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include(ExternalProject)
if(CMAKE_GENERATOR STREQUAL "Borland Makefiles" OR
CMAKE_GENERATOR STREQUAL "Watcom WMake")
set(fs_delay 3)
else()
set(fs_delay 1.125)
endif()
# Given this setup, on the first build, both configure steps and both build
# steps will run. On a noop rebuild, only the build steps will run. Without
# CONFIGURE_HANDLED_BY_BUILD, the configure step of proj2 would also run on a
# noop rebuild.
ExternalProject_Add(proj1
DOWNLOAD_COMMAND ""
SOURCE_DIR ""
CONFIGURE_COMMAND ${CMAKE_COMMAND} -E echo "Doing something"
# file(TIMESTAMP) gives back the timestamp in seconds so we sleep a second to
# make sure we get a different timestamp on the stamp file
BUILD_COMMAND ${CMAKE_COMMAND} -E sleep ${fs_delay}
INSTALL_COMMAND ""
BUILD_ALWAYS ON
STAMP_DIR "stamp"
)
ExternalProject_Add(proj2
DOWNLOAD_COMMAND ""
SOURCE_DIR ""
CONFIGURE_COMMAND ${CMAKE_COMMAND} -E echo "Doing something"
BUILD_COMMAND ${CMAKE_COMMAND} -E sleep ${fs_delay}
INSTALL_COMMAND ""
CONFIGURE_HANDLED_BY_BUILD ON
DEPENDS proj1
STAMP_DIR "stamp"
)
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