1.1 --- a/m4/lx_check_glpk.m4	Tue Dec 02 21:40:33 2008 +0100
     1.2 +++ b/m4/lx_check_glpk.m4	Tue Dec 02 22:48:28 2008 +0100
     1.3 @@ -42,6 +42,11 @@
     1.4        #include <glpk.h>
     1.5        }
     1.6  
     1.7 +      #if (GLP_MAJOR_VERSION < 4) \
     1.8 +         || (GLP_MAJOR_VERSION == 4 && GLP_MINOR_VERSION < 33)
     1.9 +      #error Supported GLPK versions: 4.33 or above
    1.10 +      #endif
    1.11 +
    1.12        int main(int argc, char** argv)
    1.13        {
    1.14          LPX *lp;