473,408 Members | 2,839 Online
Bytes | Software Development & Data Engineering Community
Post Job

Home Posts Topics Members FAQ

Join Bytes to post your question to a community of 473,408 software developers and data experts.

Eclipse CDT, cygwin and linking problems

Hi all,
I've installed the CDT plugin for Eclipse and I want to use it to work
on C/C++ projects under Cygwin. It works, in fact it compiles and runs
the usual helloworld c++ program. Now it comes difficult when I try to
add external libs. Such as... GTK. Let's explain what I tried. (oh
well, I'm using Eclipse Europa 3.3.1 and CDT 4.0.1). First I just
added the path of the cygwin includes throug the project->properties-
>C/C++ General->Paths and Symbols window. I added in Includes under
GNU C the path to the gtk-2.0 includes in cygwin/usr/include/gtk-2.0
folder. No effect. It says that it couldn't find gtk/gtk.h . So, since
it's a C++ project, I tried to add them under GNU C++. As a result the
compiler starts putting out messages about every header in the library
compelling that ISO C forbids this and that...
Let's note that my include is
#include <gtk/gtk.hbut i get the same results with <gtk.hand "gtk/
gtk.h".

I don't get it, but I'd like to use eclipse to devlop in C/C++ because
of positive Java experiences.

Do you have any ideas, most tutorials on the topic are outdated and
the old CDT is quite different, especially regarding the project
types.
Jan 15 '08 #1
10 8486
Gotch@ wrote:
Hi all,
I've installed the CDT plugin for Eclipse and I want to use it to work
on C/C++ projects under Cygwin. It works, in fact it compiles and runs
the usual helloworld c++ program. Now it comes difficult when I try to
add external libs. Such as... GTK. Let's explain what I tried. (oh
well, I'm using Eclipse Europa 3.3.1 and CDT 4.0.1). First I just
added the path of the cygwin includes throug the project->properties-
>C/C++ General->Paths and Symbols window. I added in Includes under
GNU C the path to the gtk-2.0 includes in cygwin/usr/include/gtk-2.0
folder. No effect. It says that it couldn't find gtk/gtk.h .
You addedd the path to
/usr/include/gtk-2.0 BUT the code expects
/usr/include/gtk

Try to make a symbolic link of gtk-2.0 to gtk

--
jacob navia
jacob at jacob point remcomp point fr
logiciels/informatique
http://www.cs.virginia.edu/~lcc-win32
Jan 15 '08 #2
The symlink is not seen by Windows file access routines... I'll try to
just rename the folder... hope this wuoldn't break up anything...

On 15 Gen, 14:45, jacob navia <ja...@nospam.comwrote:
Gotch@ wrote:
Hi all,
I've installed the CDT plugin for Eclipse and I want to use it to work
on C/C++ projects under Cygwin. It works, in fact it compiles and runs
the usual helloworld c++ program. Now it comes difficult when I try to
add external libs. Such as... GTK. Let's explain what I tried. (oh
well, I'm using Eclipse Europa 3.3.1 and CDT 4.0.1). First I just
added the path of the cygwin includes throug the project->properties-
C/C++ General->Paths and Symbols window. I added in Includes under
GNU C the path to the gtk-2.0 includes in cygwin/usr/include/gtk-2.0
folder. No effect. It says that it couldn't find gtk/gtk.h .

You addedd the path to
/usr/include/gtk-2.0 BUT the code expects
/usr/include/gtk

Try to make a symbolic link of gtk-2.0 to gtk

--
jacob navia
jacob at jacob point remcomp point fr
logiciels/informatiquehttp://www.cs.virginia.edu/~lcc-win32
Jan 15 '08 #3
"Gotch@" <da******@gmail.comwrites:
>
On 15 Gen, 14:45, jacob navia <ja...@nospam.comwrote:
>Gotch@ wrote:
Hi all,
I've installed the CDT plugin for Eclipse and I want to use it to work
on C/C++ projects under Cygwin. It works, in fact it compiles and runs
the usual helloworld c++ program. Now it comes difficult when I try to
add external libs. Such as... GTK. Let's explain what I tried. (oh
well, I'm using Eclipse Europa 3.3.1 and CDT 4.0.1). First I just
added the path of the cygwin includes throug the project->properties-
C/C++ General->Paths and Symbols window. I added in Includes under
GNU C the path to the gtk-2.0 includes in cygwin/usr/include/gtk-2.0
folder. No effect. It says that it couldn't find gtk/gtk.h .

