sys/syz-extract: use -nostdinc on linux

This makes the build completely hermetic.

1 files changed, 11 insertions, 2 deletions

diff --git a/sys/syz-sysgen/sysgen.go b/sys/syz-sysgen/sysgen.go
index 654664af6..9e4f894cd 100644
--- a/sys/syz-sysgen/sysgen.go
+++ b/sys/syz-sysgen/sysgen.go
@@ -69,8 +69,8 @@ func main() {
 
 	data := &ExecutorData{}
 	for _, OS := range OSList {
-		top := ast.ParseGlob(filepath.Join("sys", OS, "*.txt"), nil)
-		if top == nil {
+		descriptions := ast.ParseGlob(filepath.Join("sys", OS, "*.txt"), nil)
+		if descriptions == nil {
 			os.Exit(1)
 		}
 		osutil.MkdirAll(filepath.Join("sys", OS, "gen"))
@@ -111,6 +111,15 @@ func main() {
 				if consts == nil {
 					return
 				}
+				top := descriptions
+				if OS == "linux" && job.Target.Arch == "arm" {
+					// Hack: KVM is not supported on ARM anymore.
+					// Note: syz-extract also ignores this file for arm.
+					top = descriptions.Filter(func(n ast.Node) bool {
+						pos, _, _ := n.Info()
+						return pos.File != "dev_kvm.txt"
+					})
+				}
 				if OS == "test" {
 					constInfo := compiler.ExtractConsts(top, job.Target, eh)
 					compiler.FabricateSyscallConsts(job.Target, constInfo, consts)