Gcc Error Message Format
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to stderr (the standard error file) and have the following form: e.adb:3:04: Incorrect spelling of keyword "function" e.adb:4:20: ";" should be "is" The first integer after the file name is the line number in the file, and the second integer is the column number within the line. GPS can parse the
Stlfilt
error messages and point to the referenced character. The following switches provide control over the error gcc options message format: -gnatv The v stands for verbose. The effect of this setting is to write long-format error messages to stdout (the standard output file. The same program compiled with the `-gnatv' switch would generate: 3. funcion X (Q : Integer) | >>> Incorrect spelling of keyword "function" 4. return Integer; | >>> ";" should be "is" The vertical bar indicates the location of the error, and the >>> prefix can be used to search for error messages. When this switch is used the only source lines output are those with errors. -gnatl The l stands for list. This switch causes a full listing of the file to be generated. In the case where a body is compiled, the corresponding spec is also listed, along with any subunits. Typical output from compiling a package body p.adb might look like: Compiling: p.adb 1. package body p is 2. procedure a; 3. procedure a is separate; 4. begin 5. null | >>> missing ";" 6. end; Compiling: p.ads 1. package p is 2. pragma Elaborate_Body | >>> missing ";" 3. end p; Compiling: p-a.adb 1. separate p | >>> missing "(" 2. procedure a is 3. begin 4. null | >>> missing ";" 5. end; When you specify the `-gnatv' or `-gnatl' switches and standard output is redirected, a brief summary is written to stderr (standard error) giving the number of error messages and warning messages generated. -gnatl=`fname' This has the same effect as `-gnatl' except that the output is written to a file instead of to standard output. If the given name fname does not start with a period, then it is the full name of the file to be written. If fname is an extension, it is appended to the name of the file being compiled. For example, if file xyz.adb is compiled with `-gnatl=.lst', then the output is written to file xyz.adb.lst. -gnatU This switch forces all error messages to be preceded by the unique string 'error:'. This means that error messages take a few more characters in space, but allows easy searching for and identification of error messages. -gnatb The b stands for brief. This switch causes GNAT to generate the brief format error messages to stderr (the standard error file) as well as the verbose format message or full listing (which as usual is written to stdout (t
here for a quick overview of the site Help Center Detailed answers to any questions you might have Meta Discuss the workings and policies of this site About Us Learn more about Stack Overflow the company Business Learn more about hiring developers or posting ads with us Stack Overflow Questions Jobs Documentation Tags Users Badges Ask Question x Dismiss Join the Stack Overflow Community Stack Overflow is a community of 4.7 million programmers, just like you, helping each other. Join them; it only takes a minute: Sign up Is there https://gcc.gnu.org/onlinedocs/gnat_ugn/Output-and-Error-Message-Control.html any way to get readable gcc error and warning output at the command line? up vote 20 down vote favorite 7 For some long errors, the gcc output is dense and has lots of line-wrapping etc. Especially when errors are subtle, it can take me 10-30 seconds of squinting to parse it with my eyes. I've taken to pasting this in an open code-editor http://stackoverflow.com/questions/656420/is-there-any-way-to-get-readable-gcc-error-and-warning-output-at-the-command-lin window to get some basic syntax highlighting and enable reformatting with regex's. Has anyone invented a more automated method? c++ c gcc gcc-warning share|improve this question asked Mar 17 '09 at 23:27 mikeh 1 I just make the window very wide... –i_am_jorf Mar 17 '09 at 23:33 And the font very small ;) –Anonymous Mar 17 '09 at 23:35 1 and then stop using gcc. :D –Robert P Mar 17 '09 at 23:44 2 Clarification: I love intel's c++ compiler. The messages are clean, short, and pointed. Back when I still had a license, I'd test my compiles in intel's compiler before I built with GCC just to find the big problems. –Robert P Mar 17 '09 at 23:45 @Robert I'm intrigued, hope I get a chance to try that sometime. Not appropriate on the current project unfortunately... –mikeh Mar 18 '09 at 4:28 | show 1 more comment 8 Answers 8 active oldest votes up vote 14 down vote I've found colorgcc to be invaluable. By introducing coloring, it becomes much easier to mentally parse the text of gcc error messages, e
