mention -fc-prototypes-external against gfortran 10.2

git-svn-id: https://svn.r-project.org/R/trunk@80031 00db46b3-68df-0310-9c12-caf00c1e9a41
wch · Feb 22, 2021 · c89978c · c89978c
1 parent 9646e6a
commit c89978c
Showing 1 changed file with 3 additions and 1 deletion.
diff --git a/doc/manual/R-admin.texi b/doc/manual/R-admin.texi
@@ -5160,7 +5160,9 @@ external software.
 
 A more recent Fortran compiler for Catalina and later is available at
 @uref{https://github.com/@/fxcoudert/@/gfortran-for-macOS/@/releases/@/download/@/10.2/@/gfortran-10.2-Catalina.dmg}.
-(That does not run on High Sierra.)
+(That does not run on High Sierra.)  This supports the option
+@option{-fc-prototypes-external} mentioned in the `Writing R Extensions'
+manual
 
 The default security settings for Catalina and later can make it
 difficult to install recently-built Apple packages which have not been