Re: FFT

Bonjour,
J'ai essayé d'installer FFT-spectra (qui m'a l'air pas mal !), mais j'obtient cela :
[root@localhost fft-spectra-1.3]# ./configure
checking for a BSD-compatible install... /usr/bin/install -c
checking whether build environment is sane... yes
checking for gawk... gawk
checking whether make sets ${MAKE}... yes
checking whether to enable maintainer-specific portions of Makefiles...no
checking for style of include used by make... GNU
checking for gcc... gcc
checking for C compiler default output... a.out
checking whether the C compiler works... yes
checking whether we are cross compiling... no
checking for suffix of executables...
checking for suffix of object files... o
checking whether we are using the GNU C compiler... yes
checking whether gcc accepts -g... yes
checking dependency style of gcc... gcc3
checking for strerror in -lcposix... no
checking for gcc... (cached) gcc
checking whether we are using the GNU C compiler... (cached) yes
checking whether gcc accepts -g... (cached) yes
checking dependency style of gcc... (cached) gcc3
checking for gcc option to accept ANSI C... none needed
checking how to run the C preprocessor... gcc -E
checking for ANSI C header files... yes
checking for pkg-config... /usr/bin/pkg-config
checking for gtk+-2.0 >= 2.0.0... Package gtk+-2.0 was not found in thepkg-config search path. Perhaps you should add the directory containing`gtk+-2.0.pc' to the PKG_CONFIG_PATH environment variable No package 'gtk+-2.0' found
configure: error: Library requirements (gtk+-2.0 >= 2.0.0) not met; consider adjusting the PKG_CONFIG_PATH environment variable if your libraries are in a nonstandard prefix so pkg-config can find them.
Le problème est que gtk+2.0 est installé.
Une solution ?
Merci.