here for a quick overview of the site Help Center Detailed answers to any questions you might have Meta Discuss the workings and policies of this site About Us Learn more about Stack Overflow the company Business Learn more about hiring developers or posting ads http://stackoverflow.com/questions/3039156/gcc-c-command-line-error-message-parser with us Stack Overflow Questions Jobs Documentation Tags Users Badges Ask Question x Dismiss Join the http://clang.llvm.org/diagnostics.html Stack Overflow Community Stack Overflow is a community of 4.7 million programmers, just like you, helping each other. Join them; it only takes a minute: Sign up gcc c++ command line error-message parser up vote 6 down vote favorite 1 Are there any programs for parsing and displaying in a nice format the c++ error messages generated by gcc. I'm really looking for something like less that gcc error I can pipe my errors into that will collapse the template parameter lists by default, maybe with some nice highlighting so that my errors are actually readable. (Yes, it's boost's fault I have such incomprehensible errors, in case you were wondering) c++ gcc boost share|improve this question asked Jun 14 '10 at 16:52 James 14.6k453106 I generally use less myself... that way I can see the very first line of error quickly and in most cases that's enough for me to gcc error message fix the error. make | less -S ... –Alexis Wilke Jan 13 '14 at 22:12 add a comment| 3 Answers 3 active oldest votes up vote 1 down vote accepted STL Error Decryptor (AKA STLFilt) can help decode them. I've had mixed results. share|improve this answer edited Jun 14 '10 at 18:22 deft_code 26.5k1599174 answered Jun 14 '10 at 16:58 Stephen 24.7k53757 Thanks, it works somewhat, not perfect though! –James Jun 22 '10 at 11:32 add a comment| up vote 0 down vote Both STLFilt and TextFilt format and filter complicated c++ error messages. STLFilt has more features and seems to be better maintained. TextFilt is more customizable. share|improve this answer answered Jun 14 '10 at 18:29 deft_code 26.5k1599174 add a comment| up vote 0 down vote This is the way that I have used to resolve this issue, it might not be the best but it helps a lot if you have a heavily templated C++ code. share|improve this answer answered Jan 13 '14 at 22:07 Mani Zandifar 58169 add a comment| Your Answer draft saved draft discarded Sign up or log in Sign up using Google Sign up using Facebook Sign up using Email and Password Post as a guest Name Email Post as a guest Name Email discard By posting your answer, you agree to the privacy policy and terms of service. Not the answer you're looking for? Browse other questions tagged c++ gcc boost or ask your own question.
Automatic Bug-Finding Writing Clang Tools Communication cfe-users List cfe-dev List cfe-commits List Bug Reports Planet Clang IRC: irc.oftc.net#llvm The Code Check Out SVN Browse SVN Browse ViewVC doxygen Quick Links Testing Coverage Clang Events October 2009 November 2010 LLVM events Expressive Diagnostics In addition to being fast and functional, we aim to make Clang extremely user friendly. As far as a command-line compiler goes, this basically boils down to making the diagnostics (error and warning messages) generated by the compiler be as useful as possible. There are several ways that we do this. This section talks about the experience provided by the command line compiler, contrasting Clang output to GCC 4.9's output in some cases. Column Numbers and Caret Diagnostics First, all diagnostics produced by clang include full column number information. The clang command-line compiler driver uses this information to print "point diagnostics". (IDEs can use the information to display in-line error markup.) This is nice because it makes it very easy to understand exactly what is wrong in a particular piece of code. The point (the green "^" character) exactly shows where the problem is, even inside of a string. This makes it really easy to jump to the problem and helps when multiple instances of the same character occur on a line. (We'll revisit this more in following examples.) $ gcc-4.9 -fsyntax-only -Wformat format-strings.c format-strings.c: In function 'void f()': format-strings.c:91:16: warning: field precision specifier '.*' expects a matching 'int' argument [-Wformat=] printf("%.*d"); ^ format-strings.c:91:16: warning: format '%d' expects a matching 'int' argument [-Wformat=] $ clang -fsyntax-only format-strings.c format-strings.c:91:13: warning: '.*' specified field precision is missing a matching 'int' argument printf("%.*d"); ^ Note that modern versions of GCC have followed Clang's lead, and are now able to give a column for a diagnostic, and include a snippet of source text in the result. However, Clang's column number is much more accurate, pointing at the problematic format specifier, rather than the ) character