Makefile Mix for C and C++ Post: 302703905

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Top Forums Shell Programming and Scripting Makefile Mix for C and C++ Post 302703905 by hfbrando on Thursday 20th of September 2012 02:05:24 PM

09-20-2012

Registered User

Thank you DGPickett for your answer.
I've been looking for the use of extern in ANSI C, and I tried several ways to code it:

Code:

extern "C++" {
      #include <opencv2/features2d/features2d.hpp>
}

But it didn't work (the compiler threw errors because of the quotation marks or the braces... I changed them by parenthesis and simple quotation marks, but It didn't work. After I found a post (*) that say that C does not define linkage to any other language (but C++ does).
So I tried with extern "C" in the c++ library, but when I compiled it threw the same compilation error...

ardrone_testing_tool.c: (.text+0x1212) : undefined reference to `cvSURFParams'
ardrone_testing_tool.c: (.text+0x126f) : undefined reference to `cvExtractSURF'

In that link, they say also that I could try with the compiler g++ (I should fix the errors I put in the last post).
What do you think about that?

Concerning the compiler, you mean to take out '.cpp' in INTERNAL_SOURCE_EXTENSIONS, and after put the .hpp file in a separated folder and call the g++ just for that folder and generate the .o ?
How can I put all the .o files all together ?

Is it OK what I'm saying? Sorry if I'm saying something that is wrong, I started just some days ago with the GNU makefile.

Thanks a lot.

(*) The forum does not allow to put links before 5 posts. Write on google "linking a C++ library to a C program" bytes

hfbrando

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mojolicious::command::generate::makefile

Mojolicious::Command::generate::makefile(3pm)		User Contributed Perl Documentation	     Mojolicious::Command::generate::makefile(3pm)

NAME

       Mojolicious::Command::generate::makefile - Makefile generator command

SYNOPSIS

	 use Mojolicious::Command::generate::makefile;

	 my $makefile = Mojolicious::Command::generate::makefile->new;
	 $makefile->run(@ARGV);

DESCRIPTION

       Mojolicious::Command::generate::makefile generates "Makefile.PL" files for applications.

ATTRIBUTES

       Mojolicious::Command::generate::makefile inherits all attributes from Mojo::Command and implements the following new ones.

   "description"
	 my $description = $makefile->description;
	 $makefile	 = $makefile->description('Foo!');

       Short description of this command, used for the command list.

   "usage"
	 my $usage = $makefile->usage;
	 $makefile = $makefile->usage('Foo!');

       Usage information for this command, used for the help screen.

METHODS

       Mojolicious::Command::generate::makefile inherits all methods from Mojo::Command and implements the following new ones.

   "run"
	 $makefile->run(@ARGV);

       Run this command.

SEE ALSO

       Mojolicious, Mojolicious::Guides, <http://mojolicio.us>.

perl v5.14.2							    2012-09-05			     Mojolicious::Command::generate::makefile(3pm)