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build.zig
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build.zig
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// THIS MATERIAL IS PROVIDED AS IS, WITH ABSOLUTELY NO WARRANTY EXPRESSED
// OR IMPLIED. ANY USE IS AT YOUR OWN RISK.
//
// Permission is hereby granted to use or copy this program
// for any purpose, provided the above notices are retained on all copies.
// Permission to modify the code and to distribute modified code is granted,
// provided the above notices are retained, and a notice that the code was
// modified is included with the above copyright notice.
// A script to build and test the collector using Zig build system.
// The script matches CMakeLists.txt as much as possible.
const builtin = @import("builtin");
const std = @import("std");
const zig_min_required_version = "0.12.0";
// TODO: specify PACKAGE_VERSION and LIB*_VER_INFO.
// Compared to the CMake script, some definitions and compiler options
// are hard-coded here, which is natural because build.zig is only built with
// the Zig build system and Zig ships with an embedded clang (as of zig 0.12).
// As a consequence, we do not have to support lots of different compilers
// (a notable exception is msvc target which implies use of the corresponding
// native compiler).
// And, on the contrary, we know exactly what we get and thus we can align on
// clang's capabilities rather than having to discover compiler capabilities.
// Similarly, since Zig ships libc headers for many platforms, we can, with
// the knowledge of the platform, determine what capabilities should be
// enabled or not.
comptime {
const required_ver = std.SemanticVersion.parse(zig_min_required_version)
catch unreachable;
if (builtin.zig_version.order(required_ver) == .lt) {
@compileError(std.fmt.comptimePrint(
"Zig version {} does not meet the build requirement of {}",
.{ builtin.zig_version, required_ver },
));
}
}
pub fn build(b: *std.Build) void {
const optimize = b.standardOptimizeOption(.{});
const target = b.standardTargetOptions(.{});
const t = target.result;
const default_enable_threads = !t.isWasm(); // both emscripten and wasi
// Customize build by passing "-D<option_name>[=false]" in command line.
const enable_cplusplus = b.option(bool, "enable_cplusplus",
"C++ support") orelse false;
const build_shared_libs = b.option(bool, "BUILD_SHARED_LIBS",
"Build shared libraries (otherwise static ones)") orelse true;
const build_cord = b.option(bool, "build_cord",
"Build cord library") orelse true;
const cflags_extra = b.option([]const u8, "CFLAGS_EXTRA",
"Extra user-defined cflags") orelse "";
// TODO: support enable_docs
const enable_threads = b.option(bool, "enable_threads",
"Support threads") orelse default_enable_threads;
const enable_parallel_mark = b.option(bool, "enable_parallel_mark",
"Parallelize marking and free list construction") orelse true;
const enable_thread_local_alloc = b.option(bool,
"enable_thread_local_alloc",
"Turn on thread-local allocation optimization") orelse true;
const enable_threads_discovery = b.option(bool,
"enable_threads_discovery",
"Enable threads discovery in GC") orelse true;
const enable_rwlock = b.option(bool, "enable_rwlock",
"Enable reader mode of the allocator lock") orelse false;
const enable_throw_bad_alloc_library = b.option(bool,
"enable_throw_bad_alloc_library",
"Turn on C++ gctba library build") orelse true;
const enable_gcj_support = b.option(bool, "enable_gcj_support",
"Support for gcj") orelse true;
const enable_sigrt_signals = b.option(bool, "enable_sigrt_signals",
"Use SIGRTMIN-based signals for thread suspend/resume") orelse false;
const enable_valgrind_tracking = b.option(bool,
"enable_valgrind_tracking",
"Support tracking GC_malloc and friends for heap profiling tools")
orelse false;
const enable_gc_debug = b.option(bool, "enable_gc_debug",
"Support for pointer back-tracing") orelse false;
const disable_gc_debug = b.option(bool, "disable_gc_debug",
