Use simpler way to print function pointers

The module code can’t possibly work on weird platforms where
function pointers are wider than data pointers, so there’s no need
to bother with the stackoverflow-like approach that is intended
only for portability to such platforms.  Besides, the
stackoverflow-like approach does not work well on weird platforms
where CHAR_BIT is not a multiple of 4.
* src/lisp.h (pMx): New macro.
* src/print.c (data_from_funcptr) [HAVE_MODULES]: New function.
(print_vectorlike) [HAVE_MODULES]: Use it.
(print_object): Make sure buf is big enough for this.

1 files changed, 2 insertions, 0 deletions

diff --git a/src/lisp.h b/src/lisp.h
index ca833476c03..61cc20e9d42 100644
--- a/src/lisp.h
+++ b/src/lisp.h
@@ -144,11 +144,13 @@ typedef intmax_t printmax_t;
 typedef uintmax_t uprintmax_t;
 # define pMd PRIdMAX
 # define pMu PRIuMAX
+# define pMx PRIxMAX
 #else
 typedef EMACS_INT printmax_t;
 typedef EMACS_UINT uprintmax_t;
 # define pMd pI"d"
 # define pMu pI"u"
+# define pMx pI"x"
 #endif
 
 /* Use pD to format ptrdiff_t values, which suffice for indexes into