build: increase C thread stack size on linux (#23676)

* build: increase thread stack size when running alpine linux

* review feedback: force a stack size of 8M on all linux distribs

* fix missing extldflags

build/ci.go

@@ -260,6 +260,11 @@ func buildFlags(env build.Environment) (flags []string) {
 	if runtime.GOOS == "darwin" {
 		ld = append(ld, "-s")
 	}
+	// Enforce the stacksize to 8M, which is the case on most platforms apart from
+	// alpine Linux.
+	if runtime.GOOS == "linux" {
+		ld = append(ld, "-extldflags", "-Wl,-z,stack-size=0x800000")
+	}
 	if len(ld) > 0 {
 		flags = append(flags, "-ldflags", strings.Join(ld, " "))
 	}