Add -showconfig to h5cc scripts to dump libhdf5.settings file (#1391)

* Add -showconfig to h5cc scripts to dump libhdf5.settings file

* Added note

config/cmake/libh5cc.in

@@ -27,6 +27,27 @@ prg=$dir/$(basename -- "$prg") || exit
 printf '%s\n' "$prg"
 printf 'dir is %s\n' "$dir"
 
+
+# Show the configuration summary of the library recorded in the
+# libhdf5.settings file reside in the lib directory.
+showconfigure()
+{
+  cat $dir/lib/libhdf5.settings
+  status=$?
+}
+
 export PKG_CONFIG_PATH=$dir/lib/pkgconfig
 
-@_PKG_CONFIG_COMPILER@ $@ `pkg-config --define-variable=prefix=$dir --cflags --libs @_PKG_CONFIG_LIBNAME@`
+for arg in $@ ; do
+  case "$arg" in
+    -showconfig)
+      showconfigure
+      exit $status
+      ;;
+    *)
+      @_PKG_CONFIG_COMPILER@ $@ `pkg-config --define-variable=prefix=$dir --cflags --libs @_PKG_CONFIG_LIBNAME@`
+      status=$?
+      exit $status
+      ;;
+  esac
+done

release_docs/RELEASE.txt

@@ -47,6 +47,13 @@ New Features
 
     Configuration:
     -------------
+    - Added new option to the h5cc scripts produced by CMake.
+
+      Add -showconfig option to h5cc scripts that cat the 
+      libhdf5-settings to the standard output.
+
+      (ADB - 2022/01/25)
+
     - CMake will now run the PowerShell script tests in test/ by default
       on Windows.