separation of libhdf5 from libsrc4

configure.ac

@@ -203,8 +203,14 @@ fi
 AC_MSG_RESULT([$enable_netcdf_4])
 
 # Does the user want to use HDF5?
-enable_hdf5=$enable_netcdf_4
 AC_MSG_CHECKING([whether we should build with HDF5])
+enable_hdf5=$enable_netcdf_4
+dnl AC_ARG_ENABLE([hdf5], [AS_HELP_STRING([--disable-hdf5],
+dnl               [do not build with HDF5])])
+dnl test "x$enable_hdf5" = xno || enable_hdf5=yes
+dnl if test "x$enable_netcdf_4" = xno ; then
+dnl enable_hdf5=no
+dnl fi
 AC_MSG_RESULT([$enable_hdf5])
 
 # Does the user require dynamic loading?
@@ -1007,9 +1013,13 @@ AC_CHECK_LIB([m], [floor], [],
 [AC_MSG_ERROR([Can't find or link to the math library.])])
 
 if test "x$enable_netcdf_4" = xyes; then
+   AC_DEFINE([USE_NETCDF4], [1], [if true, build netCDF-4])
+fi
+
+hdf5_parallel=no
+if test "x$enable_hdf5" = xyes; then
 
    AC_DEFINE([USE_HDF5], [1], [if true, use HDF5])
-   AC_DEFINE([USE_NETCDF4], [1], [if true, build netCDF-4])
    AC_DEFINE([H5_USE_16_API], [1], [use HDF5 1.6 API])
 
    # Check for the main hdf5 and hdf5_hl library.
@@ -1021,20 +1031,10 @@ if test "x$enable_netcdf_4" = xyes; then
 
    AC_CHECK_HEADERS([hdf5.h], [], [AC_MSG_ERROR([Compiling a test with HDF5 failed.  Either hdf5.h cannot be found, or config.log should be checked for other reason.])])
    AC_CHECK_FUNCS([H5Z_SZIP])
-   hdf5_parallel=no
 
    # H5Pset_fapl_mpiposix and H5Pget_fapl_mpiposix have been removed since HDF5 1.8.12.
    # Use H5Pset_fapl_mpio and H5Pget_fapl_mpio, instead.
    AC_CHECK_FUNCS([H5Pget_fapl_mpio H5Pset_deflate H5Z_SZIP H5free_memory H5Pset_libver_bounds H5Pset_all_coll_metadata_ops])
-   # The user may have parallel HDF5 based on MPI POSIX.
-   # if test "x$ac_cv_func_H5Pget_fapl_mpiposix" = xyes; then
-   #    AC_DEFINE([USE_PARALLEL_POSIX], [1], [if true, compile in parallel netCDF-4 based on MPI/POSIX])
-   # fi
-
-   # The user may have parallel HDF5 based on MPI mumble mumble.
-   # if test "x$ac_cv_func_H5Pget_fapl_mpio" = xyes; then
-   #    AC_DEFINE([USE_PARALLEL_MPIO], [1], [if true, compile in parallel netCDF-4 based on MPI/IO])
-   # fi
 
    # Check to see if HDF5 library has collective metadata APIs, (HDF5 >= 1.10.0)
    if test "x$ac_cv_func_H5Pset_all_coll_metadata_ops" = xyes; then
@@ -1042,7 +1042,6 @@ if test "x$enable_netcdf_4" = xyes; then
    fi
 
    # If parallel is available in hdf5, enable it in the C code. Also add some stuff to netcdf.h.
-   hdf5_parallel=no
    if test "x$ac_cv_func_H5Pget_fapl_mpio" = xyes -o "x$ac_cv_func_H5Pget_fapl_mpiposix" = xyes; then
       hdf5_parallel=yes
    fi
@@ -1073,21 +1072,22 @@ if test "x$enable_netcdf_4" = xyes; then
       AC_DEFINE([HDF5_HAS_LIBVER_BOUNDS], [1], [if true, netcdf4 file properties will be set using H5Pset_libver_bounds])
    fi
 
