diff options
Diffstat (limited to 'include/llvm/Support/Program.h')
| -rw-r--r-- | include/llvm/Support/Program.h | 26 |
1 files changed, 15 insertions, 11 deletions
diff --git a/include/llvm/Support/Program.h b/include/llvm/Support/Program.h index 00571a4..a1067a6 100644 --- a/include/llvm/Support/Program.h +++ b/include/llvm/Support/Program.h @@ -52,27 +52,31 @@ struct ProcessInfo { ProcessInfo(); }; - /// This static constructor (factory) will attempt to locate a program in - /// the operating system's file system using some pre-determined set of - /// locations to search (e.g. the PATH on Unix). Paths with slashes are - /// returned unmodified. - /// @returns A Path object initialized to the path of the program or a - /// Path object that is empty (invalid) if the program could not be found. - /// @brief Construct a Program by finding it by name. + /// This function attempts to locate a program in the operating + /// system's file system using some pre-determined set of locations to search + /// (e.g. the PATH on Unix). Paths with slashes are returned unmodified. + /// + /// It does not perform hashing as a shell would but instead stats each PATH + /// entry individually so should generally be avoided. Core LLVM library + /// functions and options should instead require fully specified paths. + /// + /// @returns A string containing the path of the program or an empty string if + /// the program could not be found. std::string FindProgramByName(const std::string& name); - // These functions change the specified standard stream (stdin, stdout, or - // stderr) to binary mode. They return errc::success if the specified stream + // These functions change the specified standard stream (stdin or stdout) to + // binary mode. They return errc::success if the specified stream // was changed. Otherwise a platform dependent error is returned. error_code ChangeStdinToBinary(); error_code ChangeStdoutToBinary(); - error_code ChangeStderrToBinary(); /// This function executes the program using the arguments provided. The /// invoked program will inherit the stdin, stdout, and stderr file /// descriptors, the environment and other configuration settings of the /// invoking program. - /// This function waits the program to finish. + /// This function waits for the program to finish, so should be avoided in + /// library functions that aren't expected to block. Consider using + /// ExecuteNoWait() instead. /// @returns an integer result code indicating the status of the program. /// A zero or positive value indicates the result code of the program. /// -1 indicates failure to execute |