You addedd the path to
/usr/include/gtk-2.0 BUT the code expects
/usr/include/gtk

Try to make a symbolic link of gtk-2.0 to gtk

The symlink is not seen by Windows file access routines... I'll try to
just rename the folder... hope this wuoldn't break up anything...
Your question is about Cygwin, Eclipse, and CDT, not about the C
programming language. If you want help, you should ask in a forum
where these things are topical. Possibly one of the Cygwin mailing
lists would be helpful (see www.cygwin.com), or perhaps a forum that
deals with Eclipse.

--
Keith Thompson (The_Other_Keith) <ks***@mib.org>
Nokia
"We must do something. This is something. Therefore, we must do this."
-- Antony Jay and Jonathan Lynn, "Yes Minister"
Jan 15 '08 #4
Gotch@ wrote, On 15/01/08 17:17:
The symlink is not seen by Windows file access routines... I'll try to
just rename the folder... hope this wuoldn't break up anything...
<snip>

This is not topical here for two reasons
1) You state you are using C++, that is not the language we discuss here
2) Your problem is with your tools rather than the language.

I'm sure there are Eclipse mailing lists, I suggest you try checking
them out, finding the correct one, and asking there. Or possibly on the
gcc, Cygwin or GTK mailing lists, as your problem might be with those
rather than Eclipse itself. However *check* what is topical before
posting your question somewhere else.
--
Flash Gordon
Jan 15 '08 #5
jacob navia <ja***@nospam.comwrites:
Flash Gordon wrote:
>Gotch@ wrote, On 15/01/08 17:17:
>>The symlink is not seen by Windows file access routines... I'll try to
just rename the folder... hope this wuoldn't break up anything...

<snip>

This is not topical here for two reasons
1) You state you are using C++, that is not the language we discuss here
2) Your problem is with your tools rather than the language.

I'm sure there are Eclipse mailing lists, I suggest you try checking
them out, finding the correct one, and asking there. Or possibly on
the gcc, Cygwin or GTK mailing lists, as your problem might be with
those rather than Eclipse itself. However *check* what is topical
before posting your question somewhere else.

Actually it is a language problem

He added
\include\gtk-2.0 (what is equivalent to calling the compiler
with -I\include\gtk-2.0) but the source code expects
\include\gtk.

Note that when you write
#include <gtk/gtk.h>
the language supposes that directories exist and that there
is a subdirectory "gtk" in the normal system includes
directory.
[...]

The *language* does no such thing; an implementation very likely does.

C99 6.10.2p2:

A preprocessing directive of the form

# include <h-char-sequencenew-line

searches a sequence of implementation-defined places for a header
identified uniquely by the specified sequence between the < and >
delimiters, and causes the replacement of that directive by the
entire contents of the header. How the places are specified or the
header identified is implementation-defined.

Note the lack of any mention of directories or subdirectories, or of
any implication that '/' is a directory path delimiter.

Even if you think this is nitpicking, that it's obvious that <gtk/...>
must refer to a directory named "gtk", it's not at all obvious what
the proper solution is. I doubt that either creating a symlink or
renaming the folder is the right approach.

<OT>

You wrote:

You addedd the path to
/usr/include/gtk-2.0 BUT the code expects
/usr/include/gtk

Try to make a symbolic link of gtk-2.0 to gtk

But in fact, on my Cygwin installation the header file the OP is
looking for is at /usr/include/gtk-2.0/gtk/gtk.h (note that "gtk" is a
subdirectory of "gtk-2.0"().

