Node: C Access to Type Information, Next: f2c Skeletons and Prototypes, Previous: C Interfacing Tools, Up: Interoperating with C and C++
Generally, C code written to link with
g77 code--calling and/or being
called from Fortran--should #include <g2c.h> to define the C
versions of the Fortran types.
Don't assume Fortran INTEGER types
correspond to C ints, for instance; instead, declare them as
integer, a type defined by g2c.h.
g2c.h is installed where gcc will find it by
default, assuming you use a copy of gcc compatible with
g77, probably built at the same time as g77.