remove deprecated io build options and error out if used

Author: rem1776

CMakeLists.txt

@@ -65,7 +65,6 @@ option(PORTABLE_KINDS        "Enable compiler definition -DPORTABLE_KINDS"
 option(GFS_PHYS              "Enable compiler definition -DGFS_PHYS"              OFF)
 option(LARGEFILE             "Enable compiler definition -Duse_LARGEFILE"         OFF)
 option(WITH_YAML             "Enable compiler definition -Duse_yaml"              OFF)
-option(USE_DEPRECATED_IO     "THIS OPTION HAS NO EFFECT AND WILL BE REMOVED IN A FUTURE RELEASE"   OFF)
 
 if(32BIT)
   list(APPEND kinds "r4")

configure.ac

@@ -98,17 +98,6 @@ AS_IF([test ${enable_8byte_int:-no} = yes],
   [enable_8byte_int=yes],
   [enable_8byte_int=no])
 
-AC_ARG_ENABLE([deprecated-io],
-  [AS_HELP_STRING([--enable-deprecated-io],
-    [THIS OPTION HAS BEEN DEPRECATED!!!])])
-AS_IF([test ${enable_deprecated_io:-no} = yes],
-  [enable_deprecated_io=yes],
-  [enable_deprecated_io=no])
-
-if test $enable_deprecated_io = yes; then
-  AC_MSG_ERROR(FMS_IO HAS BEEN REMOVED! PLEASE UPDATE TO USE FMS2_IO AND REMOVE --enable-deprecated-io FROM YOUR CONFIGURE OPTIONS OR REVERT TO VERSION 2025.02)
-fi
-
 AC_ARG_ENABLE([r8-default],
   [AS_HELP_STRING([--disable-r8-default],
     [Disables the build from adding the 8 byte default real kind flag during compilation (default no)])])

fms/fms.F90

@@ -320,9 +320,9 @@ subroutine maximize_system_stacksize_limit() bind(C)
     call mpp_domains_init()
     call fms2_io_init()
 #ifdef use_deprecated_io
-      call mpp_error(NOTE, "fms_io_init: fms_io HAS BEEN DEPRECATED! "//&
+      call mpp_error(ERROR, "fms_io_init: fms_io/mpp_io was removed in the 2025.03 release of FMS! "//&
                            "PLEASE REMOVE -Duse_deprecated_io FROM YOUR COMPILE FLAGS "// &
-                           "AND MOVE TO FMS2_IO. CONTACT YOUR MODEL LIASISON IF YOU NEED "// &
+                           "AND MOVE TO FMS2_IO. CONTACT YOUR GFDL MODEL LIAISON IF YOU NEED "// &
                            "ASSISTANCE")
 #endif
     logunitnum = stdlog()