"Disable debugging like GC_dump and its callees") orelse false;
const enable_java_finalization = b.option(bool,
"enable_java_finalization",
"Support for java finalization") orelse true;
const enable_atomic_uncollectable = b.option(bool,
"enable_atomic_uncollectable",
"Support for atomic uncollectible allocation") orelse true;
const enable_redirect_malloc = b.option(bool, "enable_redirect_malloc",
"Redirect malloc and friend to GC routines") orelse false;
const enable_disclaim = b.option(bool, "enable_disclaim",
"Support alternative finalization interface") orelse true;
const enable_dynamic_pointer_mask = b.option(bool,
"enable_dynamic_pointer_mask",
"Support pointer mask/shift set at runtime") orelse false;
const enable_large_config = b.option(bool, "enable_large_config",
"Optimize for large heap or root set") orelse false;
const enable_gc_assertions = b.option(bool, "enable_gc_assertions",
"Enable collector-internal assertion checking") orelse false;
const enable_mmap = b.option(bool, "enable_mmap",
"Use mmap instead of sbrk to expand the heap") orelse false;
const enable_munmap = b.option(bool, "enable_munmap",
"Return page to the OS if empty for N collections") orelse true;
const enable_dynamic_loading = b.option(bool, "enable_dynamic_loading",
"Enable tracing of dynamic library data roots") orelse true;
const enable_register_main_static_data = b.option(bool,
"enable_register_main_static_data",
"Perform the initial guess of data root sets") orelse true;
const enable_checksums = b.option(bool, "enable_checksums",
"Report erroneously cleared dirty bits") orelse false;
const enable_werror = b.option(bool, "enable_werror",
"Pass -Werror to the C compiler (treat warnings as errors)")
orelse false;
const enable_single_obj_compilation = b.option(bool,
"enable_single_obj_compilation",
"Compile all libgc source files into single .o") orelse false;
const disable_single_obj_compilation = b.option(bool,
"disable_single_obj_compilation",
"Compile each libgc source file independently") orelse false;
const enable_handle_fork = b.option(bool, "enable_handle_fork",
"Attempt to ensure a usable collector after fork()") orelse true;
const disable_handle_fork = b.option(bool, "disable_handle_fork",
"Prohibit installation of pthread_atfork() handlers") orelse false;
// TODO: support enable_emscripten_asyncify
const install_headers = b.option(bool, "install_headers",
"Install header and pkg-config metadata files") orelse true;
// TODO: support with_libatomic_ops, without_libatomic_ops
var gc = b.addStaticLibrary(.{
.name = "gc",
.target = target,
.optimize = optimize,
});
if (build_shared_libs) {
// TODO: convert VER_INFO values to [SO]VERSION ones
gc = b.addSharedLibrary(.{
.name = "gc",
.target = target,
.optimize = optimize,
});
}
var source_files = std.ArrayList([]const u8).init(b.allocator);
defer source_files.deinit();
var flags = std.ArrayList([]const u8).init(b.allocator);
defer flags.deinit();
// Always enabled.
flags.append("-D ALL_INTERIOR_POINTERS") catch unreachable;
flags.append("-D NO_EXECUTE_PERMISSION") catch unreachable;
// Output all warnings.
flags.appendSlice(&.{
"-Wall",
"-Wextra",
"-Wpedantic",
}) catch unreachable;
// Disable MS crt security warnings reported e.g. for getenv, strcpy.
if (t.abi == .msvc) {
flags.append("-D _CRT_SECURE_NO_DEPRECATE") catch unreachable;
}
source_files.appendSlice(&.{
"allchblk.c",
"alloc.c",
"blacklst.c",
"dbg_mlc.c",
"dyn_load.c",
"finalize.c",
"headers.c",
"mach_dep.c",
"malloc.c",
"mallocx.c",
"mark.c",
"mark_rts.c",
"misc.c",
"new_hblk.c",
"obj_map.c",
"os_dep.c",
"ptr_chck.c",
"reclaim.c",
"typd_mlc.c",
}) catch unreachable;
if (enable_threads) {
flags.append("-D GC_THREADS") catch unreachable;
if (enable_parallel_mark) {
flags.append("-D PARALLEL_MARK") catch unreachable;
}
if (t.os.tag != .windows) { // assume pthreads
// TODO: support cygwin when supported by zig
// Zig comes with clang which supports GCC atomic intrinsics.
