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https://github.com/ghostty-org/ghostty.git
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f2e299fb46
Add a ghostty_vt_add_target() CMake function that lets downstream projects build libghostty-vt for a specific Zig target triple. The function encapsulates zig discovery, build-type-to-optimize mapping, the zig build invocation, and output path conventions so consumers do not need to duplicate any of that logic. It creates named IMPORTED targets (e.g. ghostty-vt-static-linux-amd64) that work alongside the existing native ghostty-vt and ghostty-vt-static targets. The build-type mapping is factored into a shared _GHOSTTY_ZIG_OPT_FLAG variable used by both the native build and the new function. The static library targets now propagate c++ as a link dependency on non-Windows platforms, fixing link failures when consumers use static linking with the default SIMD-enabled build. A new example/c-vt-cmake-cross/ demonstrates end-to-end cross- compilation using zig cc as the C compiler, auto-detecting a cross target based on the host OS.
75 lines
2.9 KiB
CMake
75 lines
2.9 KiB
CMake
# GhosttyZigCompiler.cmake — set up zig cc as a cross compiler
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#
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# Provides ghostty_zig_compiler() which configures zig cc / zig c++ as
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# the C/CXX compiler for a given Zig target triple. It creates small
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# wrapper scripts (shell on Unix, .cmd on Windows) and sets the
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# following CMake variables in the caller's scope:
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#
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# CMAKE_C_COMPILER, CMAKE_CXX_COMPILER,
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# CMAKE_C_COMPILER_FORCED, CMAKE_CXX_COMPILER_FORCED,
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# CMAKE_SYSTEM_NAME, CMAKE_EXECUTABLE_SUFFIX (Windows only)
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#
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# This file is self-contained with no dependencies on the ghostty
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# source tree. Copy it into your project and include it directly.
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# It cannot be consumed via FetchContent because it must run before
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# project(), but FetchContent_MakeAvailable triggers project()
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# internally.
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#
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# Must be called BEFORE project() — CMake reads the compiler variables
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# at project() time and won't re-detect after that.
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#
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# Usage:
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#
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# cmake_minimum_required(VERSION 3.19)
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#
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# include(cmake/GhosttyZigCompiler.cmake)
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# ghostty_zig_compiler(ZIG_TARGET x86_64-linux-gnu)
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#
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# project(myapp LANGUAGES C CXX)
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#
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# FetchContent_MakeAvailable(ghostty)
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# ghostty_vt_add_target(NAME linux-amd64 ZIG_TARGET x86_64-linux-gnu)
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# target_link_libraries(myapp PRIVATE ghostty-vt-static-linux-amd64)
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#
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# See example/c-vt-cmake-cross/ for a complete working example.
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include_guard(GLOBAL)
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function(ghostty_zig_compiler)
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cmake_parse_arguments(PARSE_ARGV 0 _GZC "" "ZIG_TARGET" "")
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if(NOT _GZC_ZIG_TARGET)
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message(FATAL_ERROR "ghostty_zig_compiler: ZIG_TARGET is required")
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endif()
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find_program(_GZC_ZIG zig REQUIRED)
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if(CMAKE_HOST_SYSTEM_NAME STREQUAL "Windows")
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set(_cc "${CMAKE_CURRENT_BINARY_DIR}/zig-cc.cmd")
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set(_cxx "${CMAKE_CURRENT_BINARY_DIR}/zig-cxx.cmd")
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file(WRITE "${_cc}" "@\"${_GZC_ZIG}\" cc -target ${_GZC_ZIG_TARGET} %*\n")
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file(WRITE "${_cxx}" "@\"${_GZC_ZIG}\" c++ -target ${_GZC_ZIG_TARGET} %*\n")
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else()
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set(_cc "${CMAKE_CURRENT_BINARY_DIR}/zig-cc")
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set(_cxx "${CMAKE_CURRENT_BINARY_DIR}/zig-c++")
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file(WRITE "${_cc}" "#!/bin/sh\nexec \"${_GZC_ZIG}\" cc -target ${_GZC_ZIG_TARGET} \"$@\"\n")
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file(WRITE "${_cxx}" "#!/bin/sh\nexec \"${_GZC_ZIG}\" c++ -target ${_GZC_ZIG_TARGET} \"$@\"\n")
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file(CHMOD "${_cc}" "${_cxx}"
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PERMISSIONS OWNER_READ OWNER_WRITE OWNER_EXECUTE)
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endif()
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set(CMAKE_C_COMPILER "${_cc}" PARENT_SCOPE)
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set(CMAKE_CXX_COMPILER "${_cxx}" PARENT_SCOPE)
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set(CMAKE_C_COMPILER_FORCED TRUE PARENT_SCOPE)
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set(CMAKE_CXX_COMPILER_FORCED TRUE PARENT_SCOPE)
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if(_GZC_ZIG_TARGET MATCHES "windows")
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set(CMAKE_SYSTEM_NAME Windows PARENT_SCOPE)
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set(CMAKE_EXECUTABLE_SUFFIX ".exe" PARENT_SCOPE)
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elseif(_GZC_ZIG_TARGET MATCHES "linux")
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set(CMAKE_SYSTEM_NAME Linux PARENT_SCOPE)
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elseif(_GZC_ZIG_TARGET MATCHES "darwin|macos")
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set(CMAKE_SYSTEM_NAME Darwin PARENT_SCOPE)
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endif()
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endfunction()
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