cmake: Link against gpg-error

Signed-off-by: Jakub Jelen <jjelen@redhat.com>
Reviewed-by: Andreas Schneider <asn@cryptomilk.org>

cmake/Modules/FindGCrypt.cmake

@@ -49,7 +49,15 @@ find_library(GCRYPT_LIBRARY
     PATH_SUFFIXES
         lib
 )
-set(GCRYPT_LIBRARIES ${GCRYPT_LIBRARY})
+find_library(GCRYPT_ERROR_LIBRARY
+    NAMES
+        gpg-error
+        libgpg-error-0
+        libgpg-error6-0
+    HINTS
+        ${_GCRYPT_ROOT_HINTS_AND_PATHS}
+)
+set(GCRYPT_LIBRARIES ${GCRYPT_LIBRARY}  ${GCRYPT_ERROR_LIBRARY})
 
 if (GCRYPT_INCLUDE_DIR)
     file(STRINGS "${GCRYPT_INCLUDE_DIR}/gcrypt.h" _gcrypt_version_str REGEX "^#define GCRYPT_VERSION \"[0-9]+\\.[0-9]+\\.[0-9]")

src/CMakeLists.txt

@@ -48,7 +48,7 @@ if (MBEDTLS_CRYPTO_LIBRARY)
   )
 endif (MBEDTLS_CRYPTO_LIBRARY)
 
-if (GCRYPT_LIBRARY)
+if (GCRYPT_LIBRARIES)
   set(LIBSSH_PRIVATE_INCLUDE_DIRS
     ${LIBSSH_PRIVATE_INCLUDE_DIRS}
     ${GCRYPT_INCLUDE_DIR}
@@ -56,9 +56,8 @@ if (GCRYPT_LIBRARY)
 
   set(LIBSSH_LINK_LIBRARIES
     ${LIBSSH_LINK_LIBRARIES}
-    ${GCRYPT_LIBRARY}
-  )
-endif (GCRYPT_LIBRARY)
+    ${GCRYPT_LIBRARIES})
+endif()
 
 if (WITH_ZLIB)
   set(LIBSSH_PRIVATE_INCLUDE_DIRS