disable duplicate symbols in builtins

Author: tgross35

build.rs

@@ -478,10 +478,6 @@ mod c {
                 ("__floatunsitf", "floatunsitf.c"),
                 ("__trunctfdf2", "trunctfdf2.c"),
                 ("__trunctfsf2", "trunctfsf2.c"),
-                ("__addtf3", "addtf3.c"),
-                ("__multf3", "multf3.c"),
-                ("__subtf3", "subtf3.c"),
-                ("__divtf3", "divtf3.c"),
                 ("__powitf2", "powitf2.c"),
                 ("__fe_getround", "fp_mode.c"),
                 ("__fe_raise_inexact", "fp_mode.c"),
@@ -500,15 +496,11 @@ mod c {
             sources.extend(&[
                 ("__extenddftf2", "extenddftf2.c"),
                 ("__netf2", "comparetf2.c"),
-                ("__addtf3", "addtf3.c"),
-                ("__multf3", "multf3.c"),
-                ("__subtf3", "subtf3.c"),
                 ("__fixtfsi", "fixtfsi.c"),
                 ("__floatsitf", "floatsitf.c"),
                 ("__fixunstfsi", "fixunstfsi.c"),
                 ("__floatunsitf", "floatunsitf.c"),
                 ("__fe_getround", "fp_mode.c"),
-                ("__divtf3", "divtf3.c"),
                 ("__trunctfdf2", "trunctfdf2.c"),
                 ("__trunctfsf2", "trunctfsf2.c"),
             ]);
@@ -518,15 +510,11 @@ mod c {
             sources.extend(&[
                 ("__extenddftf2", "extenddftf2.c"),
                 ("__netf2", "comparetf2.c"),
-                ("__addtf3", "addtf3.c"),
-                ("__multf3", "multf3.c"),
-                ("__subtf3", "subtf3.c"),
                 ("__fixtfsi", "fixtfsi.c"),
                 ("__floatsitf", "floatsitf.c"),
                 ("__fixunstfsi", "fixunstfsi.c"),
                 ("__floatunsitf", "floatunsitf.c"),
                 ("__fe_getround", "fp_mode.c"),
-                ("__divtf3", "divtf3.c"),
                 ("__trunctfdf2", "trunctfdf2.c"),
                 ("__trunctfsf2", "trunctfsf2.c"),
             ]);