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core-utils - make the swig generated source file dependent on the core-utils headers

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That should trigger a regeneration of these swig sources if
any of the header files change.
This is done via a small macro that can be reused for other wrappers as well.

Note
cmake 3.15 introduces a 'FILTER' generator expression
that might allow us to do something like the following:
$<FILTER:$<TARGET_PROPERTY:baselib,SOURCES>,INCLUDE,"*.h[pp]?$">
I toyed briefly with that idea but it currently has two issues:
1. 3.15 is newer than our current minimum cmake requirement, so we can't
   depend in that feature yet.
2. the sources are relative to *their* source directory, which
   is different from the one in which the wrappers are generated
   So they should still be properly transformed into absolute paths
This commit is contained in:
Geert Janssens 2019-10-02 23:14:31 +02:00
parent a1898daf6c
commit a6b7eecd81
3 changed files with 28 additions and 1 deletions
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5
bindings/guile/CMakeLists.txt
View File

@ -1,9 +1,12 @@
add_subdirectory(test)
# Command to generate the swig-core-utils-guile.c wrapper file
gnc_swig_extract_header_files (gnc-core-utils CORE_UTILS_HEADERS)
gnc_add_swig_guile_command (swig-core-utils-guile-c
SWIG_CORE_UTILS_GUILE_C swig-core-utils-guile.c
${CMAKE_SOURCE_DIR}/bindings/core-utils.i ${CMAKE_SOURCE_DIR}/libgnucash/core-utils
${CMAKE_SOURCE_DIR}/bindings/core-utils.i
${CMAKE_SOURCE_DIR}/libgnucash/core-utils
${CORE_UTILS_HEADERS}
)
set(guile_HEADERS

2
bindings/python/CMakeLists.txt
View File

@ -47,10 +47,12 @@ gnc_add_swig_python_command (swig-gnucash-core
)
# Command to generate the swig-core-utils-python.c wrapper file
gnc_swig_extract_header_files (gnc-core-utils CORE_UTILS_HEADERS)
gnc_add_swig_python_command (swig-core-utils-python
SWIG_CORE_UTILS_PYTHON_C SWIG_CORE_UTILS_PYTHON_PY
swig-core-utils-python.c sw_core_utils.py
${CMAKE_SOURCE_DIR}/bindings/core-utils.i ${CMAKE_SOURCE_DIR}/libgnucash/core-utils
${CORE_UTILS_HEADERS}
)
if(WITH_PYTHON)

22
common/cmake_modules/GncAddSwigCommand.cmake
View File

@ -90,3 +90,25 @@ macro (gnc_add_swig_python_command _target _out_var _py_out_var _output _py_outp
)
add_custom_target(${_target} ALL DEPENDS ${outfile} ${py_outfile} ${CMAKE_SOURCE_DIR}/common/base-typemaps.i ${_input} ${ARGN})
endmacro()
# The swig wrappers need to know the header files ("the interface")
# for the library they are wrapping.
# We can extract those from the target's SOURCES property
# Using a few ordinary cmake commands
macro (gnc_swig_extract_header_files _target _variable)
set(${_variable} "")
get_target_property(_headers ${_target} SOURCES)
if(_headers)
list(FILTER _headers INCLUDE REGEX ".*[.]h(pp)?$")
get_target_property(_srcdir ${_target} SOURCE_DIR)
foreach (_header ${_headers})
if(NOT IS_ABSOLUTE "${_header}")
set(_header_abs "${_srcdir}/${_header}")
else()
set(_header_abs "${_header}")
endif()
list (APPEND ${_variable} "${_header_abs}")
endforeach ()
endif()
endmacro()