[svn-r19808] Purpose:

    Add "--enable-unsupported" configure flag.

Description

    The "--enable-unsupported" configure flag allows a user to
    prevent configure from failing due to the use of incompatible
    options, such as c++ with parallel.

    Specifying --enable-unsupported will bypass all of configure's
    checks for incompatible and unsupported combinations of flags. 
    There are no guarantees that the library will be configured
    in any sort of working condition, but that's the risk of
    using the --enable-unsupported flag.

    I've changed all default error messages related to unsupported
    option combinations to indicate that using --enable-unsupported
    will allow configure to complete without error.

Tested:

    by hand on jam, tested all unsupported configure option 
    combinations with and without the new flag, making sure
    the flag allows configure to finish without error. 
    (h5committest wouldn't do any good here; it won't test
    the new option, and since we're enabling unsupported
    combinations, failures are likely to occur in build or
    tests with --enable-unsupported turned on anyways. 
    That's why they're unsupported!)

1 files changed, 55 insertions, 22 deletions

diff --git a/configure b/configure
index 01ba7ab..3cd5b8b 100755
--- a/configure
+++ b/configure
@@ -1,5 +1,5 @@
 #! /bin/sh
-# From configure.in Id: configure.in 19740 2010-11-07 14:31:35Z hdftest .
+# From configure.in Id: configure.in 19781 2010-11-15 05:04:28Z vchoi .
 # Guess values for system-dependent variables and create Makefiles.
 # Generated by GNU Autoconf 2.67 for HDF5 1.9.80.
 #
@@ -839,6 +839,7 @@ ac_user_opts='
 enable_option_checking
 enable_maintainer_mode
 enable_dependency_tracking
+enable_unsupported
 enable_fortran
 enable_cxx
 enable_shared
@@ -1519,6 +1520,7 @@ Optional Features:
 			  (and sometimes confusing) to the casual installer
   --disable-dependency-tracking  speeds up one-time build
   --enable-dependency-tracking   do not reject slow dependency extractors
+  --enable-unsupported    Allow unsupported combinations of configure options
   --enable-fortran        Compile the Fortran interface [default=no]
   --enable-cxx            Compile the C++ interface [default=no]
   --enable-shared[=PKGS]  build shared libraries [default=yes]
@@ -4922,6 +4924,27 @@ fi
 
 CC_BASENAME="`echo $CC | cut -f1 -d' ' | xargs basename 2>/dev/null`"
 
+{ $as_echo "$as_me:${as_lineno-$LINENO}: checking if unsupported combinations of configure options are allowed" >&5
+$as_echo_n "checking if unsupported combinations of configure options are allowed... " >&6; }
+# Check whether --enable-unsupported was given.
+if test "${enable_unsupported+set}" = set; then :
+  enableval=$enable_unsupported; ALLOW_UNSUPPORTED=$enableval
+fi
+
+
+case "X-$ALLOW_UNSUPPORTED" in
+  X-|X-no)
+    { $as_echo "$as_me:${as_lineno-$LINENO}: result: no" >&5
+$as_echo "no" >&6; }
+    ;;
+  X-yes)
+    { $as_echo "$as_me:${as_lineno-$LINENO}: result: yes" >&5
+$as_echo "yes" >&6; }
+    ;;
+  *)
+    ;;
+esac
+
  HDF5_INTERFACES=""
 { $as_echo "$as_me:${as_lineno-$LINENO}: checking if Fortran interface enabled" >&5
 $as_echo_n "checking if Fortran interface enabled... " >&6; }
@@ -7449,15 +7472,18 @@ if (${CC-cc} -V 2>&1 | grep '^pgcc 6.0') > /dev/null && test "X$enable_productio
     CC="${CC-cc} -Mx,28,0x8"
 fi
 
