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CMake: Show error in user projects if wasm toolchain file not found

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Rather than fail with obscure can't find Qt packages errors when the
Webassembly CMake toolchain file can not be found, error out with a
clear error on how to ensure it is found.

Pick-to: 6.2
Task-number: QTBUG-96843
Change-Id: I0f34cdcde05efb25c93017f3fd365186335ed52c
Reviewed-by: Joerg Bornemann <joerg.bornemann@qt.io>
This commit is contained in:
Alexandru Croitor 2021-09-27 12:27:23 +02:00
parent 5d840f0f7a
commit 2ed267c820
4 changed files with 31 additions and 5 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

6
cmake/QtAutoDetect.cmake
View File

@ -43,11 +43,7 @@ function(qt_auto_detect_wasm)
message(STATUS
"Emscripten ${EMCC_VERSION} toolchain file detected at ${CMAKE_TOOLCHAIN_FILE}")
else()
message(FATAL_ERROR
"Cannot find the toolchain file Emscripten.cmake. "
"Please specify the toolchain file with -DCMAKE_TOOLCHAIN_FILE=<file> "
"or provide a path to a valid emscripten installation via the EMSDK "
"environment variable.")
__qt_internal_show_error_no_emscripten_toolchain_file_found_when_building_qt()
endif()
qt_internal_ensure_static_qt_config()

16
cmake/QtPublicWasmToolchainHelpers.cmake
View File

@ -53,3 +53,19 @@ function(__qt_internal_get_emcc_recommended_version out_var)
set(QT_EMCC_RECOMMENDED_VERSION "2.0.14")
set(${out_var} "${QT_EMCC_RECOMMENDED_VERSION}" PARENT_SCOPE)
endfunction()
function(__qt_internal_show_error_no_emscripten_toolchain_file_found_when_building_qt)
message(FATAL_ERROR
"Cannot find the toolchain file Emscripten.cmake. "
"Please specify the toolchain file with -DCMAKE_TOOLCHAIN_FILE=<file> "
"or provide a path to a valid emscripten installation via the EMSDK "
"environment variable.")
endfunction()
function(__qt_internal_show_error_no_emscripten_toolchain_file_found_when_using_qt)
message(FATAL_ERROR
"Cannot find the toolchain file Emscripten.cmake. "
"Please specify the toolchain file with -DQT_CHAINLOAD_TOOLCHAIN_FILE=<file> "
"or provide a path to a valid emscripten installation via the EMSDK "
"environment variable.")
endfunction()

11
cmake/QtToolchainHelpers.cmake
View File

@ -235,14 +235,25 @@ if(DEFINED ENV{EMSDK} AND NOT \"\$ENV{EMSDK}\" STREQUAL \"\")
\"\${__qt_toolchain_emroot_path}\" _qt_candidate_emscripten_toolchain_path)
set(__qt_chainload_toolchain_file \"\${_qt_candidate_emscripten_toolchain_path}\")
endif()
")
list(APPEND init_post_chainload_toolchain "
if(NOT __qt_chainload_toolchain_file_included)
__qt_internal_show_error_no_emscripten_toolchain_file_found_when_using_qt()
endif()
")
endif()
string(REPLACE ";" "\n" init_additional_used_variables
"${init_additional_used_variables}")
string(REPLACE ";" "\n" init_vcpkg "${init_vcpkg}")
string(REPLACE ";" "\n" init_platform "${init_platform}")
string(REPLACE "LITERAL_SEMICOLON" ";" init_platform "${init_platform}")
string(REPLACE ";" "\n" init_post_chainload_toolchain "${init_post_chainload_toolchain}")
string(REPLACE "LITERAL_SEMICOLON" ";" init_post_chainload_toolchain
"${init_post_chainload_toolchain}")
qt_compute_relative_path_from_cmake_config_dir_to_prefix()
configure_file(
"${CMAKE_CURRENT_SOURCE_DIR}/cmake/qt.toolchain.cmake.in"

3
cmake/qt.toolchain.cmake.in
View File

@ -43,10 +43,13 @@ if(__qt_chainload_toolchain_file)
"'${__qt_chainload_toolchain_file}' does not exist.")
else()
include("${__qt_chainload_toolchain_file}")
set(__qt_chainload_toolchain_file_included TRUE)
endif()
unset(__qt_chainload_toolchain_file)
endif()
@init_post_chainload_toolchain@
# Compute dynamically the Qt installation prefix from the location of this file. This allows
# the usage of the toolchain file when the Qt installation is relocated.
get_filename_component(QT_TOOLCHAIN_RELOCATABLE_INSTALL_PREFIX