安装audacious-plugins插件，但编译安装时报错，提示找不到安装的audacious

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安装audacious-plugins插件，但编译安装时报错，提示找不到安装的audacious，信息如下：
[root@xzdd-68 audacious]# cd audacious-plugins-2.5.1
[root@xzdd-68 audacious-plugins-2.5.1]# ./configure
checking build system type... i686-pc-linux-gnu
checking host system type... i686-pc-linux-gnu
checking target system type... i686-pc-linux-gnu
checking for gcc... gcc
checking whether the C compiler works... yes
checking for C compiler default output file name... a.out
checking for suffix of executables...  
checking whether we are cross compiling... no
checking for suffix of object files... o
checking whether we are using the GNU C compiler... yes
checking whether gcc accepts -g... yes
checking for gcc option to accept ISO C89... none needed
checking for g++... g++
checking whether we are using the GNU C++ compiler... yes
checking whether g++ accepts -g... yes
checking for library containing strerror... none required
checking how to run the C preprocessor... gcc -E
checking for grep that handles long lines and -e... /bin/grep
checking for egrep... /bin/grep -E
checking for ANSI C header files... yes
checking for sys/types.h... yes
checking for sys/stat.h... yes
checking for stdlib.h... yes
checking for string.h... yes
checking for memory.h... yes
checking for strings.h... yes
checking for inttypes.h... yes
checking for stdint.h... yes
checking for unistd.h... yes
checking whether byte ordering is bigendian... no
checking for gcc... gcc
checking version of gcc... 4.5.1, ok
checking for style of include used by make... GNU
checking dependency style of gcc... none
checking whether ln -s works... yes
checking whether make sets $(MAKE)... yes
checking for rm... /bin/rm
checking for mv... /bin/mv
checking for cp... /bin/cp
checking for ar... /usr/bin/ar
checking for tr... /usr/bin/tr
checking for ranlib... /usr/bin/ranlib
checking for a BSD-compatible install... /usr/bin/install -c
checking for a thread-safe mkdir -p... /bin/mkdir -p
checking whether NLS is requested... yes
checking for msgfmt... /usr/bin/msgfmt
checking for gmsgfmt... /usr/bin/msgfmt
checking for xgettext... /usr/bin/xgettext
checking for msgmerge... /usr/bin/msgmerge
checking for ld used by GCC... /usr/bin/ld
checking if the linker (/usr/bin/ld) is GNU ld... yes
checking for shared library run path origin... done
checking for CFPreferencesCopyAppValue... no
checking for CFLocaleCopyCurrent... no
checking for GNU gettext in libc... yes
checking whether to use NLS... yes
checking where the gettext function comes from... libc
checking for fcntl... yes
checking for fsync... yes
checking for mkdtemp... yes
checking for strnlen... yes
checking for strtoul... yes
checking for pkg-config... /usr/bin/pkg-config
checking pkg-config is at least version 0.9.0... yes
checking for AUDACIOUS... no
configure: error: Cannot find Audacious 2.5 or later, have you installed audacious yet?
求教，请问这到底是为什么？怎么排除？