From 85be70efa516bccb375bd7c011a2882a064c24da Mon Sep 17 00:00:00 2001
From: ManoloFLTK <41016272+ManoloFLTK@users.noreply.github.com>
Date: Tue, 3 Jun 2025 08:23:04 +0200
Subject: Restore use of build option FLTK_USE_POLL

---
 src/drivers/Unix/Fl_Unix_Screen_Driver.H   |  5 +++--
 src/drivers/Unix/Fl_Unix_Screen_Driver.cxx |  4 +++-
 src/drivers/Unix/Fl_Unix_System_Driver.cxx | 18 +++++++++---------
 3 files changed, 15 insertions(+), 12 deletions(-)

diff --git a/src/drivers/Unix/Fl_Unix_Screen_Driver.H b/src/drivers/Unix/Fl_Unix_Screen_Driver.H
index 36eb943f8..dd3f6e5c7 100644
--- a/src/drivers/Unix/Fl_Unix_Screen_Driver.H
+++ b/src/drivers/Unix/Fl_Unix_Screen_Driver.H
@@ -24,7 +24,6 @@
 #  if USE_POLL
 
 #    include <poll.h>
-static pollfd *pollfds = 0;
 
 #  else
 #    if HAVE_SYS_SELECT_H
@@ -52,7 +51,9 @@ static pollfd *pollfds = 0;
 
 class Fl_Unix_Screen_Driver : public Fl_Screen_Driver {
 public:
-#  if !USE_POLL
+#  if USE_POLL
+  static pollfd *pollfds;
+#  else
   static fd_set fdsets[3];
 #  endif
   static int maxfd;
diff --git a/src/drivers/Unix/Fl_Unix_Screen_Driver.cxx b/src/drivers/Unix/Fl_Unix_Screen_Driver.cxx
index 4988474cb..97b11b840 100644
--- a/src/drivers/Unix/Fl_Unix_Screen_Driver.cxx
+++ b/src/drivers/Unix/Fl_Unix_Screen_Driver.cxx
@@ -18,7 +18,9 @@
 #include <sys/time.h>
 #include "Fl_Unix_Screen_Driver.H"
 
-#if !USE_POLL
+#if USE_POLL
+pollfd *Fl_Unix_Screen_Driver::pollfds = NULL;
+#else
 fd_set Fl_Unix_Screen_Driver::fdsets[3];
 #endif
 int Fl_Unix_Screen_Driver::maxfd = 0;
diff --git a/src/drivers/Unix/Fl_Unix_System_Driver.cxx b/src/drivers/Unix/Fl_Unix_System_Driver.cxx
index 2b15882a1..443838c5d 100644
--- a/src/drivers/Unix/Fl_Unix_System_Driver.cxx
+++ b/src/drivers/Unix/Fl_Unix_System_Driver.cxx
@@ -723,18 +723,18 @@ void Fl_Unix_System_Driver::add_fd(int n, int events, void (*cb)(int, void*), vo
 #  if USE_POLL
     pollfd *tpoll;
 
-    if (!pollfds) tpoll = (pollfd*)malloc(fd_array_size*sizeof(pollfd));
-    else tpoll = (pollfd*)realloc(pollfds, fd_array_size*sizeof(pollfd));
+    if (!Fl_Unix_Screen_Driver::pollfds) tpoll = (pollfd*)malloc(fd_array_size*sizeof(pollfd));
+    else tpoll = (pollfd*)realloc(Fl_Unix_Screen_Driver::pollfds, fd_array_size*sizeof(pollfd));
 
     if (!tpoll) return;
-    pollfds = tpoll;
+    Fl_Unix_Screen_Driver::pollfds = tpoll;
 #  endif
   }
   Fl_Unix_Screen_Driver::fd[i].cb = cb;
   Fl_Unix_Screen_Driver::fd[i].arg = v;
 #  if USE_POLL
-  pollfds[i].fd = n;
-  pollfds[i].events = events;
+  Fl_Unix_Screen_Driver::pollfds[i].fd = n;
+  Fl_Unix_Screen_Driver::pollfds[i].events = events;
 #  else
   Fl_Unix_Screen_Driver::fd[i].fd = n;
   Fl_Unix_Screen_Driver::fd[i].events = events;
@@ -756,10 +756,10 @@ void Fl_Unix_System_Driver::remove_fd(int n, int events) {
 # endif
   for (i=j=0; i<Fl_Unix_Screen_Driver::nfds; i++) {
 #  if USE_POLL
-    if (pollfds[i].fd == n) {
-      int e = pollfds[i].events & ~events;
+    if (Fl_Unix_Screen_Driver::pollfds[i].fd == n) {
+      int e = Fl_Unix_Screen_Driver::pollfds[i].events & ~events;
       if (!e) continue; // if no events left, delete this fd
-      pollfds[j].events = e;
+      Fl_Unix_Screen_Driver::pollfds[j].events = e;
     }
 #  else
     if (Fl_Unix_Screen_Driver::fd[i].fd == n) {
@@ -773,7 +773,7 @@ void Fl_Unix_System_Driver::remove_fd(int n, int events) {
     if (j<i) {
       Fl_Unix_Screen_Driver::fd[j] = Fl_Unix_Screen_Driver::fd[i];
 #  if USE_POLL
-      pollfds[j] = pollfds[i];
+      Fl_Unix_Screen_Driver::pollfds[j] = Fl_Unix_Screen_Driver::pollfds[i];
 #  endif
     }
     j++;
-- 
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