[cmake-developers] Custom commands with Ninja on Windows

[Martin Ankerl]

Hi!

I've run into the same problem with many custom commands as discussed here:
http://thread.gmane.org/gmane.comp.programming.tools.cmake.devel/13434
Which is referenced in this bug report:
https://cmake.org/Bug/view.php?id=15612#c38924

I've had a look at this problem because this is the only thing that blocks
us from using ninja.

It seems to me that there are two possible solution:


* use a response file (rspfile and rspfile_content). This unfortunately is
only possible when modifying ninja to support multiline response files. As
far as I know this is not possible now. (the $in_newline does not work in
this case)


* Add a build target for each custom command, e.g. instead of

E.g. instead of an output like this:
----------------
build CMakeFiles\copy_czmq_3.0.2.util: CUSTOM_COMMAND
  COMMAND = cmd.exe /C "cd /D C:\dev\ras_robvis\vc140_x64_ninja &&
"c:\Program Files (x86)\CMake\bin\cmake.exe" -E copy_if_different
"C:/dev/ras_robvis/src/ext/lib_czmq/3.0.2/vc140_x64/czmq.dll"
"C:/dev/ras_robvis/vc140_x64_ninja/bin/./czmq.dll" && cd /D
C:\dev\ras_robvis\vc140_x64_ninja && "c:\Program Files
(x86)\CMake\bin\cmake.exe" -E copy_if_different
"C:/dev/ras_robvis/src/ext/lib_czmq/3.0.2/vc140_x64/czmqd.dll"
"C:/dev/ras_robvis/vc140_x64_ninja/bin/./czmqd.dll""
  DESC = Running utility command for copy_czmq_3.0.2
  restat = 1
build copy_czmq_3.0.2: phony CMakeFiles\copy_czmq_3.0.2.util
----------------

produce an output like this:
----------------
build CMakeFiles\copy_czmq_3.0.2.util.1: CUSTOM_COMMAND
  COMMAND = cmd.exe /C "cd /D C:\dev\ras_robvis\vc140_x64_ninja &&
"c:\Program Files (x86)\CMake\bin\cmake.exe" -E copy_if_different
"C:/dev/ras_robvis/src/ext/lib_czmq/3.0.2/vc140_x64/czmq.dll"
"C:/dev/ras_robvis/vc140_x64_ninja/bin/./czmq.dll""
  restat = 1

build CMakeFiles\copy_czmq_3.0.2.util.2: CUSTOM_COMMAND
  COMMAND = cmd.exe /C "cd /D C:\dev\ras_robvis\vc140_x64_ninja &&
"c:\Program Files (x86)\CMake\bin\cmake.exe" -E copy_if_different
"C:/dev/ras_robvis/src/ext/lib_czmq/3.0.2/vc140_x64/czmqd.dll"
"C:/dev/ras_robvis/vc140_x64_ninja/bin/./czmqd.dll""
  restat = 1

build CMakeFiles\copy_czmq_3.0.2.util: phony |
CMakeFiles\copy_czmq_3.0.2.util.1 CMakeFiles\copy_czmq_3.0.2.util.2
  DESC = Running utility command for copy_czmq_3.0.2

build copy_czmq_3.0.2: phony CMakeFiles\copy_czmq_3.0.2.util
----------------


I did not yet have a look at the cmake code so I am not sure how difficult
it is to implement this, or even if this is the best way to solve this.

Any comments? is this reasonable?

Martin

-- 
Martin
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://public.kitware.com/pipermail/cmake-developers/attachments/20160519/7376c0bb/attachment.html>