Add the `--override-abi` option (#2329)

* Add the `--override-abi` option.

This option can be used from the CLI with the <abi>:<regex> syntax and
it overrides the ABI of a function if it matches <regex>.

Fixes #2257

1 files changed, 18 insertions, 0 deletions

diff --git a/bindgen-cli/options.rs b/bindgen-cli/options.rs
index 5c3960e9..c186cfd9 100644
--- a/bindgen-cli/options.rs
+++ b/bindgen-cli/options.rs
@@ -568,6 +568,12 @@ where
             Arg::new("merge-extern-blocks")
                 .long("merge-extern-blocks")
                 .help("Deduplicates extern blocks."),
+            Arg::new("override-abi")
+                .long("override-abi")
+                .help("Overrides the ABI of functions matching <regex>. The <override> value must be of the shape <abi>:<regex> where <abi> can be one of C, stdcall, fastcall, thiscall, aapcs or win64.")
+                .value_name("override")
+                .multiple_occurrences(true)
+                .number_of_values(1),
             Arg::new("V")
                 .long("version")
                 .help("Prints the version, and exits"),
@@ -1088,5 +1094,17 @@ where
         builder = builder.merge_extern_blocks(true);
     }
 
+    if let Some(abi_overrides) = matches.values_of("override-abi") {
+        for abi_override in abi_overrides {
+            let (regex, abi_str) = abi_override
+                .rsplit_once("=")
+                .expect("Invalid ABI override: Missing `=`");
+            let abi = abi_str
+                .parse()
+                .unwrap_or_else(|err| panic!("Invalid ABI override: {}", err));
+            builder = builder.override_abi(abi, regex);
+        }
+    }
+
     Ok((builder, output, verbose))
 }