-   # If the user wants hdf4 built in, check it out.
+fi
-   if test "x$enable_hdf4" = xyes; then
-      AC_CHECK_LIB([jpeg], [jpeg_CreateCompress], [],
-                   [AC_MSG_ERROR([Jpeg library required for --enable-hdf4 builds.])])
-      AC_CHECK_HEADERS([mfhdf.h], [], [nc_mfhdf_h_missing=yes])
-      if test "x$nc_mfhdf_h_missing" = xyes; then
-         AC_MSG_ERROR([Cannot find mfhdf.h, yet --enable-hdf4 was used.])
-      fi
-      AC_CHECK_LIB([df], [Hclose], [], [AC_MSG_ERROR([Can't find or link to the hdf4 df library. See config.log for errors.])])
-      AC_CHECK_LIB([mfhdf], [NC_arrayfill], [AC_MSG_ERROR([HDF4 library must be built with --disable-netcdf.])], [])
-      AC_CHECK_LIB([mfhdf], [SDcreate], [], [AC_MSG_ERROR([Can't find or link to the hdf4 mfhdf library. See config.log for errors.])])
 
-     AC_CHECK_LIB([jpeg], [jpeg_set_quality], [], [AC_MSG_ERROR([Can't find or link to the jpeg library (required by hdf4). See config.log for errors.])])
+# If the user wants hdf4 built in, check it out.
-      AC_DEFINE([USE_HDF4], [1], [if true, use HDF4 too])
+if test "x$enable_hdf4" = xyes; then
+   AC_CHECK_LIB([jpeg], [jpeg_CreateCompress], [],
+                [AC_MSG_ERROR([Jpeg library required for --enable-hdf4 builds.])])
+   AC_CHECK_HEADERS([mfhdf.h], [], [nc_mfhdf_h_missing=yes])
+   if test "x$nc_mfhdf_h_missing" = xyes; then
+      AC_MSG_ERROR([Cannot find mfhdf.h, yet --enable-hdf4 was used.])
    fi
+   AC_CHECK_LIB([df], [Hclose], [], [AC_MSG_ERROR([Can't find or link to the hdf4 df library. See config.log for errors.])])
+   AC_CHECK_LIB([mfhdf], [NC_arrayfill], [AC_MSG_ERROR([HDF4 library must be built with --disable-netcdf.])], [])
+   AC_CHECK_LIB([mfhdf], [SDcreate], [], [AC_MSG_ERROR([Can't find or link to the hdf4 mfhdf library. See config.log for errors.])])
+
+   AC_CHECK_LIB([jpeg], [jpeg_set_quality], [], [AC_MSG_ERROR([Can't find or link to the jpeg library (required by hdf4). See config.log for errors.])])
+   AC_DEFINE([USE_HDF4], [1], [if true, use HDF4 too])
 fi
 
 # There are several cases for parallelism:
@@ -1097,7 +1097,7 @@ fi
 #    b. do want to use it for netcdf4
 
 # Should we provide parallel io for netcdf-4?
-if test "x$enable_netcdf_4" = xyes ; then
+if test "x$enable_hdf5" = xyes ; then
    AC_ARG_ENABLE([parallel4],
 	[AS_HELP_STRING([--disable-parallel4],
                         [disable parallel I/O for netcdf-4, even if it's enabled in libhdf5])],

libsrc4/error4.c

@@ -17,7 +17,9 @@ redistribution conditions. */
 #include <stdlib.h>
 #include <stdio.h>
 #include "assert.h"
+#ifdef USE_HDF5
 #include <hdf5.h>
+#endif /* USE_HDF5 */
 
 /* This contents of this file get skipped if LOGGING is not defined
  * during compile. */
@@ -64,10 +66,12 @@ nc_log(int severity, const char *fmt, ...)
    fflush(stderr);
 }
 
-void 
+void
 nc_log_hdf5(void)
 {
+#ifdef USE_HDF5
     H5Eprint(NULL);
+#endif /* USE_HDF5 */
 }
 
 #endif /* ifdef LOGGING */

libsrc4/nc4internal.c

@@ -1412,10 +1412,7 @@ int
 nc_set_log_level(int new_level)
 {
 #ifdef LOGGING
-   if(!nc4_hdf5_initialized)
+   /* Remember the new level. */
-      nc4_hdf5_initialize();
-
-   /* Now remember the new level. */
    nc_log_level = new_level;
    LOG((4, "log_level changed to %d", nc_log_level));
 #endif /*LOGGING */