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explain error message when using a non-c++11 compliant compiler.

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Axel Kohlmeyer
2020-04-12 16:32:40 -04:00
parent 3201213bec
commit ebf6e23a67
2 changed files with 30 additions and 10 deletions
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36
doc/src/Build_basics.rst
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@ -270,17 +270,35 @@ Serial build with GNU gcc (see ``src/MAKE/Makefile.serial``):
LINK = g++ LINK = g++
LINKFLAGS = -g -O LINKFLAGS = -g -O
.. note:: .. note::
If you build LAMMPS with any :doc:`accelerator packages <Speed_packages>` If compilation stops with a message like the following:
included, there may be specific optimization flags that are either
required or recommended to enable required features and to achieve .. code-block::
optimal performance. You need to include these in the CCFLAGS and
LINKFLAGS settings above. For details, see the individual package g++ -g -O3 -DLAMMPS_GZIP -DLAMMPS_MEMALIGN=64 -I../STUBS -c ../main.cpp
doc pages listed on the :doc:`Speed packages <Speed_packages>` doc In file included from ../pointers.h:24:0,
page. Or examine these files in the src/MAKE/OPTIONS directory. from ../input.h:17,
They correspond to each of the 5 accelerator packages and their from ../main.cpp:16:
hardware variants: ../lmptype.h:34:2: error: #error LAMMPS requires a C++11 (or later) compliant compiler. Enable C++11 compatibility or upgrade the compiler.
then you have either an unsupported (old) compiler or you have to
turn on C++11 mode. The latter applies to GCC 4.8.x shipped with
RHEL 7.x and CentOS 7.x. For those compilers, you need to add the
``-std=c++11`` flag. Otherwise, you would have to install a newer
compiler that supports C++11; either as a binary package or through
compiling from source.
If you build LAMMPS with any :doc:`accelerator packages
<Speed_packages>` included, there may be specific optimization flags
that are either required or recommended to enable required features and
to achieve optimal performance. You need to include these in the
CCFLAGS and LINKFLAGS settings above. For details, see the individual
package doc pages listed on the :doc:`Speed packages <Speed_packages>`
doc page. Or examine these files in the src/MAKE/OPTIONS directory.
They correspond to each of the 5 accelerator packages and their hardware
variants:
.. code-block:: bash .. code-block:: bash

4
doc/src/Build_make.rst
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@ -20,7 +20,9 @@ with :doc:`CMake <Build_cmake>`. The makefiles of the traditional
make based build process and the scripts they are calling expect a few make based build process and the scripts they are calling expect a few
additional tools to be available and functioning. additional tools to be available and functioning.
* a working C/C++ compiler toolchain; on Linux these are often the GNU compilers * a working C/C++ compiler toolchain supporting the C++11 standard; on
Linux these are often the GNU compilers. Some older compilers
require adding flags like ``-std=c++11`` to enable the C++11 mode.
* a Bourne shell compatible "Unix" shell program (often this is ``bash``) * a Bourne shell compatible "Unix" shell program (often this is ``bash``)
* a few shell utilities: ``ls``, ``mv``, ``ln``, ``rm``, ``grep``, ``sed``, ``tr``, ``cat``, ``touch``, ``diff``, ``dirname`` * a few shell utilities: ``ls``, ``mv``, ``ln``, ``rm``, ``grep``, ``sed``, ``tr``, ``cat``, ``touch``, ``diff``, ``dirname``
* python (optional, required for ``make lib-<pkg>`` in the src folder). * python (optional, required for ``make lib-<pkg>`` in the src folder).