From: Noah Misch <noah@cs.caltech.edu>
Date: Mon, 4 Jun 2007 22:49:41 +0000 (+0000)
Subject: * doc/autoconf.texi (AC_F77_MAIN): Give a specific usage example that
X-Git-Tag: v2.62~301
X-Git-Url: http://git.ipfire.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=77ad2865a2326fe8a93a5cb3e2f39dbab56bd1b2;p=thirdparty%2Fautoconf.git

* doc/autoconf.texi (AC_F77_MAIN): Give a specific usage example that
works with both C and C++.
---

diff --git a/ChangeLog b/ChangeLog
index 9e3e15aa..4c96f1e4 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,3 +1,8 @@
+2007-06-04  Noah Misch  <noah@cs.caltech.edu>
+
+	* doc/autoconf.texi (AC_F77_MAIN): Give a specific usage example that
+	works with both C and C++.
+
 2007-06-03  Noah Misch  <noah@cs.caltech.edu>,
 	    Bruno Haible  <bruno@clisp.org>
 
diff --git a/doc/autoconf.texi b/doc/autoconf.texi
index 1bb7978e..7268a592 100644
--- a/doc/autoconf.texi
+++ b/doc/autoconf.texi
@@ -7094,8 +7094,16 @@ alternate main function name is found, @code{F77_MAIN} and @code{FC_MAIN} are
 simply defined to @code{main}.)
 
 Thus, when calling Fortran routines from C that perform things like I/O,
-one should use this macro and name the "main" function
-@code{F77_MAIN} or @code{FC_MAIN} instead of @code{main}.
+one should use this macro and declare the "main" function like so:
+
+@example
+#ifdef __cplusplus
+  extern "C"
+#endif
+int F77_MAIN(int argc, char *argv[]);
+@end example
+
+(Again, replace @code{F77} with @code{FC} for Fortran instead of Fortran 77.)
 @end defmac
 
 @defmac AC_F77_WRAPPERS