CMake/Modules/Platform/BlueGeneP-base.cmake
Brad King 86578eccf2 Simplify CMake per-source license notices
Per-source copyright/license notice headers that spell out copyright holder
names and years are hard to maintain and often out-of-date or plain wrong.
Precise contributor information is already maintained automatically by the
version control tool.  Ultimately it is the receiver of a file who is
responsible for determining its licensing status, and per-source notices are
merely a convenience.  Therefore it is simpler and more accurate for
each source to have a generic notice of the license name and references to
more detailed information on copyright holders and full license terms.

Our `Copyright.txt` file now contains a list of Contributors whose names
appeared source-level copyright notices.  It also references version control
history for more precise information.  Therefore we no longer need to spell
out the list of Contributors in each source file notice.

Replace CMake per-source copyright/license notice headers with a short
description of the license and links to `Copyright.txt` and online information
available from "https://cmake.org/licensing".  The online URL also handles
cases of modules being copied out of our source into other projects, so we
can drop our notices about replacing links with full license text.

Run the `Utilities/Scripts/filter-notices.bash` script to perform the majority
of the replacements mechanically.  Manually fix up shebang lines and trailing
newlines in a few files.  Manually update the notices in a few files that the
script does not handle.
2016-09-27 15:14:44 -04:00

115 lines
5.1 KiB
CMake

# Distributed under the OSI-approved BSD 3-Clause License. See accompanying
# file Copyright.txt or https://cmake.org/licensing for details.
#
# BlueGeneP base platform file.
#
# NOTE: Do not set your platform to "BlueGeneP-base". This file is included
# by the real platform files. Use one of these two platforms instead:
#
# BlueGeneP-dynamic For dynamically linked builds
# BlueGeneP-static For statically linked builds
#
# This platform file tries its best to adhere to the behavior of the MPI
# compiler wrappers included with the latest BG/P drivers.
#
#
# For BGP builds, we're cross compiling, but we don't want to re-root things
# (e.g. with CMAKE_FIND_ROOT_PATH) because users may have libraries anywhere on
# the shared filesystems, and this may lie outside the root. Instead, we set the
# system directories so that the various system BGP CNK library locations are
# searched first. This is not the clearest thing in the world, given IBM's driver
# layout, but this should cover all the standard ones.
#
set(CMAKE_SYSTEM_LIBRARY_PATH
/bgsys/drivers/ppcfloor/comm/default/lib # default comm layer (used by mpi compiler wrappers)
/bgsys/drivers/ppcfloor/comm/sys/lib # DCMF, other lower-level comm libraries
/bgsys/drivers/ppcfloor/runtime/SPI # other low-level stuff
/bgsys/drivers/ppcfloor/gnu-linux/lib # CNK python installation directory
/bgsys/drivers/ppcfloor/gnu-linux/powerpc-bgp-linux/lib # CNK Linux image -- standard runtime libs, pthread, etc.
)
