opm-simulators/cmake/Modules/DuneCompat.cmake
Roland Kaufmann e4a345a648 Use OPM_MACROS_ROOT to locate build scripts
By using a separate variable for this we can easily grep for where
the build system depends on its own location, and also change the
policy regarding this later.

Note that there is no opm-macros module; this is a "psuedo"-module
which links to an additional one (currently, the one we're in)
2013-08-16 23:55:43 +02:00

48 lines
2.3 KiB
CMake

# - Dunecontrol compatibility
#
# Enables this build to be a part of a dunecontrol chain. The
# DUNE_CHECK_MODULES macro greps the top-level Makefile for the
# presence of the abs_top_srcdir variable (!) and uses that as
# the include directory of a module. Also, the contents are not
# checked so if the variable is not present, it generates an
# invalid command line (-I without argument) which causes the
# autoconf probe to fail. This module patches our Makefile (!!)
# so the necessary string will be there; in itself this string
# has no use for us, it is solemnly to satisfy the M4 scripts.
if (CMAKE_GENERATOR MATCHES "Unix Makefiles")
# we need an up-to-date, patched Makefile. this is always checked when
# the makefile is run, thus the need for a marker file to keep a
# timestamp to see when it was last patched (by us)
# amazingly, nothing depends on the generated Makefile, so this can be
# run whenever in the build without trigging a compile of e.g. config.h
add_custom_target (dune-compat ALL
COMMAND ${CMAKE_COMMAND} -DCMAKE_HOME_DIRECTORY=${CMAKE_HOME_DIRECTORY} -P ${OPM_MACROS_ROOT}/cmake/Scripts/DuneCompat2.cmake
COMMENT "Patching Makefile to be DUNE compatible"
)
endif (CMAKE_GENERATOR MATCHES "Unix Makefiles")
# dunecontrol refuses to use a build tree as module directory unless
# there is a dune.module in it. however, if we are in a sub-dir. of
# the source, we are probably using dunecontrol with a --build-dir
# argument, and won't call dunecontrol from the parent (which is the
# source dir and most likely doesn't contain other projects) anyway,
# i.e. we only copy if we are truly out-of-source
string (LENGTH "${PROJECT_SOURCE_DIR}/" _src_dir_len)
string (LENGTH "${PROJECT_BINARY_DIR}/" _bin_dir_len)
if (_src_dir_len GREATER _bin_dir_len)
set (_not_substring TRUE)
else (_src_dir_len GREATER _bin_dir_len)
string (SUBSTRING "${PROJECT_BINARY_DIR}/" 0 ${_src_dir_len} _proj_prefix)
if ("${PROJECT_SOURCE_DIR}/" STREQUAL "${_proj_prefix}")
set (_not_substring FALSE)
else ("${PROJECT_SOURCE_DIR}/" STREQUAL "${_proj_prefix}")
set (_not_substring TRUE)
endif ("${PROJECT_SOURCE_DIR}/" STREQUAL "${_proj_prefix}")
endif (_src_dir_len GREATER _bin_dir_len)
if (_not_substring)
execute_process (COMMAND
${CMAKE_COMMAND} -E copy_if_different ${PROJECT_SOURCE_DIR}/dune.module ${PROJECT_BINARY_DIR}/dune.module
)
endif (_not_substring)