Makefile Mix for C and C++ Post: 302703097

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Top Forums Shell Programming and Scripting Makefile Mix for C and C++ Post 302703097 by DGPickett on Wednesday 19th of September 2012 10:37:05 AM

09-19-2012

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When you want to reference C++ variables in C, you must declare them in C using the wrapper "extern C++ { . . . }", even by way of include file #include lines, and vice-versa with "extern C { . . . }". C++ names are mangled to indicate the type returned and, if method/subroutine/function, the number and types of arguments, for stricter type checking. The original C++ compilers were just preprocessors for the C compiler. If you look at some object code (executables and libraries) using nm, you will see the mangled names of C++ identifiers.

Your make rules need to point to different compiler commands and arguments, using different variables, e.g., not swapping CC from gcc to g++. Sometimes it simplifies things if you use a different directory, or ensure even include files have different suffixes for c++. Try not to make whole new compile lines for every file, but just modify a variable referenced in the common line for moving from one extension to the next. If object file order on linking line is getting to be a pain, remember that code is library files, static or dynamic, is not order sensitive. Even main() can be in a library if all the code in the library serves that main. One class per include file and one subroutine/method/class per non-include file, all compiled -c and non-main() .o put in libraries, is a good practice.

Last edited by DGPickett; 09-19-2012 at 11:47 AM..

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LEARN ABOUT REDHAT

perlce

PERLCE(1) Perl Programmers Reference Guide PERLCE(1)

Name
Perl for WinCE

Description
This file gives the instructions for building Perl5.6 and above for WinCE. Please read and understand the terms under which this software
is distributed.

Build
This section describes the steps to be performed to build PerlCE.

Tools & SDK

For compiling, you need Microsoft Embedded Visual Tools, my celib-sources, my console-sources and a perl for win32.

Needed source files can be downloaded via: www.rainer-keuchel.de/wince/dirlist.html

Some portions of the makefile need a shell for win32, rm, cp, mv, xmkdir (mkdir with a -p option). It also uses my cecopy program for
copying files to the ce device.

Make

Miniperl is not built. A pre-existent win32 perl is used.

The paths for tools and additional libraries have to be changed in wince/makefile.ce.

Different ce targets can be specified with the TARGET macro.

Before you start, you need to build celib.dll and w32console. See instructions in these packages for building.

In the wince directory, type "nmake -f makefile.ce". This should build perl.exe and perl.dll. For building extension dlls, type "nmake -f
makefile.ce dlls"

When building ext dlls, you get lots of macro redefinition errors. Just ignore them.

For further information, look in the text files in the wince sub-directory.

Acknowledgements
The port for Win32 was used as a reference.

Author
Rainer Keuchel (keuchel@netwave.de)

perl v5.8.0 2003-02-18 PERLCE(1)