flags.append("-D GC_BUILTIN_ATOMIC") catch unreachable;
// TODO: define and use THREADDLLIBS_LIST
source_files.appendSlice(&.{
"gc_dlopen.c",
"pthread_start.c",
"pthread_support.c",
}) catch unreachable;
if (t.isDarwin()) {
source_files.append("darwin_stop_world.c") catch unreachable;
} else {
source_files.append("pthread_stop_world.c") catch unreachable;
}
// Common defines for POSIX platforms.
flags.append("-D _REENTRANT") catch unreachable;
// TODO: some targets might need _PTHREADS defined too.
if (enable_thread_local_alloc) {
flags.append("-D THREAD_LOCAL_ALLOC") catch unreachable;
source_files.appendSlice(&.{
"specific.c",
"thread_local_alloc.c",
}) catch unreachable;
}
// Message for clients: Explicit GC_INIT() calls may be required.
if (enable_handle_fork and !disable_handle_fork) {
flags.append("-D HANDLE_FORK") catch unreachable;
}
if (enable_sigrt_signals) {
flags.append("-D GC_USESIGRT_SIGNALS") catch unreachable;
}
} else {
// Assume the GCC atomic intrinsics are supported.
flags.append("-D GC_BUILTIN_ATOMIC") catch unreachable;
if (enable_thread_local_alloc
and (enable_parallel_mark or !build_shared_libs)) {
// Imply THREAD_LOCAL_ALLOC unless GC_DLL.
flags.append("-D THREAD_LOCAL_ALLOC") catch unreachable;
source_files.append("thread_local_alloc.c") catch unreachable;
}
flags.append("-D EMPTY_GETENV_RESULTS") catch unreachable;
source_files.appendSlice(&.{
"pthread_start.c", // just if client defines GC_WIN32_PTHREADS
"pthread_support.c",
"win32_threads.c",
}) catch unreachable;
}
}
// TODO: define/use NEED_LIB_RT
if (disable_handle_fork) {
flags.append("-D NO_HANDLE_FORK") catch unreachable;
}
if (enable_gcj_support) {
flags.append("-D GC_GCJ_SUPPORT") catch unreachable;
// TODO: do not define GC_ENABLE_SUSPEND_THREAD on kFreeBSD
// if enable_thread_local_alloc (a workaround for some bug).
flags.append("-D GC_ENABLE_SUSPEND_THREAD") catch unreachable;
source_files.append("gcj_mlc.c") catch unreachable;
}
if (enable_disclaim) {
flags.append("-D ENABLE_DISCLAIM") catch unreachable;
source_files.append("fnlz_mlc.c") catch unreachable;
}
if (enable_dynamic_pointer_mask) {
flags.append("-D DYNAMIC_POINTER_MASK") catch unreachable;
}
if (enable_java_finalization) {
flags.append("-D JAVA_FINALIZATION") catch unreachable;
}
if (enable_atomic_uncollectable) {
flags.append("-D GC_ATOMIC_UNCOLLECTABLE") catch unreachable;
}
if (enable_valgrind_tracking) {
flags.append("-D VALGRIND_TRACKING") catch unreachable;
}
if (enable_gc_debug) {
flags.append("-D DBG_HDRS_ALL") catch unreachable;
flags.append("-D KEEP_BACK_PTRS") catch unreachable;
if (t.os.tag == .linux) {
flags.append("-D MAKE_BACK_GRAPH") catch unreachable;
// TODO: do not define SAVE_CALL_COUNT for e2k
flags.append("-D SAVE_CALL_COUNT=8") catch unreachable;
source_files.append("backgraph.c") catch unreachable;
}
}
if (disable_gc_debug) {
flags.append("-D NO_DEBUGGING") catch unreachable;
}
if (optimize != .Debug) {
flags.append("-D NDEBUG") catch unreachable;
}
if (enable_redirect_malloc) {
if (enable_gc_debug) {
