Add ATTRIBUTE_DEALLOC to extern functions

This can help static checking.  It’s not as important for static
functions, where GCC can figure this stuff out own its own.
* src/sysstdio.h (emacs_fopen): Add ATTRIBUTE_DEALLOC (fclose, 1).
* src/tparam.h (tparam): Add ATTRIBUTE_DEALLOC_FREE.
Include stdlib.h so that ‘free’ is declared.
* src/xterm.h (x_get_atom_name): Add ATTRIBUTE_DEALLOC_FREE.

3 files changed, 7 insertions, 3 deletions

diff --git a/src/sysstdio.h b/src/sysstdio.h
index 727a466be52..efedc3e450b 100644
--- a/src/sysstdio.h
+++ b/src/sysstdio.h
@@ -28,7 +28,8 @@ along with GNU Emacs.  If not, see <https://www.gnu.org/licenses/>.  */
 #include <attribute.h>
 #include <unlocked-io.h>
 
-extern FILE *emacs_fopen (char const *, char const *) ATTRIBUTE_MALLOC;
+extern FILE *emacs_fopen (char const *, char const *)
+  ATTRIBUTE_MALLOC ATTRIBUTE_DEALLOC (fclose, 1);
 extern void errputc (int);
 extern void errwrite (void const *, ptrdiff_t);
 extern void close_output_streams (void);
diff --git a/src/tparam.h b/src/tparam.h
index 653f01bdde0..4f4bdc8820f 100644
--- a/src/tparam.h
+++ b/src/tparam.h
@@ -20,6 +20,8 @@ along with GNU Emacs.  If not, see <https://www.gnu.org/licenses/>.  */
 #ifndef EMACS_TPARAM_H
 #define EMACS_TPARAM_H
 
+#include <stdlib.h>
+
 #include <attribute.h>
 
 /* Don't try to include termcap.h.  On some systems, configure finds a
@@ -32,7 +34,8 @@ int tgetnum (const char *);
 char *tgetstr (const char *, char **);
 char *tgoto (const char *, int, int);
 
-char *tparam (const char *, char *, int, int, int, int, int) ATTRIBUTE_MALLOC;
+char *tparam (const char *, char *, int, int, int, int, int)
+  ATTRIBUTE_MALLOC ATTRIBUTE_DEALLOC_FREE;
 
 extern char PC;
 extern char *BC;
diff --git a/src/xterm.h b/src/xterm.h
index 329fa4c84f6..283d4fa9b11 100644
--- a/src/xterm.h
+++ b/src/xterm.h
@@ -1542,7 +1542,7 @@ extern void x_own_selection (Lisp_Object, Lisp_Object, Lisp_Object);
 extern Atom x_intern_cached_atom (struct x_display_info *, const char *,
                                   bool);
 extern char *x_get_atom_name (struct x_display_info *, Atom, bool *)
-  ATTRIBUTE_MALLOC;
+  ATTRIBUTE_MALLOC ATTRIBUTE_DEALLOC_FREE;
 
 #ifdef USE_GTK
 extern bool xg_set_icon (struct frame *, Lisp_Object);