Use ffi::c_char to fix arm64

Author: LegNeato

crates/ptx_compiler/src/lib.rs

@@ -1,6 +1,7 @@
 //! Raw and High level bindings to the CUDA NVPTX compiler used to compile PTX to
 //! cubin files.
 
+use std::ffi::c_char;
 use std::mem::MaybeUninit;
 
 use cust_raw::nvptx_compiler_sys;
@@ -101,8 +102,11 @@ impl CompilerFailure {
                 .to_result()?;
             let size = size.assume_init();
             let mut vec = Vec::with_capacity(size);
-            nvptx_compiler_sys::nvPTXCompilerGetErrorLog(self.handle, vec.as_mut_ptr() as *mut i8)
-                .to_result()?;
+            nvptx_compiler_sys::nvPTXCompilerGetErrorLog(
+                self.handle,
+                vec.as_mut_ptr() as *mut c_char,
+            )
+            .to_result()?;
             vec.set_len(size);
             Ok(String::from_utf8_lossy(&vec).to_string())
         }
@@ -134,8 +138,11 @@ impl CompiledProgram {
                 .to_result()?;
             let size = size.assume_init();
             let mut vec = Vec::with_capacity(size);
-            nvptx_compiler_sys::nvPTXCompilerGetInfoLog(self.handle, vec.as_mut_ptr() as *mut i8)
-                .to_result()?;
+            nvptx_compiler_sys::nvPTXCompilerGetInfoLog(
+                self.handle,
+                vec.as_mut_ptr() as *mut c_char,
+            )
+            .to_result()?;
             vec.set_len(size);
             Ok(String::from_utf8_lossy(&vec).to_string())
         }