Add initial support for mingw64.

PR: 1693
Submitted by: Alon Bar-Lev

Configure

@@ -496,6 +496,7 @@ my %table=(
 
 # MinGW
 "mingw", "gcc:-mno-cygwin -DL_ENDIAN -fomit-frame-pointer -O3 -march=i486 -Wall:::MINGW32:-lws2_32 -lgdi32:BN_LLONG ${x86_gcc_des} ${x86_gcc_opts} EXPORT_VAR_AS_FN:${x86_coff_asm}:win32:cygwin-shared:-D_WINDLL -DOPENSSL_USE_APPLINK:-mno-cygwin:.dll.a",
+"mingw64", "gcc:-mno-cygwin -DL_ENDIAN -O3 -Wall -DWIN32_LEAN_AND_MEAN -DUNICODE -D_UNICODE:::MINGW64:-lws2_32 -lgdi32:SIXTY_FOUR_BIT RC4_CHUNK_LL DES_INT EXPORT_VAR_AS_FN:${no_asm}:win32:cygwin-shared:-D_WINDLL:-mno-cygwin:.dll.a",
 
 # UWIN 
 "UWIN", "cc:-DTERMIOS -DL_ENDIAN -O -Wall:::UWIN::BN_LLONG ${x86_gcc_des} ${x86_gcc_opts}:${no_asm}:win32",
@@ -969,7 +970,7 @@ foreach (sort (keys %disabled))
 
 my $IsMK1MF=scalar grep /^$target$/,@MK1MF_Builds;
 
-$exe_ext=".exe" if ($target eq "Cygwin" || $target eq "DJGPP" || $target eq "mingw");
+$exe_ext=".exe" if ($target eq "Cygwin" || $target eq "DJGPP" || $target =~ /^mingw/);
 $exe_ext=".nlm" if ($target =~ /netware/);
 $exe_ext=".pm"  if ($target =~ /vos/);
 $openssldir="/usr/local/ssl" if ($openssldir eq "" and $prefix eq "");

TABLE

@@ -3570,6 +3570,36 @@ $shared_extension = .dll.a
 $ranlib       = 
 $arflags      = 
 
+*** mingw64
+$cc           = gcc
+$cflags       = -mno-cygwin -DL_ENDIAN -O3 -Wall -DWIN32_LEAN_AND_MEAN -DUNICODE -D_UNICODE
+$unistd       = 
+$thread_cflag = 
+$sys_id       = MINGW64
+$lflags       = -lws2_32 -lgdi32
+$bn_ops       = SIXTY_FOUR_BIT RC4_CHUNK_LL DES_INT EXPORT_VAR_AS_FN
+$cpuid_obj    = 
+$bn_obj       = 
+$des_obj      = 
+$aes_obj      = 
+$bf_obj       = 
+$md5_obj      = 
+$sha1_obj     = 
+$cast_obj     = 
+$rc4_obj      = 
+$rmd160_obj   = 
+$rc5_obj      = 
+$wp_obj       = 
+$cmll_obj     = 
+$perlasm_scheme = void
+$dso_scheme   = win32
+$shared_target= cygwin-shared
+$shared_cflag = -D_WINDLL
+$shared_ldflag = -mno-cygwin
+$shared_extension = .dll.a
+$ranlib       = 
+$arflags      = 
+
 *** ncr-scde
 $cc           = cc
 $cflags       = -O6 -Xa -Hoff=BEHAVED -686 -Hwide -Hiw

engines/e_aep.c

@@ -57,7 +57,7 @@
 #include <string.h>
 
 #include <openssl/e_os2.h>
-#if !defined(OPENSSL_SYS_MSDOS) || defined(__DJGPP__)
+#if !defined(OPENSSL_SYS_MSDOS) || defined(__DJGPP__) || defined(__MINGW32__)
 #include <sys/types.h>
 #include <unistd.h>
 #else