On Darwin targets, the build now automatically produces a universal
(arm64 + x86_64) XCFramework at lib/ghostty-vt.xcframework under
the install prefix. This bundles the fat static library with headers
so consumers using Xcode or Swift PM can link libghostty-vt directly.
The libghostty-vt pkg-config file was missing Libs.private, so
pkg-config --libs --static returned the same flags as the shared
case, omitting the C++ standard library needed by the SIMD code.
Additionally, the static archive did not bundle the vendored SIMD
dependencies (simdutf, highway, utfcpp), leaving consumers with
unresolved symbols when linking. If we're choosing to vendor (no -fsys)
then we should produce a fat static archive that includes them. If `-fsys`
is used, then we should not bundle them and instead reference them via
Requires.private, letting pkg-config chain to their own .pc files.
Add Libs.private with the C++ runtime (-lc++ on Darwin, -lstdc++
on Linux) and Requires.private for any SIMD deps provided via
system integration. When SIMD deps are vendored (the default),
produce a fat static archive that bundles them using libtool on
Darwin and ar on Linux. When they come from the system (-fsys=),
reference them via Requires.private instead, letting pkg-config
chain to their own .pc files.
When compiling C++ files, Zig unconditionally passes -nostdinc++ and,
if link_libcpp is set, adds its bundled libc++/libc++abi include paths
as replacements (see Compilation.zig). On MSVC targets this conflicts
with the MSVC C++ runtime headers (vcruntime_typeinfo.h,
vcruntime_exception.h, etc.), causing compilation failures in SIMD
C++ code.
The fix is to use linkLibC instead of linkLibCpp on MSVC. Zig always
passes -nostdinc to strip default search paths, but LibCDirs.detect
re-adds the MSVC SDK include directories, which contain both C and
C++ standard library headers. This gives us proper access to MSVC's
own <optional>, <iterator>, <cstddef>, etc. without the libc++
conflicts.
For the package builds (highway, simdutf, utfcpp) this means
switching from linkLibCpp to linkLibC on MSVC. For SharedDeps and
GhosttyZig, linkLibC is already called separately, so we just skip
linkLibCpp.
Zig's bundled libc++/libc++abi conflicts with the MSVC C++ runtime
headers (vcruntime_typeinfo.h, vcruntime_exception.h, etc.) when
targeting native-native-msvc. This caused compilation failures in
the SIMD C++ code due to -nostdinc++ suppressing MSVC headers and
libc++ types clashing with MSVC runtime types.
Skip linkLibCpp() for MSVC targets across all packages (highway,
simdutf, utfcpp) and the main build (SharedDeps, GhosttyZig) since
MSVC provides its own C++ standard library natively. Also add
missing <iterator> and <cstddef> includes that were previously
pulled in transitively through libc++ headers but are not
guaranteed by MSVC's headers.
Fixes various issues:
- C ABI detection was faulty, which caused some Zig programs to use
the C ABI mode and some C programs not to. Let's be explicit.
- Unit tests now tests C ABI mode.
- Build binary no longer rebuilds on any terminal change (a regression).
- Zig programs can choose to depend on the C ABI version of the terminal
lib by using the `ghostty-vt-c` module.
