MSVC: Enable building ocspcheck.

- Add `STDIN_FILENO` to compat unistd header.
- Use quotes to include compat getopt header in the compat unistd.
- Export additional symbols needed by ocspcheck (optarg, optind,
  ftruncate)

apps/ocspcheck/CMakeLists.txt

@@ -1,5 +1,3 @@
-if(NOT MSVC)
-
 set(
 	OCSPCHECK_SRC
 	http.c
@@ -33,5 +31,3 @@ if(ENABLE_LIBRESSL_INSTALL)
 	install(FILES ocspcheck.8 DESTINATION ${CMAKE_INSTALL_MANDIR}/man8)
 
 endif(ENABLE_LIBRESSL_INSTALL)
-
-endif()

crypto/CMakeLists.txt

@@ -778,6 +778,8 @@ endif()
 if(NOT HAVE_GETOPT)
 	set(CRYPTO_SRC ${CRYPTO_SRC} compat/getopt_long.c)
 	set(EXTRA_EXPORT ${EXTRA_EXPORT} getopt)
+	set(EXTRA_EXPORT ${EXTRA_EXPORT} optarg)
+	set(EXTRA_EXPORT ${EXTRA_EXPORT} optind)
 endif()
 
 if(NOT HAVE_GETPAGESIZE)

include/compat/unistd.h

@@ -23,6 +23,7 @@ ssize_t pwrite(int d, const void *buf, size_t nbytes, off_t offset);
 #include <io.h>
 #include <process.h>
 
+#define STDIN_FILENO    0
 #define STDOUT_FILENO   1
 #define STDERR_FILENO   2
 
@@ -65,7 +66,7 @@ int getentropy(void *buf, size_t buflen);
 #endif
 
 #ifndef HAVE_GETOPT
-#include <getopt.h>
+#include "getopt.h"
 #endif
 
 #ifndef HAVE_GETPAGESIZE

tls/CMakeLists.txt

@@ -22,6 +22,8 @@ if(WIN32)
 		compat/pread.c
 		compat/pwrite.c
 	)
+
+	set(LIBTLS_EXTRA_EXPORT ${LIBTLS_EXTRA_EXPORT} ftruncate)
 endif()
 
 if(NOT "${OPENSSLDIR}" STREQUAL "")