Configure breaks by build

[Sascha Manns]

Hello list,

i'm preparing some autotools files for my new project.

I have in my configure.ac:

GDK30_MINIMUM_VERSION=2.99.0
GTK30_MINIMUM_VERSION=2.99.0
ATK_MINIMUM_VERSION=2.99.0

PKG_CHECK_MODULES(gdk-3.0 >= $GDK30_MINIMUM_VERSION
                  gtk+-3.0 >= $GTK30_MINIMUM_VERSION
                  atk >= $ATK_MINIMUM_VERSION)

After running the autogen.sh i'm getting:

configure.ac:48: error: AC_SUBST: `gdk-3.0 >= $GDK30_MINIMUM_VERSION 
                  gtk+-3.0 >= $GTK30_MINIMUM_VERSION
                  atk >= $ATK_MINIMUM_VERSION_CFLAGS' is not a valid
shell variable name

But what to do now?

Greetings
Sascha

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