flags.append("-D REDIRECT_MALLOC=GC_debug_malloc_replacement")
catch unreachable;
flags.append("-D REDIRECT_REALLOC=GC_debug_realloc_replacement")
catch unreachable;
flags.append("-D REDIRECT_FREE=GC_debug_free") catch unreachable;
} else {
flags.append("-D REDIRECT_MALLOC=GC_malloc") catch unreachable;
}
if (t.os.tag == .windows) {
flags.append("-D REDIRECT_MALLOC_IN_HEADER") catch unreachable;
} else {
flags.append("-D GC_USE_DLOPEN_WRAP") catch unreachable;
}
}
if (enable_mmap or enable_munmap) {
flags.append("-D USE_MMAP") catch unreachable;
}
if (enable_munmap) {
flags.append("-D USE_MUNMAP") catch unreachable;
}
if (!enable_dynamic_loading) {
flags.append("-D IGNORE_DDYNAMIC_LOADING") catch unreachable;
}
if (!enable_register_main_static_data) {
flags.append("-D GC_DONT_REGISTER_MAIN_STATIC_DATA") catch unreachable;
}
if (enable_large_config) {
flags.append("-D LARGE_CONFIG") catch unreachable;
}
if (enable_gc_assertions) {
flags.append("-D GC_ASSERTIONS") catch unreachable;
}
if (!enable_threads_discovery) {
flags.append("-D GC_NO_THREADS_DISCOVERY") catch unreachable;
}
if (enable_rwlock) {
flags.append("-D USE_RWLOCK") catch unreachable;
}
if (enable_checksums) {
if (enable_munmap or enable_threads) {
@panic("CHECKSUMS not compatible with USE_MUNMAP or threads");
}
flags.append("-D CHECKSUMS") catch unreachable;
source_files.append("checksums.c") catch unreachable;
}
if (enable_werror) {
flags.append("-Werror") catch unreachable;
}
if (enable_single_obj_compilation
or (build_shared_libs and !disable_single_obj_compilation)) {
source_files.clearAndFree();
source_files.append("extra/gc.c") catch unreachable;
if (enable_threads and !t.isDarwin() and t.os.tag != .windows) {
flags.append("-D GC_PTHREAD_START_STANDALONE") catch unreachable;
source_files.append("pthread_start.c") catch unreachable;
}
}
// Add implementation of backtrace() and backtrace_symbols().
if (t.abi == .msvc) {
source_files.append("extra/msvc_dbg.c") catch unreachable;
}
// TODO: declare that the libraries do not refer to external symbols
// of build_shared_libs.
// zig cc supports these flags.
flags.appendSlice(&.{
// TODO: -Wno-unused-command-line-argument
// Prevent "__builtin_return_address with nonzero argument is unsafe".
"-Wno-frame-address",
"-fno-strict-aliasing",
}) catch unreachable;
if (build_shared_libs) {
flags.append("-D GC_DLL") catch unreachable;
if (t.abi == .msvc) {
// TODO: depend on user32.lib instead
flags.append("-D DONT_USE_USER32_DLL") catch unreachable;
} else {
// zig cc supports these flags.
flags.append("-D GC_VISIBILITY_HIDDEN_SET") catch unreachable;
flags.append("-fvisibility=hidden") catch unreachable;
}
} else {
flags.append("-D GC_NOT_DLL") catch unreachable;
if (t.os.tag == .windows) {
// Do not require the clients to link with "user32" system library.
flags.append("-D DONT_USE_USER32_DLL") catch unreachable;
}
}
// Note: Zig uses clang which ships with these so, unless another
// sysroot/libc, etc. headers location is pointed out, it is fine to
// hard-code enable this.
