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CMake: Generate relative #line directives in qlalr output

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When passing an absolute input file name to qlalr, the #line directives
in the output will contain absolute paths.  For reproducible builds,
it's desirable to have relative paths.

Pass the input file as relative path to qlalr to produce relative #line
directives.

Fixes: QTBUG-96267
Change-Id: I4ef1e4d5be7cbaf25a54a34ab7c2dbec06411a1d
Reviewed-by: Alexandru Croitor <alexandru.croitor@qt.io>
This commit is contained in:
Joerg Bornemann 2021-10-05 15:42:04 +02:00
parent 08a0ba5733
commit 01bfed1d0a
1 changed files with 10 additions and 1 deletions
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11
cmake/QtLalrHelpers.cmake
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@ -39,13 +39,22 @@ function(qt_process_qlalr consuming_target input_file_list flags)
qt_qlalr_find_option_in_list("${input_file_lines}" "^%impl(.+)" "impl")
get_filename_component(base_file_name ${input_file} NAME_WE)
# Pass a relative input file path to qlalr to generate relative #line directives.
if(IS_ABSOLUTE "${input_file}")
set(absolute_input_file "${input_file}")
else()
get_filename_component(absolute_input_file "${input_file}" ABSOLUTE)
endif()
file(RELATIVE_PATH relative_input_file "${CMAKE_CURRENT_BINARY_DIR}"
"${absolute_input_file}")
set(cpp_file "${parser}.cpp")
set(private_file "${parser}_p.h")
set(decl_file "${decl}")
set(impl_file "${impl}")
add_custom_command(
OUTPUT ${cpp_file} ${private_file} ${decl_file} ${impl_file}
COMMAND ${QT_CMAKE_EXPORT_NAMESPACE}::qlalr ${flags} ${input_file}
COMMAND ${QT_CMAKE_EXPORT_NAMESPACE}::qlalr ${flags} ${relative_input_file}
DEPENDS ${QT_CMAKE_EXPORT_NAMESPACE}::qlalr
MAIN_DEPENDENCY ${input_file}
)