simics-api-sys: add fallback to detect python headers/lib (1033)

Author: Wenzel

simics-api-sys/build.rs

@@ -450,13 +450,31 @@ pub mod common {
 
             let bindings = Builder::default()
                 .clang_arg(
-                    subdir(base_dir_path.as_ref().join(HOST_DIRNAME).join("include")).and_then(
-                        |p| {
+                    subdir(base_dir_path.as_ref().join(HOST_DIRNAME).join("include"))
+                        .and_then(|p| {
                             p.to_str()
                                 .map(|s| format!("-I{}", s))
                                 .ok_or_else(|| anyhow!("Could not convert path to string"))
-                        },
-                    )?,
+                        })
+                        .or_else(|_| {
+                            // Fallback for Simics 7.28.0+ where Python headers are in separate package (1033)
+                            println!("cargo:warning=Traditional Python include path not found, trying Simics Python package fallback");
+                            let parent_dir = base_dir_path.as_ref().parent().unwrap();
+                            let python_include_path = parent_dir
+                                .join("simics-python-7.10.0")
+                                .join(HOST_DIRNAME)
+                                .join("include");
+                            if python_include_path.exists() {
+                                subdir(&python_include_path)
+                                    .and_then(|p| {
+                                        p.to_str()
+                                            .map(|s| format!("-I{}", s))
+                                            .ok_or_else(|| anyhow!("Could not convert path to string"))
+                                    })
+                            } else {
+                                bail!("Python include directory not found at {}", python_include_path.display())
+                            }
+                        })?,
                 )
                 .clang_arg(format!("-I{}", &wrapper_include_path))
                 .clang_arg("-fretain-comments-from-system-headers")
@@ -778,7 +796,18 @@ pub mod common {
                 .join(HOST_DIRNAME)
                 .join("sys")
                 .join("lib")
-                .canonicalize()?;
+                .canonicalize()
+                .or_else(|_| {
+                    // Fallback for Simics 7.28.0+ where libpython is in separate package (1033)
+                    println!("cargo:warning=Traditional libpython path not found, trying Simics Python package fallback");
+                    let parent_dir = base_dir_path.parent().unwrap();
+                    parent_dir
+                        .join("simics-python-7.10.0")
+                        .join(HOST_DIRNAME)
+                        .join("sys")
+                        .join("lib")
+                        .canonicalize()
+                })?;
 
             let libpython = sys_lib_dir.join(
                 read_dir(&sys_lib_dir)?