Re: Re: Occasional error when building with Cmake because of lyx_date.h

[Kornel Benko]

Am Mittwoch, 9. Januar 2013 um 15:38:16, schrieb Stephan Witt <st.w...@gmx.net>
> Am 09.01.2013 um 15:24 schrieb Kornel Benko <kor...@lyx.org>:
> 
> > Am Mittwoch, 9. Januar 2013 um 15:01:09, schrieb Stephan Witt 
> > <st.w...@gmx.net>
> > > > Do you use 'make -jxxxx' ? I am unsure about the parallel compilation …
> > > 
> > > I'm having this problem too with Xcode and it's using definitively all 
> > > (8) cpus for parallel compilation.
> >  
> > And it is only with a fresh build-tree?
> 
> Im building out-of-source only.
> The build directory is removed completely before calling cmake.
> 
> > If so, then, maybe, we could have a solution.
> >  
> > In a fresh tree, the file lyx_date.h is missing.
> 
> Yes it is missing. That's the error message and I've verified that and 
> created it manually as a temporary work-around.

In that case, 'cmake -E copy_if_different' is not working as described.
Try the attached please.

> Stephan

        Kornel
#  Copyright (c) 2012, Kornel Benko, <kor...@lyx.org>
#
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#         derived from this software without specific prior written permission.
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#  THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
#  IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
#  OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
#  IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
#  INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
#  NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
#  DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
#  THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
#  (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
#  THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
#
# To call this script, one has to provide following parameters
# TOP_SRC_DIR
# TOP_CMAKE_PATH
# TOP_BINARY_DIR
# LYX_DATE:	to be used if not under git control


set(CMAKE_ALLOW_LOOSE_LOOP_CONSTRUCTS true)

FIND_PROGRAM(LYX_GITVERSION git)
if(LYX_GITVERSION)
  # Override the value from configure.ac, if possible
  EXECUTE_PROCESS(COMMAND ${LYX_GITVERSION} "log" "-1" "--format=%h %ci"
    WORKING_DIRECTORY "${TOP_SRC_DIR}"
    OUTPUT_VARIABLE LYX_DATEtmp OUTPUT_STRIP_TRAILING_WHITESPACE)

  if(LYX_DATEtmp MATCHES "^([0-9a-f]+) ([0-9]+-[0-9]+-[0-9]+)")
    set(LYX_GITHASH ${CMAKE_MATCH_1})
    set(LYX_DATE ${CMAKE_MATCH_2})
    message(STATUS "Git-hash = ${LYX_GITHASH}")
  endif()
endif()

if(NOT EXISTS ${TOP_BINARY_DIR}/lyx_date.h)
  configure_file(${TOP_CMAKE_PATH}/lyx_date.h.cmake ${TOP_BINARY_DIR}/lyx_date.h)
else()
  configure_file(${TOP_CMAKE_PATH}/lyx_date.h.cmake ${TOP_BINARY_DIR}/lyx_date.tmp)
  message(STATUS "Created ${TOP_BINARY_DIR}/lyx_date.tmp")

  EXECUTE_PROCESS(
    COMMAND ${CMAKE_COMMAND} -E copy_if_different ${TOP_BINARY_DIR}/lyx_date.tmp ${TOP_BINARY_DIR}/lyx_date.h
    ERROR_VARIABLE copy_err
  )

  if(copy_err)
    message(FATAL_ERROR "${CMAKE_COMMAND} -E ${copy_command} not working")
  endif()

  EXECUTE_PROCESS(
    COMMAND ${CMAKE_COMMAND} -E remove ${TOP_BINARY_DIR}/lyx_date.tmp
  )
endif()

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