I'm generating a makefile that I want to work in both linux and windows which creates a defined variable with my SVN build number which I would like to use in my code. (note: I don't want the build version hard coded in the makefile, but rather I want the version gathered at the time I build my project)
I found out how to do this in Linux with 'BUILDVERSION="$(shell svnversion)"'
But how can I do this in windows?
I've google searched on things like "makefile $(shell) equivalent on windows", but haven't been able to find the equivalent call. (I'm not all that experienced with makefiles so I'm not even sure what would be good keywords to search on to find this)
Thanks in advance for any advice.
If you use GNU make on Windows, then you can do it exactly the same way.
If you use some other make, such as nmake, then I don't think you can do it (but I'm no nmake expert). For sure you won't be able to use the same makefile on both Linux and Windows unless you use a portable make (e.g., GNU make) on both systems.
Related
I have two different options in gcc.
In linux is one in Mac other
How check in makefile what system current is?
Windows, Linux, or OSX
You can use built in shell commands such as uname (on Unix systems) and parse the output. There's no built in functionality for it.
If you're doing this with the intention of distributing software, then rather than tweak Makefiles internally (there is no good solution to this; I wouldn't even try), you should investigate a build system which allows users to configure the build dynamically.
The most common mechanism for that is autoconf. Autoconf is a little tricky to get started with – there's a non-trivial learning curve, but it's in reality somewhat simpler than it looks at first – but it has the advantage that use of autoconf is very widespread. If people are building a bit of software from source, they're rarely surprised to see a configure script, at which point their fingers automatically tap out ./configure; make; make install.
The Wikipedia page on autoconf actually makes it look rather harder than it is, because the diagram displays the full-blown autoconf+automake+autoheader+aclocal ecosystem (what, they missed out libtool?!). That page also rather goes to town on its ‘Criticism’ of autoconf. While none of the points it makes are actually false, their importance is rather overstated.
Simple add this in Makefile:
ifeq ($(UNAME_S),Linux)
OPCJE = -Wall -Wno-unused-const-variable
else
OPCJE = -Wall
endif
I've got a makefile (a file called 'Makefile' which is run by cmake in Linux, but works in Windows via nmake I believe and needs to be run in VS command prompt.)
And most of the 'sample' ones I can see are just one line (and the rest appear to be stuff I don't 'yet' understand and then this same one line.
include $(shell rospack find mk)/cmake.mk
(in the terminal rospack find [package] returns the path to said package, and cmake.mk is obviously the file it wants to include)
My problem is, that this appears (to me at least) to be written for use in a Linux system (which basically the entirety of ros, the program I'm working with, was) and in Windows this appears to just try to be
include /cmake.mk
(which unsurprisingly doesn't work)
Basically I need to know how to do the same thing in windows, generally in a 'dynamic' way, as it will only cause more problems down the line if I get this working by hard-coding the directory path and then it breaks because its not set properly some time in the future)
So I guess if this isn't possible or is particularly hard, a way of hard coding it would be a stopgap.
I tried:
include C:\[directory]\cmake.mk
but it seems to have issues with the ':'
I'm trying to work with Windows, because later in my project I'll be needing to use another program (for i90 robot) for which we only have Windows support.
OK, so apparently it acts differently if the file is actually in the folder.
as in
include C:\[directory]\cmake.mk
Errors with
C:\[directory]\cmake.mk not found
if the file isn't there, and
fatal error U1034: syntax error : separator missing
if it is
While this doesn't really seem to impact on the original problem, I guess it indicates I'm trying to do something funky windows doesn't like.
The short answer is, you'll never get a single makefile that does much of anything complicated that will work both with standard UNIX-style make (such as GNU make from GNU/Linux) and also work with nmake. Nmake is a completely different beast.
As an aside, it's confusing that your makefiles here are called "cmake", because cmake is an actual program, distinct from make (and nmake). I'm assuming, though, from the context that the use of the term "cmake" here doesn't refer to the actual cmake utility. Which is too bad, because if it did use cmake things would be simpler for you. Maybe.
It's not clear exactly what your requirement to use nmake is, though. If you laid out your real requirements, it would be a lot easier for us to advise you. For example, you say you need to use a "another program" which runs only on Windows. What does this program do, exactly, and how will you need to use it? Does it provide libraries that need to be linked with the "ros" code?
Basically, your simplest way forward is to obtain a UNIX-like environment, including tools like GNU make, for your Windows system. There are two main choices: Cygwin, which provides a completely POSIX infrastructure including shell, compiler, etc. which are ports of the GNU environment to Windows but require a POSIX layer, and MinGW, which has various GNU tools that run more or less natively on Windows.
However, if you MUST use Visual Studio as your compiler, for example, then these will be much more difficult to integrate.
For a university course I have to write a http server which is supposed to run on both Linux and Windows.
I have got a humble Linux machine which I don't think can handle any kind of heavy virtual environment, neither I'm willing to go through the hassle of installing it.
This is the first project of mine complex enough (I estimate ~1.5 months to develop) to require an environment sufficiently comfortable to alternate rapidly between short coding and testing sessions (the latter on both platforms, of course).
So, I was wondering what could be the best set up for this situation. I think testing it on Wine would be ok (it is not a real-world thing, after all), and I installed MinGW for the Windows-targeting part.
Basically, a simple well-written makefile could solve my problem... It should build both the Linux and Windows binaries and place them in the respective folders (the Windows one in the Wine sub-tree) and I'm all done! But I feel very inexperienced in this thing and I really don't know where to start. Maybe the make manual, ahah!:)
Thoughts, suggestions, anything I didn't think/know!
