C++ warning and build fixes (#707)

* Committing clang-format changes

* C++ build and warning updates

* Fixes all warnings on C++ (with gcc 9.3)
* Updates CMake and Autotools C++ builds

* Undo warning clobber

Co-authored-by: github-actions <41898282+github-actions[bot]@users.noreply.github.com>

1 files changed, 0 insertions, 79 deletions

diff --git a/m4/aclocal_cxx.m4 b/m4/aclocal_cxx.m4
deleted file mode 100644
index 2779066..0000000
--- a/m4/aclocal_cxx.m4
+++ /dev/null
@@ -1,79 +0,0 @@
-dnl -------------------------------------------------------------------------
-dnl -------------------------------------------------------------------------
-dnl
-dnl Copyright by the Board of Trustees of the University of Illinois.
-dnl All rights reserved.
-dnl
-dnl This file is part of HDF5.  The full HDF5 copyright notice, including
-dnl terms governing use, modification, and redistribution, is contained in
-dnl the COPYING file, which can be found at the root of the source code
-dnl distribution tree, or in https://www.hdfgroup.org/licenses.
-dnl If you do not have access to either file, you may request a copy from
-dnl help@hdfgroup.org
-dnl
-dnl -------------------------------------------------------------------------
-dnl -------------------------------------------------------------------------
-
-dnl *********************************
-dnl PURPOSE
-dnl  Contains Macros for HDF5 C++
-dnl *********************************
-dnl
-dnl Special characteristics that have no autoconf counterpart but that
-dnl we need as part of the C++ support.  To distinquish these, they
-dnl have a [PAC] prefix.
-
-dnl Checking if C++ needs old style header files in includes
-AC_DEFUN([PAC_PROG_CXX_HEADERS],[
-  AC_MSG_CHECKING([if $CXX needs old style header files in includes])
-  TEST_SRC="`(echo \"#define OLD_HEADER_FILENAME 1\"; cat $srcdir/config/cmake_ext_mod/HDFCXXTests.cpp)`"
-
-  AC_LINK_IFELSE([AC_LANG_SOURCE([$TEST_SRC])],
-    [AC_MSG_RESULT([no])],
-    [AC_MSG_RESULT([yes])
-    CXXFLAGS="${CXXFLAGS} -DOLD_HEADER_FILENAME"
-    AM_CXXFLAGS="${AM_CXXFLAGS} -DOLD_HEADER_FILENAME"])
-])
-
-dnl Checking if ++ can handle namespaces
-AC_DEFUN([PAC_PROG_CXX_NAMESPACE],[
-  AC_MSG_CHECKING([if $CXX can handle namespaces])
-  TEST_SRC="`(echo \"#define HDF_NO_NAMESPACE 1\"; cat $srcdir/config/cmake_ext_mod/HDFCXXTests.cpp)`"
-
-  AC_LINK_IFELSE([AC_LANG_SOURCE([$TEST_SRC])], [AC_MSG_RESULT([yes])],
-     [AC_MSG_RESULT([no])
-     CXXFLAGS="${CXXFLAGS} -DHDF_NO_NAMESPACE"
-     AM_CXXFLAGS="${AM_CXXFLAGS} -DHDF_NO_NAMESPACE"])
-])
-
-dnl Checking if C++ supports std
-AC_DEFUN([PAC_PROG_CXX_STD],[
-  AC_MSG_CHECKING([if $CXX supports std])
-  TEST_SRC="`(echo \"#define HDF_NO_STD 1\"; cat $srcdir/config/cmake_ext_mod/HDFCXXTests.cpp)`"
-
-  AC_LINK_IFELSE([AC_LANG_SOURCE([$TEST_SRC])], [AC_MSG_RESULT([yes])],
-     [AC_MSG_RESULT([no])
-     CXXFLAGS="${CXXFLAGS} -DH5_NO_STD"
-     AM_CXXFLAGS="${AM_CXXFLAGS} -DH5_NO_STD"])
-])
-
-dnl Checking if C++ has offsetof extension
-AC_DEFUN([PAC_PROG_CXX_OFFSETOF],[
-  AC_MSG_CHECKING([if $CXX has offsetof extension])
-  TEST_SRC="`(echo \"#define CXX_HAVE_OFFSETOF 1\"; cat $srcdir/config/cmake_ext_mod/HDFCXXTests.cpp)`"
-
-  AC_LINK_IFELSE([AC_LANG_SOURCE([$TEST_SRC])],[AC_MSG_RESULT([yes])
-    AC_DEFINE([CXX_HAVE_OFFSETOF], [1], [Define if C++ compiler recognizes offsetof])],
-    AC_MSG_RESULT([no]))
-])
-
-dnl Checking if C++ can handle static cast
-AC_DEFUN([PAC_PROG_CXX_STATIC_CAST],[
-  AC_MSG_CHECKING([if $CXX can handle static cast])
-  TEST_SRC="`(echo \"#define NO_STATIC_CAST 1\"; cat $srcdir/config/cmake_ext_mod/HDFCXXTests.cpp)`"
-
-  AC_LINK_IFELSE([AC_LANG_SOURCE([$TEST_SRC])], [AC_MSG_RESULT([yes])],
-    [AC_MSG_RESULT([no])
-    CXXFLAGS="${CXXFLAGS} -DNO_STATIC_CAST"
-    AM_CXXFLAGS="${AM_CXXFLAGS} -DNO_STATIC_CAST"])
-])