-AC_CHECK_LIB(gslcblas,main,,AC_MSG_ERROR([You must install libgslcblas development libraries]))
-AC_CHECK_LIB(gsl, gsl_cdf_chisq_Q,,
- AC_MSG_ERROR([You must install development libraries for libgsl version 1.4 or later]))
+AC_CHECK_LIB(gslcblas,main,,[PSPP_REQUIRED_PREREQ([libgslcblas])])
+AC_CHECK_LIB(gsl, gsl_cdf_chisq_Q,,[PSPP_REQUIRED_PREREQ([libgsl (version 1.4 or later)])])