proc) {
        std::cerr << "Error: Failed to open /proc\n";
        return 1;
    }

    proc_t proc_info;
    bool found = false;

    memset(&proc_info, 0, sizeof(proc_info)); // Initialize proc_info struct

    if (verbose)
        std::cout << "Entering while loop\n";

    while (readproc(proc, &proc_info) != nullptr) {
        if (verbose)
            std::cout << "Processing process with PID: " << proc_info.tid << "\n";

        if (proc_info.cmdline != nullptr) {
            for (int i = 0; proc_info.cmdline[i] != nullptr; ++i) {
                if (strstr(proc_info.cmdline[i], "test=") != nullptr) {
                    found = true;
                    std::cout << "PID: " << proc_info.tid << "\n";
                    std::cout << "Command line: " << proc_info.cmdline[i] << "\n";
                    break;
                }
            }
        } else {
            if (verbose)
                std::cerr << "Error: Null cmdline encountered for PID " << proc_info.tid << "\n";
        }

        // Reset proc_info for next iteration
        memset(&proc_info, 0, sizeof(proc_info));
    }

    if (!found) {
        std::cerr << "No process found with 'test=' in the command line\n";
        return 1;
    }

g++ -o proctest proctest.cpp -lprocps

Can you explain:

Thanks