My best guess is that the problem is a confusion between Windows and
Cygwin paths (the directory "/usr/include/gtk-2.0" as seen from Cygwin
might be called, for example, "C:\cygwin\usr\include\gtk-2.0" as seen
from Windows). If that's the problem, a Cygwin mailing list would
be the best place to ask about it.

</OT>

--
Keith Thompson (The_Other_Keith) <ks***@mib.org>
Nokia
"We must do something. This is something. Therefore, we must do this."
-- Antony Jay and Jonathan Lynn, "Yes Minister"
Jan 15 '08 #6
CJ wrote:
On 15 Jan 2008 at 20:51, jacob navia wrote:
>How many times I have misspelled a variable and couldn't
find the error?

Perhaps you should switch to a compiler that issues a useful diagnostic
message for undeclared variables?
If the variable wasn't defined. The *real* problem is when you
have some variable that *is* defined but it is not the one
you want.

--
jacob navia
jacob at jacob point remcomp point fr
logiciels/informatique
http://www.cs.virginia.edu/~lcc-win32
Jan 15 '08 #7
CJ
On 15 Jan 2008 at 20:51, jacob navia wrote:
How many times I have misspelled a variable and couldn't
find the error?
Perhaps you should switch to a compiler that issues a useful diagnostic
message for undeclared variables?

Jan 15 '08 #8
Flash Gordon wrote:
Gotch@ wrote, On 15/01/08 17:17:
>The symlink is not seen by Windows file access routines... I'll try to
just rename the folder... hope this wuoldn't break up anything...

<snip>

This is not topical here for two reasons
1) You state you are using C++, that is not the language we discuss here
2) Your problem is with your tools rather than the language.

I'm sure there are Eclipse mailing lists, I suggest you try checking
them out, finding the correct one, and asking there. Or possibly on the
gcc, Cygwin or GTK mailing lists, as your problem might be with those
rather than Eclipse itself. However *check* what is topical before
posting your question somewhere else.
Actually it is a language problem

He added
\include\gtk-2.0 (what is equivalent to calling the compiler
with -I\include\gtk-2.0) but the source code expects
\include\gtk.

Note that when you write
#include <gtk/gtk.h>
the language supposes that directories exist and that there
is a subdirectory "gtk" in the normal system includes
directory. The user had a problem with the spelling of the path, not
with Eclipse/C++/whatever

I expect that in a group about C we can give people a hand
spotting those errors that are trivial, but somehow our
brain refuses to see.

How many times I have misspelled a variable and couldn't
find the error?
--
jacob navia
jacob at jacob point remcomp point fr
logiciels/informatique
http://www.cs.virginia.edu/~lcc-win32
Jan 15 '08 #9
On Tue, 15 Jan 2008 22:07:18 +0100, jacob navia wrote:
CJ wrote:
>On 15 Jan 2008 at 20:51, jacob navia wrote:
>>How many times I have misspelled a variable and couldn't
find the error?

Perhaps you should switch to a compiler that issues a useful diagnostic
message for undeclared variables?

If the variable wasn't defined. The *real* problem is when you
have some variable that *is* defined but it is not the one
you want.

I'd tend to think that if you're encountering this, your choice of
variable names is perhaps more at fault than anything, no?
Jan 16 '08 #10
On Jan 15, 8:27*am, "Gotch@" <dario...@gmail.comwrote:
Hi all,
I've installed the CDT plugin for Eclipse and I want to use it to work
on C/C++ projects under Cygwin. It works, in fact it compiles and runs
the usual helloworld c++ program. Now it comes difficult when I try to
add external libs. Such as... GTK. Let's explain what I tried. (oh
well, I'm using Eclipse Europa 3.3.1 and CDT 4.0.1). First I just
added the path of the cygwin includes throug the project->properties->C/C++ General->Paths and Symbols window. I added in Includes under

GNU C the path to the gtk-2.0 includes in cygwin/usr/include/gtk-2.0
folder. No effect. It says that it couldn't find gtk/gtk.h . So, since
it's a C++ project, I tried to add them under GNU C++. As a result the
compiler starts putting out messages about every header in the library
compelling that ISO C forbids this and that...
Let's note that my include is
#include <gtk/gtk.hbut i get the same results with <gtk.hand "gtk/
gtk.h".

