implicit declaration of function snprintf in openbsd-compat/getdtablecount.c

[NHOrus]

Hello!
opensmtpd fails to build with GCC-14 on Gentoo with error implicit declaration of function snprintf
https://bugs.gentoo.org/922951

x86_64-pc-linux-gnu-gcc -DHAVE_CONFIG_H -I. -I../..  -DIO_TLS -I../../usr.sbin/smtpd -I. -DSMTPD_CONFDIR=\"/etc/smtpd\" -DPATH_CHROOT=\"/var/empty\" -DPATH_SMTPCTL=\"/usr/sbin/smtpctl\" -DPATH_MAILLOCAL=\"/usr/libexec/opensmtpd/mail.local\" -DPATH_MAKEMAP=\"/usr/sbin/makemap\" -DPATH_LIBEXEC=\"/usr/libexec/opensmtpd\" -DHAVE_CONFIG_H -I/usr/lib64 -I/usr/lib64  -I../../openbsd-compat -I../../openbsd-compat/libtls -I../../openbsd-compat/libasr  -isystem /usr/include/bsd -DLIBBSD_OVERLAY -O2 -march=x86-64 -pipe -pipe -frecord-gcc-switches -fno-diagnostics-color -fmessage-length=0 -Wall -Wpointer-arith -Wuninitialized -Wsign-compare -Wformat-security -Wsizeof-pointer-memaccess -Wno-pointer-sign -Wno-unused-result -fno-strict-aliasing -fno-builtin-memset -std=gnu99 -c -o ../../openbsd-compat/getdtablecount.o ../../openbsd-compat/getdtablecount.c
../../openbsd-compat/getdtablecount.c: In function ‘getdtablecount’:
../../openbsd-compat/getdtablecount.c:35:13: error: implicit declaration of function ‘snprintf’ [-Wimplicit-function-declaration[https://gcc.gnu.org/onlinedocs/gcc/Warning-Options.html#index-Wimplicit-function-declaration]]
   35 |         if (snprintf(path, sizeof path, "/proc/%ld/fd/*", (long)getpid()) < 0)
      |             ^~~~~~~~
../../openbsd-compat/getdtablecount.c:23:1: note: include ‘<stdio.h>’ or provide a declaration of ‘snprintf’
   22 | #include <unistd.h>
  +++ |+#include <stdio.h>
   23 | 
../../openbsd-compat/getdtablecount.c:35:13: warning: incompatible implicit declaration of built-in function ‘snprintf’ [-Wbuiltin-declaration-mismatch[https://gcc.gnu.org/onlinedocs/gcc/Warning-Options.html#index-Wbuiltin-declaration-mismatch]]
   35 |         if (snprintf(path, sizeof path, "/proc/%ld/fd/*", (long)getpid()) < 0)
      |             ^~~~~~~~
../../openbsd-compat/getdtablecount.c:35:13: note: include ‘<stdio.h>’ or provide a declaration of ‘snprintf’

Bug found in opensmtpd-7.4.0 but persists in current master.

[poolpOrg]

a fix was committed a minute ago if you can test and confirm ?

[NHOrus]

Thank you. Compilation fixed.