// -U GC_MISSING_EXECINFO_H
// -U GC_NO_SIGSETJMP
flags.append("-D HAVE_SYS_TYPES_H") catch unreachable;
if (t.abi == .msvc) {
// To workaround "extension used" error reported for __try/finally.
flags.append("-D NO_SEH_AVAILABLE") catch unreachable;
} else {
flags.append("-D HAVE_UNISTD_H") catch unreachable;
}
const have_getcontext = !t.abi.isMusl() and t.os.tag != .windows;
if (!have_getcontext) {
flags.append("-D NO_GETCONTEXT") catch unreachable;
}
if (!t.isDarwin() and t.os.tag != .windows) {
// dl_iterate_phdr exists (as a strong symbol).
flags.append("-D HAVE_DL_ITERATE_PHDR") catch unreachable;
if (enable_threads) {
// pthread_sigmask() and sigset_t are available and needed.
flags.append("-D HAVE_PTHREAD_SIGMASK") catch unreachable;
}
}
// Build with GC_wcsdup() support (wcslen is available).
flags.append("-D GC_REQUIRE_WCSDUP") catch unreachable;
// pthread_setname_np, if available, may have 1, 2 or 3 arguments.
if (t.isDarwin()) {
flags.append("-D HAVE_PTHREAD_SETNAME_NP_WITHOUT_TID")
catch unreachable;
} else if (t.os.tag == .linux) {
flags.append("-D HAVE_PTHREAD_SETNAME_NP_WITH_TID") catch unreachable;
} else {
// TODO: support HAVE_PTHREAD_SETNAME_NP_WITH_TID_AND_ARG
// and HAVE_PTHREAD_SET_NAME_NP targets.
}
if (t.os.tag != .windows) {
// Define to use 'dladdr' function (used for debugging).
flags.append("-D HAVE_DLADDR") catch unreachable;
}
// TODO: as of zig 0.12, exception.h and getsect.h are not provided
// by zig itself for Darwin target.
if (t.isDarwin() and !target.query.isNative()) {
flags.append("-D MISSING_MACH_O_GETSECT_H") catch unreachable;
flags.append("-D NO_MPROTECT_VDB") catch unreachable;
}
if (enable_cplusplus and enable_werror) {
if (build_shared_libs and t.os.tag == .windows or t.abi == .msvc) {
// Avoid "replacement operator new[] cannot be declared inline"
// warnings.
flags.append("-Wno-inline-new-delete") catch unreachable;
}
if (t.abi == .msvc) {
// TODO: as of zig 0.12,
// "argument unused during compilation: -nostdinc++" warning is
// reported if using MS compiler.
flags.append("-Wno-unused-command-line-argument")
catch unreachable;
}
}
if (build_cord and enable_werror and !enable_threads
and (t.abi == .gnueabi or t.abi == .gnueabihf or t.abi == .musleabi
or t.abi == .musleabihf)) {
// TODO: as of zig 0.12, if GCC built-in atomic intrinsic is used,
// "large atomic operation may incur significant performance penalty"
// warning is reported for 32-bit arm targets.
flags.append("-D AO_DISABLE_GCC_ATOMICS") catch unreachable;
}
// Extra user-defined flags (if any) to pass to the compiler.
if (cflags_extra.len > 0) {
// Split it up on a space and append each part to flags separately.
