Merge topic 'help_check'

d62d0f048f Help: CheckFortranFunctionExists: recommend more general CheckSourceCompiles
8fddc2bb2f Help: refer to CheckSourceCompiles instead of older

Acked-by: Kitware Robot <[email protected]>
Merge-request: !6446

Modules/CheckCXXSymbolExists.cmake

@@ -25,7 +25,7 @@ Check if a symbol exists as a function, variable, or macro in ``C++``.
   as a function or variable then the symbol must also be available for
   linking.  If the symbol is a type, enum value, or C++ template it will
   not be recognized: consider using the :module:`CheckTypeSize`
-  or :module:`CheckCXXSourceCompiles` module instead.
+  or :module:`CheckSourceCompiles` module instead.
 
 .. note::
 

Modules/CheckFortranFunctionExists.cmake

@@ -20,6 +20,12 @@ Check if a Fortran function exists.
   ``<result>``
     variable to store the result; will be created as an internal cache variable.
 
+.. note::
+
+  This command does not detect functions in Fortran modules. In general it is
+  recommended to use :module:`CheckSourceCompiles` instead to determine if a
+  Fortran function or subroutine is available.
+
 The following variables may be set before calling this macro to modify
 the way the check is run:
 

Modules/CheckSymbolExists.cmake

@@ -24,7 +24,7 @@ available and assumed to work.  If the header files declare the symbol
 as a function or variable then the symbol must also be available for
 linking (so intrinsics may not be detected).
 If the symbol is a type, enum value, or intrinsic it will not be recognized
-(consider using :module:`CheckTypeSize` or :module:`CheckCSourceCompiles`).
+(consider using :module:`CheckTypeSize` or :module:`CheckSourceCompiles`).
 If the check needs to be done in C++, consider using
 :module:`CheckCXXSymbolExists` instead.