In the code from http://groups.google.fr/group/comp.lang.fortran/browse_thread/thread/120303aae031b672/7dd83bc30a9f19a3#7dd83bc30a9f19a3
gfortran detect the problems coming from the undefined 'j', but not the fact that 'df4_dxi' is used before it is defined. Am I missing a relevant option or is it a missing feature/bug in gfortran/gcc? -- Summary: Undetected "use before definition". Product: gcc Version: 4.3.0 Status: UNCONFIRMED Severity: enhancement Priority: P3 Component: fortran AssignedTo: unassigned at gcc dot gnu dot org ReportedBy: dominiq at lps dot ens dot fr http://gcc.gnu.org/bugzilla/show_bug.cgi?id=35234