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
@@ -518,7 +518,7 @@ parse_opt (int key, char *arg, struct argp_state *state)
      
      switch (key) {
      case 'A':
-          all_functions = 1;
+          all_functions++;
           break;
      case 'a':
           strict_ansi = 1;
diff --git a/src/output.c b/src/output.c
index bf5af1f..625d29e 100644
--- a/src/output.c
+++ b/src/output.c
@@ -395,7 +395,7 @@ tree_output()
           if ((main_sym = start_name ? lookup(start_name) : NULL) != NULL) {
                direct_tree(0, 0, main_sym);
                separator();
-          } else {
+          } else if (!all_functions) {
                all_functions = 1;
           }
 
@@ -403,7 +403,7 @@ tree_output()
                for (i = 0; i < num; i++) {
                     if (main_sym != symbols[i]
                         && symbols[i]->source
-                        && symbols[i]->caller == NULL) {
+                        && (all_functions > 1 || symbols[i]->caller == NULL)) {
                          direct_tree(0, 0, symbols[i]);
                          separator();
                     }