#
# This adds directories that find commands should specifically ignore for cross compiles.
# Most of these directories are the includeand lib directories for the frontend on BG/P systems.
# Not ignoring these can cause things like FindX11 to find a frontend PPC version mistakenly.
# We use this on BG instead of re-rooting because backend libraries are typically strewn about
# the filesystem, and we can't re-root ALL backend libraries to a single place.
#
set(CMAKE_SYSTEM_IGNORE_PATH
/lib /lib64 /include
/usr/lib /usr/lib64 /usr/include
/usr/local/lib /usr/local/lib64 /usr/local/include
/usr/X11/lib /usr/X11/lib64 /usr/X11/include
/usr/lib/X11 /usr/lib64/X11 /usr/include/X11
/usr/X11R6/lib /usr/X11R6/lib64 /usr/X11R6/include
/usr/X11R7/lib /usr/X11R7/lib64 /usr/X11R7/include
)
#
# Indicate that this is a unix-like system
#
set(UNIX 1)
#
# Library prefixes, suffixes, extra libs.
#
set(CMAKE_LINK_LIBRARY_SUFFIX "")
set(CMAKE_STATIC_LIBRARY_PREFIX "lib") # lib
set(CMAKE_STATIC_LIBRARY_SUFFIX ".a") # .a
set(CMAKE_SHARED_LIBRARY_PREFIX "lib") # lib
set(CMAKE_SHARED_LIBRARY_SUFFIX ".so") # .so
set(CMAKE_EXECUTABLE_SUFFIX "") # .exe
set(CMAKE_DL_LIBS "dl")
#
# This macro needs to be called for dynamic library support. Unfortunately on BGP,
# We can't support both static and dynamic links in the same platform file. The
# dynamic link platform file needs to call this explicitly to set up dynamic linking.
#
macro(__BlueGeneP_set_dynamic_flags compiler_id lang)
if (${compiler_id} STREQUAL XL)
# Flags for XL compilers if we explicitly detected XL
set(CMAKE_${lang}_COMPILE_OPTIONS_PIC "-qpic")
set(CMAKE_${lang}_COMPILE_OPTIONS_PIE "-qpie")
set(CMAKE_SHARED_LIBRARY_${lang}_FLAGS "-qpic")
set(CMAKE_SHARED_LIBRARY_CREATE_${lang}_FLAGS "-qmkshrobj -qnostaticlink")
set(BGP_${lang}_DYNAMIC_EXE_FLAGS "-qnostaticlink -qnostaticlink=libgcc")
else()
# Assume flags for GNU compilers (if the ID is GNU *or* anything else).
set(CMAKE_${lang}_COMPILE_OPTIONS_PIC "-fPIC")
set(CMAKE_${lang}_COMPILE_OPTIONS_PIE "-fPIE")
set(CMAKE_SHARED_LIBRARY_${lang}_FLAGS "-fPIC")
set(CMAKE_SHARED_LIBRARY_CREATE_${lang}_FLAGS "-shared")
set(BGP_${lang}_DYNAMIC_EXE_FLAGS "-dynamic")
endif()
# Both toolchains use the GNU linker on BG/P, so these options are shared.
set(CMAKE_SHARED_LIBRARY_RUNTIME_${lang}_FLAG "-Wl,-rpath,")
set(CMAKE_SHARED_LIBRARY_RPATH_LINK_${lang}_FLAG "-Wl,-rpath-link,")
set(CMAKE_SHARED_LIBRARY_SONAME_${lang}_FLAG "-Wl,-soname,")
set(CMAKE_EXE_EXPORTS_${lang}_FLAG "-Wl,--export-dynamic")
set(CMAKE_SHARED_LIBRARY_LINK_${lang}_FLAGS "") # +s, flag for exe link to use shared lib
set(CMAKE_SHARED_LIBRARY_RUNTIME_${lang}_FLAG_SEP ":") # : or empty
set(BGP_${lang}_DEFAULT_EXE_FLAGS
"<FLAGS> <CMAKE_${lang}_LINK_FLAGS> <LINK_FLAGS> <OBJECTS> -o <TARGET> <LINK_LIBRARIES>")
set(CMAKE_${lang}_LINK_EXECUTABLE
"<CMAKE_${lang}_COMPILER> -Wl,-relax ${BGP_${lang}_DYNAMIC_EXE_FLAGS} ${BGP_${lang}_DEFAULT_EXE_FLAGS}")
endmacro()
#
# This macro needs to be called for static builds. Right now it just adds -Wl,-relax
# to the link line.
#
macro(__BlueGeneP_set_static_flags compiler_id lang)
set(BGP_${lang}_DEFAULT_EXE_FLAGS
"<FLAGS> <CMAKE_${lang}_LINK_FLAGS> <LINK_FLAGS> <OBJECTS> -o <TARGET> <LINK_LIBRARIES>")
set(CMAKE_${lang}_LINK_EXECUTABLE
"<CMAKE_${lang}_COMPILER> -Wl,-relax ${BGP_${lang}_DEFAULT_EXE_FLAGS}")
endmacro()