app, libgimpbase: gimp_signal_private()'s header is now made private.

As other functions, it is still exported, but let make its header not
exposed in public API.

app/signals.c

@@ -22,6 +22,7 @@
 #include <gio/gio.h>
 
 #include "libgimpbase/gimpbase.h"
+#include "libgimpbase/gimpbase-private.h"
 
 #include "core/core-types.h"
 

libgimpbase/gimpbase-private.h

@@ -26,6 +26,10 @@
 #include <libgimpbase/gimpcpuaccel-private.h>
 #include <libgimpbase/gimpenv-private.h>
 
+#ifndef G_OS_WIN32
+#include <libgimpbase/gimpsignal.h>
+#endif
+
 
 typedef struct _GimpUnitVtable GimpUnitVtable;
 

libgimpbase/gimpbase.h

@@ -41,10 +41,6 @@
 #include <libgimpbase/gimpversion.h>
 #include <libgimpbase/gimpvaluearray.h>
 
-#ifndef G_OS_WIN32
-#include <libgimpbase/gimpsignal.h>
-#endif
-
 #undef __GIMP_BASE_H_INSIDE__
 
 #endif  /* __GIMP_BASE_H__ */

libgimpbase/gimpsignal.c

@@ -41,7 +41,7 @@
 
 /**
  * gimp_signal_private: (skip)
- * @signum: Selects signal to be handled see man 5 signal (or man 7 signal)
+ * @signum: Selects signal to be handled (see `man 7 signal`)
  * @handler: Handler that maps to signum. Invoked by O/S.
  *           Handler gets signal that caused invocation. Corresponds
  *           to the @sa_handler field of the @sigaction struct.

libgimpbase/meson.build

@@ -61,7 +61,6 @@ libgimpbase_sources_introspectable = files(
   'gimpparasite.c',
   'gimpparasiteio.c',
   'gimprectangle.c',
-  'gimpsignal.c',
   'gimpunit.c',
   'gimputils.c',
   'gimpvaluearray.c',
@@ -72,6 +71,7 @@ libgimpbase_sources = [
   'gimpbase-private.c',
   'gimpprotocol.c',
   'gimpreloc.c',
+  'gimpsignal.c',
   'gimpwire.c',
 
   'gimpbaseenums.c',
@@ -96,7 +96,6 @@ libgimpbase_headers_introspectable = files(
   'gimpparasite.h',
   'gimpparasiteio.h',
   'gimprectangle.h',
-  'gimpsignal.h',
   'gimpunit.h',
   'gimputils.h',
   'gimpvaluearray.h',