include

Can I get a report of ALL the libraries linked when building my C++ executable (gcc)? (including statically linked)

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I had similar problem and found solution: add -Wl,–verbose option when linking. It will switch linker to verbose mode: gcc -o test main.o -ltest -L. -Wl,–verbose Here is example output: GNU ld (GNU Binutils) 2.23.52.20130604 Supported emulations: i386pep i386pe using internal linker script: ================================================== /* Default linker script, for normal executables */ [many lines here] … Read more

How to share variables across my .rb files?

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Constants (which include modules and classes) are added to the shared global environment: phrogz$ cat constants1.rb TEST_VARIABLE = “test” phrogz$ cat constants2.rb require_relative ‘constants1’ p TEST_VARIABLE phrogz$ ruby constants2.rb “test” Instance variables declared in main are all part of the same main: phrogz$ cat instance1.rb @test_variable = “test” phrogz$ cat instance2.rb require_relative ‘instance1’ p @test_variable … Read more

Inserting Headers and Footers in Ruby on Rails web application?

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In the new_app/views/layouts there will be a file called application.html.erb. Open that file and put your header content above where it is written <%= yield> and footer content below <%=yield>. I usually make a parital in layouts file called _header.html.erb and _footer.html.erb and do something like this :- <%= render “layouts/header” %> <%=yield %> <%= … Read more

Include html in another html file [duplicate]

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Method 1: I think it would be best way to include an html content/file into another html file using jQuery. You can simply include the jQuery.js and load the HTML file using $(“#DivContent”).load(“yourFile.html”); For example <html> <head> <script src=”https://stackoverflow.com/questions/38837835/jquery.js”></script> <script> $(function(){ $(“#DivContent”).load(“another_file.html”); }); </script> </head> <body> <div id=”DivContent”></div> </body> </html> Method 2: There are no … Read more

‘RTLD_NEXT’ undeclared

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The issue here is that RTLD_NEXT is not defined by the posix standard . So the GNU people don’t enable it unless you #define _GNU_SOURCE or -D_GNU_SOURCE. Other relevant pieces of POSIX are dlfcn.h and dlsym.h. Interestingly, the later mentions RTLD_NEXT. Apparently, the GNU people are a bit confused about what is an extension and … Read more

In what order should headers be included? [closed]

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In a header file you have to include ALL the headers to make it compilable. And don’t forget to use forward declarations instead of some headers. In a source file: corresponded header file necessary project headers 3rd party libraries headers standard libraries headers system headers In that order you will not miss any of your … Read more

Why don’t include guards make a circular #include work?

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The preprocessor is a program that takes your program, makes some changes (for example include files (#include), macro expansion (#define), and basically everything that starts with #) and gives the “clean” result to the compiler. The preprocessor works like this when it sees #include: When you write: #include “some_file” The contents of some_file almost literally … Read more