Thank you!
(PS. I'm planning to use emacs as editor, or maybe learn vim. Unless eclipse provide some kind of skynet-like plugin that entirely solve this problem...:)
You're on the right track. It's not that complicated, really, thanks to MinGW. You basically need two things:
The code has to be portable across the OSes. MinGW has some POSIX support, but you'll probably need to either use Cygwin in order to be able to use the POSIX interface or have your own compatibility layer for interfacing with the OS. I'd probably go for Cygwin as then you can code only against POSIX and won't have to test and debug your compatibility layer. Also, make sure you won't use any external libraries that are OS specific. Non-portable code often results in a compile error, but make sure you test the application thoroughly anyway.
The toolchains for targeting Linux and Windows. You already have them, you just need to use them correctly. Normally you'd use a variable like $(CROSS_COMPILE) as a prefix when calling the toolchain during cross compilation. So when compiling for Linux, you call gcc, ld, etc. (having the CROSS_COMPILE variable empty), and when compiling for Windows you call e.g. i486-mingw32-gcc, i486-mingw32-ld etc., i.e. CROSS_COMPILE=i486-mingw32-. Or just just define CC, LD etc. depending on the target.
I wrote a small game on Linux and made it run on Windows as well. If you browse the code, you can see the code has next to no #ifdef jungle (basically just some extra debugging features enabled for Linux), and the Makefile is simple as well, with no complicated handling for cross-compilation, just the possibility to override CC etc. like it should be. As lots of important open source software is written this way (especially software that's used by the desktop and embedded devices), you should also be able to find lots of other examples on how to set up the build environment correctly.
As for testing the application on Windows, I think the best option is if you can find a real Windows machine somehow. If you do everything correctly, it should run the same as on Linux and you won't need to continuously test your application on both OSes. If testing on a Windows machine is not possible, a VM would be the next best choice, though it would probably be more difficult to set it up. Wine is a good backup plan, but I don't think you can be sure your application works well on Windows if you only tested it on Wine.
Hoping for a bit of insight here. I have source code for one of our projects, with no documentation on how to compile, and all people who wrote it having left :) We have an issue in it and lucky moi has been tasked to investigate.
Currently I'm trying to build on AIX, the makefile keeps on complaining with either
make: 1254-055 Dependency line needs colon or double colon operator.
or
make: 1254-057 Shell command needs a leading tab.
The CPP options seem to be xlc options, and the software has been compiled many times before. The makefile contains control characters from windows in it and does have tabs against some of the entries but not all the shell commands.
Any thoughts on what could be the issue running make on the code? I haven't installed GNU make as of yet, could this solve the issues?
Classic SysV make is much more picky about formatting than gnumake is, never mind the feature set is much more restricted. I don't even bother writing "classic" compatible Makefiles anymore - too painful.
Even though we use the native compilers (xlc) on AIX, we still use gmake as our dependency/build tool.
I recommend installing a managed copy of gmake, downloadable from a couple sources:
Direct from IBM thru the AIX/Linux toolbox.
As an RPM from here.
From Bull here.
As lpp packages from pware here.
Good luck!
I think you might need to use gmake even on AIX. The original make may not be working as expected. The Windows control character may or may not matter (usually does not), but can be edited out on vi.
With C++ sources, in my company :
On AIX, we use make (and xlC_r compiler).
On AS400, we use gmake (and ixlc compiler). Because make exists, but is PASE only.
gmake was certainly found on some old website... there are many other GNU programs on our iSeries. I haven't found any trace of it beside the PGM.
Is there any difference between makefile in Windows and Linux?
If I know how to use it in Linux, is it necessary to learn
something new when in Windows system?
The fine folks over at GnuWin32 have Gnu make built for Windows as a native binary. It works well, but does have a few minor quirks due to a well-intentioned hack that tries to equate a target named foo with the file foo.exe. The GnuWin32 package does include a nice PDF of the manual, IIRC.
I use it on XP alongside GCC from the MinGW project, as well as with several different embedded systems cross compiler toolchains. MinGW also provides a native build of Gnu Make.
We do use Cygwin for a couple of projects, in particular one where the system-on-a-chip vendor provided a complete, working toolchain and build environment hosted in Cygwin. Moving it to a native Windows shaped build would be prohibitively expensive, and would make it harder to accept updates from the vendor.
If you want to use mostly native Windows tools, but need to start by running configure on an existing source kit, then take a look at MSYS. This started as a fork of Cygwin by the MinGW developers, and it intends to provide a minimal set of unix-like tools with a bash shell so that configure can be used on Windows. It isn't as complete as Cygwin, but it is a lot lighter weight.
You will find that the manual for Gnu Make is mostly true. However, you have to keep in mind that the content of a Makefile is not written in a single language. The stuff that defines variables and lays out the dependancy tree is one language. Each line of an action is a miniature shell script that is in the language of the default shell (which might be CMD.EXE rather than /bin/sh on Windows), and each command has options and arguments.
If you are comfortable with your *nix build environment, then Cygwin might be the path of least pain. But MSYS is often sufficient, and there is something to be said for adopting the native tools of the target platform so that you have a sense of how your users see Windows, in which case MinGW and GnuWin32 are handy resources to know about.
In addition to what iftrue note that Microsoft has a Makefile based build tool called nmake with some changes in syntax/semantics from the traditional *nix based make tool. This page lists some of the differences.
Well, if you download "cygwin", you can run the "make" tool directly on windows, but you may want to look into a true cross-platform build tool such as "cmake". It's like make, but it's a bit more spiffy and is inherently cross-platform.