My problem seems quite simple: I would like to be able to create a simple program with a simple GUI for windows in C (and if possible on windows).
My current environment is eclipse IDE, msys2 with mingw64 toolchain all on windows 10.
I would like to use pkg-config with eclipse to avoid "hard-coding" all my libraries, and for that I first tried the pkg-config plugin for eclipse (it crashes when I create a new project, null pointer exception). I then tried to insert the pkg-config command inside the call to GCC. For that I had to use powershell because cmd do not allow it.
But even on powershell, i'm not able to use it because the string that pkg-config returns me is considered by gcc as a command.
Here is what eclipse uses to compile:
powershell gcc -O0 -g3 -Wall -c -fmessage-length=0 --std=c99 $(pkg-config-win --cflags --libs gtk+-3.0) -o main.o "..\\main.c"
And here is what it returns me:
gcc.exe: error: unrecognized command line option '-mms-bitfields -pthread -mms-bitfields -IC:/msys64/mingw64/include/gtk-3.0 [...]'
I then tried to remove the --cflags of pkg-config:
Command used by eclipse:
powershell gcc $(pkg-config-win --libs gtk+-3.0) -o Test.exe main.o -lgtk-3 -lgdk-3 -lgdi32 -limm32 -lshell32 -lole32 -lwinmm -ldwmapi -lz -lpangowin32-1.0 -lpangocairo-1.0 -lpango-1.0 -latk-1.0 -lcairo-gobject -lcairo -lgdk_pixbuf-2.0 -lgio-2.0 -lgobject-2.0 -lglib-2.0 -lintl
And here is the result (8 times the same line).
gcc.exe: error: .0: No such file or directory
I tried dozens of different things but none of them works.
So my main questions are:
Is there a simple way to solve this problem?
Do I do the right things (is eclipse made to be able to do such things?)
If not, what should I do? (Change IDE? Change GUI library, ...)
I hope that you will be able to help me, I am very open about the possibilities that you might give. Please excuse me if I was unclear on some points or do not give enough informations, I will reply as soon as possible to your questions :p
So my main questions are:
1.Is there a simple way to solve this problem?
Yes,
While this is an old question, it deserves an answer. The problem as correctly noted in the comments is the output of $(pkg-config-win --cflags --libs gtk+-3.0) is returned as one long string and gcc doesn't recognize it. To solve the problem you can simply assign the output of pkg-config as an array and use the array variable with gcc, e.g.
PS> [string[]] $cflags = $(pkg-config-win --cflags --libs gtk+-3.0)
PS> gcc -O0 -g3 -Wall -c -fmessage-length=0 --std=c99 $cflags -o main.o ..\main.c
gcc will then see each option contained in $cflags as an individual argument (an quoting is automatically handled so embedded '-' and '.' do not cause problems in powershell)
Related
I have recently changed distribution (linux to mac).
Since I have a problem with my Makefile for a project.
Fatal error: <SDL/SDL.h> file not found
When I write the paths of the SDL in absolute directly in my .h it works.
But with the Makefile no, I do not understand why.
GRAPH_FLAGS + = -I/usr/local/include -L/usr/local/lib -lncurses -lSDLmain -lSDL -lSDL_image
$(GRAPH_NAME): $(GRAPH_OBJS)
$(CC) -o $(GRAPH_NAME) $(GRAPH_OBJS) $(GRAPH_FLAGS)
Use pkg-config to get the correct include path:
GRAPH_FLAGS += `pkg-config --cflags sdl2` `pkg-config --libs sdl2` -lncurses ...
Thanks for your answers, I found the solution.
It's all stupid, my makefile does not understand the GRAPH_FLAGS.
I have changed by the basic CFLAGS, I don't know if it comes from the version of my Make but it remains very mystical.
I managed to arrange my makefile because it compiles several programs.
I also went to the SDL2 as it was advised.
I'm trying to use in one of my projects. I'm working on a Mac, have gotten MacPorts with pkg-config and glib-2.0 packages.
