Gcc Error Message Encoding
Re: weird characters in compiler warnings output From: Brian Dessent
or suggest there may have been an error. You can request many specific warnings with options beginning -W, for example -Wimplicit to request warnings on implicit declarations. Each of these specific warning options also has a negative form beginning -Wno- to turn off warnings; for example, -Wno-implicit. This manual lists only one of the two forms, whichever is not the default. The following options control the amount and kinds of warnings produced by GCC; for further, language-specific options also refer to C++ Dialect Options and Objective-C Dialect Options. -fsyntax-onlyCheck the code https://gcc.gnu.org/ml/gcc-help/2006-08/msg00177.html for syntax errors, but don't do anything beyond that. -pedanticIssue all the warnings demanded by strict ISO C and ISO C++; reject all programs that use forbidden extensions, and some other programs that do not follow ISO C and ISO C++. For ISO C, follows the version of the ISO C standard specified by any -std option used. Valid ISO C http://gcc.gnu.org/onlinedocs/gcc-3.4.3/gcc/Warning-Options.html and ISO C++ programs should compile properly with or without this option (though a rare few will require -ansi or a -std option specifying the required version of ISO C). However, without this option, certain GNU extensions and traditional C and C++ features are supported as well. With this option, they are rejected. -pedantic does not cause warning messages for use of the alternate keywords whose names begin and end with __. Pedantic warnings are also disabled in the expression that follows __extension__. However, only system header files should use these escape routes; application programs should avoid them. See Alternate Keywords. Some users try to use -pedantic to check programs for strict ISO C conformance. They soon find that it does not do quite what they want: it finds some non-ISO practices, but not all—only those for which ISO C requires a diagnostic, and some others for which diagnostics have been added. A feature to report any failure to conform to ISO C might be useful in some instances, but would require considerable additional work and would be quite
Control Error and Warning Messages Formatting of Diagnostics Individual Warning Groups Options to Control Clang Crash Diagnostics Options to Emit Optimization Reports Current limitations Other Options Language and Target-Independent Features http://clang.llvm.org/docs/UsersManual.html Controlling Errors and Warnings Controlling How Clang Displays Diagnostics Diagnostic Mappings Diagnostic Categories Controlling Diagnostics via Command Line Flags Controlling Diagnostics via Pragmas Controlling Diagnostics in System Headers Enabling All https://sourceforge.net/p/mingw-w64/mailman/message/31834082/ Diagnostics Controlling Static Analyzer Diagnostics Precompiled Headers Generating a PCH File Using a PCH File Relocatable PCH Files Controlling Code Generation Profile Guided Optimization Differences Between Sampling and Instrumentation Using gcc error Sampling Profilers Sample Profile Formats Sample Profile Text Format Profiling with Instrumentation Disabling Instrumentation Controlling Debug Information Controlling Size of Debug Information Controlling Debugger "Tuning" Comment Parsing Options C Language Features Extensions supported by clang Differences between various standard modes GCC extensions not implemented yet Intentionally unsupported GCC extensions Microsoft extensions C++ Language Features Controlling implementation limits Objective-C Language Features Objective-C++ gcc error message Language Features OpenMP Features Controlling implementation limits Target-Specific Features and Limitations CPU Architectures Features and Limitations X86 ARM PowerPC Other platforms Operating System Features and Limitations Darwin (Mac OS X) Windows Cygwin MinGW32 MinGW-w64 clang-cl Command-Line Options The /fallback Option Introduction¶ The Clang Compiler is an open-source compiler for the C family of programming languages, aiming to be the best in class implementation of these languages. Clang builds on the LLVM optimizer and code generator, allowing it to provide high-quality optimization and code generation support for many targets. For more general information, please see the Clang Web Site or the LLVM Web Site. This document describes important notes about using Clang as a compiler for an end-user, documenting the supported features, command line options, etc. If you are interested in using Clang to build a tool that processes code, please see "Clang" CFE Internals Manual. If you are interested in the Clang Static Analyzer, please see its web page. Clang is designed to support the C family of programming languages, which includes C, Objective-C, C++, and Objective-C++ as w
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