vte: fix build on < 10.7

Fixes: https://trac.macports.org/ticket/69963

gnome/vte/Portfile

@@ -15,8 +15,8 @@ maintainers         {devans @dbevans} {mascguy @mascguy} openmaintainer
 description         VTE is a library (libvte) implementing a terminal emulator widget for GTK+, \
                     and a minimal sample application (vte) using that.
 long_description    ${description} \
-                    Vte is mainly used in gnome-terminal, but can also be used to embed a \
-                    console/terminal in games, editors, IDEs, etc.
+                    Vte is mainly used in gnome-terminal, but can also be used to embed \
+                    a console/terminal in games, editors, IDEs, etc.
 homepage            https://wiki.gnome.org/Apps/Terminal/VTE
 
 set branch          [join [lrange [split $version .] 0 1] .]
@@ -38,6 +38,9 @@ meson.wrap_mode     nodownload
 # so for now, patch meson.build to reduce the massive number of warnings.
 patchfiles-append   patch-meson-warnings.diff
 
+# https://trac.macports.org/ticket/69963
+patchfiles-append   patch-F_DUPFD_CLOEXEC.diff
+
 depends_build-append \
                     port:gettext \
                     port:intltool \

gnome/vte/files/patch-F_DUPFD_CLOEXEC.diff

@@ -0,0 +1,16 @@
+--- src/libc-glue.hh	2024-03-16 05:20:18.000000000 +0800
++++ src/libc-glue.hh	2024-05-12 13:25:23.000000000 +0800
+@@ -220,7 +220,13 @@
+ {
+         auto r = int{};
+         do {
++#ifdef F_DUPFD_CLOEXEC
+                 r = fcntl(oldfd, F_DUPFD_CLOEXEC, newfd);
++#else
++                r = fcntl(oldfd, F_DUPFD, newfd);
++                if (r > 0)
++                        fcntl(r, F_SETFD, FD_CLOEXEC);
++#endif
+         } while (r == -1 && errno == EINTR);
+         return r;
+ }