05-no-backtrace.patch

--- native/numpy/core/setup_common.py	2022-09-09 06:36:30.443449000 -0700
+++ wasm/numpy/core/setup_common.py	2022-09-23 17:24:28.115837013 -0700
@@ -131,7 +131,14 @@
 
 OPTIONAL_LOCALE_FUNCS = ["strtold_l"]
 OPTIONAL_FILE_FUNCS = ["ftello", "fseeko", "fallocate"]
-OPTIONAL_MISC_FUNCS = ["backtrace", "madvise"]
+
+# On WASM the feature detection for backtrace doesn't work properly,
+# and I don't know any way to disable this via a command line flag,
+# so we change code here to not even look for backtrace. This is needed
+# with clang15 just to compile, since backtrace isn't declared.  Of course,
+# WASM can't possible provide backtraces, as that violates their security
+# model, so it's best to not build C code that thinks this is available.
+OPTIONAL_MISC_FUNCS = ["madvise"] # ["backtrace", "madvise"]
 
 
 OPTIONAL_HEADERS = [