better fix

auxdir/slurm.m4

@@ -111,7 +111,8 @@ AC_DEFUN([X_AC_SLURM_PROGRAM_INVOCATION_NAME],
 [
   AC_MSG_CHECKING([for program_invocation_name])
 
-  AC_LINK_IFELSE([AC_LANG_PROGRAM([[#include <stdio.h> extern char *program_invocation_name;]], [[char *p; p = program_invocation_name; printf("%s\n", p);]])],[got_program_invocation_name=yes],[
+  AC_LINK_IFELSE([AC_LANG_PROGRAM([[#include <stdio.h>
+extern char *program_invocation_name;]], [[char *p; p = program_invocation_name; printf("%s\n", p);]])],[got_program_invocation_name=yes],[
   ])
 
   AC_MSG_RESULT(${got_program_invocation_name=no})

configure

@@ -18361,7 +18361,8 @@ $as_echo_n "checking for program_invocation_name... " >&6; }
   cat confdefs.h - <<_ACEOF >conftest.$ac_ext
 /* end confdefs.h.  */
-#include <stdio.h> extern char *program_invocation_name;
+#include <stdio.h>
+extern char *program_invocation_name;
 int
 main ()
 {