diff --git a/fuzzterm.c b/fuzzterm.c
index c5c29ef4..660a6be5 100644
--- a/fuzzterm.c
+++ b/fuzzterm.c
@@ -6,9 +6,6 @@
 #include "dialog.h"
 #include "terminal.h"
 
-/* For Unix in particular, but harmless if this main() is reused elsewhere */
-const bool buildinfo_gtk_relevant = false;
-
 static const TermWinVtable fuzz_termwin_vt;
 
 int main(int argc, char **argv)
diff --git a/testcrypt.c b/testcrypt.c
index 67627752..752947cf 100644
--- a/testcrypt.c
+++ b/testcrypt.c
@@ -49,13 +49,6 @@ static NORETURN PRINTF_LIKE(1, 2) void fatal_error(const char *p, ...)
 
 void out_of_memory(void) { fatal_error("out of memory"); }
 
-/* For platforms where getticks is defined within this code base */
-unsigned long (getticks)(void)
-{ unreachable("this is a stub needed to link, and should never be called"); }
-
-FILE *f_open(const struct Filename *fn, char const *mode, bool private)
-{ unreachable("f_open should never be called by this test program"); }
-
 static bool old_keyfile_warning_given;
 void old_keyfile_warning(void) { old_keyfile_warning_given = true; }
 
diff --git a/testsc.c b/testsc.c
index f04f718c..93bf263a 100644
--- a/testsc.c
+++ b/testsc.c
@@ -93,13 +93,6 @@ static NORETURN PRINTF_LIKE(1, 2) void fatal_error(const char *p, ...)
 }
 
 void out_of_memory(void) { fatal_error("out of memory"); }
-FILE *f_open(const Filename *filename, char const *mode, bool is_private)
-{ unreachable("this is a stub needed to link, and should never be called"); }
-void old_keyfile_warning(void)
-{ unreachable("this is a stub needed to link, and should never be called"); }
-/* For platforms where getticks is defined within this code base */
-unsigned long (getticks)(void)
-{ unreachable("this is a stub needed to link, and should never be called"); }
 
 /*
  * A simple deterministic PRNG, without any of the Fortuna
diff --git a/unix/uxpgnt.c b/unix/uxpgnt.c
index 4adca625..0fc3dd11 100644
--- a/unix/uxpgnt.c
+++ b/unix/uxpgnt.c
@@ -238,37 +238,6 @@ const char *const appname = "Pageant";
 
 static bool time_to_die = false;
 
-/* Stub functions to permit linking against x11fwd.c. These never get
- * used, because in LIFE_X11 mode we connect to the X server using a
- * straightforward Socket and don't try to create an ersatz SSH
- * forwarding too. */
-void chan_remotely_opened_confirmation(Channel *chan) { }
-void chan_remotely_opened_failure(Channel *chan, const char *err) { }
-bool chan_default_want_close(Channel *chan, bool s, bool r) { return false; }
-bool chan_no_exit_status(Channel *ch, int s) { return false; }
-bool chan_no_exit_signal(Channel *ch, ptrlen s, bool c, ptrlen m)
-{ return false; }
-bool chan_no_exit_signal_numeric(Channel *ch, int s, bool c, ptrlen m)
-{ return false; }
-bool chan_no_run_shell(Channel *chan) { return false; }
-bool chan_no_run_command(Channel *chan, ptrlen command) { return false; }
-bool chan_no_run_subsystem(Channel *chan, ptrlen subsys) { return false; }
-bool chan_no_enable_x11_forwarding(
-    Channel *chan, bool oneshot, ptrlen authproto, ptrlen authdata,
-    unsigned screen_number) { return false; }
-bool chan_no_enable_agent_forwarding(Channel *chan) { return false; }
-bool chan_no_allocate_pty(
-    Channel *chan, ptrlen termtype, unsigned width, unsigned height,
-    unsigned pixwidth, unsigned pixheight, struct ssh_ttymodes modes)
-{ return false; }
-bool chan_no_set_env(Channel *chan, ptrlen var, ptrlen value) { return false; }
-bool chan_no_send_break(Channel *chan, unsigned length) { return false; }
-bool chan_no_send_signal(Channel *chan, ptrlen signame) { return false; }
-bool chan_no_change_window_size(
-    Channel *chan, unsigned width, unsigned height,
-    unsigned pixwidth, unsigned pixheight) { return false; }
-void chan_no_request_response(Channel *chan, bool success) {}
-
 /*
  * These functions are part of the plug for our connection to the X
  * display, so they do get called. They needn't actually do anything,
diff --git a/unix/uxsocks.c b/unix/uxsocks.c
index 91613afd..748790b8 100644
--- a/unix/uxsocks.c
+++ b/unix/uxsocks.c
@@ -15,8 +15,6 @@
 #include "ssh.h"
 #include "psocks.h"
 
-const bool buildinfo_gtk_relevant = false;
-
 typedef struct PsocksDataSinkPopen {
     stdio_sink sink[2];
     PsocksDataSink pds;
diff --git a/windows/winpgnt.c b/windows/winpgnt.c
index e96a432e..1f3d7080 100644
--- a/windows/winpgnt.c
+++ b/windows/winpgnt.c
@@ -1331,11 +1331,6 @@ void spawn_cmd(const char *cmdline, const char *args, int show)
     }
 }
 
-void logevent(LogContext *logctx, const char *event)
-{
-    unreachable("Pageant can't create a LogContext, so this can't be called");
-}
-
 void noise_ultralight(NoiseSourceId id, unsigned long data)
 {
     /* Pageant doesn't use random numbers, so we ignore this */