[hsa2@difuzyon gnome-gmail-notifier-0.9.4]$ ./configure --prefix=/usr
checking for gcc... gcc
checking for C compiler default output file name... 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 for gcc option to accept ISO C89... none needed
checking for a BSD-compatible install... /bin/install -c
checking for intltool >= 0.35.0... 0.35.5 found
checking for perl... /usr/bin/perl
checking for XML::Parser... ok
checking for iconv... /usr/bin/iconv
checking for msgfmt... /usr/bin/msgfmt
checking for msgmerge... /usr/bin/msgmerge
checking for xgettext... /usr/bin/xgettext
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 whether build environment is sane... yes
checking for gawk... gawk
checking whether make sets $(MAKE)... yes
checking for style of include used by make... GNU
checking dependency style of gcc... gcc3
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 build system type... i686-pc-linux-gnu
checking host system type... i686-pc-linux-gnu
checking locale.h usability... yes
checking locale.h presence... yes
checking for locale.h... yes
checking for LC_MESSAGES... yes
checking libintl.h usability... yes
checking libintl.h presence... yes
checking for libintl.h... yes
checking for ngettext in libc... yes
checking for dgettext in libc... yes
checking for bind_textdomain_codeset... yes
checking for msgfmt... /usr/bin/msgfmt
checking for dcgettext... yes
checking if msgfmt accepts -c... yes
checking for gmsgfmt... /usr/bin/msgfmt
checking for xgettext... /usr/bin/xgettext
checking for pkg-config... /usr/bin/pkg-config
checking pkg-config is at least version 0.9.0... yes
checking for glib... yes
checking for libnotify... yes
checking for gnome... yes
checking for libsoup... configure: error: Package requirements (libsoup-2.2 >= 2.2.0) were not met:

No package 'libsoup-2.2' found

Consider adjusting the PKG_CONFIG_PATH environment variable if you
installed software in a non-standard prefix.

Alternatively, you may set the environment variables libsoup_CFLAGS
and libsoup_LIBS to avoid the need to call pkg-config.
See the pkg-config man page for more details.