Build or-tools 7.1 with cmake

Question

我正在尝试在Linux Mint 20 Ulyana (基于ubuntu焦点)中使用cmake (3.16.3)构建or-tools版本7.1

我正在遵循这里的说明，https://github.com/google/or-tools/blob/f3fd201e68cf75b7720ff5c3cadc599a1d02b54b/cmake/README.md

首先，我运行了cmake -H. -Bbuild -G "Unix Makefiles"，但由于找不到依赖项，所以我用cmake -H. -Bbuild -G "Unix Makefiles" -DBUILD_DEPS=ON替换了它

但过了一段时间后，我得到了以下错误

[ 55%] No test step for 'Cbc_project'
[ 66%] Completed 'Cbc_project'
[100%] Built target Cbc_project
-- Building Cbc: ...DONE
-- Configuring done
CMake Error at ortools/constraint_solver/CMakeLists.txt:57 (add_dependencies):
  The dependency target "absl::container" of target
  "ortools_constraint_solver" does not exist.


CMake Error at ortools/glop/CMakeLists.txt:50 (add_dependencies):
  The dependency target "absl::container" of target "ortools_glop" does not
  exist.


CMake Error at ortools/linear_solver/CMakeLists.txt:54 (add_dependencies):
  The dependency target "absl::container" of target "ortools_linear_solver"
  does not exist.


CMake Error at ortools/sat/CMakeLists.txt:60 (add_dependencies):
  The dependency target "absl::container" of target "ortools_sat" does not
  exist.


CMake Error at ortools/constraint_solver/CMakeLists.txt:33 (target_compile_options):
  Error evaluating generator expression:

    $<TARGET_PROPERTY:absl::container,INTERFACE_COMPILE_OPTIONS>

  Target "absl::container" not found.


CMake Error at ortools/constraint_solver/CMakeLists.txt:45 (target_compile_definitions):
  Error evaluating generator expression:

    $<TARGET_PROPERTY:absl::container,INTERFACE_COMPILE_DEFINITIONS>

  Target "absl::container" not found.


CMake Error at ortools/constraint_solver/CMakeLists.txt:20 (target_include_directories):
  Error evaluating generator expression:

    $<TARGET_PROPERTY:absl::container,INTERFACE_INCLUDE_DIRECTORIES>

  Target "absl::container" not found.


CMake Error at ortools/constraint_solver/CMakeLists.txt:45 (target_compile_definitions):
  Error evaluating generator expression:

    $<TARGET_PROPERTY:absl::container,INTERFACE_COMPILE_DEFINITIONS>

  Target "absl::container" not found.


CMake Error at ortools/constraint_solver/CMakeLists.txt:20 (target_include_directories):
  Error evaluating generator expression:

    $<TARGET_PROPERTY:absl::container,INTERFACE_INCLUDE_DIRECTORIES>

  Target "absl::container" not found.


CMake Error at ortools/glop/CMakeLists.txt:30 (target_compile_options):
  Error evaluating generator expression:

    $<TARGET_PROPERTY:absl::container,INTERFACE_COMPILE_OPTIONS>

  Target "absl::container" not found.


CMake Error at ortools/glop/CMakeLists.txt:40 (target_compile_definitions):
  Error evaluating generator expression:

    $<TARGET_PROPERTY:absl::container,INTERFACE_COMPILE_DEFINITIONS>

  Target "absl::container" not found.


CMake Error at ortools/glop/CMakeLists.txt:19 (target_include_directories):
  Error evaluating generator expression:

    $<TARGET_PROPERTY:absl::container,INTERFACE_INCLUDE_DIRECTORIES>

  Target "absl::container" not found.


CMake Error at ortools/glop/CMakeLists.txt:40 (target_compile_definitions):
  Error evaluating generator expression:

    $<TARGET_PROPERTY:absl::container,INTERFACE_COMPILE_DEFINITIONS>

  Target "absl::container" not found.


