[PATCH v1 2/2] pahole.c: Add --inner_anonymous option

[Douglas RAILLARD <douglas.raillard@arm.com>]

From: Douglas Raillard <douglas.raillard@arm.com>

Allow making the inner struct/enum/union anonymous. This permits using
the header to inspect pointer values using -E, without having to care
about avoiding duplicate type definitions such as:

    struct foo { ... };
    struct bar {
        struct foo {
	     ....
	} a;
    };

With --inner_anonymous, the conflict between the two definitions of
struct foo is gone:

    struct foo { ... };
    struct bar {
        struct {
	     ....
	} a;
    };

Signed-off-by: Douglas Raillard <douglas.raillard@arm.com>
---
 pahole.c | 8 ++++++++
 1 file changed, 8 insertions(+)

diff --git a/pahole.c b/pahole.c
index 80271b5..b9c6305 100644
--- a/pahole.c
+++ b/pahole.c
@@ -1125,6 +1125,7 @@ ARGP_PROGRAM_VERSION_HOOK_DEF = dwarves_print_version;
 #define ARGP_hashbits		   329
 #define ARGP_devel_stats	   330
 #define ARGP_skip_encoding_btf_tag 331
+#define ARGP_inner_anonymous       332
 
 static const struct argp_option pahole__options[] = {
 	{
@@ -1232,6 +1233,11 @@ static const struct argp_option pahole__options[] = {
 		.key  = 'E',
 		.doc  = "expand class members",
 	},
+	{
+		.name = "inner_anonymous",
+		.key  = ARGP_inner_anonymous,
+		.doc  = "expanded class members are anonymous",
+	},
 	{
 		.name = "nr_members",
 		.key  = 'n',
@@ -1650,6 +1656,8 @@ static error_t pahole__options_parser(int key, char *arg,
 		conf_load.ptr_table_stats = true;	break;
 	case ARGP_skip_encoding_btf_tag:
 		conf_load.skip_encoding_btf_tag = true;	break;
+	case ARGP_inner_anonymous:
+		conf.inner_anonymous = true;            break;
 	default:
 		return ARGP_ERR_UNKNOWN;
 	}
-- 
2.25.1