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Skip using int_util.c on UEFI targets #505

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10 changes: 9 additions & 1 deletion build.rs
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Original file line number Diff line number Diff line change
Expand Up @@ -201,7 +201,6 @@ mod c {
("__cmpdi2", "cmpdi2.c"),
("__ctzdi2", "ctzdi2.c"),
("__ctzsi2", "ctzsi2.c"),
("__int_util", "int_util.c"),
("__mulvdi3", "mulvdi3.c"),
("__mulvsi3", "mulvsi3.c"),
("__negdi2", "negdi2.c"),
Expand All @@ -216,6 +215,15 @@ mod c {
("__ucmpdi2", "ucmpdi2.c"),
]);

// UEFI is treated as a windows target when compiling with
// clang, and int_util.c includes stdlib.h for windows targets
// even though we are compiling with `-ffreestanding`. That
// header may not be present might be incompatible, so skip this
// file on UEFI targets.
if target_os != "uefi" {
sources.extend(&[("__int_util", "int_util.c")]);
}

if consider_float_intrinsics {
sources.extend(&[
("__divdc3", "divdc3.c"),
Expand Down