Fix checks for crypto algorithms in Visual Studio builds.

Checks were failing because /SAFESEH was being used and because ssize_t was not defined.

CMakeLists.txt

@@ -564,7 +564,7 @@ MACRO(CHECK_CRYPTO ALGORITHMS IMPLEMENTATION)
         # Probe the local implementation for whether this
 	# crypto implementation is available on this platform.
 	SET(TRY_CRYPTO_REQUIRED_INCLUDES
-	  "-DINCLUDE_DIRECTORIES:STRING=${CMAKE_CURRENT_SOURCE_DIR}/libarchive;${CMAKE_BINARY_DIR}${CMAKE_FILES_DIRECTORY}/CMakeTmp")
+	  "-DINCLUDE_DIRECTORIES:STRING=${CMAKE_BINARY_DIR};${CMAKE_CURRENT_SOURCE_DIR}/libarchive;${CMAKE_BINARY_DIR}${CMAKE_FILES_DIRECTORY}/CMakeTmp")
 	SET(TRY_CRYPTO_REQUIRED_LIBS)
 	IF ("${IMPLEMENTATION}" MATCHES "^OPENSSL$" AND OPENSSL_FOUND)
 	    SET(TRY_CRYPTO_REQUIRED_INCLUDES
@@ -604,10 +604,16 @@ main(int argc, char **argv)
 	FILE(WRITE "${CMAKE_BINARY_DIR}${CMAKE_FILES_DIRECTORY}/CMakeTmp/check_crypto_md.c" "${SOURCE}")
 	MESSAGE(STATUS "Checking support for ARCHIVE_CRYPTO_${ALGORITHM}_${IMPLEMENTATION}")
 
+    IF(CMAKE_REQUIRED_LINKER_FLAGS)
+      SET(CHECK_CRYPTO_ADD_LINKER_FLAGS
+        "-DCMAKE_EXE_LINKER_FLAGS:STRING=${CMAKE_REQUIRED_LINKER_FLAGS} -DCMAKE_SHARED_LINKER_FLAGS:STRING=${CMAKE_REQUIRED_LINKER_FLAGS} -DCMAKE_MODULE_LINKER_FLAGS:STRING=${CMAKE_REQUIRED_LINKER_FLAGS}")
+    ELSE(CMAKE_REQUIRED_LINKER_FLAGS)
+      SET(CHECK_CRYPTO_ADD_LINKER_FLAGS)
+    ENDIF(CMAKE_REQUIRED_LINKER_FLAGS)
 	TRY_COMPILE(ARCHIVE_CRYPTO_${ALGORITHM}_${IMPLEMENTATION}
 	  ${CMAKE_BINARY_DIR}
 	  ${CMAKE_BINARY_DIR}${CMAKE_FILES_DIRECTORY}/CMakeTmp/check_crypto_md.c
-	  CMAKE_FLAGS
+	  CMAKE_FLAGS ${CHECK_CRYPTO_ADD_LINKER_FLAGS}
 	   "${TRY_CRYPTO_REQUIRED_LIBS}"
 	   "${TRY_CRYPTO_REQUIRED_INCLUDES}"
 	  OUTPUT_VARIABLE OUTPUT)
@@ -684,10 +690,16 @@ main(int argc, char **argv)
 	FILE(WRITE "${SOURCE_FILE}" "${SOURCE}")
 	MESSAGE(STATUS "Checking support for ARCHIVE_CRYPTO_${CRYPTO}_WIN")
 
+    IF(CMAKE_REQUIRED_LINKER_FLAGS)
+      SET(CHECK_CRYPTO_WIN_ADD_LINKER_FLAGS
+        "-DCMAKE_EXE_LINKER_FLAGS:STRING=${CMAKE_REQUIRED_LINKER_FLAGS} -DCMAKE_SHARED_LINKER_FLAGS:STRING=${CMAKE_REQUIRED_LINKER_FLAGS} -DCMAKE_MODULE_LINKER_FLAGS:STRING=${CMAKE_REQUIRED_LINKER_FLAGS}")
+    ELSE(CMAKE_REQUIRED_LINKER_FLAGS)
+      SET(CHECK_CRYPTO_WIN_ADD_LINKER_FLAGS)
+    ENDIF(CMAKE_REQUIRED_LINKER_FLAGS)
 	TRY_COMPILE(ARCHIVE_CRYPTO_${CRYPTO}_WIN
 	  ${CMAKE_BINARY_DIR}
 	  ${SOURCE_FILE}
-	  CMAKE_FLAGS "-DINCLUDE_DIRECTORIES:STRING=${CMAKE_CURRENT_SOURCE_DIR}/libarchive"
+	  CMAKE_FLAGS "-DINCLUDE_DIRECTORIES:STRING=${CMAKE_BINARY_DIR};${CMAKE_CURRENT_SOURCE_DIR}/libarchive" ${CHECK_CRYPTO_WIN_ADD_LINKER_FLAGS}
 	  OUTPUT_VARIABLE OUTPUT)
 
 	IF (ARCHIVE_CRYPTO_${CRYPTO}_WIN)

libarchive/archive_windows.h

@@ -72,6 +72,7 @@
 #endif
 #define NOCRYPT
 #include <windows.h>
+#include <config.h>
 //#define	EFTYPE 7
 
 #if defined(__BORLANDC__)