Adapt mingw config for newer mingw environment. Note modified conditional

compilation in e_capi.c.
PR: 2113

Configure

@@ -503,7 +503,7 @@ my %table=(
 "BC-32","bcc32::::WIN32::BN_LLONG DES_PTR RC4_INDEX EXPORT_VAR_AS_FN:${no_asm}:win32",
 
 # MinGW
-"mingw", "gcc:-mno-cygwin -DL_ENDIAN -DOPENSSL_NO_CAPIENG -fomit-frame-pointer -O3 -march=i486 -Wall:::MINGW32:-lws2_32 -lgdi32:BN_LLONG ${x86_gcc_des} ${x86_gcc_opts} EXPORT_VAR_AS_FN:${x86_asm}:coff:win32:cygwin-shared:-D_WINDLL -DOPENSSL_USE_APPLINK:-mno-cygwin:.dll.a",
+"mingw", "gcc:-mno-cygwin -DL_ENDIAN -DWIN32_LEAN_AND_MEAN -fomit-frame-pointer -O3 -march=i486 -Wall:::MINGW32:-lws2_32 -lgdi32 -lcrypt32:BN_LLONG ${x86_gcc_des} ${x86_gcc_opts} EXPORT_VAR_AS_FN:${x86_asm}:coff:win32:cygwin-shared:-D_WINDLL -DOPENSSL_USE_APPLINK:-mno-cygwin:.dll.a",
 # As for OPENSSL_USE_APPLINK. Applink makes it possible to use .dll
 # compiled with one compiler with application compiled with another
 # compiler. It's possible to engage Applink support in mingw64 build,

TABLE

@@ -3877,11 +3877,11 @@ $multilib     = 64
 
 *** mingw
 $cc           = gcc
-$cflags       = -mno-cygwin -DL_ENDIAN -DOPENSSL_NO_CAPIENG -fomit-frame-pointer -O3 -march=i486 -Wall
+$cflags       = -mno-cygwin -DL_ENDIAN -DWIN32_LEAN_AND_MEAN -fomit-frame-pointer -O3 -march=i486 -Wall
 $unistd       = 
 $thread_cflag = 
 $sys_id       = MINGW32
-$lflags       = -lws2_32 -lgdi32
+$lflags       = -lws2_32 -lgdi32 -lcrypt32
 $bn_ops       = BN_LLONG DES_PTR DES_RISC1 DES_UNROLL RC4_INDEX MD2_INT EXPORT_VAR_AS_FN
 $cpuid_obj    = x86cpuid.o
 $bn_obj       = bn-586.o co-586.o x86-mont.o

engines/e_capi.c

@@ -71,6 +71,22 @@
 
 #include <wincrypt.h>
 
+/*
+ * This module uses several "new" interfaces, among which is
+ * CertGetCertificateContextProperty. CERT_KEY_PROV_INFO_PROP_ID is
+ * one of possible values you can pass to function in question. By
+ * checking if it's defined we can see if wincrypt.h and accompanying
+ * crypt32.lib are in shape. Yes, it's rather "weak" test and if
+ * compilation fails, then re-configure with -DOPENSSL_NO_CAPIENG.
+ */
+#ifdef CERT_KEY_PROV_INFO_PROP_ID
+# define __COMPILE_CAPIENG
+#endif /* CERT_KEY_PROV_INFO_PROP_ID */
+#endif /* OPENSSL_NO_CAPIENG */
+#endif /* OPENSSL_SYS_WIN32 */
+
+#ifdef __COMPILE_CAPIENG
+
 #undef X509_EXTENSIONS
 #undef X509_CERT_PAIR
 
@@ -1784,12 +1800,13 @@ static int cert_select_dialog(ENGINE *e, SSL *ssl, STACK_OF(X509) *certs)
 	}
 #endif
 
-#endif
-#else /* !WIN32 */
+#else /* !__COMPILE_CAPIENG */
 #include <openssl/engine.h>
 #ifndef OPENSSL_NO_DYNAMIC_ENGINE
 OPENSSL_EXPORT
 int bind_engine(ENGINE *e, const char *id, const dynamic_fns *fns) { return 0; }
 IMPLEMENT_DYNAMIC_CHECK_FN()
+#else
+void ENGINE_load_capi(void){}
 #endif
 #endif