sys/select.h missing for pth.h (pthread)

12 views

Skip to first unread message

Paul Dufresne (dufresnep@zoho.com) [via djgpp@delorie.com]

unread,

Jun 21, 2021, 8:27:16 AM6/21/21

to djgpp

Goal: recompile http://ftp.gnu.org/gnu/chess/gnuchess-6.2.8.tar.gz in Linux for FreeDOS project.

Subgoal:

Compile the following program taken from: https://man7.org/linux/man-pages/man3/pthread_sigmask.3.html

===============

//#include <pthread.h>

#include <pth.h>

#include <stdio.h>

#include <stdlib.h>

#include <unistd.h>

#include <signal.h>

#include <errno.h>

/* Simple error handling functions */

#define handle_error_en(en, msg) \

do { errno = en; perror(msg); exit(EXIT_FAILURE); } while (0)

static void *

sig_thread(void *arg)

{

sigset_t *set = arg;

int s, sig;

for (;;) {

s = sigwait(set, &sig);

if (s != 0)

handle_error_en(s, "sigwait");

printf("Signal handling thread got signal %d\n", sig);

}

int

main(int argc, char *argv[])

{

pthread_t thread;

sigset_t set;https://github.com/jwt27/build-gcc

int s;

/* Block SIGQUIT and SIGUSR1; other threads created by main()

will inherit a copy of the signal mask. */

sigemptyset(&set);

sigaddset(&set, SIGQUIT);

sigaddset(&set, SIGUSR1);

s = pthread_sigmask(SIG_BLOCK, &set, NULL);

if (s != 0)

handle_error_en(s, "pthread_sigmask");

s = pthread_create(&thread, NULL, &sig_thread, &set);

if (s != 0)

handle_error_en(s, "pthread_create");

/* Main thread carries on to create other threads and/or do

other work. */

pause(); /* Dummy pause so we can test program */

}

=============

I changed #include <pthread.h> to <pth.h>

I might still be confused between pthread.h and pth.h.

I use: https://github.com/jwt27/build-gcc with PREFIX=/home/paul/opt/cross

I have unzip http://www.delorie.com/pub/djgpp/current/v2gnu/pth207b.zip in a temporary dir

I have copied: /pth/lib/ into /home/paul/opt/cross/i386-pc-msdosdjgpp/lib/

adjusting lastl line of .la files to that directory.

I have copied pth.h and pthread.h to: /home/paul/opt/cross/i386-pc-msdosdjgpp/sys-include/

While trying to compile subgoal program: I just commented out #include line not working in pth.h...

except for sys/select: I finished to download it from: https://code.woboq.org/qt5/include/sys/select.h.html

paul@kasparno:~/sigset$ i386-pc-msdosdjgpp-gcc sigset.c -lpthread -lpth

In file included from sigset.c:2:

/home/paul/opt/cross/i386-pc-msdosdjgpp/sys-include/pth.h:43:10: fatal error: sys/wtime.h: No such file or directory

43 | #include <sys/wtime.h> /* for struct timespec */

| ^~~~~~~~~~~~~

compilation terminated.

paul@kasparno:~/sigset$ i386-pc-msdosdjgpp-gcc sigset.c -lpthread -lpth

In file included from sigset.c:2:

/home/paul/opt/cross/i386-pc-msdosdjgpp/sys-include/pth.h:45:10: fatal error: sys/socket.h: No such file or directory

45 | #include <sys/socket.h> /* for sockaddr */

| ^~~~~~~~~~~~~~

compilation terminated.

paul@kasparno:~/sigset$ i386-pc-msdosdjgpp-gcc sigset.c -lpthread -lpth

In file included from /home/paul/opt/cross/i386-pc-msdosdjgpp/sys-include/pth.h:47,

from sigset.c:2:

/home/paul/opt/cross/i386-pc-msdosdjgpp/sys-include/sys/select.h:21:10: fatal error: features.h: No such file or directory

21 | #include <features.h>

| ^~~~~~~~~~~~

compilation terminated.

paul@kasparno:~/sigset$

So, the sys/select.h (that I put in /home/paul/opt/cross/i386-pc-msdosdjgpp/sys-include/sys/ ).