Description
Provides a mechanism for chaining commands with a new forward-pipe operator, %>%. This operator will forward a value, or the result of an expression, into the next function call/expression. There is flexible support for the type of right-hand side expressions. For more information, see package vignette. To quote Rene Magritte, "Ceci n'est pas un pipe."
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CRAN Check Status
Show all 14 flavors
| Flavor | Status |
|---|---|
| r-devel-linux-x86_64-debian-clang | WARNING |
| r-devel-linux-x86_64-debian-gcc | OK |
| r-devel-linux-x86_64-fedora-clang | OK |
| r-devel-linux-x86_64-fedora-gcc | WARNING |
| r-devel-macos-arm64 | OK |
| r-devel-windows-x86_64 | OK |
| r-oldrel-macos-arm64 | OK |
| r-oldrel-macos-x86_64 | OK |
| r-oldrel-windows-x86_64 | OK |
| r-patched-linux-x86_64 | WARNING |
| r-release-linux-x86_64 | NOTE |
| r-release-macos-arm64 | NOTE |
| r-release-macos-x86_64 | NOTE |
| r-release-windows-x86_64 | NOTE |
Check details (7 non-OK)
compiled code
File ‘magrittr/libs/magrittr.so’:
Found non-API calls to R: ‘R_UnboundValue’, ‘Rf_allocSExp’,
‘SET_PRCODE’, ‘SET_PRENV’, ‘SET_PRVALUE’
These entry points may be removed soon:
‘SET_PRCODE’, ‘SET_PRENV’, ‘SET_PRVALUE’, ‘Rf_allocSExp’
Compiled code should not call non-API entry points in R.
See ‘Writing portable packages’ in the ‘Writing R Extensions’ manual,
and section ‘Moving into C API compliance’ for issues with the use of
non-API entry points.
compiled code
File ‘magrittr/libs/magrittr.so’:
Found non-API calls to R: ‘R_UnboundValue’, ‘Rf_allocSExp’,
‘SET_PRCODE’, ‘SET_PRENV’, ‘SET_PRVALUE’
These entry points may be removed soon:
‘SET_PRCODE’, ‘SET_PRENV’, ‘SET_PRVALUE’, ‘Rf_allocSExp’
Compiled code should not call non-API entry points in R.
See ‘Writing portable packages’ in the ‘Writing R Extensions’ manual,
and section ‘Moving into C API compliance’ for issues with the use of
non-API entry points.
compiled code
File ‘magrittr/libs/magrittr.so’:
Found non-API calls to R: ‘R_UnboundValue’, ‘Rf_allocSExp’,
‘SET_PRCODE’, ‘SET_PRENV’, ‘SET_PRVALUE’
These entry points may be removed soon:
‘SET_PRCODE’, ‘SET_PRENV’, ‘SET_PRVALUE’, ‘Rf_allocSExp’
Compiled code should not call non-API entry points in R.
See ‘Writing portable packages’ in the ‘Writing R Extensions’ manual,
and section ‘Moving into C API compliance’ for issues with the use of
non-API entry points.
compiled code
File ‘magrittr/libs/magrittr.so’:
Found non-API calls to R: ‘Rf_allocSExp’, ‘SET_PRCODE’, ‘SET_PRENV’,
‘SET_PRVALUE’
Compiled code should not call non-API entry points in R.
See ‘Writing portable packages’ in the ‘Writing R Extensions’ manual,
and section ‘Moving into C API compliance’ for issues with the use of
non-API entry points.
compiled code
File ‘magrittr/libs/magrittr.so’:
Found non-API calls to R: ‘Rf_allocSExp’, ‘SET_PRCODE’, ‘SET_PRENV’,
‘SET_PRVALUE’
Compiled code should not call non-API entry points in R.
See ‘Writing portable packages’ in the ‘Writing R Extensions’ manual,
and section ‘Moving into C API compliance’ for issues with the use of
non-API entry points.
compiled code
File ‘magrittr/libs/magrittr.so’:
Found non-API calls to R: ‘Rf_allocSExp’, ‘SET_PRCODE’, ‘SET_PRENV’,
‘SET_PRVALUE’
Compiled code should not call non-API entry points in R.
See ‘Writing portable packages’ in the ‘Writing R Extensions’ manual,
and section ‘Moving into C API compliance’ for issues with the use of
non-API entry points.
compiled code
File 'magrittr/libs/x64/magrittr.dll':
Found non-API calls to R: 'Rf_allocSExp', 'SET_PRCODE', 'SET_PRENV',
'SET_PRVALUE'
Compiled code should not call non-API entry points in R.
See 'Writing portable packages' in the 'Writing R Extensions' manual,
and section 'Moving into C API compliance' for issues with the use of
non-API entry points.
Check History
WARNING 3 OK · 5 NOTE · 6 WARNING · 0 ERROR · 0 FAILURE Mar 31, 2026
compiled code
File ‘magrittr/libs/magrittr.so’:
Found non-API calls to R: ‘Rf_allocSExp’, ‘SET_PRCODE’, ‘SET_PRENV’,
‘SET_PRVALUE’
These entry points may be removed soon:
‘SET_PRCODE’, ‘SET_PRENV’, ‘SET_PRVALUE’, ‘Rf_allocSExp’
Compiled code should not call non-API entry points in R.