CMake Error at ortools/glop/CMakeLists.txt:19 (target_include_directories):
  Error evaluating generator expression:

    $<TARGET_PROPERTY:absl::container,INTERFACE_INCLUDE_DIRECTORIES>

  Target "absl::container" not found.


CMake Error at ortools/linear_solver/CMakeLists.txt:32 (target_compile_options):
  Error evaluating generator expression:

    $<TARGET_PROPERTY:absl::container,INTERFACE_COMPILE_OPTIONS>

  Target "absl::container" not found.


CMake Error at ortools/linear_solver/CMakeLists.txt:43 (target_compile_definitions):
  Error evaluating generator expression:

    $<TARGET_PROPERTY:absl::container,INTERFACE_COMPILE_DEFINITIONS>

  Target "absl::container" not found.


CMake Error at ortools/linear_solver/CMakeLists.txt:20 (target_include_directories):
  Error evaluating generator expression:

    $<TARGET_PROPERTY:absl::container,INTERFACE_INCLUDE_DIRECTORIES>

  Target "absl::container" not found.


CMake Error at ortools/linear_solver/CMakeLists.txt:43 (target_compile_definitions):
  Error evaluating generator expression:

    $<TARGET_PROPERTY:absl::container,INTERFACE_COMPILE_DEFINITIONS>

  Target "absl::container" not found.


CMake Error at ortools/linear_solver/CMakeLists.txt:20 (target_include_directories):
  Error evaluating generator expression:

    $<TARGET_PROPERTY:absl::container,INTERFACE_INCLUDE_DIRECTORIES>

  Target "absl::container" not found.


CMake Error at ortools/sat/CMakeLists.txt:34 (target_compile_options):
  Error evaluating generator expression:

    $<TARGET_PROPERTY:absl::container,INTERFACE_COMPILE_OPTIONS>

  Target "absl::container" not found.


CMake Error at ortools/sat/CMakeLists.txt:47 (target_compile_definitions):
  Error evaluating generator expression:

    $<TARGET_PROPERTY:absl::container,INTERFACE_COMPILE_DEFINITIONS>

  Target "absl::container" not found.


CMake Error at ortools/sat/CMakeLists.txt:20 (target_include_directories):
  Error evaluating generator expression:

    $<TARGET_PROPERTY:absl::container,INTERFACE_INCLUDE_DIRECTORIES>

  Target "absl::container" not found.


CMake Error at ortools/sat/CMakeLists.txt:47 (target_compile_definitions):
  Error evaluating generator expression:

    $<TARGET_PROPERTY:absl::container,INTERFACE_COMPILE_DEFINITIONS>

  Target "absl::container" not found.


CMake Error at ortools/sat/CMakeLists.txt:20 (target_include_directories):
  Error evaluating generator expression:

    $<TARGET_PROPERTY:absl::container,INTERFACE_INCLUDE_DIRECTORIES>

  Target "absl::container" not found.


-- Generating done
CMake Generate step failed.  Build files cannot be regenerated correctly.

提前谢谢你！

Answer 1

CMake在7.1中没有完全实现。

为什么要停留在7.1上？为什么不在7.1中使用make？

Answer 2

问题是abseil-cpp master已经丢弃了absl::container CMake目标。

总而言之，在v7.1中，当使用-DBUILD_DEPS=ON构建所有deps时，基于CMake的构建将使用abseil-cpp主分支ref：https://github.com/google/or-tools/blob/f3fd201e68cf75b7720ff5c3cadc599a1d02b54b/cmake/dependencies/CMakeLists.txt#L50-L59

但是从v7.1版本开始，absl::container目标就被删除了

空的absl：：容器目标已从CMake构建中删除。此目标没有任何影响，并且可以安全地删除用户代码中对此目标的引用。请参阅：https://github.com/abseil/abseil-cpp/releases/tag/20210324.2

一种可能的解决方法是在cmake/dependencies/CMakeLists.txt#L50-L59中将标记master更改为20200923.3

，但正如所说，我们强烈建议您使用最新的稳定版本v9.1