From b3faed0f75129e3878d68995d280dfce5dde6edc Mon Sep 17 00:00:00 2001
From: Jim McGrath <jimmc2@gmail.com>
Date: Sun, 28 May 2017 06:15:47 -0500
Subject: [PATCH] only depend on vcpkg for cfg(target_env = "msvc")

---
 libsqlite3-sys/Cargo.toml | 2 ++
 libsqlite3-sys/build.rs   | 6 +++---
 2 files changed, 5 insertions(+), 3 deletions(-)

diff --git a/libsqlite3-sys/Cargo.toml b/libsqlite3-sys/Cargo.toml
index 272cc0c..83b0f08 100644
--- a/libsqlite3-sys/Cargo.toml
+++ b/libsqlite3-sys/Cargo.toml
@@ -25,4 +25,6 @@ min_sqlite_version_3_7_16 = ["pkg-config", "vcpkg"]
 bindgen = { version = "0.21", optional = true }
 pkg-config = { version = "0.3", optional = true }
 gcc = { version = "0.3", optional = true }
+
+[target.'cfg(target_env = "msvc")'.build-dependencies]
 vcpkg = { version = "0.2", optional = true }
diff --git a/libsqlite3-sys/build.rs b/libsqlite3-sys/build.rs
index b37deaf..67216ee 100644
--- a/libsqlite3-sys/build.rs
+++ b/libsqlite3-sys/build.rs
@@ -42,7 +42,7 @@ mod build {
 mod build {
     extern crate pkg_config;
 
-    #[cfg(feature = "vcpkg")]
+    #[cfg(all(feature = "vcpkg", target_env = "msvc"))]
     extern crate vcpkg;
 
     use std::env;
@@ -107,7 +107,7 @@ mod build {
         }
     }
 
-    #[cfg(feature = "vcpkg")]
+    #[cfg(all(feature = "vcpkg", target_env = "msvc"))]
     fn try_vcpkg() -> Option<HeaderLocation> {
         // See if vcpkg can find it.
         if let Ok(mut lib) = vcpkg::Config::new().probe("sqlite3") {
@@ -119,7 +119,7 @@ mod build {
         None
     }
 
-    #[cfg(not(feature = "vcpkg"))]
+    #[cfg(not(all(feature = "vcpkg", target_env = "msvc")))]
     fn try_vcpkg() -> Option<HeaderLocation> {
         None
     }