When I try to make a file containing an include to above path, I get the following error (line above it is for clarity that it does actually give me the right dirs):
$ pkg-config --cflags --libs glib-2.0
-I/opt/local/lib/glib-2.0/include -I/opt/local/include -L/opt/local/lib -lglib-2.0 -lintl
$ make
gcc hash-glib.c -c `pkg-config --cflags --libs glib-2.0` -std=c99 -Wall -Wextra -pedantic -O2
hash-glib.c:2:23: error: glib/glib.h: No such file or directory
$
Presumably, you've run:
ls -l /opt/local/lib/glib-2.0/include/glib/glib.h \
/opt/local/include/glib/glib.h
to demonstrate that the header #include "glib/glib.h" actually is present in one of the locations where you've been told by pkg-config that it could be found. If it isn't there, then pkg-config is misleading you, and the compiler is telling you that you've been hoodwinked.
Since the compiler will have done its utmost to find the header, it is a reasonable bet that the file isn't in either of those locations. You are then left with detective work: where is the glib.h header installed?
find /opt/local -type f -name glib.h
If that tells you where it is, you can then work out what pkg-config should be saying. If that fails to find it, widen the search area. If you still can't find it, maybe it isn't installed yet? Or you only installed the glib runtime, not the development package.
Hi everyone I have a program with the following includes:
gtk/gtk.h
glib.h
I have used the commands:
sudo apt-get install libgtk2.0-dev glib
sudo apt-get install glade
But I am still getting the error that glib was not found and gtk/gtk.h was not found. It's the first time I am using gtk and I have no idea how it works or how to install it.
The command you're supposed to use (in more recent releases of linux/gtk) is pkg-config, not gtk-config. gtk-config is intended for pre 2.0 gtk development.
Consider the file you're compiling is called foo.c, to compile it under gtk-2.0, you would use, from the command line the command:
gcc `pkg-config --cflags glib-2.0 gtk+-2.0` foo.c -o foo `pkg-config --libs glib-2.0 gtk+-2.0`
This should compile, and give you a file foo, that can be executed.
but really, use a makefile, as this stuff is a pain to keep typing. I would write out a sample makefile, but there are rules that need to be followed in the formatting of them that makes it difficult to type in the editor window.
# Sample Makefile
CFLAGS := $(shell pkg-config --cflags glib-2.0 gtk+-2.0)
LDFLAGS := $(shell pkg-config --libs glib-2.0 gtk+-2.0)
foo: foo.c
<TAB HERE NOT SPACES>$(CC) $(CFLAGS) $< -o $# $(LDFLAGS)
This defines a simple rule saying to make foo, it depends on foo.c, so of foo.c is newer than foo, it will be rebuilt. Where I write 'TAB HERE NOT SPACES' it must be a tab character, and cannot be a set of space characters.
type "locate glib.h" to determine file's location (assuming a contemporary linux distribution - your post doesn't provide much information).
Then ensure the path to glib.h is properly specified in your Makefile. (You do have a Makefile, don't you?) Perform the same steps for gtk.h.
Please read the official documentation. It explains how to compile GTK applications.
Basically to compile a hello.c file to generate a hello program, you'll type:
gcc `pkg-config --cflags --libs gtk+-2.0` hello.c -o hello
So here's the world's simplest glib program:
#include <glib.h>
I try to compile it with gcc test.c and I get:
test.c:1:18: error: glib.h: No such file or directory
So I make sure that I have the right packages:
# dpkg -l | grep libglib
ii libglib-perl 1:1.183-1 Perl interface to the GLib and GObject libra
ii libglib1.2-dev 1.2.10-19build1 The GLib library of C routines (development)
ii libglib1.2ldbl 1.2.10-19build1 The GLib library of C routines
ii libglib2.0-0 2.20.1-0ubuntu2 The GLib library of C routines
ii libglib2.0-cil 2.12.1-1ubuntu2 CLI binding for the GLib utility library 2.1
ii libglib2.0-data 2.18.2-0ubuntu2 Common files for GLib library
ii libglib2.0-dev 2.20.1-0ubuntu2 Development files for the GLib library
ii libglibmm-2.4-1c2a 2.18.1-1 C++ wrapper for the GLib toolkit (shared lib
Then I search for any "glib.h" anywhere under /usr/include. I get two, /usr/include/glib-1.2/glib.h and /usr/include/glib-2.0/glib.h. So I try:
$ gcc -I/usr/include/glib-2.0 -Wall test.c
In file included from /usr/include/glib-2.0/glib/galloca.h:34,
from /usr/include/glib-2.0/glib.h:32,
from test.c:2:
/usr/include/glib-2.0/glib/gtypes.h:34:24: error: glibconfig.h: No such file or directory
(about 10,000 more errors snipped)
I don't seem to have a glibconfig.h anywhere on my computer.
