Fix build with static OpenSSL libraries on Windowstopic/windows-static-linking-without-pkg-config

OpenSSL <= 1.0.2 requires gdi32 for RAND_screen(). OpenSSL >= 1.1.0 no
longer has RAND_screen() but it now requires crypt32. If pkg-config is
usable, they are automatically linked, but if it is not, configuring
Ruby/OpenSSL fails.

Fixes: https://bugs.ruby-lang.org/issues/13080

1 files changed, 6 insertions, 0 deletions

diff --git a/ext/openssl/extconf.rb b/ext/openssl/extconf.rb
index 7033b0e2..60bd518e 100644
--- a/ext/openssl/extconf.rb
+++ b/ext/openssl/extconf.rb
@@ -37,6 +37,12 @@ have_library("socket", "socket")
 Logging::message "=== Checking for required stuff... ===\n"
 result = pkg_config("openssl") && have_header("openssl/ssl.h")
 unless result
+  if $mswin || $mingw
+    # required for static OpenSSL libraries
+    have_library("gdi32") # OpenSSL <= 1.0.2 (for RAND_screen())
+    have_library("crypt32")
+  end
+
   result = have_header("openssl/ssl.h")
   result &&= %w[crypto libeay32].any? {|lib| have_library(lib, "CRYPTO_malloc")}
   result &&= %w[ssl ssleay32].any? {|lib| have_library(lib, "SSL_new")}