var tokenizer = std.mem.tokenizeScalar(u8, cflags_extra, ' ');
while (tokenizer.next()) |token| {
flags.append(token) catch unreachable;
}
}
gc.addCSourceFiles(.{
.files = source_files.items,
.flags = flags.items,
});
gc.addIncludePath(b.path("include"));
gc.linkLibC();
var gccpp = b.addStaticLibrary(.{
.name = "gccpp",
.target = target,
.optimize = optimize,
});
var gctba = b.addStaticLibrary(.{
.name = "gctba",
.target = target,
.optimize = optimize,
});
if (enable_cplusplus) {
if (build_shared_libs) {
gccpp = b.addSharedLibrary(.{
.name = "gccpp",
.target = target,
.optimize = optimize,
});
}
var gccpp_src_files = std.ArrayList([]const u8).init(b.allocator);
defer gccpp_src_files.deinit();
gccpp_src_files.appendSlice(&.{
"gc_badalc.cc",
"gc_cpp.cc",
}) catch unreachable;
gccpp.addCSourceFiles(.{
.files = gccpp_src_files.items,
.flags = flags.items,
});
gccpp.addIncludePath(b.path("include"));
gccpp.linkLibrary(gc);
linkLibCpp(gccpp);
if (enable_throw_bad_alloc_library) {
// The same as gccpp but contains only gc_badalc.
if (build_shared_libs) {
gctba = b.addSharedLibrary(.{
.name = "gctba",
.target = target,
.optimize = optimize,
});
}
var gctba_src_files = std.ArrayList([]const u8).init(b.allocator);
defer gctba_src_files.deinit();
gctba_src_files.append("gc_badalc.cc") catch unreachable;
gctba.addCSourceFiles(.{
.files = gctba_src_files.items,
.flags = flags.items,
});
gctba.addIncludePath(b.path("include"));
gctba.linkLibrary(gc);
linkLibCpp(gctba);
}
}
var cord = b.addStaticLibrary(.{
.name = "cord",
.target = target,
.optimize = optimize,
});
if (build_cord) {
if (build_shared_libs) {
cord = b.addSharedLibrary(.{
.name = "cord",
.target = target,
.optimize = optimize,
});
}
var cord_src_files = std.ArrayList([]const u8).init(b.allocator);
defer cord_src_files.deinit();
cord_src_files.appendSlice(&.{
"cord/cordbscs.c",
"cord/cordprnt.c",
"cord/cordxtra.c",
}) catch unreachable;
cord.addCSourceFiles(.{
.files = cord_src_files.items,
.flags = flags.items,
});
cord.addIncludePath(b.path("include"));
cord.linkLibrary(gc);
cord.linkLibC();
}
if (install_headers) {
installHeader(b, gc, "gc.h");
installHeader(b, gc, "gc/gc.h");
installHeader(b, gc, "gc/gc_backptr.h");
installHeader(b, gc, "gc/gc_config_macros.h");
installHeader(b, gc, "gc/gc_inline.h");
installHeader(b, gc, "gc/gc_mark.h");
installHeader(b, gc, "gc/gc_tiny_fl.h");
installHeader(b, gc, "gc/gc_typed.h");
installHeader(b, gc, "gc/gc_version.h");
installHeader(b, gc, "gc/javaxfc.h");
installHeader(b, gc, "gc/leak_detector.h");
if (enable_cplusplus) {
installHeader(b, gccpp, "gc_cpp.h");
installHeader(b, gccpp, "gc/gc_allocator.h");
installHeader(b, gccpp, "gc/gc_cpp.h");
if (enable_throw_bad_alloc_library) {
// The same headers as gccpp library has.
installHeader(b, gctba, "gc_cpp.h");
installHeader(b, gctba, "gc/gc_allocator.h");
installHeader(b, gctba, "gc/gc_cpp.h");
}
}
if (enable_disclaim) {
installHeader(b, gc, "gc/gc_disclaim.h");
}
if (enable_gcj_support) {
installHeader(b, gc, "gc/gc_gcj.h");
}
if (enable_threads and t.os.tag != .windows) {
installHeader(b, gc, "gc/gc_pthread_redirects.h");
}
if (build_cord) {
installHeader(b, cord, "gc/cord.h");
installHeader(b, cord, "gc/cord_pos.h");
installHeader(b, cord, "gc/ec.h");
}
// TODO: compose and install bdw-gc.pc and pkgconfig.