What do I do now?
glib tends to hide itself... Your include statement doesn't work because GCC doesn't automatically search subdirectories, and so cannot see the glib.h in glib-1.2 or glib-2.0.
Read the Compiling GLib Applications page in the GLIB manuals... you use commands like pkg-config --cflags glib-2.0 to get the right flags for GCC.
The canonical way to do what you are trying is
% gcc test.c -Wall -o test `pkg-config --cflags --libs glib-2.0`
Note the back-ticks, which tell the shell to run the pkg-config command "in-place".
> > The canonical way to do what you are trying is
> % gcc test.c -Wall -o test `pkg-config --cflags --libs glib-2.0`
Sorry, but no. That is a common misconception, that just happens to work in most cases on ELF-based systems, Linux in particular. The canonical way is to pass in the cflags and libraries separately, in the correct and traditional locations on the command line, like this:
gcc -Wall -o test `pkg-config --cflags glib-2.0` test.c `pkg-config --libs glib-2.0`
It is a pity that pkg-config accepts both the --cflags and --libs options at the same time, as it means this incorrect meme will never die, and people used to it on Linux will continue to be baffled when they then try the same on other platforms.
As #chris said use pkg-config.
glibconfig.h is missing
it’s because this file is not in the /usr/include/glib-2.0, but in /usr/lib/glib-2.0. So you have to include also this /usr/lib path or copy the file to the /include/glib-2.0
I am using glib.h as well-
Do this to compile all your glib.h programs :)
gcc `pkg-config --cflags --libs glib-2.0` filename.c
Make sure to surround pkg-config --cflags --libs glib-2.0 with back-quotes
which you find under tilde (left most key on the querty keyboard).
Thank me later .. :P
apt-get build-dep is your friend -- nobody can remember all the packages you need to build something.
I'm trying to build a hello world using GTK, which includes the line:
#include <gtk/gtk.h>
as you would expect.
The Makefile supplied has the line:
GTK_INCLUDE = -I/usr/local/include
so it would expect to find gtk.h in /usr/local/include/gtk/gtk.h. However on my system, it is located in /usr/local/include/gtk-2.0/gtk/gtk.h, ie within a version'ed subdirectory.
Obviously in this case I can add -I/usr/local/include/gtk-2.0 to the Makefile, but the same problem crops up with gtk.h's dependencies and so on.
Is there a good way of dealing with this? Could configure be used to locate where the header files are and add the appropriate include directories? I know next to nothing about configure, but it seems to find out things about the system at build time, which is what I am after.
Is this a common occurence or do I have some freak directory structure which is the real problem?
Thanks for any pointers!
You need to use pkg-config to get the include paths:
$ pkg-config --cflags gtk+-2.0
-I/usr/include/gtk-2.0 -I/usr/lib/gtk-2.0/include -I/usr/include/atk-1.0 -I/usr/include/cairo -I/usr/include/pango-1.0 -I/usr/include/glib-2.0 -I/usr/lib/glib-2.0/include -I/usr/include/pixman-1 -I/usr/include/freetype2 -I/usr/include/libpng12
You must also use it to get the libraries:
$ pkg-config --libs gtk+-2.0
-lgtk-x11-2.0 -lgdk-x11-2.0 -latk-1.0 -lpangoft2-1.0 -lgdk_pixbuf-2.0 -lm -lpangocairo-1.0 -lgio-2.0 -lcairo -lpango-1.0 -lfreetype -lz -lfontconfig -lgobject-2.0 -lgmodule-2.0 -lglib-2.0
(The output of these commands will vary depending on your distribution, and will always be the correct ones for your distribution.)
Probably, you must create a symbolic link like:
ln -s /usr/local/include/gtk /usr/local/include/gtk-2.0
but you can first try to reinstall the GTK package.
I haven't used gtk in a long while, but the way this is normally handled in Linux is that there is a script called packagename-config (in this case, probably gtk-config) that comes with the development headers, which your makefile is supposed to call in order to get the proper include paths and linker flags for the package, using --cflags and --libs respectively.
So try something like
GTK_INCLUDE=`gtk-config --cflags`
(note the use of backticks, not apostrophes)
And you probably also want to add the output of gtk-config --libs to your LDFLAGS in order to make sure you are linking against all the right stuff.