make builds mutually exclusive

Author: Ryan Clanton

Cargo.toml

@@ -19,7 +19,7 @@ members = ["snmalloc-sys" ]
 snmalloc-sys = {version = "0.2.25", path = "snmalloc-sys",default-features = false }
 
 [features]
-default = ["1mib"]
+default = ["snmalloc-sys/build_cmake","1mib"]
 build_cc = ["snmalloc-sys/build_cc","1mib"]
 1mib = ["snmalloc-sys/1mib"]
 16mib = ["snmalloc-sys/16mib"]

snmalloc-sys/Cargo.toml

@@ -22,8 +22,9 @@ version = "0.2"
 default-features = false
 
 [features]
-default = ["1mib","cmake"]
+default = ["1mib","build_cmake"]
 build_cc = ["cc"]
+build_cmake = ["cmake"]
 1mib = []
 16mib = []
 qemu = []