Troubles compiling in GPS (Ada IDE) with glib.h - ada

Question

i'm having some troubles when trying to compile Ada code in GPS. GPS says is missing when I include it on a package. I tried installing with apt-get, and it does, but the error is still there. What can I do next? I'm running GPS on a x64 Ubuntu 12.04.
Here's the error message I got:
gprbuild -d -P/media/LUISMUNYOZ/QUINTO/str/pendulum/pendulum_portatil/pendulum.gpr
-XEXTRA=True -XOPENGL=True -XGNOME=True -XBUILD=Production
print_barrier_sync.adb contrib.gpr:1:09: warning: no compiler specified for language "Xml",
ignoring all its sources x86_64-pc-linux-gnu-gcc -c lw.c In file included from
/media/LUISMUNYOZ/QUINTO/str/pendulum/pendulum_portatil/gtkada/testgtk/opengl/lw.c:20:0:
/media/LUISMUNYOZ/QUINTO/str/pendulum/pendulum_portatil/gtkada/testgtk/opengl/lw.h:23:18:
fatal error: glib.h: No such file or directory compilation terminated.
gprbuild:* compilation phase failed
[2012-11-21 13:24:47] process exited with status 4 (elapsed time: 02.06s) [2012-11-21 13:24:56]
Could not locate executable on path: svn SVN error:
[…]
The error triggers at this point:
#ifndef LW_H
#define LW_H
#include <glib.h> <------------------------------------------
#include <GL/gl.h>
#define LW_MAX_POINTS 200
#define LW_MAX_NAME_LEN 500
The file is lw.h, which is defined in the package GtkAda. I downloaded it from GPS page.

Answer 1

I'd pursue #Simon's approach, but a work-around based on 2.4.2. Using the command line might be a temporary alternative while you sort out the underlying problem.
As you are using linux, here's a Makefile for the basic Interaction demo.
# Make shared, static or debug targets.
OS := $(shell uname)
OBJ = obj
TARGET = interaction
GNATMAKE = gnatmake -D $(OBJ)
CARGS = -cargs -O3 -gnatp -gnatwu -gnatf
BARGS = -bargs
LARGS = -largs
.PHONEY: clean cleaner cleanest
all:
#echo ""
#echo "Build targets:"
#echo ""
#echo " shared Use the shared Ada libraries."
#echo " static Link the Ada libraries statically."
#echo " debug Enable debugging."
#echo ""
#echo "Support targets:"
#echo ""
#echo " clean Remove *.ali *.o b~.*"
#echo " cleaner Remove target, too."
#echo " cleanest Remove build directory, too."
#echo ""
shared: $(OBJ)
shared: INCLUDE = $(shell gtkada-config --cflags)
shared: BARGS += -shared
shared: LARGS += $(shell gtkada-config --libs)
shared: LARGS += -dead_strip
shared: *.ad[sb]
#echo "building with shared libraries:"
$(GNATMAKE) $(TARGET) $(INCLUDE) $(CARGS) $(BARGS) $(LARGS)
static: $(OBJ)
static: INCLUDE = $(shell gtkada-config --static --cflags)
static: BARGS += -static
static: LARGS += $(shell gtkada-config --static --libs)
static: LARGS += -dead_strip
static: *.ad[sb]
$(GNATMAKE) $(TARGET) $(INCLUDE) $(CARGS) $(BARGS) $(LARGS)
debug: $(OBJ)
debug: INCLUDE = $(shell gtkada-config --static --cflags)
debug: BARGS += -static
debug: LARGS += $(shell gtkada-config --static --libs)
debug: *.ad[sb]
$(GNATMAKE) -g $(TARGET) $(INCLUDE) $(LARGS)
$(OBJ):
mkdir $(OBJ)
clean:
${RM} $(OBJ)/* b~*
cleaner: clean
${RM} $(TARGET)
cleanest: cleaner
${RM} -r $(OBJ)
For reference, these packages were installed on Ubuntu 12.04:
$ dpkg --get-selections | egrep "gnat|gtkada"
gnat install
gnat-4.6 install
gnat-4.6-base install
gnat-gps install
gnat-gps-common install
gnat-gps-doc install
libgnat-4.6 install
libgnatprj4.6 install
libgnatvsn4.6 install
libgtkada-bin install
libgtkada2.24.1 install
libgtkada2.24.1-dev install

Answer 2

I've never used GtkAda. However ... I googled glib.h and got many hits, suggesting that for plain C builds one should use - for example, from this StackOverflow question -
# 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
$(CC) $(CFLAGS) $< -o $# $(LDFLAGS)
However, we're talking gprbuild here, so perhaps the GtkAda documentation is relevant? It says you need to include with "gtkada"; in your GNAT Project file, and include the location of gtkada.gpr on your ADA_PROJECT_PATH if it isn't there already (see the output of gnatls -v).
If you've already done that, please show us the GPR file.