-case "`uname`" in
-  CYGWIN*)
-    if test "X${enable_shared}" = "Xyes"; then
-      echo '    warning: shared libraries are not supported on Cygwin!'
-      echo '    disabling shared libraries'
-    fi
-    enable_shared="no"
-    ;;
-esac
+if test "X${ALLOW_UNSUPPORTED}" != "Xyes"; then
+  case "`uname`" in
+    CYGWIN*)
+      if test "X${enable_shared}" = "Xyes"; then
+        echo '    warning: shared libraries are not supported on Cygwin!'
+        echo '    disabling shared libraries'
+        echo '    use --enable-unsupported to override this warning and keep shared libraries enabled'
+      fi
+      enable_shared="no"
+      ;;
+  esac
+fi
 
 enable_dlopen=yes
 
@@ -25538,19 +25564,25 @@ if test "${enable_parallel+set}" = set; then :
 fi
 
 
-if test "X${HDF_CXX}" = "Xyes" -a "X${enable_parallel}" = "Xyes"; then
-  as_fn_error $? "--enable-cxx and --enable-parallel flags are incompatible" "$LINENO" 5
+if test "X${ALLOW_UNSUPPORTED}" != "Xyes"; then
+  if test "X${HDF_CXX}" = "Xyes" -a "X${enable_parallel}" = "Xyes"; then
+    as_fn_error $? "--enable-cxx and --enable-parallel flags are incompatible. Use --enable-unsupported to override this error." "$LINENO" 5
+  fi
 fi
 
-if test "X${THREADSAFE}" = "Xyes" -a "X${enable_parallel}" = "Xyes"; then
-  as_fn_error $? "--enable-threadsafe and --enable-parallel flags are incompatible" "$LINENO" 5
+if test "X${ALLOW_UNSUPPORTED}" != "Xyes"; then
+  if test "X${THREADSAFE}" = "Xyes" -a "X${enable_parallel}" = "Xyes"; then
+    as_fn_error $? "--enable-threadsafe and --enable-parallel flags are incompatible. Use --enable-unsupported to override this error." "$LINENO" 5
+  fi
 fi
 
-if test "X${PARALLEL}" != "X" -a "X${enable_cxx}" = "Xyes" ; then
-  as_fn_error $? "An MPI compiler is being used; --enable-cxx is not allowed" "$LINENO" 5
-fi
-if test "X${PARALLEL}" != "X" -a "X${THREADSAFE}" = "Xyes"; then
-  as_fn_error $? "An MPI compiler is being used; --enable-threadsafe is not allowed" "$LINENO" 5
+if test "X${ALLOW_UNSUPPORTED}" != "Xyes"; then
+  if test "X${PARALLEL}" != "X" -a "X${enable_cxx}" = "Xyes" ; then
+    as_fn_error $? "An MPI compiler is being used; --enable-cxx is not allowed. Use --enable-unsupported to override this error." "$LINENO" 5
+  fi
+  if test "X${PARALLEL}" != "X" -a "X${THREADSAFE}" = "Xyes"; then
+    as_fn_error $? "An MPI compiler is being used; --enable-threadsafe is not allowed. Use --enable-unsupported to override this error." "$LINENO" 5
+  fi
 fi
 
 { $as_echo "$as_me:${as_lineno-$LINENO}: checking for parallel support files" >&5
@@ -28201,12 +28233,13 @@ else
     as_fn_error $? "invalid version of public symbols given" "$LINENO" 5
 fi
 
-if test "X${DEFAULT_API_VERSION}" != "Xv110" -a "X${DEPRECATED_SYMBOLS}" = "Xno" ; then
-  as_fn_error $? "Removing old public API symbols not allowed when using them as default public API symbols" "$LINENO" 5
+if test "X${ALLOW_UNSUPPORTED}" != "Xyes"; then
+  if test "X${DEFAULT_API_VERSION}" != "Xv110" -a "X${DEPRECATED_SYMBOLS}" = "Xno" ; then
+    as_fn_error $? "Removing old public API symbols not allowed when using them as default public API symbols. Use --enable-unsupported to override this error." "$LINENO" 5
+  fi
 fi
 
 
-
 { $as_echo "$as_me:${as_lineno-$LINENO}: checking Whether to perform strict file format checks" >&5
 $as_echo_n "checking Whether to perform strict file format checks... " >&6; };
 # Check whether --enable-strict-format-checks was given.