authorgravatar for alex@alexrp.comAlex Rønne Petersen <alex@alexrp.com> 2025-07-13 22:58:54+02:00
committergravatar for alex@alexrp.comAlex Rønne Petersen <alex@alexrp.com> 2025-07-14 07:12:34+02:00
logc6a18e9534025bb84f2707b3d2bd7437f2168a7e
treee19ad8b63caf1b825a50fb6e80d9bc9cff91433e
parent5696bbb307effecc2bf6dd1b28f6954186558b94

libcxx: fix building for wasm32-wasi by disabling exceptions

I accidentally regressed this in the LLVM 20 upgrade. Closes #24437.

1 files changed, 11 insertions(+), 0 deletions(-)

src/libs/libcxx.zig+11
......@@ -211,6 +211,10 @@ pub fn buildLibCxx(comp: *Compilation, prog_node: std.Progress.Node) BuildError!
211211 try cflags.append("-DLIBCXX_BUILDING_LIBCXXABI");
212212 try cflags.append("-D_LIBCPP_HAS_NO_PRAGMA_SYSTEM_HEADER");
213213
214 if (target.os.tag == .wasi) {
215 try cflags.append("-fno-exceptions");
216 }
217
214218 try cflags.append("-fvisibility=hidden");
215219 try cflags.append("-fvisibility-inlines-hidden");
216220
......@@ -388,6 +392,9 @@ pub fn buildLibCxxAbi(comp: *Compilation, prog_node: std.Progress.Node) BuildErr
388392 for (libcxxabi_files) |cxxabi_src| {
389393 if (!comp.config.any_non_single_threaded and std.mem.startsWith(u8, cxxabi_src, "src/cxa_thread_atexit.cpp"))
390394 continue;
395 if (target.os.tag == .wasi and
396 (std.mem.eql(u8, cxxabi_src, "src/cxa_exception.cpp") or std.mem.eql(u8, cxxabi_src, "src/cxa_personality.cpp")))
397 continue;
391398
392399 var cflags = std.ArrayList([]const u8).init(arena);
393400
......@@ -403,6 +410,10 @@ pub fn buildLibCxxAbi(comp: *Compilation, prog_node: std.Progress.Node) BuildErr
403410 try cflags.append("-DHAVE___CXA_THREAD_ATEXIT_IMPL");
404411 }
405412
413 if (target.os.tag == .wasi) {
414 try cflags.append("-fno-exceptions");
415 }
416
406417 try cflags.append("-fvisibility=hidden");
407418 try cflags.append("-fvisibility-inlines-hidden");
408419