diff -ru vim-8.2.4230.orig/src/auto/configure vim-8.2.4230/src/auto/configure
--- vim-8.2.4230.orig/src/auto/configure	2022-01-27 16:04:22.000000000 +0100
+++ vim-8.2.4230/src/auto/configure	2022-01-27 17:15:07.217234738 +0100
@@ -3772,7 +3772,7 @@
 fi
 
 ac_ext=c
-ac_cpp='$CPP $CPPFLAGS'
+ac_cpp='$CPP $CFLAGS $CPPFLAGS'
 ac_compile='$CC -c $CFLAGS $CPPFLAGS conftest.$ac_ext >&5'
 ac_link='$CC -o conftest$ac_exeext $CFLAGS $CPPFLAGS $LDFLAGS conftest.$ac_ext $LIBS >&5'
 ac_compiler_gnu=$ac_cv_c_compiler_gnu
@@ -8343,6 +8343,7 @@
 
 # Standard set of common directories for X headers.
 # Check X11 before X11Rn because it is often a symlink to the current release.
+if test -z "$ac_x_header_dirs"; then
 ac_x_header_dirs='
 /usr/X11/include
 /usr/X11R7/include
@@ -8381,6 +8382,7 @@
 
 /usr/openwin/include
 /usr/openwin/share/include'
+fi
 
 if test "$ac_x_includes" = no; then
   # Guess where to find include files, by looking for Xlib.h.
@@ -13037,93 +13039,7 @@
 fi
 rm -f core conftest.err conftest.$ac_objext conftest.$ac_ext

-{ $as_echo "$as_me:${as_lineno-$LINENO}: checking for timer_create" >&5
-$as_echo_n "checking for timer_create... " >&6; }
-save_LIBS="$LIBS"
-LIBS="$LIBS -lrt"
-if test "$cross_compiling" = yes; then :
-  { { $as_echo "$as_me:${as_lineno-$LINENO}: error: in \`$ac_pwd':" >&5
-$as_echo "$as_me: error: in \`$ac_pwd':" >&2;}
-as_fn_error $? "cannot run test program while cross compiling
-See \`config.log' for more details" "$LINENO" 5; }
-else
-  cat confdefs.h - <<_ACEOF >conftest.$ac_ext
-/* end confdefs.h.  */
-
-#include<signal.h>
-#include<time.h>
-static void set_flag(union sigval sv) {}
-
-int
-main ()
-{
-
-  struct timespec ts;
-  struct sigevent action = {0};
-  timer_t timer_id;
-
-  action.sigev_notify = SIGEV_THREAD;
-  action.sigev_notify_function = set_flag;
-  if (timer_create(CLOCK_MONOTONIC, &action, &timer_id) < 0)
-    exit(1);  // cannot create a monotonic timer
-
-  ;
-  return 0;
-}
-_ACEOF
-if ac_fn_c_try_run "$LINENO"; then :
-  { $as_echo "$as_me:${as_lineno-$LINENO}: result: yes; with -lrt" >&5
-$as_echo "yes; with -lrt" >&6; }; $as_echo "#define HAVE_TIMER_CREATE 1" >>confdefs.h
-
-else
-  LIBS="$save_LIBS"
-  if test "$cross_compiling" = yes; then :
-  { { $as_echo "$as_me:${as_lineno-$LINENO}: error: in \`$ac_pwd':" >&5
-$as_echo "$as_me: error: in \`$ac_pwd':" >&2;}
-as_fn_error $? "cannot run test program while cross compiling
-See \`config.log' for more details" "$LINENO" 5; }
-else
-  cat confdefs.h - <<_ACEOF >conftest.$ac_ext
-/* end confdefs.h.  */
-
-#include<signal.h>
-#include<time.h>
-static void set_flag(union sigval sv) {}
-
-int
-main ()
-{
-
-    struct timespec ts;
-    struct sigevent action = {0};
-    timer_t timer_id;
-
-    action.sigev_notify = SIGEV_THREAD;
-    action.sigev_notify_function = set_flag;
-    if (timer_create(CLOCK_MONOTONIC, &action, &timer_id) < 0)
-      exit(1);  // cannot create a monotonic timer
-
-  ;
-  return 0;
-}
-_ACEOF
-if ac_fn_c_try_run "$LINENO"; then :
-  { $as_echo "$as_me:${as_lineno-$LINENO}: result: yes" >&5
-$as_echo "yes" >&6; }; $as_echo "#define HAVE_TIMER_CREATE 1" >>confdefs.h
-
-else
-  { $as_echo "$as_me:${as_lineno-$LINENO}: result: no" >&5
-$as_echo "no" >&6; }
-fi
-rm -f core *.core core.conftest.* gmon.out bb.out conftest$ac_exeext \
-  conftest.$ac_objext conftest.beam conftest.$ac_ext
-fi
-
-fi
-rm -f core *.core core.conftest.* gmon.out bb.out conftest$ac_exeext \
-  conftest.$ac_objext conftest.beam conftest.$ac_ext
-fi
-
+$as_echo "#define HAVE_TIMER_CREATE 1" >>confdefs.h

 { $as_echo "$as_me:${as_lineno-$LINENO}: checking whether stat() ignores a trailing slash" >&5
 $as_echo_n "checking whether stat() ignores a trailing slash... " >&6; }
diff -ru vim-8.2.4230.orig/src/Makefile vim-8.2.4230/src/Makefile
--- vim-8.2.4230.orig/src/Makefile	2022-01-27 16:04:22.000000000 +0100
+++ vim-8.2.4230/src/Makefile	2022-01-27 17:13:59.313233849 +0100
@@ -3093,7 +3093,7 @@
 	    $(PERLLIB)/ExtUtils/typemap if_perl.xs >> $@
 
 auto/osdef.h: auto/config.h osdef.sh osdef1.h.in osdef2.h.in
-	CC="$(CC) $(OSDEF_CFLAGS)" srcdir=$(srcdir) sh $(srcdir)/osdef.sh
+	CC="$(CC) $(OSDEF_CFLAGS) -I$(PKG_PREFIX)/include" srcdir=$(srcdir) sh $(srcdir)/osdef.sh
 
 auto/os_haiku.rdef: os_haiku.rdef.in
 	@echo creating $@