fall back to hard coded if not found

Author: JR-1991

build.rs

@@ -32,7 +32,7 @@ const WITH_EXPAT: &str = "ON";
 
 /// Linux targets
 const LINUX_INCLUDE_PATHS: &[&str] = &["/usr/include/sbml", "/usr/include/libxml2"];
-const LINUX_LINK_PATHS: &[&str] = &["/usr/lib"];
+const LINUX_LINK_PATHS: &[&str] = &["/usr/lib", "/usr/lib/x86_64-linux-gnu"];
 const LINUX_LINK_LIBS: &[&str] = &["sbml", "xml2"];
 
 /// Main build script function that orchestrates the build process
@@ -89,13 +89,25 @@ fn link_to_libraries() -> miette::Result<Vec<PathBuf>> {
         let link_libs = libsbml_vcpkg.found_names;
         (include_paths, link_paths, link_libs)
     } else if cfg!(target_os = "linux") {
-        let link_paths = LINUX_LINK_PATHS.iter().map(|p| PathBuf::from(p)).collect();
-        let include_paths = LINUX_INCLUDE_PATHS
-            .iter()
-            .map(|p| PathBuf::from(p))
-            .collect();
-        let link_libs = LINUX_LINK_LIBS.iter().map(|l| l.to_string()).collect();
-        (include_paths, link_paths, link_libs)
+        // Try using pkg-config first as it's more reliable
+        match pkg_config::Config::new().probe("libsbml") {
+            Ok(libsbml_pkg_config) => {
+                let link_paths = libsbml_pkg_config.link_paths;
+                let include_paths = libsbml_pkg_config.include_paths;
+                let link_libs = libsbml_pkg_config.libs;
+                (include_paths, link_paths, link_libs)
+            }
+            // Fall back to hardcoded paths if pkg-config fails
+            Err(_) => {
+                let link_paths = LINUX_LINK_PATHS.iter().map(|p| PathBuf::from(p)).collect();
+                let include_paths = LINUX_INCLUDE_PATHS
+                    .iter()
+                    .map(|p| PathBuf::from(p))
+                    .collect();
+                let link_libs = LINUX_LINK_LIBS.iter().map(|l| l.to_string()).collect();
+                (include_paths, link_paths, link_libs)
+            }
+        }
     } else if cfg!(target_os = "macos") {
         let libsbml_pkg_config = pkg_config::Config::new()
             .probe("libsbml")