smsd compilig problem

[Nico]

I've compiled and installed gnokii (0.5.2 under Linux) and all works fine.
But when I try to compile smsd this is the result:

gcc -g -O2  -I../include -DMODULES_DIR=\"/usr/lib/smsd\" -D_REENTRANT
`glib-config --cflags`   -c -o smsd.o smsd.c
gcc -g -O2  -I../include -DMODULES_DIR=\"/usr/lib/smsd\" -D_REENTRANT
`glib-config --cflags`   -c -o smsd.o smsd.c
/bin/sh: line 1: glib-config: command not found
smsd.c:49:18: glib.h: No such file or directory
In file included from smsd.c:54:
smsd.h:33:18: glib.h: No such file or directory
In file included from smsd.c:54:
smsd.h:41: error: parse error before "gchar"
[...]
smsd.c: In function `Run':
smsd.c:474: error: `DB_ConnectInbox' undeclared (first use in this function)
smsd.c:477: error: `TRUE' undeclared (first use in this function)
make: *** [smsd.o] Error 1


It seems that glib-devel is missing, but I've installed:
glib-2.0.6
glib-devel-2.0.6
glibc-2.3.2
glibc-devel-2.3.2
glibc-locales-2.3.2
glibc-profile-2.3.2

So, what could be the problem?
Thank for your help.
Nico