Make improvements

- Let OpenMP be usable via cosmocc
- Let libunwind be usable via cosmocc
- Make X86_HAVE(AVXVNNI) work correctly
- Avoid using MAP_GROWSDOWN on qemu-aarch64
- Introduce in6addr_any and in6addr_loopback
- Have thread stacks use MAP_GROWSDOWN by default
- Ask OpenMP to not use filesystem to manage threads
- Make NI_MAXHOST and NI_MAXSERV available w/o _GNU_SOURCE

tool/cosmocc/package.sh

@@ -129,9 +129,11 @@ for arch in $AMD64 $ARM64; do
   cp -f o/$arch/libc/crt/crt.o "$OUTDIR/$arch-linux-cosmo/lib/"
   cp -f o/$arch/cosmopolitan.a "$OUTDIR/$arch-linux-cosmo/lib/libcosmo.a"
   cp -f o/$arch/third_party/libcxx/libcxx.a "$OUTDIR/$arch-linux-cosmo/lib/"
-  for lib in c dl gcc_s m pthread resolv rt dl z stdc++; do
+  for lib in c dl gcc_s m pthread resolv rt dl unwind gomp stdc++; do
     printf '\041\074\141\162\143\150\076\012' >"$OUTDIR/$arch-linux-cosmo/lib/lib$lib.a"
   done
+  mkdir -p "$OUTDIR/lib/gcc/"
+  touch "$OUTDIR/lib/gcc/libgomp.spec"  # needed if user passes -fopenmp but not -lgomp
 done
 cp -f o/$AMD64/ape/ape.o "$OUTDIR/x86_64-linux-cosmo/lib/"
 cp -f o/$AMD64/ape/ape.lds "$OUTDIR/x86_64-linux-cosmo/lib/"

tool/emacs/cosmo-cpp-constants.el

@@ -59,7 +59,8 @@
     "__AVX512VBMI__"
     "__AVX512VNNI__"
     "__AVXVNNI__"
-    "__AVXVNNI__"
+    "__AVXVNNIINT8__"
+    "__AVXVNNIINT16__"
     "__ABM__"
     "__BMI__"
     "__BMI2__"

tool/viz/cpuid.c

@@ -175,6 +175,8 @@ int main(int argc, char *argv[]) {
              : "");
 
   CANIUSE(AVXVNNI);
+  CANIUSE(AVXVNNIINT8);
+  CANIUSE(AVXVNNIINT16);
   CANIUSE(AVX512BW);
   CANIUSE(AVX512CD);
   CANIUSE(AVX512DQ);