bpo-42598: Fix implicit function declarations in configure (GH-23690)
This is invalid in C99 and later and is an error with some compilers
(e.g. clang in Xcode 12), and can thus cause configure checks to
produce incorrect results.
diff --git a/configure b/configure
index 9ee750b..0c0aee9 100755
--- a/configure
+++ b/configure
@@ -11108,10 +11108,10 @@
main() {
pthread_attr_t attr;
pthread_t id;
- if (pthread_attr_init(&attr)) exit(-1);
- if (pthread_attr_setscope(&attr, PTHREAD_SCOPE_SYSTEM)) exit(-1);
- if (pthread_create(&id, &attr, foo, NULL)) exit(-1);
- exit(0);
+ if (pthread_attr_init(&attr)) return (-1);
+ if (pthread_attr_setscope(&attr, PTHREAD_SCOPE_SYSTEM)) return (-1);
+ if (pthread_create(&id, &attr, foo, NULL)) return (-1);
+ return (0);
}
_ACEOF
if ac_fn_c_try_run "$LINENO"; then :
@@ -15130,7 +15130,7 @@
int main()
{
/* Success: exit code 0 */
- exit((((wchar_t) -1) < ((wchar_t) 0)) ? 0 : 1);
+ return ((((wchar_t) -1) < ((wchar_t) 0)) ? 0 : 1);
}
_ACEOF
@@ -15511,7 +15511,7 @@
int main()
{
- exit(((-1)>>3 == -1) ? 0 : 1);
+ return (((-1)>>3 == -1) ? 0 : 1);
}
_ACEOF
@@ -15981,6 +15981,7 @@
/* end confdefs.h. */
#include <poll.h>
+#include <unistd.h>
int main()
{