qt5base-lts/cmake/QtGenerateLibPri.cmake
Li Xinwei 2c49f85380 CMake: Fix generated prl and pri files for MSVC
In MSVC static build, if we build Qt with 3rdparty library (e.g. zstd),
cmake will add"zstd" (without "-l" prefix) to Qt6Core.prl. Then we
use this Qt to build a qmake project, compilation will fail due to
missing zstd.obj. Without "-l" prefix, qmake will treat "zstd" as an
object file instead of a library.

Library names in qt_module.pri and qt_lib_*_private.pri are also
missing "-l" prefix.

This is because on most compilers, CMAKE_LINK_LIBRARY_FLAG equals
"-l". But on MSVC, it is an empty string. So we should pass
"-DLINK_LIBRARY_FLAG=-l" for MSVC.

Also add "-L/path/to/library" if the library path is not in default
linker search directories. This will write un-relocatable paths to prl
files only when using 3rdparty libraries to build Qt statically. Usually
it's not a problem.

In addition, CMAKE_CXX_IMPLICIT_INCLUDE_DIRECTORIES is also empty on
MSVC. So The third argument of "$<FILTER>" is empty, it is an invalid
generator expression. This means no include dir will be written to
qt_module.pri and qt_lib_*_private.pri on MSVC. So only use "$<FILTER>"
when CMAKE_CXX_IMPLICIT_INCLUDE_DIRECTORIES is not empty.

Pick-to: 6.1
Change-Id: Ib66f95dc09cf920363a4b9338fb97747dd2f8ab7
Reviewed-by: Qt CI Bot <qt_ci_bot@qt-project.org>
Reviewed-by: Alexandru Croitor <alexandru.croitor@qt.io>
2021-06-02 13:32:06 +08:00

101 lines
3.9 KiB
CMake

# Generate a qt_lib_XXX.pri file.
#
# This file is to be used in CMake script mode with the following variables set:
# IN_FILES: path to the qt_lib_XXX.cmake files
# OUT_FILE: path to the generated qt_lib_XXX.pri file
# CONFIGS: the configurations Qt is being built with
# LIBRARY_SUFFIXES: list of known library extensions, e.g. .so;.a on Linux
# LIBRARY_PREFIXES: list of known library prefies, e.g. the "lib" in "libz" on on Linux
# LINK_LIBRARY_FLAG: flag used to link a shared library to an executable, e.g. -l on UNIX
# IMPLICIT_LINK_DIRECTORIES: list of implicit linker search paths
#
# QMAKE_LIBS_XXX values are split into QMAKE_LIBS_XXX_DEBUG and QMAKE_LIBS_XXX_RELEASE if
# debug_and_release was detected. The CMake configuration "Debug" is considered for the _DEBUG
# values. The first config that is not "Debug" is treated as _RELEASE.
#
# The library values are transformed from an absolute path into link flags
# aka from "/usr/lib/x86_64-linux-gnu/libcups.so" to "-lcups".
cmake_policy(SET CMP0057 NEW)
# Create a qmake-style list from the passed arguments and store it in ${out_var}.
function(qmake_list out_var)
set(result "")
# Surround values that contain spaces with double quotes.
foreach(v ${ARGN})
if(v MATCHES " " AND NOT MATCHES "^-framework")
set(v "\"${v}\"")
endif()
list(APPEND result ${v})
endforeach()
list(JOIN result " " result)
set(${out_var} ${result} PARENT_SCOPE)
endfunction()
include("${CMAKE_CURRENT_LIST_DIR}/QtGenerateLibHelpers.cmake")
list(POP_FRONT IN_FILES in_pri_file)
file(READ ${in_pri_file} content)
string(APPEND content "\n")
foreach(in_file ${IN_FILES})
include(${in_file})
endforeach()
list(REMOVE_DUPLICATES known_libs)
set(is_debug_and_release FALSE)
if("Debug" IN_LIST CONFIGS AND ("Release" IN_LIST CONFIGS OR "RelWithDebInfo" IN_LIST CONFIGS))
set(is_debug_and_release TRUE)
set(release_configs ${CONFIGS})
list(REMOVE_ITEM release_configs "Debug")
list(GET release_configs 0 release_cfg)
string(TOUPPER "${release_cfg}" release_cfg)
endif()
foreach(lib ${known_libs})
set(configuration_independent_infixes LIBDIR INCDIR DEFINES)
if(is_debug_and_release)
set(value_debug ${QMAKE_LIBS_${lib}_DEBUG})
set(value_release ${QMAKE_LIBS_${lib}_${release_cfg}})
qt_transform_absolute_library_paths_to_link_flags(value_debug "${value_debug}")
qt_transform_absolute_library_paths_to_link_flags(value_release "${value_release}")
if(value_debug STREQUAL value_release)
qmake_list(value_debug ${value_debug})
string(APPEND content "QMAKE_LIBS_${lib} = ${value_debug}\n")
else()
string(APPEND content "QMAKE_LIBS_${lib} =\n")
if(value_debug)
qmake_list(value_debug ${value_debug})
string(APPEND content "QMAKE_LIBS_${lib}_DEBUG = ${value_debug}\n")
endif()
if(value_release)
qmake_list(value_release ${value_release})
string(APPEND content "QMAKE_LIBS_${lib}_RELEASE = ${value_release}\n")
endif()
endif()
else()
list(APPEND configuration_independent_infixes LIBS)
endif()
# The remaining values are considered equal for all configurations.
# Pick the first configuration and use its values.
list(GET CONFIGS 0 cfg)
string(TOUPPER ${cfg} cfg)
foreach(infix ${configuration_independent_infixes})
set(value ${QMAKE_${infix}_${lib}_${cfg}})
if(infix STREQUAL "LIBS")
qt_transform_absolute_library_paths_to_link_flags(value "${value}")
elseif("${value}" STREQUAL "")
# Do not write empty entries, but ensure to write at least
# the QMAKE_LIBS_FOO entry to make the lib 'foo' known.
continue()
endif()
qmake_list(value ${value})
string(APPEND content "QMAKE_${infix}_${lib} = ${value}\n")
endforeach()
endforeach()
file(WRITE "${OUT_FILE}" "${content}")