cmake: Add FindGSSAPI.cmake

Reviewed-by: Andreas Schneider <asn@cryptomilk.org>

cmake/Modules/FindGSSAPI.cmake

@@ -0,0 +1,78 @@
+# - Try to detect the GSSAPI support
+# Once done this will define
+#
+#  GSSAPI_FOUND - system supports GSSAPI
+#  GSSAPI_INCS - the GSSAPI include directory
+#  GSSAPI_LIBS - the libraries needed to use GSSAPI
+#  GSSAPI_FLAVOR - the type of API - MIT or HEIMDAL
+
+# Copyright (c) 2006, Pino Toscano, <toscano.pino@tiscali.it>
+#
+# Redistribution and use is allowed according to the terms of the BSD license.
+# For details see the accompanying COPYING-CMAKE-SCRIPTS file.
+
+
+if(GSSAPI_LIBS AND GSSAPI_FLAVOR)
+
+  # in cache already
+  set(GSSAPI_FOUND TRUE)
+
+else(GSSAPI_LIBS AND GSSAPI_FLAVOR)
+
+  find_program(KRB5_CONFIG NAMES krb5-config PATHS
+     /opt/local/bin
+     ONLY_CMAKE_FIND_ROOT_PATH               # this is required when cross compiling with cmake 2.6 and ignored with cmake 2.4, Alex
+  )
+  mark_as_advanced(KRB5_CONFIG)
+  
+  #reset vars
+  set(GSSAPI_INCS)
+  set(GSSAPI_LIBS)
+  set(GSSAPI_FLAVOR)
+  
+  if(KRB5_CONFIG)
+  
+    set(HAVE_KRB5_GSSAPI TRUE)
+    exec_program(${KRB5_CONFIG} ARGS --libs gssapi RETURN_VALUE _return_VALUE OUTPUT_VARIABLE GSSAPI_LIBS)
+    if(_return_VALUE)
+      message(STATUS "GSSAPI configure check failed.")
+      set(HAVE_KRB5_GSSAPI FALSE)
+    endif(_return_VALUE)
+  
+    exec_program(${KRB5_CONFIG} ARGS --cflags gssapi RETURN_VALUE _return_VALUE OUTPUT_VARIABLE GSSAPI_INCS)
+    string(REGEX REPLACE "(\r?\n)+$" "" GSSAPI_INCS "${GSSAPI_INCS}")
+    string(REGEX REPLACE " *-I" ";" GSSAPI_INCS "${GSSAPI_INCS}")
+
+    exec_program(${KRB5_CONFIG} ARGS --vendor RETURN_VALUE _return_VALUE OUTPUT_VARIABLE gssapi_flavor_tmp)
+    set(GSSAPI_FLAVOR_MIT)
+    if(gssapi_flavor_tmp MATCHES ".*Massachusetts.*")
+      set(GSSAPI_FLAVOR "MIT")
+    else(gssapi_flavor_tmp MATCHES ".*Massachusetts.*")
+      set(GSSAPI_FLAVOR "HEIMDAL")
+    endif(gssapi_flavor_tmp MATCHES ".*Massachusetts.*")
+  
+    if(NOT HAVE_KRB5_GSSAPI)
+      if (gssapi_flavor_tmp MATCHES "Sun Microsystems.*")
+         message(STATUS "Solaris Kerberos does not have GSSAPI; this is normal.")
+         set(GSSAPI_LIBS)
+         set(GSSAPI_INCS)
+      else(gssapi_flavor_tmp MATCHES "Sun Microsystems.*")
+         message(WARNING "${KRB5_CONFIG} failed unexpectedly.")
+      endif(gssapi_flavor_tmp MATCHES "Sun Microsystems.*")
+    endif(NOT HAVE_KRB5_GSSAPI)
+
+    if(GSSAPI_LIBS) # GSSAPI_INCS can be also empty, so don't rely on that
+      set(GSSAPI_FOUND TRUE)
+      message(STATUS "Found GSSAPI: ${GSSAPI_LIBS}")
+
+      set(GSSAPI_INCS ${GSSAPI_INCS})
+      set(GSSAPI_LIBS ${GSSAPI_LIBS})
+      set(GSSAPI_FLAVOR ${GSSAPI_FLAVOR})
+
+      mark_as_advanced(GSSAPI_INCS GSSAPI_LIBS GSSAPI_FLAVOR)
+
+    endif(GSSAPI_LIBS)
+  
+  endif(KRB5_CONFIG)
+
+endif(GSSAPI_LIBS AND GSSAPI_FLAVOR)