Bring back the Windows linking code

georust · Feb 17, 2018 · 76000c6 · 76000c6
1 parent 809a5b8
commit 76000c6
Showing 1 changed file with 42 additions and 4 deletions.
diff --git a/gdal-sys/build.rs b/gdal-sys/build.rs
@@ -7,12 +7,50 @@ use std::env;
 use std::path::PathBuf;
 
 fn main() {
+    #[cfg(windows)]
+    {
+        use std::path::Path;
+
+        // get the path to GDAL_HOME
+        let home_path = env::var("GDAL_HOME").expect("Environment variable $GDAL_HOME not found!");
+
+        // detect the path to gdal_i.lib (works for MSVC and GNU)
+        let lib_suffix = "_i";
+        let lib_search_path = Path::new(&home_path).join("lib");
+        let lib_path = lib_search_path.join(&format!("{}{}.lib", lib_name, lib_suffix));
+
+        if lib_search_path.exists() && lib_path.exists() {
+            println!("cargo:rustc-link-search={}", lib_search_path.to_string_lossy());
+            println!("cargo:rustc-link-lib={}={}", link_type, format!("{}{}",lib_name, lib_suffix));
+        } else {
+            #[cfg(target_env="msvc")]
+            {
+                panic!("windows-msvc requires gdal_i.lib to be found in $GDAL_HOME\\lib.");
+            }
+
+            #[cfg(target_env="gnu")]
+            {
+                // detect if a gdal{version}.dll is available
+                let versions = [201, 200, 111, 110];
+                let bin_path = Path::new(&home_path).join("bin");
+                if let Some(version) = versions.iter().find(|v| bin_path.join(&format!("{}{}.dll", lib_name, v)).exists()){
+                    println!("cargo:rustc-link-search={}", bin_path.to_string_lossy());
+                    println!("cargo:rustc-link-lib={}={}", link_type, format!("{}{}",lib_name, version));
+                }
+                else {
+                    panic!("windows-gnu requires either gdal_i.lib in $GDAL_HOME\\lib OR gdal{version}.dll in $GDAL_HOME\\bin.");
+                }
+            }
+        }
+    }
+
     let mut builder = Builder::default();
 
-    let gdal = Config::new().probe("gdal").unwrap();
-    for path in &gdal.include_paths {
-        builder = builder.clang_arg("-I");
-        builder = builder.clang_arg(path.to_str().unwrap());
+    if let Ok(gdal) = Config::new().probe("gdal") {
+        for path in &gdal.include_paths {
+            builder = builder.clang_arg("-I");
+            builder = builder.clang_arg(path.to_str().unwrap());
+        }
     }
 
     let bindings = builder