mirror/autoconf
2
0
Fork 0
mirror of git://git.sv.gnu.org/autoconf synced 2025-03-01 14:16:02 +08:00
Code Issues Packages Projects Releases Wiki Activity

Mention C++ as well as C. In the example, don't #ifdef F77_FUNC

Browse Source 
before using it, as that would push any errors to link-time rather
than compile-time; note that the user can test this to invoke
alternative behavior.
This commit is contained in:
Steven G. Johnson 2001-04-12 02:59:07 +00:00
parent 48ecaeea39
commit 304bc71471
1 changed files with 9 additions and 10 deletions

19
doc/autoconf.texi
View File

@ -4466,9 +4466,9 @@ libraries.
@cvindex F77_FUNC
@cvindex F77_FUNC_
Defines C macros @code{F77_FUNC(name,NAME)} and
@code{F77_FUNC_(name,NAME)} to properly mangle the names of C
identifiers, and C identifiers with underscores, respectively, so that
they match the name mangling scheme used by the Fortran 77 compiler.
@code{F77_FUNC_(name,NAME)} to properly mangle the names of C/C++
identifiers, and identifiers with underscores, respectively, so that
they match the name-mangling scheme used by the Fortran 77 compiler.
Fortran 77 is case-insensitive, and in order to achieve this the Fortran
77 compiler converts all identifiers into a canonical case and format.
@ -4487,12 +4487,10 @@ Fortran 77 subroutine:
end
@end example
You would then declare its prototype in C as:
You would then declare its prototype in C or C++ as:
@example
#ifdef F77_FUNC
# define FOOBAR_F77 F77_FUNC(foobar,FOOBAR)
#endif
#define FOOBAR_F77 F77_FUNC(foobar,FOOBAR)
#ifdef __cplusplus
extern "C" /* prevent C++ name mangling */
#endif
@ -4507,9 +4505,10 @@ Automake}).
Although Autoconf tries to be intelligent about detecting the
name-mangling scheme of the Fortran 77 compiler, there may be Fortran 77
compilers that it doesn't support yet. It is therefore recommended that
you test whether the @code{F77_FUNC} and @code{F77_FUNC_} macros are
defined, as we have done in the example above.
compilers that it doesn't support yet. In this case, the above code
will generate a compile-time error, but some other behavior
(e.g. disabling Fortran-related features) can be induced by checking
whether the @code{F77_FUNC} macro is defined.
Now, to call that routine from a C program, we would do something like: