MantisBT - CMake

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Project

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Date Submitted

Last Update

0015286

CMake

public

2014-12-05 08:57

2015-05-04 09:05

Reporter

Jaak Ristioja

Assigned To

Priority

normal

Severity

major

Reproducibility

always

Status

closed

Resolution

duplicate

Platform

OS Version

Product Version

Target Version

Fixed in Version

Summary

0015286: ExternalProject double build with parallel make and multiple targets

Description

Given a project like this:

    cmake_minimum_required(VERSION 2.8.12)
    project(bad NONE)
    include(ExternalProject)
    ExternalProject_Add(a
      DOWNLOAD_COMMAND sleep 1
      CONFIGURE_COMMAND sleep 1
      BUILD_COMMAND sleep 1
      INSTALL_COMMAND date +%N | tee a)
    ExternalProject_Add(b
      DOWNLOAD_COMMAND sleep 1
      CONFIGURE_COMMAND sleep 1
      BUILD_COMMAND sleep 1
      INSTALL_COMMAND touch b
      DEPENDS a)

Running something like "make -j2 a b" causes target "a" to be built twice:

    [ 12%] [ 12%] Creating directories for 'a'
    Creating directories for 'a'
    [ 25%] [ 25%] Performing download step for 'a'
    Performing download step for 'a'
    [ 50%] [ 50%] [ 50%] [ 50%] No patch step for 'a'
    No update step for 'a'
    No update step for 'a'
    No patch step for 'a'
    [ 62%] [ 62%] Performing configure step for 'a'
    Performing configure step for 'a'
    [ 75%] [ 75%] Performing build step for 'a'
    Performing build step for 'a'
    [ 87%] [ 87%] Performing install step for 'a'
    Performing install step for 'a'
    506615761
    506738194
    [100%] [100%] Completed 'a'
    Completed 'a'
    [100%] [100%] Built target a
    Built target a
    Creating directories for 'b'
    Performing download step for 'b'
    No patch step for 'b'
    No update step for 'b'
    Performing configure step for 'b'
    Performing build step for 'b'
    Performing install step for 'b'
    Completed 'b'
    Built target b

Steps To Reproduce

Additional Information

Using CMake 2.8.12 and GNU make 4.0. This issue also seems to be have been reported in the mailing list: http://public.kitware.com/pipermail/cmake/2013-July/055214.html [^]