Use reinterpret_cast as Linux wchar_t is char16

alinaliBQ · alinaliBQ · commit 126bbe7b3c38 · 2026-03-13T11:47:11.000-07:00
diff --git a/cpp/src/arrow/flight/sql/odbc/odbc_impl/system_dsn.cc b/cpp/src/arrow/flight/sql/odbc/odbc_impl/system_dsn.cc
@@ -48,7 +48,7 @@ void PostArrowUtilError(arrow::Status error_status) {
   std::wstring werror_msg = arrow::util::UTF8ToWideString(error_msg).ValueOr(
       L"Error during utf8 to wide string conversion");
 
-  PostError(ODBC_ERROR_GENERAL_ERR, const_cast<LPWSTR>(werror_msg.c_str()));
+  PostError(ODBC_ERROR_GENERAL_ERR, const_cast<LPWSTR>(GET_SQWCHAR_PTR(werror_msg)));
 }
 
 void PostLastInstallerError() {
@@ -70,7 +70,7 @@ void PostLastInstallerError() {
 #endif  // __linux__
   std::wstring error_msg = buf.str();
 
-  PostError(code, const_cast<LPWSTR>(error_msg.c_str()));
+  PostError(code, const_cast<LPWSTR>(GET_SQWCHAR_PTR(error_msg)));
 }
 
 /**

Original file line number	Diff line number	Diff line change
`@@ -48,7 +48,7 @@ void PostArrowUtilError(arrow::Status error_status) {`
`48`	`48`	`std::wstring werror_msg = arrow::util::UTF8ToWideString(error_msg).ValueOr(`
`49`	`49`	`L"Error during utf8 to wide string conversion");`
`50`	`50`
`51`		`- PostError(ODBC_ERROR_GENERAL_ERR, const_cast<LPWSTR>(werror_msg.c_str()));`
	`51`	`+ PostError(ODBC_ERROR_GENERAL_ERR, const_cast<LPWSTR>(GET_SQWCHAR_PTR(werror_msg)));`
`52`	`52`	`}`
`53`	`53`
`54`	`54`	`void PostLastInstallerError() {`
`@@ -70,7 +70,7 @@ void PostLastInstallerError() {`
`70`	`70`	`#endif // __linux__`
`71`	`71`	`std::wstring error_msg = buf.str();`
`72`	`72`
`73`		`- PostError(code, const_cast<LPWSTR>(error_msg.c_str()));`
	`73`	`+ PostError(code, const_cast<LPWSTR>(GET_SQWCHAR_PTR(error_msg)));`
`74`	`74`	`}`
`75`	`75`
`76`	`76`	`/**`