nasm: define the __NASM__ variable

This variable is defined by default in nasm and it can be used for
assembler compatibility code.

Signed-off-by: Miquel Sabaté Solà <mssola@mssola.com>

1 files changed, 3 insertions, 0 deletions

diff --git a/crates/nasm/src/main.rs b/crates/nasm/src/main.rs
index edf1af3..64e88ed 100644
--- a/crates/nasm/src/main.rs
+++ b/crates/nasm/src/main.rs
@@ -150,6 +150,9 @@ fn parse_arguments() -> Args {
         die("you need to specify a source file".to_string());
     }
 
+    // If everything is ok, add the default defines for nasm.
+    res.defines.push((String::from("__NASM__"), 1));
+
     res
 }