Finish implementation of --all

* doc/cflow.1: Document the --all --all behavior
* doc/cflow.texi: Likewise.
* src/main.c: Increment all_functions for each -A option.
* src/output.c (tree_output): If one --all option is used, output graphs
for all top-level functions (i.e. functions, not reachable from other ones).
If used twice, output graphs for all global function.

* tests/all.at: New test.
* tests/Makefile.am: Add new test.
* tests/testsuite.at: Likewise.

2 files changed, 3 insertions, 3 deletions

diff --git a/src/main.c b/src/main.c
index a5535c7..bdfddb0 100644
--- a/src/main.c
+++ b/src/main.c
@@ -520,3 +520,3 @@ parse_opt (int key, char *arg, struct argp_state *state)
      case 'A':
-	  all_functions = 1;
+	  all_functions++;
 	  break;
diff --git a/src/output.c b/src/output.c
index bf5af1f..625d29e 100644
--- a/src/output.c
+++ b/src/output.c
@@ -397,3 +397,3 @@ tree_output()
 	       separator();
-	  } else {
+	  } else if (!all_functions) {
 	       all_functions = 1;
@@ -405,3 +405,3 @@ tree_output()
 			&& symbols[i]->source
-			&& symbols[i]->caller == NULL) {
+			&& (all_functions > 1 || symbols[i]->caller == NULL)) {
 			 direct_tree(0, 0, symbols[i]);