In trans-common.c there are two calls to gfc_warning that pass a HOST_WIDE_INT variable and a %d format. The calls in question are in translate_common, where we call gfc_warning with the variable 'offset' and again with the variable 'common_segment->offset'. This will not work when HOST_WIDE_INT is not the same size as int. I tried replacing '%d' in the format with the macro HOST_WIDE_INT_PRINT_DEC, which is defined in gcc/hwint.h but that failed because the routine error_print in gcc/fortran/error.c parses the format string and doesn't understand %ld or %lld.
Test case: real r1(5) common r1 double precision d1 equivalence (d1, r1(2)) end Output during compile: Warning: COMMON '__BLNK__' at (1) requires 1074534272 bytes of padding at start -- Summary: Fortran compiler tries to print HOST_WIDE_INT with %d format Product: gcc Version: 4.0.0 Status: UNCONFIRMED Severity: normal Priority: P2 Component: fortran AssignedTo: unassigned at gcc dot gnu dot org ReportedBy: sje at cup dot hp dot com CC: gcc-bugs at gcc dot gnu dot org http://gcc.gnu.org/bugzilla/show_bug.cgi?id=19387