Initialize C libs before main, using a class variable (workaround unt…

…il solved)

src/big/lib_gmp.cr

@@ -166,8 +166,15 @@ lib LibGMP
   fun set_memory_functions = __gmp_set_memory_functions(malloc : SizeT -> Void*, realloc : Void*, SizeT, SizeT -> Void*, free : Void*, SizeT ->)
 end
 
-LibGMP.set_memory_functions(
-  ->(size) { GC.malloc(size) },
-  ->(ptr, old_size, new_size) { GC.realloc(ptr, new_size) },
-  ->(ptr, size) { GC.free(ptr) }
-)
+# :nodoc:
+struct BigInt::Init
+  # Workaround to force this initialization as soon as the program starts, before main
+  @@init = begin
+    LibGMP.set_memory_functions(
+      ->(size) { GC.malloc(size) },
+      ->(ptr, old_size, new_size) { GC.realloc(ptr, new_size) },
+      ->(ptr, size) { GC.free(ptr) }
+    )
+    nil
+  end
+end

src/openssl/lib_ssl.cr

@@ -42,3 +42,15 @@ lib LibSSL
   fun ssl_ctx_use_privatekey_file = SSL_CTX_use_PrivateKey_file(ctx : SSLContext, file : UInt8*, filetype : SSLFileType) : Int
   fun ssl_set_bio = SSL_set_bio(handle : SSL, rbio : LibCrypto::Bio*, wbio : LibCrypto::Bio*)
 end
+
+# :nodoc:
+module OpenSSL::Init
+  # Workaround to force this initialization as soon as the program starts, before main
+  @@init = begin
+    LibSSL.ssl_library_init
+    LibSSL.ssl_load_error_strings
+    LibCrypto.openssl_add_all_algorithms
+    LibCrypto.err_load_crypto_strings
+    nil
+  end
+end

src/openssl/openssl.cr

@@ -13,11 +13,6 @@ module OpenSSL
       super(msg)
     end
   end
-
-  LibSSL.ssl_library_init
-  LibSSL.ssl_load_error_strings
-  LibCrypto.openssl_add_all_algorithms
-  LibCrypto.err_load_crypto_strings
 end
 
 require "./bio"

src/xml/libxml2.cr

@@ -252,15 +252,22 @@ lib LibXML
   fun xmlGetNsList(doc : Doc*, node : Node*) : NS**
 end
 
-LibXML.xmlGcMemSetup(
-  ->GC.free,
-  ->GC.malloc(LibC::SizeT),
-  ->GC.malloc(LibC::SizeT),
-  ->GC.realloc(Void*, LibC::SizeT),
-  ->(str) {
-    len = LibC.strlen(str)
-    copy = Pointer(UInt8).malloc(len)
-    copy.copy_from(str, len)
-    copy
-  }
-)
+# :nodoc:
+module XML::Init
+  # Workaround to force this initialization as soon as the program starts, before main
+  @@init = begin
+    LibXML.xmlGcMemSetup(
+      ->GC.free,
+      ->GC.malloc(LibC::SizeT),
+      ->GC.malloc(LibC::SizeT),
+      ->GC.realloc(Void*, LibC::SizeT),
+      ->(str) {
+        len = LibC.strlen(str)
+        copy = Pointer(UInt8).malloc(len)
+        copy.copy_from(str, len)
+        copy
+      }
+    )
+    nil
+  end
+end