Re: [Mingw-users] adding my own libraries to mingw

[William S. <wil...@gm...>]

I just used the makefile that Keith told me to use...

Sorry for seeming stupid to you, but as I said, I do programming maybe
a total of 14 full days per year. I know enough to get the job done,
and the gnu manuals seem to me to be written in a deliberately
obscurantist way... (I know that is not the case -- just seems that
way). You have to understand that I do not code every day, and I do
not do anything fancy. I do not manage big projects. A program is
typically one or two pages of letter size paper.

Thanks for the help. I will try to figure out why mingw make is
confused about what directory it is in. I am referring to my makefile,
not Keith's. [Keith's did not work at all, as shown in the message
below] Mine [which I also posted here] worked and created librand.a
fine. It just didn't move and del files correctly, looking in the
worng place for them. When I invoke make in a given directory, and my
makefile tells it to move a file from *here* to *there*, it should
know to look *here* for the file to move! It doesn't. It looks in c:\
I never told make to look there. When I start up cmd.exe, the
autorun.bat tells it to start in c:\. Else it starts in something like
...My Documents...
I don't see why that would be the problem, since this is a sensible
place to start, in the search path for everybody. It does not confuse
gcc for example, or any other command I use.

I have been C programming 10 years. As I say, I do simple things, and
my knowledge has been adequate for that under djgpp. I have moved to
mingw and I need to get to the same point I was with djgpp. That is
all I am looking to do.

Thanks again, everyone.

Cheers
Bill


For ref, here is the makefile Keith gave me a couple of posts ago:

==========
You should break this up, into separate build and install rules, (and
for preference, also separate clean rules):

 rand: librand.a

 CC = gcc

# I made these 2 small changes below to point to the correct directories
 libdir = c:/mingw/local/lib
 includedir = c:/mingw/local/inlcude

 %.o: %.c
         $(CC) -c $<

 rand.o: rand.c rand.h

 librand.a: rand.o # and any other objects you wish it to include
         del $@
         ar rcvs $@ $^

 install:
         copy librand.a $(libdir)
         copy rand.h $(includedir)

 clean:
         del *.o

 distclean: clean
         del *.a



On Thu, Nov 25, 2010 at 11:52 PM, John Brown <joh...@ho...> wrote:
>
> On Thu, 25 Nov 2010 17:08:33 +0000, William Simpson wrote:
>
>
>>
>> OK using the suggested makefile on my rand library, I get:
>>
>> C:\MinGW\local\lib\src\rand>make
>> gcc rand.o librand.a -o rand
>> c:/mingw/bin/../lib/gcc/mingw32/4.5.0/../../../libmingw32.a(main.o):main.c:(.tex
>> t+0xd2): undefined reference to `WinMain@16'
>> collect2: ld returned 1 exit status
>> mingw32-make: *** [rand] Error 1
>>
>
> This command is trying to link rand.o with librand.a to make an executablecalled rand(.exe on Windows). This can't possibly be what you meant to do.
> Since every program must have a main() (or WinMain() for GUI programs),and rand.o does not, the linker complains.
> You really should just  Google for a tutorial that explains how to compileprograms with gcc. The gcc manual (available at www.gnu.org) probablywon't help you with that.
> Regards,
> Alias John Brown.
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