I don't get it, but I'd like to use eclipse to devlop in C/C++ because
of positive Java experiences.

Do you have any ideas, most tutorials on the topic are outdated and
the old CDT is quite different, especially regarding the project
types.
find out product of two matrix
Jan 24 '08 #11

This thread has been closed and replies have been disabled. Please start a new discussion.

Similar topics

22
by: TuPLaD | last post by:
Hello, I just made a little C++ console application: #include "iostream" using namespace std; int main () { cout << "Hello Mars !"; return 0;
3
by: David Komanek | last post by:
Hi all, I am trying to learn more about how to use g++/Cygwin to produce dll files on WinXP. And I have a problem which at the first look seems to be an obvious dll-export problem, but I don't...
1
by: Brian Hall | last post by:
I have both mingw and cygwin on a Windows machine. I have installed Eclipse, with the CDT, and written a 'Hello World' test program. I would like Eclipse to use the mingw complier but looking...
52
by: lcw1964 | last post by:
Greetings, all, I am trying to port a little bit of math code to gcc, that in the original version used the long double version of several functions (in particular, atanl, fabsl, and expl). I...
1
by: douglas.nospam | last post by:
I've googled this problem and can't seem to find an answer. I get the error below when linking an executable which I am trying to port from Linux to Cygwin/XP. I'm not sure how to attack...
0
by: Husey | last post by:
Hi, I am trying to create a very simple EJB project which requires me to create a new jboss configuration in Eclipse. I keep getting the error message "An error has occurred. See error log for...
5
by: PG | last post by:
I am trying to compile a simple ODBC and C example on Windows XP SP2. I have Cygwin_NT 5.1. This is the code (obtained from...
1
by: Horacius ReX | last post by:
Hi, I am starting to use eclipse cdt and compile an old application without problems. But can not run it, because I need to increase the stack size. In linux I do it through the operating...
0
by: Charles Arthur | last post by:
How do i turn on java script on a villaon, callus and itel keypad mobile phone
0
by: emmanuelkatto | last post by:
Hi All, I am Emmanuel katto from Uganda. I want to ask what challenges you've faced while migrating a website to cloud. Please let me know. Thanks! Emmanuel
0
BarryA
by: BarryA | last post by:
What are the essential steps and strategies outlined in the Data Structures and Algorithms (DSA) roadmap for aspiring data scientists? How can individuals effectively utilize this roadmap to progress...
1
by: Sonnysonu | last post by:
This is the data of csv file 1 2 3 1 2 3 1 2 3 1 2 3 2 3 2 3 3 the lengths should be different i have to store the data by column-wise with in the specific length. suppose the i have to...
0
by: Hystou | last post by:
There are some requirements for setting up RAID: 1. The motherboard and BIOS support RAID configuration. 2. The motherboard has 2 or more available SATA protocol SSD/HDD slots (including MSATA, M.2...
0
Oralloy
by: Oralloy | last post by:
Hello folks, I am unable to find appropriate documentation on the type promotion of bit-fields when using the generalised comparison operator "<=>". The problem is that using the GNU compilers,...
0
jinu1996
by: jinu1996 | last post by:
In today's digital age, having a compelling online presence is paramount for businesses aiming to thrive in a competitive landscape. At the heart of this digital strategy lies an intricately woven...
0
agi2029
by: agi2029 | last post by:
Let's talk about the concept of autonomous AI software engineers and no-code agents. These AIs are designed to manage the entire lifecycle of a software development project—planning, coding, testing,...
0
isladogs
by: isladogs | last post by:
The next Access Europe User Group meeting will be on Wednesday 1 May 2024 starting at 18:00 UK time (6PM UTC+1) and finishing by 19:30 (7.30PM). In this session, we are pleased to welcome a new...

By using Bytes.com and it's services, you agree to our Privacy Policy and Terms of Use.

To disable or enable advertisements and analytics tracking please visit the manage ads & tracking page.