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CMake: Force vcpkg to use CMAKE_CXX_COMPILER as specified to CMake

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Override the vcpkg/scripts/detect_compiler behavior of always pulling
$CC and $CXX at the time that vcpkg install is determined to need called
by forcing $ENV{CXX} and $ENV{CC} to our CMake-determined compiler.

This prevents strange behavior such as running the following:

./Meta/ladybird.sh run
    make changes...
ninja -C Build/ladybird

Where the second build step would be run without CC or CXX set in the
environment, causing a total cache miss from vcpkg and a full rebuild.

It also helps prevent full rebuilds when an IDE passes a slightly
different compiler to the build step than ladybird.sh.
This commit is contained in:
Andrew Kaster 2024-07-17 11:17:48 -06:00 committed by Andreas Kling
parent 1e4720700c
commit 8e5d28de3c
Notes: sideshowbarker 2024-07-18 23:45:52 +09:00 
Author: https://github.com/ADKaster
Commit: https://github.com/LadybirdBrowser/ladybird/commit/8e5d28de3cb
Pull-request: https://github.com/LadybirdBrowser/ladybird/pull/689
7 changed files with 22 additions and 4 deletions
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5
CMakeLists.txt
View file

@ -7,6 +7,11 @@ if (VCPKG_TARGET_ANDROID)
include("Ladybird/Android/vcpkg_android.cmake")
endif()
# Pass additional information to vcpkg toolchain files if we are using vcpkg.
if (CMAKE_TOOLCHAIN_FILE MATCHES "vcpkg.cmake$")
set(CMAKE_PROJECT_ladybird_INCLUDE_BEFORE "Meta/CMake/vcpkg/generate_vcpkg_toolchain_variables.cmake")
endif()
project(ladybird
VERSION 0.1.0
LANGUAGES C CXX

2
Meta/CMake/vcpkg/base-triplets/arm64-linux.cmake
View file

@ -2,4 +2,4 @@ set(VCPKG_CMAKE_SYSTEM_NAME Linux)
set(VCPKG_TARGET_ARCHITECTURE arm64)
set(VCPKG_CRT_LINKAGE dynamic)
include(${CMAKE_CURRENT_LIST_DIR}/../user-variables.cmake OPTIONAL)
include(${CMAKE_CURRENT_LIST_DIR}/base.cmake)

2
Meta/CMake/vcpkg/base-triplets/arm64-osx.cmake
View file

@ -3,4 +3,4 @@ set(VCPKG_TARGET_ARCHITECTURE arm64)
set(VCPKG_OSX_ARCHITECTURES arm64)
set(VCPKG_CRT_LINKAGE dynamic)
include(${CMAKE_CURRENT_LIST_DIR}/../user-variables.cmake OPTIONAL)
include(${CMAKE_CURRENT_LIST_DIR}/base.cmake)

2
Meta/CMake/vcpkg/base-triplets/base.cmake Normal file
View file

@ -0,0 +1,2 @@
include(${CMAKE_CURRENT_LIST_DIR}/../user-variables.cmake OPTIONAL)
include(${_VCPKG_INSTALLED_DIR}/../build-vcpkg-variables.cmake OPTIONAL)

2
Meta/CMake/vcpkg/base-triplets/x64-linux.cmake
View file

@ -2,4 +2,4 @@ set(VCPKG_CMAKE_SYSTEM_NAME Linux)
set(VCPKG_TARGET_ARCHITECTURE x64)
set(VCPKG_CRT_LINKAGE dynamic)
include(${CMAKE_CURRENT_LIST_DIR}/../user-variables.cmake OPTIONAL)
include(${CMAKE_CURRENT_LIST_DIR}/base.cmake)

2
Meta/CMake/vcpkg/base-triplets/x64-osx.cmake
View file

@ -3,4 +3,4 @@ set(VCPKG_TARGET_ARCHITECTURE x64)
set(VCPKG_OSX_ARCHITECTURES x86_64)
set(VCPKG_CRT_LINKAGE dynamic)
include(${CMAKE_CURRENT_LIST_DIR}/../user-variables.cmake OPTIONAL)
include(${CMAKE_CURRENT_LIST_DIR}/base.cmake)

11
Meta/CMake/vcpkg/generate_vcpkg_toolchain_variables.cmake Normal file
View file

@ -0,0 +1,11 @@
# The generated file here is read by vcpkg/base-triplets/base.cmake to ensure consistency between the project
# build and the vcpkg build.
set(EXTRA_VCPKG_VARIABLES "")
if (NOT "${CMAKE_C_COMPILER}" STREQUAL "")
string(APPEND EXTRA_VCPKG_VARIABLES "set(ENV{CC} ${CMAKE_C_COMPILER})\n")
endif()
if (NOT "${CMAKE_CXX_COMPILER}" STREQUAL "")
string(APPEND EXTRA_VCPKG_VARIABLES "set(ENV{CXX} ${CMAKE_CXX_COMPILER})\n")
endif()
file(WRITE "${CMAKE_CURRENT_BINARY_DIR}/build-vcpkg-variables.cmake" "${EXTRA_VCPKG_VARIABLES}")