Merge branch 'master' of github.com:sfackler/rust-openssl

1 files changed, 18 insertions, 0 deletions

diff --git a/README.md b/README.md
index eee09f52..9a6d41c8 100644
--- a/README.md
+++ b/README.md
@@ -73,6 +73,18 @@ installation via an environment variable:
 set OPENSSL_DIR=C:\OpenSSL-Win64
 ```
 
+Note that this OpenSSL distribution does not ship with any root certificates.
+So to make requests to servers on the internet, you have to install them
+manually. Download the [cacert.pem file from here], copy it somewhere safe
+(`C:\OpenSSL-Win64\certs` is a good place) and point the `SSL_CERT_FILE`
+environment variable there:
+
+```
+set SSL_CERT_FILE=C:\OpenSSL-Win64\certs\cacert.pem
+```
+
+[cacert.pem file from here]: https://curl.haxx.se/docs/caextract.html
+
 After that, you're just a `cargo build` away!
 
 ### Windows GNU (MinGW)
@@ -102,6 +114,12 @@ The build script can be configured via environment variables:
 * `OPENSSL_DIR` - If specified, a directory that will be used to find
   OpenSSL installation. It's expected that under this directory the `include`
   folder has header files and a `lib` folder has the runtime libraries.
+* `OPENSSL_LIB_DIR` - If specified, a directory that will be used to find
+  OpenSSL libraries. Overrides the `lib` folder implied by `OPENSSL_DIR`
+  (if specified).
+* `OPENSSL_INCLUDE_DIR` - If specified, a directory that will be used to find
+  OpenSSL header files. Overrides the `include` folder implied by `OPENSSL_DIR`
+  (if specified).
 * `OPENSSL_STATIC` - If specified, OpenSSL libraries will be statically rather
   than dynamically linked.