gc: add 'help' option to list all available GC

Signed-off-by: Jean Privat <jean@pryen.org>

diff --git a/c_src/clib/nit_main.c b/c_src/clib/nit_main.c
index e7ad4e9..1f955cd 100644 (file)
--- a/c_src/clib/nit_main.c
+++ b/c_src/clib/nit_main.c
@@ -101,6 +101,13 @@ void initialize_gc_option(void) {
                        gc_option = nitgc;
                } else if (strcmp(opt, "large")==0) {
                        gc_option = large;
+               } else if (strcmp(opt, "help")==0) {
+                       fprintf(stderr, "NIT_GC_OPTION accepts 'nitgc'"
+#ifdef WITH_LIBGC
+                                       ", 'boehm'"
+#endif
+                                       ", 'large'. Default is '%s'.\n", def);
+                       exit(1);
                } else {
                        fprintf(stderr, "Invalid GC option in NIT_GC_OPTION environment variable. Using default '%s'.\n", def);
                }

diff --git a/clib/nit_main.c b/clib/nit_main.c
index e7ad4e9..1f955cd 100644 (file)
--- a/clib/nit_main.c
+++ b/clib/nit_main.c
@@ -101,6 +101,13 @@ void initialize_gc_option(void) {
                        gc_option = nitgc;
                } else if (strcmp(opt, "large")==0) {
                        gc_option = large;
+               } else if (strcmp(opt, "help")==0) {
+                       fprintf(stderr, "NIT_GC_OPTION accepts 'nitgc'"
+#ifdef WITH_LIBGC
+                                       ", 'boehm'"
+#endif
+                                       ", 'large'. Default is '%s'.\n", def);
+                       exit(1);
                } else {
                        fprintf(stderr, "Invalid GC option in NIT_GC_OPTION environment variable. Using default '%s'.\n", def);
                }