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configure: Avoid implicit declaration of exit, strcmp in snprintf probes

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Future compilers will not support implicit function declarations by
default, so add the additional #include directives for the appropriate
function prototypes.
This commit is contained in:
Florian Weimer
2023-04-25 21:18:47 +02:00
parent 9626bcb07a
commit 36e6f5de44
2 changed files with 8 additions and 0 deletions
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4
configure vendored
View File

@@ -15111,6 +15111,8 @@ else
cat confdefs.h - <<_ACEOF >conftest.$ac_ext
/* end confdefs.h. */
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
int main(void)
{
@@ -15150,6 +15152,8 @@ else
cat confdefs.h - <<_ACEOF >conftest.$ac_ext
/* end confdefs.h. */
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <stdarg.h>
int my_vsnprintf (char *buf, const char *tmpl, ...)

4
m4/snprintf.m4
View File

@@ -4,6 +4,8 @@ AC_MSG_CHECKING(for working snprintf)
AC_CACHE_VAL(ac_cv_have_working_snprintf,
[AC_TRY_RUN(
[#include <stdio.h>
#include <stdlib.h>
#include <string.h>
int main(void)
{
@@ -23,6 +25,8 @@ AC_MSG_CHECKING(for working vsnprintf)
AC_CACHE_VAL(ac_cv_have_working_vsnprintf,
[AC_TRY_RUN(
[#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <stdarg.h>
int my_vsnprintf (char *buf, const char *tmpl, ...)