2013-02-01 13:10:20 +01:00
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# - Emulate a rule to patch the Makefile, adding a line to the source
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# tree and write a marker file indicating it is done.
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set (base_dir ".")
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set (marker_file "${base_dir}/CMakeFiles/marker")
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set (makefile "${base_dir}/Makefile")
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2013-02-01 23:06:32 +01:00
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# if the Makefile has changed, then update it
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2013-02-01 13:10:20 +01:00
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if ("${makefile}" IS_NEWER_THAN "${marker_file}")
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2013-02-01 23:06:32 +01:00
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# only add the string once, so it does not return multiple
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# results for the command line (will lead to syntax error)
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file (STRINGS "${makefile}" abs_top_srcdir_FOUND
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REGEX "^abs_top_srcdir = "
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2013-02-01 13:10:20 +01:00
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)
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2013-02-01 23:06:32 +01:00
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if (NOT abs_top_srcdir_FOUND)
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file (APPEND "${makefile}"
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"abs_top_srcdir = ${CMAKE_HOME_DIRECTORY}\n"
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)
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endif (NOT abs_top_srcdir_FOUND)
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# touch the marker so that we won't update the Makefile again
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2013-02-01 13:10:20 +01:00
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execute_process (COMMAND
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${CMAKE_COMMAND} -E touch "${marker_file}"
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)
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endif ("${makefile}" IS_NEWER_THAN "${marker_file}")
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