00409: bpo-13497: Fix broken nice configure test

ngie-eign · hroncok · commit 0ef242a54878 · 2025-07-04T12:56:38.000+02:00
Per POSIX, `nice(3)` requires `unistd.h` and `exit(3)` requires `stdlib.h`.

Fixing the test will prevent false positives with pedantic compilers like clang.
diff --git a/configure.ac b/configure.ac
@@ -4946,6 +4946,8 @@ LIBS=$LIBS_no_readline
 AC_MSG_CHECKING(for broken nice())
 AC_CACHE_VAL(ac_cv_broken_nice, [
 AC_RUN_IFELSE([AC_LANG_SOURCE([[
+#include <stdlib.h>
+#include <unistd.h>
 int main()
 {
 	int val1 = nice(1);

Original file line number	Diff line number	Diff line change
`@@ -4946,6 +4946,8 @@ LIBS=$LIBS_no_readline`
`4946`	`4946`	`AC_MSG_CHECKING(for broken nice())`
`4947`	`4947`	`AC_CACHE_VAL(ac_cv_broken_nice, [`
`4948`	`4948`	`AC_RUN_IFELSE([AC_LANG_SOURCE([[`
	`4949`	`+#include <stdlib.h>`
	`4950`	`+#include <unistd.h>`
`4949`	`4951`	`int main()`
`4950`	`4952`	`{`
`4951`	`4953`	`int val1 = nice(1);`