[PATCH] m4/printf.m4: include <unistd.h> when useful

[Arsen Arsenović]

* m4/printf.m4 (gl_SNPRINTF_DIRECTIVE_N): Add missing include for
unistd.h.
(gl_PRINTF_DIRECTIVE_N): Likewise.
---
Hi,

This patch addresses a missing include in configure detected by our
testing for implicit function declarations.

Tested through poke 4.1.

https://bugs.gentoo.org/935126

 ChangeLog    | 6 ++++++
 m4/printf.m4 | 2 ++
 2 files changed, 8 insertions(+)

diff --git a/ChangeLog b/ChangeLog
index dcfa4b80c2..0de05d4b90 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,3 +1,9 @@
+2024-07-01  Arsen Arsenović  <arsen@gentoo.org>
+
+       * m4/printf.m4 (gl_SNPRINTF_DIRECTIVE_N): Add missing include for
+       unistd.h.
+       (gl_PRINTF_DIRECTIVE_N): Likewise.
+
 2024-06-30  Collin Funk  <collin.funk1@gmail.com>
 
        doc: Remove references to POSIX 202x.
diff --git a/m4/printf.m4 b/m4/printf.m4
index 1363fe19e4..170ac0da39 100644
--- a/m4/printf.m4
+++ b/m4/printf.m4
@@ -899,6 +899,7 @@ AC_DEFUN([gl_PRINTF_DIRECTIVE_N],
 #include <stdio.h>
 #include <stdlib.h>
 #include <string.h>
+#include <unistd.h>
 #ifdef _MSC_VER
 #include <crtdbg.h>
 #include <inttypes.h>
@@ -1717,6 +1718,7 @@ AC_DEFUN([gl_SNPRINTF_DIRECTIVE_N],
 #include <signal.h>
 #include <stdio.h>
 #include <string.h>
+#include <unistd.h>
 #if HAVE_SNPRINTF
 # define my_snprintf snprintf
 #else
-- 
2.45.2