diff options
| -rw-r--r-- | Help/manual/cmake-policies.7.rst | 1 | ||||
| -rw-r--r-- | Help/policy/CMP0088.rst | 29 | ||||
| -rw-r--r-- | Help/release/dev/bison_target_policy.rst | 6 | ||||
| -rw-r--r-- | Modules/FindBISON.cmake | 38 | ||||
| -rw-r--r-- | Source/cmPolicies.h | 3 |
5 files changed, 73 insertions, 4 deletions
diff --git a/Help/manual/cmake-policies.7.rst b/Help/manual/cmake-policies.7.rst index 40ec1ef..409b5b1 100644 --- a/Help/manual/cmake-policies.7.rst +++ b/Help/manual/cmake-policies.7.rst @@ -57,6 +57,7 @@ Policies Introduced by CMake 3.14 .. toctree:: :maxdepth: 1 + CMP0088: FindBISON runs bison in CMAKE_CURRENT_BINARY_DIR when executing. </policy/CMP0088> CMP0087: install(SCRIPT | CODE) supports generator expressions. </policy/CMP0087> CMP0086: UseSWIG honors SWIG_MODULE_NAME via -module flag. </policy/CMP0086> CMP0085: IN_LIST generator expression handles empty list items. </policy/CMP0085> diff --git a/Help/policy/CMP0088.rst b/Help/policy/CMP0088.rst new file mode 100644 index 0000000..82c04ef --- /dev/null +++ b/Help/policy/CMP0088.rst @@ -0,0 +1,29 @@ +CMP0088 +------- + +:module:`FindBISON` runs bison in :variable:`CMAKE_CURRENT_BINARY_DIR` +when executing. + +The module provides a ``BISON_TARGET`` macro which generates BISON output. +In CMake 3.13 and below the macro would generate a custom command that runs +``bison`` in the source directory. CMake 3.14 and later prefer to run it +in the build directory and use :variable:`CMAKE_CURRENT_BINARY_DIR` as the +``WORKING_DIRECTORY`` of its :command:`add_custom_command` invocation. +This ensures that any implicitly generated file is written to the build +tree rather than the source. + +This policy provides compatibility for projects that have not been updated +to expect the new behavior. + +The ``OLD`` behavior for this policy is for ``BISON_TARGET`` to use +the current source directory for the ``WORKING_DIRECTORY`` and where +to generate implicit files. The ``NEW`` behavior of this policy is to +use the current binary directory for the ``WORKING_DIRECTORY`` and where +to generate implicit files. + +This policy was introduced in CMake version 3.14. Use the +:command:`cmake_policy` command to set it to ``OLD`` or ``NEW`` explicitly. +Unlike most policies, CMake version |release| does *not* warn +when this policy is not set and simply uses ``OLD`` behavior. + +.. include:: DEPRECATED.txt diff --git a/Help/release/dev/bison_target_policy.rst b/Help/release/dev/bison_target_policy.rst new file mode 100644 index 0000000..3240318 --- /dev/null +++ b/Help/release/dev/bison_target_policy.rst @@ -0,0 +1,6 @@ +bison_target_policy +------------------- + +* The :module:`FindBISON` module's ``BISON_TARGET`` command now runs ``bison`` + with :variable:`CMAKE_CURRENT_BINARY_DIR` as the working directory. + See policy :policy:`CMP0088`. diff --git a/Modules/FindBISON.cmake b/Modules/FindBISON.cmake index d59dc27..06ac2d9 100644 --- a/Modules/FindBISON.cmake +++ b/Modules/FindBISON.cmake @@ -151,7 +151,15 @@ if(BISON_EXECUTABLE) list(APPEND BISON_TARGET_cmdopt "--report-file=${BISON_TARGET_verbose_file}") endif() if(NOT IS_ABSOLUTE "${BISON_TARGET_verbose_file}") - set(BISON_TARGET_verbose_file "${CMAKE_CURRENT_SOURCE_DIR}/${BISON_TARGET_verbose_file}") + cmake_policy(GET CMP0088 _BISON_CMP0088 + PARENT_SCOPE # undocumented, do not use outside of CMake + ) + if("x${_BISON_CMP0088}x" STREQUAL "xNEWx") + set(BISON_TARGET_verbose_file "${CMAKE_CURRENT_BINARY_DIR}/${BISON_TARGET_verbose_file}") + else() + set(BISON_TARGET_verbose_file "${CMAKE_CURRENT_SOURCE_DIR}/${BISON_TARGET_verbose_file}") + endif() + unset(_BISON_CMP0088) endif() endmacro() @@ -159,6 +167,15 @@ if(BISON_EXECUTABLE) # adds a custom command and sets # BISON_TARGET_cmdopt, BISON_TARGET_extraoutputs macro(BISON_TARGET_option_verbose Name BisonOutput filename) + cmake_policy(GET CMP0088 _BISON_CMP0088 + PARENT_SCOPE # undocumented, do not use outside of CMake + ) + set(_BISON_WORKING_DIRECTORY ${CMAKE_CURRENT_SOURCE_DIR}) + if("x${_BISON_CMP0088}x" STREQUAL "xNEWx") + set(_BISON_WORKING_DIRECTORY ${CMAKE_CURRENT_BINARY_DIR}) + endif() + unset(_BISON_CMP0088) + list(APPEND BISON_TARGET_cmdopt "--verbose") list(APPEND BISON_TARGET_outputs "${BISON_TARGET_verbose_file}") @@ -166,8 +183,9 @@ if(BISON_EXECUTABLE) if(IS_ABSOLUTE "${filename}") set(BISON_TARGET_verbose_extra_file "${filename}") else() - set(BISON_TARGET_verbose_extra_file "${CMAKE_CURRENT_SOURCE_DIR}/${filename}") + set(BISON_TARGET_verbose_extra_file "${_BISON_WORKING_DIRECTORY}/${filename}") endif() + add_custom_command(OUTPUT ${BISON_TARGET_verbose_extra_file} COMMAND ${CMAKE_COMMAND} -E copy "${BISON_TARGET_verbose_file}" @@ -176,10 +194,11 @@ if(BISON_EXECUTABLE) DEPENDS "${BISON_TARGET_verbose_file}" COMMENT "[BISON][${Name}] Copying bison verbose table to ${filename}" - WORKING_DIRECTORY ${CMAKE_CURRENT_SOURCE_DIR}) + WORKING_DIRECTORY ${_BISON_WORKING_DIRECTORY}) list(APPEND BISON_TARGET_extraoutputs "${BISON_TARGET_verbose_extra_file}") unset(BISON_TARGET_verbose_extra_file) + unset(_BISON_WORKING_DIRECTORY) endif() endmacro() @@ -234,12 +253,23 @@ if(BISON_EXECUTABLE) list(APPEND BISON_TARGET_outputs "${BISON_TARGET_output_header}") + cmake_policy(GET CMP0088 _BISON_CMP0088 + PARENT_SCOPE # undocumented, do not use outside of CMake + ) + set(_BISON_WORKING_DIRECTORY ${CMAKE_CURRENT_SOURCE_DIR}) + if("x${_BISON_CMP0088}x" STREQUAL "xNEWx") + set(_BISON_WORKING_DIRECTORY ${CMAKE_CURRENT_BINARY_DIR}) + endif() + unset(_BISON_CMP0088) + add_custom_command(OUTPUT ${BISON_TARGET_outputs} COMMAND ${BISON_EXECUTABLE} ${BISON_TARGET_cmdopt} -o ${BisonOutput} ${BisonInput} VERBATIM DEPENDS ${BisonInput} COMMENT "[BISON][${Name}] Building parser with bison ${BISON_VERSION}" - WORKING_DIRECTORY ${CMAKE_CURRENT_SOURCE_DIR}) + WORKING_DIRECTORY ${_BISON_WORKING_DIRECTORY}) + + unset(_BISON_WORKING_DIRECTORY) # define target variables set(BISON_${Name}_DEFINED TRUE) diff --git a/Source/cmPolicies.h b/Source/cmPolicies.h index 206dd3d..314f27d 100644 --- a/Source/cmPolicies.h +++ b/Source/cmPolicies.h @@ -258,6 +258,9 @@ class cmMakefile; SELECT(POLICY, CMP0087, \ "Install CODE|SCRIPT allow the use of generator " \ "expressions.", \ + 3, 14, 0, cmPolicies::WARN) \ + SELECT(POLICY, CMP0088, \ + "FindBISON runs bison in CMAKE_CURRENT_BINARY_DIR when executing.", \ 3, 14, 0, cmPolicies::WARN) #define CM_SELECT_ID(F, A1, A2, A3, A4, A5, A6) F(A1) |