http://gcc.gnu.org/bugzilla/show_bug.cgi?id=50933
Bug #: 50933 Summary: Wrongly regards BIND(C) types as incompatible Classification: Unclassified Product: gcc Version: 4.7.0 Status: UNCONFIRMED Keywords: rejects-valid Severity: normal Priority: P3 Component: fortran AssignedTo: unassig...@gcc.gnu.org ReportedBy: bur...@gcc.gnu.org gfortran fails to compile the program below. I think the program is valid as the derived type uses BIND(C). Works if one uses SEQUENCE instead of BIND(C) Taken from http://groups.google.com/group/comp.lang.fortran/browse_thread/thread/887251d8cd64eb02 (Richard Maine's example). For some reason, only the part of the issues raised in the thread were fixed in PR 45211; cf. also PR 37829. gfortran compilation fails with: write (*,*) liter_cb(link_info) 1 Error: Type mismatch in argument 'link_info' at (1); passed TYPE(info_t) to TYPE(info_t) MODULE liter_cb_mod USE ISO_C_BINDING CONTAINS FUNCTION liter_cb(link_info) bind(C) USE ISO_C_BINDING IMPLICIT NONE INTEGER(c_int) liter_cb TYPE, bind(C) :: info_t INTEGER(c_int) :: type END TYPE info_t TYPE(info_t) :: link_info liter_cb = 0 END FUNCTION liter_cb END MODULE liter_cb_mod PROGRAM main USE ISO_C_BINDING interface FUNCTION liter_cb(link_info) bind(C) USE ISO_C_BINDING IMPLICIT NONE INTEGER(c_int) liter_cb TYPE, bind(C) :: info_t INTEGER(c_int) :: type END TYPE info_t TYPE(info_t) :: link_info END FUNCTION liter_cb end interface TYPE, bind(C) :: info_t INTEGER(c_int) :: type END TYPE info_t type(info_t) :: link_info write (*,*) liter_cb(link_info) END PROGRAM main