added object suffix option

README.md

@@ -370,7 +370,7 @@ sources = [
 ]
 ```
 
-An option `opts.comple_cmd_fmt` also exists. Its default is `{compiler}
+An option `opts.compile_cmd_fmt` also exists. Its default is `{compiler}
 {compiler_flags} -MD -MF {depfile} -o {object} -c {source}`. Note that if you
 remove the `-MD -MF {depfile}` component, ninja will have no way to discover
 what header files your source file depends on.

src/content_generation/ninja_file.rs

@@ -125,8 +125,14 @@ build $builddir/{name}/dep: mkdir
 
     for source in &target.sources {
         let new_file = source.replace('/', "-");
-        let obj_name = format!("$builddir/{}/obj/{}.o", name, new_file);
-        let dep_name = format!("$builddir/{}/dep/{}.o.d", name, new_file);
+        let obj_name = format!(
+            "$builddir/{}/obj/{}{}",
+            name, new_file, target.opts.object_suffix
+        );
+        let dep_name = format!(
+            "$builddir/{}/dep/{}{}.d",
+            name, new_file, target.opts.object_suffix
+        );
         ret.push_str(&format!(
             "build {}: cc_{} {}\n  dep = {}\n",
             obj_name, name, source, dep_name

src/deser.rs

@@ -23,6 +23,7 @@ pub struct DeserTargetOptions {
     pub default: Option<bool>,
     pub compile_cmd_fmt: Option<String>,
     pub link_cmd_fmt: Option<String>,
+    pub object_suffix: Option<String>,
 }
 
 #[derive(Debug, Clone, Deserialize)]

src/parse_deser/target.rs

@@ -24,13 +24,13 @@ impl<'a> Target<'a> {
         ret.opts = opts.clone();
 
         if let Some(parent) = parent {
-            if let None = deser.outfile {
+            if deser.outfile.is_none() {
                 ret.outfile = parent.outfile;
             }
-            if let None = deser.compiler {
+            if deser.compiler.is_none() {
                 ret.compiler = parent.compiler;
             }
-            if let None = deser.linker {
+            if deser.linker.is_none() {
                 ret.linker = parent.linker;
             }
             for string in parent.compiler_flags.clone() {
@@ -60,11 +60,9 @@ impl<'a> Target<'a> {
         }
         if let Some(v) = &deser.linker {
             ret.linker = v;
-        } else {
-            if let Some(v) = &deser.compiler {
+        } else if let Some(v) = &deser.compiler {
             ret.linker = v;
         }
-        }
         if let Some(v) = &deser.linker_flags {
             for string in v {
                 ret.linker_flags.push(string);

src/parse_deser/target_options.rs

@@ -8,6 +8,7 @@ pub struct TargetOptions<'a> {
     pub depend_on: Vec<&'a str>,
     pub compile_cmd_fmt: &'a str,
     pub link_cmd_fmt: &'a str,
+    pub object_suffix: &'a str,
 }
 
 impl<'a> From<&'a DeserTargetOptions> for TargetOptions<'a> {
@@ -40,6 +41,10 @@ impl<'a> From<&'a DeserTargetOptions> for TargetOptions<'a> {
             ret.link_cmd_fmt = v;
         }
 
+        if let Some(v) = &value.object_suffix {
+            ret.object_suffix = v;
+        }
+
         ret
     }
 }
@@ -54,6 +59,7 @@ impl<'a> TargetOptions<'a> {
             compile_cmd_fmt:
                 "{compiler} {compiler_flags} -MD -MF {depfile} -o {object} -c {source}",
             link_cmd_fmt: "{linker} {linker_flags} -o {outfile} {objects} {linker_libs}",
+            object_suffix: ".o",
         }
     }
 }