Try #92:

Cargo.toml

@@ -26,9 +26,8 @@ members = ["proj-sys"]
 [features]
 default = ["geo-types"]
 bundled_proj = [ "proj-sys/bundled_proj" ]
-bundled_proj_tiff = [ "proj-sys/bundled_proj_tiff" ]
 pkg_config = [ "proj-sys/pkg_config" ]
-network = ["bundled_proj_tiff", "reqwest"]
+network = ["reqwest"]
 
 [dev-dependencies]
 approx = "0.3"

proj-sys/CHANGES.md

@@ -1,3 +1,11 @@
+# UNRELEASED
+
+- BREAKING: Remove `bundled_proj_tiff` feature and assume system libproj has
+  the default enabled tiff support. Otherwise, the current setup would
+  unnecessarily build libproj from source in some cases, e.g. the geo crate's
+  proj network integration would compile libproj from source.
+    - <https://github.com/georust/proj/pull/92>
+
 # 0.20.1
 - Fix docs to refer to correct libproj version
 

proj-sys/Cargo.toml

@@ -24,7 +24,6 @@ nobuild = []
 bundled_proj = []
 # `pkg_config` feature is deprecated and does nothing
 pkg_config = []
-bundled_proj_tiff = ["bundled_proj"]
 
 [package.metadata.docs.rs]
 features = [ "nobuild" ] # This feature will be enabled during the docs.rs build

proj-sys/build.rs

@@ -95,17 +95,15 @@ fn build_from_source() -> Result<std::path::PathBuf, Box<dyn std::error::Error>>
     config.define("BUILD_PROJINFO", "OFF");
     config.define("BUILD_PROJSYNC", "OFF");
     config.define("ENABLE_CURL", "OFF");
-    let tiff_support = cfg!(feature = "bundled_proj_tiff");
-    config.define("ENABLE_TIFF", if tiff_support { "ON" } else { "OFF" });
     let proj = config.build();
     // Tell cargo to tell rustc to link libproj, and where to find it
     // libproj will be built in $OUT_DIR/lib
-    
+
     //proj likes to create proj_d when configured as debug and on MSVC, so link to that one if it exists
     if proj.join("lib").join("proj_d.lib").exists() {
-      println!("cargo:rustc-link-lib=static=proj_d");
+        println!("cargo:rustc-link-lib=static=proj_d");
     } else {
-      println!("cargo:rustc-link-lib=static=proj");
+        println!("cargo:rustc-link-lib=static=proj");
     }
     println!(
         "cargo:rustc-link-search=native={}",
@@ -121,9 +119,7 @@ fn build_from_source() -> Result<std::path::PathBuf, Box<dyn std::error::Error>>
     );
     // The PROJ library needs SQLite and the C++ standard library.
     println!("cargo:rustc-link-lib=dylib=sqlite3");
-    if tiff_support {
-        println!("cargo:rustc-link-lib=dylib=tiff");
-    }
+    println!("cargo:rustc-link-lib=dylib=tiff");
     if cfg!(target_os = "linux") {
         println!("cargo:rustc-link-lib=dylib=stdc++");
     } else if cfg!(target_os = "macos") {