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Add no-pic debug flag to disable position independent code #11995

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Add no-pic debug flag to disable position independent code #11995

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7 changes: 6 additions & 1 deletion src/librustc/back/link.rs
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Original file line number Diff line number Diff line change
Expand Up @@ -121,6 +121,11 @@ pub mod write {
})
}

let pic_mode = match sess.no_pic() {
true => lib::llvm::RelocDynamicNoPic,
false => lib::llvm::RelocPIC
};

let OptLevel = match sess.opts.optimize {
session::No => lib::llvm::CodeGenLevelNone,
session::Less => lib::llvm::CodeGenLevelLess,
Expand All @@ -141,7 +146,7 @@ pub mod write {
llvm::LLVMRustCreateTargetMachine(
T, CPU, Features,
lib::llvm::CodeModelDefault,
lib::llvm::RelocPIC,
pic_mode,
OptLevel,
true,
use_softfp,
Expand Down
5 changes: 5 additions & 0 deletions src/librustc/driver/session.rs
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Original file line number Diff line number Diff line change
Expand Up @@ -60,6 +60,7 @@ debugging_opts!(
NO_VERIFY,
BORROWCK_STATS,
NO_LANDING_PADS,
NO_PIC,
DEBUG_LLVM,
COUNT_TYPE_SIZES,
META_STATS,
Expand Down Expand Up @@ -95,6 +96,7 @@ pub fn debugging_opts_map() -> ~[(&'static str, &'static str, u64)] {
("borrowck-stats", "gather borrowck statistics", BORROWCK_STATS),
("no-landing-pads", "omit landing pads for unwinding",
NO_LANDING_PADS),
("no-pic", "do not produce position independent code", NO_PIC),
("debug-llvm", "enable debug output from LLVM", DEBUG_LLVM),
("count-type-sizes", "count the sizes of aggregate types",
COUNT_TYPE_SIZES),
Expand Down Expand Up @@ -351,6 +353,9 @@ impl Session_ {
pub fn no_landing_pads(&self) -> bool {
self.debugging_opt(NO_LANDING_PADS)
}
pub fn no_pic(&self) -> bool {
self.debugging_opt(NO_PIC)
}

// DEPRECATED. This function results in a lot of allocations when they
// are not necessary.
Expand Down