Make improvements

- Fix unused local variable errors
- Remove yoinks from sigaction() header
- Add nox87 and aarch64 to github actions
- Fix cosmocc -fportcosmo in linking mode
- It's now possible to build `make m=llvm o/llvm/libc`

tool/build/compile.c

@@ -227,6 +227,7 @@ const char *const kGccOnlyFlags[] = {
     "-fcx-limited-range",
     "-fdelete-dead-exceptions",
     "-femit-struct-debug-baseonly",
+    "-ffp-int-builtin-inexact",
     "-fipa-pta",
     "-fivopts",
     "-flimit-function-alignment",
@@ -236,6 +237,7 @@ const char *const kGccOnlyFlags[] = {
     "-fno-align-jumps",
     "-fno-align-labels",
     "-fno-align-loops",
+    "-fno-cx-limited-range",
     "-fno-fp-int-builtin-inexact",
     "-fno-gnu-unique",
     "-fno-gnu-unique",
@@ -1155,11 +1157,13 @@ int main(int argc, char *argv[]) {
     } else if (_startswith(argv[i], "-fsanitize=implicit") &&
                strstr(argv[i], "integer")) {
       if (isgcc) AddArg(argv[i]);
+    } else if (strstr(argv[i], "stack-protector")) {
+      if (isclang || (isgcc && ccversion >= 6)) {
+        AddArg(argv[i]);
+      }
     } else if (_startswith(argv[i], "-fvect-cost") ||
                _startswith(argv[i], "-mstringop") ||
-               _startswith(argv[i], "-gz") ||
-               strstr(argv[i], "stack-protector") ||
-               strstr(argv[i], "sanitize") ||
+               _startswith(argv[i], "-gz") || strstr(argv[i], "sanitize") ||
                _startswith(argv[i], "-fvect-cost") ||
                _startswith(argv[i], "-fvect-cost")) {
       if (isgcc && ccversion >= 6) {

tool/emacs/cosmo-c-builtins.el

@@ -163,7 +163,8 @@
            "__sync_lock_release"))
 
         (gcc-builtin-functions-ia32
-         '("__builtin_ia32_pmovmskb128"))
+         '("__builtin_ia32_pmovmskb128"
+           "__builtin_ia32_pmovmskb256"))
 
         (gxx-builtin-type-traits
          '("__has_nothrow_assign"

tool/scripts/cosmoc++

@@ -183,7 +183,7 @@ if [ $INTENT = cpp ]; then
 elif [ $INTENT = cc ]; then
   set -- $PLATFORM $PREDEF $CCFLAGS $CXXFLAGS $CPPFLAGS "$@" $FRAME
 else
-  set -- $PLATFORM $PREDEF $LDFLAGS $APEFLAGS $CXXFLAGS $CPPFLAGS "$@" \
+  set -- $PLATFORM $PREDEF $CCFLAGS $CXXFLAGS $CPPFLAGS $LDFLAGS $APEFLAGS $CXXFLAGS $CPPFLAGS "$@" \
          $LDLIBS -Wl,-z,common-page-size=4096 -Wl,-z,max-page-size=4096 $FRAME
 fi
 

tool/scripts/cosmocc

@@ -181,7 +181,7 @@ if [ $INTENT = cpp ]; then
 elif [ $INTENT = cc ]; then
   set -- $PLATFORM $PREDEF $CCFLAGS $CFLAGS $CPPFLAGS "$@" $FRAME
 else
-  set -- $PLATFORM $PREDEF $LDFLAGS $APEFLAGS $CFLAGS $CPPFLAGS "$@" \
+  set -- $PLATFORM $PREDEF $CCFLAGS $CFLAGS $CPPFLAGS $LDFLAGS $APEFLAGS $CFLAGS $CPPFLAGS "$@" \
          $LDLIBS -Wl,-z,common-page-size=4096 -Wl,-z,max-page-size=4096 $FRAME
 fi
 

tool/viz/memzoom.c

@@ -26,6 +26,7 @@
 #include "libc/calls/struct/winsize.h"
 #include "libc/calls/termios.h"
 #include "libc/calls/ucontext.h"
+#include "libc/dce.h"
 #include "libc/errno.h"
 #include "libc/fmt/conv.h"
 #include "libc/fmt/itoa.h"