See ‘Writing portable packages’ in the ‘Writing R Extensions’ manual,
and section ‘Moving into C API compliance’ for issues with the use of
non-API entry points.
compiled code
File ‘magrittr/libs/magrittr.so’:
Found non-API calls to R: ‘R_UnboundValue’, ‘Rf_allocSExp’,
‘SET_PRCODE’, ‘SET_PRENV’, ‘SET_PRVALUE’
These entry points may be removed soon:
‘SET_PRCODE’, ‘SET_PRENV’, ‘SET_PRVALUE’, ‘Rf_allocSExp’
Compiled code should not call non-API entry points in R.
See ‘Writing portable packages’ in the ‘Writing R Extensions’ manual,
and section ‘Moving into C API compliance’ for issues with the use of
non-API entry points.
compiled code
File ‘magrittr/libs/magrittr.so’:
Found non-API calls to R: ‘R_UnboundValue’, ‘Rf_allocSExp’,
‘SET_PRCODE’, ‘SET_PRENV’, ‘SET_PRVALUE’
These entry points may be removed soon:
‘SET_PRCODE’, ‘SET_PRENV’, ‘SET_PRVALUE’, ‘Rf_allocSExp’
Compiled code should not call non-API entry points in R.
See ‘Writing portable packages’ in the ‘Writing R Extensions’ manual,
and section ‘Moving into C API compliance’ for issues with the use of
non-API entry points.
compiled code
File ‘magrittr/libs/magrittr.so’:
Found non-API calls to R: ‘Rf_allocSExp’, ‘SET_PRCODE’, ‘SET_PRENV’,
‘SET_PRVALUE’
These entry points may be removed soon:
‘SET_PRCODE’, ‘SET_PRENV’, ‘SET_PRVALUE’, ‘Rf_allocSExp’
Compiled code should not call non-API entry points in R.
See ‘Writing portable packages’ in the ‘Writing R Extensions’ manual,
and section ‘Moving into C API compliance’ for issues with the use of
non-API entry points.
compiled code
File ‘magrittr/libs/magrittr.so’:
Found non-API calls to R: ‘Rf_allocSExp’, ‘SET_PRCODE’, ‘SET_PRENV’,
‘SET_PRVALUE’
These entry points may be removed soon:
‘SET_PRCODE’, ‘SET_PRENV’, ‘SET_PRVALUE’, ‘Rf_allocSExp’
Compiled code should not call non-API entry points in R.
See ‘Writing portable packages’ in the ‘Writing R Extensions’ manual,
and section ‘Moving into C API compliance’ for issues with the use of
non-API entry points.
compiled code
File 'magrittr/libs/x64/magrittr.dll':
Found non-API calls to R: 'R_UnboundValue', 'Rf_allocSExp',
'SET_PRCODE', 'SET_PRENV', 'SET_PRVALUE'
These entry points may be removed soon:
'SET_PRCODE', 'SET_PRENV', 'SET_PRVALUE', 'Rf_allocSExp'
Compiled code should not call non-API entry points in R.
See 'Writing portable packages' in the 'Writing R Extensions' manual,
and section 'Moving into C API compliance' for issues with the use of
non-API entry points.
compiled code
File ‘magrittr/libs/magrittr.so’:
Found non-API calls to R: ‘Rf_allocSExp’, ‘SET_PRCODE’, ‘SET_PRENV’,
‘SET_PRVALUE’
Compiled code should not call non-API entry points in R.
See ‘Writing portable packages’ in the ‘Writing R Extensions’ manual,
and section ‘Moving into C API compliance’ for issues with the use of
non-API entry points.
compiled code
File ‘magrittr/libs/magrittr.so’:
Found non-API calls to R: ‘Rf_allocSExp’, ‘SET_PRCODE’, ‘SET_PRENV’,
‘SET_PRVALUE’
Compiled code should not call non-API entry points in R.
See ‘Writing portable packages’ in the ‘Writing R Extensions’ manual,
and section ‘Moving into C API compliance’ for issues with the use of
non-API entry points.
compiled code
File ‘magrittr/libs/magrittr.so’:
Found non-API calls to R: ‘Rf_allocSExp’, ‘SET_PRCODE’, ‘SET_PRENV’,
‘SET_PRVALUE’
Compiled code should not call non-API entry points in R.
See ‘Writing portable packages’ in the ‘Writing R Extensions’ manual,
and section ‘Moving into C API compliance’ for issues with the use of
non-API entry points.
compiled code
File ‘magrittr/libs/magrittr.so’:
Found non-API calls to R: ‘Rf_allocSExp’, ‘SET_PRCODE’, ‘SET_PRENV’,
‘SET_PRVALUE’
Compiled code should not call non-API entry points in R.
See ‘Writing portable packages’ in the ‘Writing R Extensions’ manual,
and section ‘Moving into C API compliance’ for issues with the use of
non-API entry points.
compiled code
File 'magrittr/libs/x64/magrittr.dll':
Found non-API calls to R: 'Rf_allocSExp', 'SET_PRCODE', 'SET_PRENV',
'SET_PRVALUE'
Compiled code should not call non-API entry points in R.
