fix broken nice configure test.

ngie-eign · mcepl · commit 529b0ff6c10d · 2024-11-29T12:03:18.000+01:00
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.

Code is from gh#python/cpython!12041 (released upstream in 3.8.0)

Fixes: bpo#13497
Patch: broken-nice-configure-missint-include.patch
diff --git a/configure.ac b/configure.ac
@@ -4988,6 +4988,8 @@ 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
`@@ -4988,6 +4988,8 @@ LIBS=$LIBS_no_readline`
`4988`	`4988`	`AC_MSG_CHECKING(for broken nice())`
`4989`	`4989`	`AC_CACHE_VAL(ac_cv_broken_nice, [`
`4990`	`4990`	`AC_RUN_IFELSE([AC_LANG_SOURCE([[`
	`4991`	`+#include <stdlib.h>`
	`4992`	`+#include <unistd.h>`
`4991`	`4993`	`int main()`
`4992`	`4994`	`{`
`4993`	`4995`	`int val1 = nice(1);`