}
b.installArtifact(gc);
if (enable_cplusplus) {
b.installArtifact(gccpp);
if (enable_throw_bad_alloc_library) {
b.installArtifact(gctba);
}
}
if (build_cord) {
b.installArtifact(cord);
}
// Note: there is no "build_tests" option, as the tests are built
// only if "test" step is requested.
const test_step = b.step("test", "Run tests");
addTest(b, gc, test_step, flags, "gctest", "tests/gctest.c");
if (build_cord) {
addTestExt(b, gc, cord, test_step, flags,
"cordtest", "cord/tests/cordtest.c");
// TODO: add de test (Windows only)
}
addTest(b, gc, test_step, flags, "hugetest", "tests/huge.c");
addTest(b, gc, test_step, flags, "leaktest", "tests/leak.c");
addTest(b, gc, test_step, flags, "middletest", "tests/middle.c");
addTest(b, gc, test_step, flags, "realloctest", "tests/realloc.c");
addTest(b, gc, test_step, flags, "smashtest", "tests/smash.c");
// TODO: add staticroots test
if (enable_gc_debug) {
addTest(b, gc, test_step, flags, "tracetest", "tests/trace.c");
}
if (enable_threads) {
addTest(b, gc, test_step, flags, "atomicopstest", "tests/atomicops.c");
addTest(b, gc, test_step, flags,
"initfromthreadtest", "tests/initfromthread.c");
addTest(b, gc, test_step, flags,
"subthreadcreatetest", "tests/subthreadcreate.c");
addTest(b, gc, test_step, flags,
"threadleaktest", "tests/threadleak.c");
if (t.os.tag != .windows) {
addTest(b, gc, test_step, flags,
"threadkeytest", "tests/threadkey.c");
}
}
if (enable_cplusplus) {
addTestExt(b, gc, gccpp, test_step, flags,
"cpptest", "tests/cpp.cc");
}
if (enable_disclaim) {
addTest(b, gc, test_step, flags,
"disclaim_bench", "tests/disclaim_bench.c");
addTest(b, gc, test_step, flags, "disclaimtest", "tests/disclaim.c");
addTest(b, gc, test_step, flags, "weakmaptest", "tests/weakmap.c");
}
}
fn linkLibCpp(lib: *std.Build.Step.Compile) void {
const t = lib.rootModuleTarget();
if (t.abi == .msvc) {
// TODO: as of zig 0.12, "unable to build libcxxabi" warning is
// reported if linking C++ code using MS compiler.
lib.linkLibC();
} else {
lib.linkLibCpp();
}
}
fn addTest(b: *std.Build, gc: *std.Build.Step.Compile,
test_step: *std.Build.Step, flags: std.ArrayList([]const u8),
testname: []const u8, filename: []const u8) void {
addTestExt(b, gc, null, test_step, flags, testname, filename);
}
fn addTestExt(b: *std.Build, gc: *std.Build.Step.Compile,
lib2: ?*std.Build.Step.Compile, test_step: *std.Build.Step,
flags: std.ArrayList([]const u8), testname: []const u8,
filename: []const u8) void {
const test_exe = b.addExecutable(.{
.name = testname,
.optimize = gc.root_module.optimize.?,
.target = gc.root_module.resolved_target.?
});
test_exe.addCSourceFile(.{
.file = b.path(filename),
.flags = flags.items
});
test_exe.addIncludePath(b.path("include"));
test_exe.linkLibrary(gc);
if (lib2 != null) {
test_exe.linkLibrary(lib2.?);
}
test_exe.linkLibC();
const run_test_exe = b.addRunArtifact(test_exe);
test_step.dependOn(&run_test_exe.step);
}
fn installHeader(b: *std.Build, lib: *std.Build.Step.Compile,
hfile: []const u8) void {
const src_path = b.pathJoin(&.{ "include", hfile });
lib.installHeader(b.path(src_path), hfile);
}