How do you suppress GCC linker warnings? -


I recently went to a campaign to eliminate warnings from my code and became familiar with the GCC alert flag (E.g., -Wall , -no-> warning to disable> , -fdiagnostics-show-option , etc. ). Although I did not understand how to disable (or even control) Linker Alerts The most common linker warning I was getting is the following: 

  LD: Warning: & lt; Some symbols & gt; & Lt; Path / to / library.a & gt; Has different visibility (default) and (hidden) & lt; Path / to / my / class.o & gt; I was getting this reason because this library I was using was created using  default  visibility, while my app was hidden   Visibility I have fixed it by rebuilding the library with  hidden  visibility. 
 
 My question is: If I want to stop that warning? It's nothing like what I have to do now, I know how to fix it, but I'm still curious how would you suppress that particular warning - or any linker warnings in general? 
 
 Using the  -fdiagnostics-show-option  for any C / C ++ / linker flag does not say where the alert comes from the way other compiler warnings.

Actually, you can not disable GCC Linker Alert, because it is a specific binary library Is stored in the section that you are linking to. (The section is called .gnu.warning. Symbol )

You can mute it, such as (it is derived from libc-symbols.h): < / P>

Without it: 

  #include & lt; Sys / stat.h & gt; Int main () {lchmod ("/ path / to / whatever", 0666); Return 0; }

returns: 

  $ gcc ac /tmp/cc0TGjC8.o: in the function «main»: ac :(. Text + 0xf): Warning: Lchmod has not been implemented and will always fail if

is unsuccessful: 

  #include & lt; Sys / stat.h & gt; / * We want that the .gnu.warning.SYMBOL section to be unallocated * / #define __make_section_non-section (section_string) \ __asm__ (".section" section_string "\ n \ t.previous"); / * When a reference to SYMBOL comes up, the linker will emit a warning message MSG. * / # Defin mute_word (symbol) \ __make_section_noncoken (".gnu.warning." #symbol) Mute_verning (LCMOD) main () (lchmod ("/ path / whatever", 0666); return 0;}

returns: 

  $ gcc ac /tmp/cc195eKj.o: in the function «main»: ac :(. Text + 0xf): Warning:

with hiding: 

  #include  #define __hide_section_warning (section_string) \ __asm__ (".section" section_string "\ N.string \" \ rHello world! \ "\ N \ t.previous"); / * If you want to hide the output of the linker * / #define hide_warning (symbol) \ __hide_section_warning (".gnu.warning. "#symbol) hide_ Warning (lchmod) int main () {lchmod ("/ path / to / whatever", 0666); return 0;}

returns: 

  $ Gcc ac /tmp/cc195eKj.o: In the function «main»: Hello world!

Obviously, in that case Hello World! So many ads or some advertisements for your amazing project.


-

Comments

Post a Comment

Popular posts from this blog

Eclipse CDT variable colors in editor -

I hope this is a good question to ask here. This programming is related, so I thought it would be better than the superuser, so I am using the CDT C ++ Eclipse plugin. I know how the editor changes colors for some things But is there a way to do that all the variables are different colors? For example in KDEValue, it sets the local variables and square variables in different colors and bold square squares. Can I copy it to CDT? Eclips provides some level of color customization for text editor syntax You can see it on the following: There are many elements, including the Window> Preferences> C / C ++> Editor> Syntax color code that can be changed, assembly, Comments, Preprocessor and Doxian Under the code, it is possible to change the color of some variable types, such as global variables, local variable announcements, local variable references, and parameter variables. But I do not think the code is capable of changing the color of each variable declared....
Read more

AJAX doesn't send POST query -

$ (दस्तावेज़) .ready (function () {function ajaxselectrss (rssurlvar) {var ajaxRequest; // वेरिएबल जो अजाक्स को संभव बनाता है! कोशिश करें कि {// ओपेरा 8.0+, फ़ायरफ़ॉक्स, सफारी अजाक्स अनुरोध} = नया एक्सएमएलएचटीपीआरइवेस्ट ();} कैच (ई) {// इंटरनेट एक्सप्लोरर ब्राउज़र्स {ajaxRequest = new ActiveXObject ("Msxml2.XMLHTTP");} पकड़ो (ई) {try {ajaxRequest = new ActiveXObject ("Microsoft.XMLHTTP");} कैच (ई) {// कुछ गलत चेतावनी ("आपका ब्राउज़र तोड़ दिया!"); वापसी झूठी;}}} // एक बनाएं फ़ंक्शन जो सर्वर से भेजे गए डेटा प्राप्त करेंगे ajaxRequest.onreadystatechange = function () {if (ajaxRequest.readyState == 4) {var ajaxDisplay = document.getElementById ('news'); ajaxDisplay.innerHTML = ajaxRequest.responseText;}} / / Var rssurlvar = $ (this) .attr ("title"); var queryString = "rurl =" + rssurlvar; var urltofile = "rssget.php"; ajaxRequest.open ("पोस्ट", urltofile, सच); ajaxRequ Est.setRequestHeader ("सामग्री-प्र...
Read more

wpf - Custom Message Box Advice -

Well, I'm using a custom window box that comes with some custom control boxes that accompany the text The producers who are displayed are called. I have a defined event, which has been subscribed through the original class, it gets burnt when clicking on the button. However, I can not see how to use it effectively, I would like to return one yes, whether yes or not, but obviously my code will continue to execute, so this Below is some example code to clarify the problem that the method has subscibed by clicking on the button. Message box window Public partial class custom message box: window {public representative message messagebox object sender, event events e); Public event messagebox handler messagebox document; Public Customs Box () {Initial group (); } Public Customsbox (String Message) {InitializeComponent (); This.txtdescription.Text = Message; } Public Customsbox (String Message, String Title, String First BTNtext) {Initialization (); This.lbltitle.Content =...
Read more