Changes found during merge to 1.12 (#414)

* OESS-98 convert plugin option to FetchContent, add tests

* Fixes for pkcfg files because of plugin option

* OESS-98 fix tools test for plugins

* Keep doxygen comments under 100 chars long - format hint

* Whitespace

* HDFFV-11144 - Reclassify CMake messages

* HDFFV-11099/11100 added help text

* Reworked switch statement to compare string instead

* Fix typo

* Update CDash mode

* Correct name of threadsafe

* Correct option name

* Undo accidental commit

* Note LLVM 10 to 11 format default changes

* Update format plugin

* Undo clang-format version 11 changes

* One more correction

* Update supported platforms

* Revert whitespace changes

* Correct whitespace

* Changes from PR#3

* HDFFV-11213 added option to control gcc10 warnings diagnostics

* HDFFV-11212 Use the new references correctly in JNI utility and tests

* format source

* Fix typo

* Add new test file

* HDFFV-11212 - update test and remove unused arg

* Minor non-space formatting changes

* Use H5I_INVALID_ID instead of "-1"

* source formatting

* add missing testfile, update jni function

* Undo commit of debug code

* remove mislocated file

* Fix h5repack test for handling of fapls and id close

* Update h5diff test files usage text

* HDFFV-11212 add new ref tests for JNI export dataset

* src format update

* Remove blank line typo

* src format typo

* long double requires %Lg

* Another long double foramt specifer S.B. %Lg

* issue with t128bit test

* Windows issue with h5dump and type.

* Fix review issues

* refactor function nesting and fix error checks

* format fixes

* Remove untested functions and javadoc quiet comments

* Restore TRY block.

* Change string append errors to memory exception

* revert to H5_JNI_FATAL_ERROR - support functions need work

* Add assertion error for h5util functions

* remove duplicate function

* format fix

* Revert HD function error handling

* Update copyright comments

* GH #386 java folder copyright corrections

* Whitespace

* GH #359 implement and fix tools 1.6 API usage

* remove excessive comments

* Flip inits to correct ifdef section

* rework ifdef to be simpler

* format issue

* Reformat ifdef inits

* remove static attribute

* format compliance

* Update names

* Revert because logic relies on float not being int

* Changes noticed from creating merge of #412

* Double underscore change

* Correct compiler version variable used

* Remove header guard underscores

* Whitespace cleanup

4 files changed, 12 insertions, 12 deletions

diff --git a/c++/src/H5AbstractDs.h b/c++/src/H5AbstractDs.h
index fe6e033c..cb43c73 100644
--- a/c++/src/H5AbstractDs.h
+++ b/c++/src/H5AbstractDs.h
@@ -12,8 +12,8 @@
  * help@hdfgroup.org.                                                        *
  * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * */
 
-#ifndef __AbstractDs_H
-#define __AbstractDs_H
+#ifndef AbstractDs_H
+#define AbstractDs_H
 
 namespace H5 {
 
@@ -81,4 +81,4 @@ class H5_DLLCPP AbstractDs {
 }; // end of AbstractDs
 } // namespace H5
 
-#endif // __AbstractDs_H
+#endif // AbstractDs_H
diff --git a/c++/src/H5CommonFG.h b/c++/src/H5CommonFG.h
index 2e5ccf3..368883b 100644
--- a/c++/src/H5CommonFG.h
+++ b/c++/src/H5CommonFG.h
@@ -12,8 +12,8 @@
  * help@hdfgroup.org.                                                        *
  * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * */
 
-#ifndef __CommonFG_H
-#define __CommonFG_H
+#ifndef CommonFG_H
+#define CommonFG_H
 
 namespace H5 {
 
@@ -83,7 +83,7 @@ class H5_DLLCPP CommonFG {
 }; // end of CommonFG
 } // namespace H5
 
-#endif // __CommonFG_H
+#endif // CommonFG_H
 
 /***************************************************************************
                                 Design Note
diff --git a/c++/src/H5Group.h b/c++/src/H5Group.h
index ae5bb4a..2a0f18e 100644
--- a/c++/src/H5Group.h
+++ b/c++/src/H5Group.h
@@ -12,8 +12,8 @@
  * help@hdfgroup.org.                                                        *
  * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * */
 
-#ifndef __Group_H
-#define __Group_H
+#ifndef Group_H
+#define Group_H
 
 namespace H5 {
 
@@ -83,4 +83,4 @@ class H5_DLLCPP Group : public H5Object, public CommonFG {
 }; // end of Group
 } // namespace H5
 
-#endif // __Group_H
+#endif // Group_H
diff --git a/c++/src/H5IdComponent.h b/c++/src/H5IdComponent.h
index b756a3d..4f75849 100644
--- a/c++/src/H5IdComponent.h
+++ b/c++/src/H5IdComponent.h
@@ -12,8 +12,8 @@
  * help@hdfgroup.org.                                                        *
  * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * */
 
-#ifndef __IdComponent_H
-#define __IdComponent_H
+#ifndef IdComponent_H
+#define IdComponent_H
 
 namespace H5 {
 
@@ -113,4 +113,4 @@ class H5_DLLCPP IdComponent {
 }; // end class IdComponent
 } // namespace H5
 
-#endif // __IdComponent_H
+#endif // IdComponent_H