See 'Writing portable packages' in the 'Writing R Extensions' manual,
and section 'Moving into C API compliance' for issues with the use of
non-API entry points.
ERROR 3 OK · 6 NOTE · 4 WARNING · 1 ERROR · 0 FAILURE Mar 27, 2026
compiled code
File ‘magrittr/libs/magrittr.so’:
Found non-API calls to R: ‘Rf_allocSExp’, ‘SET_PRCODE’, ‘SET_PRENV’,
‘SET_PRVALUE’
These entry points may be removed soon:
‘SET_PRCODE’, ‘SET_PRENV’, ‘SET_PRVALUE’, ‘Rf_allocSExp’
Compiled code should not call non-API entry points in R.
See ‘Writing portable packages’ in the ‘Writing R Extensions’ manual,
and section ‘Moving into C API compliance’ for issues with the use of
non-API entry points.
compiled code
File ‘magrittr/libs/magrittr.so’:
Found non-API calls to R: ‘R_UnboundValue’, ‘Rf_allocSExp’,
‘SET_PRCODE’, ‘SET_PRENV’, ‘SET_PRVALUE’
These entry points may be removed soon:
‘SET_PRCODE’, ‘SET_PRENV’, ‘SET_PRVALUE’, ‘Rf_allocSExp’
Compiled code should not call non-API entry points in R.
See ‘Writing portable packages’ in the ‘Writing R Extensions’ manual,
and section ‘Moving into C API compliance’ for issues with the use of
non-API entry points.
compiled code
File ‘magrittr/libs/magrittr.so’:
Found non-API calls to R: ‘Rf_allocSExp’, ‘SET_PRCODE’, ‘SET_PRENV’,
‘SET_PRVALUE’
These entry points may be removed soon:
‘SET_PRCODE’, ‘SET_PRENV’, ‘SET_PRVALUE’, ‘Rf_allocSExp’
Compiled code should not call non-API entry points in R.
See ‘Writing portable packages’ in the ‘Writing R Extensions’ manual,
and section ‘Moving into C API compliance’ for issues with the use of
non-API entry points.
compiled code
File ‘magrittr/libs/magrittr.so’:
Found non-API calls to R: ‘Rf_allocSExp’, ‘SET_PRCODE’, ‘SET_PRENV’,
‘SET_PRVALUE’
These entry points may be removed soon:
‘SET_PRCODE’, ‘SET_PRENV’, ‘SET_PRVALUE’, ‘Rf_allocSExp’
Compiled code should not call non-API entry points in R.
See ‘Writing portable packages’ in the ‘Writing R Extensions’ manual,
and section ‘Moving into C API compliance’ for issues with the use of
non-API entry points.
compiled code
File ‘magrittr/libs/magrittr.so’:
Found non-API calls to R: ‘Rf_allocSExp’, ‘SET_PRCODE’, ‘SET_PRENV’,
‘SET_PRVALUE’
Compiled code should not call non-API entry points in R.
See ‘Writing portable packages’ in the ‘Writing R Extensions’ manual,
and section ‘Moving into C API compliance’ for issues with the use of
non-API entry points.
whether package can be installed
Installation failed. See 'd:/Rcompile/CRANpkg/local/4.6/magrittr.Rcheck/00install.out' for details.
compiled code
File ‘magrittr/libs/magrittr.so’:
Found non-API calls to R: ‘Rf_allocSExp’, ‘SET_PRCODE’, ‘SET_PRENV’,
‘SET_PRVALUE’
Compiled code should not call non-API entry points in R.
See ‘Writing portable packages’ in the ‘Writing R Extensions’ manual,
and section ‘Moving into C API compliance’ for issues with the use of
non-API entry points.
compiled code
File ‘magrittr/libs/magrittr.so’:
Found non-API calls to R: ‘Rf_allocSExp’, ‘SET_PRCODE’, ‘SET_PRENV’,
‘SET_PRVALUE’
Compiled code should not call non-API entry points in R.
See ‘Writing portable packages’ in the ‘Writing R Extensions’ manual,
and section ‘Moving into C API compliance’ for issues with the use of
non-API entry points.
compiled code
File ‘magrittr/libs/magrittr.so’:
Found non-API calls to R: ‘Rf_allocSExp’, ‘SET_PRCODE’, ‘SET_PRENV’,
‘SET_PRVALUE’
Compiled code should not call non-API entry points in R.
See ‘Writing portable packages’ in the ‘Writing R Extensions’ manual,
and section ‘Moving into C API compliance’ for issues with the use of
non-API entry points.
compiled code
File ‘magrittr/libs/magrittr.so’:
Found non-API calls to R: ‘Rf_allocSExp’, ‘SET_PRCODE’, ‘SET_PRENV’,
‘SET_PRVALUE’
Compiled code should not call non-API entry points in R.
See ‘Writing portable packages’ in the ‘Writing R Extensions’ manual,
and section ‘Moving into C API compliance’ for issues with the use of
non-API entry points.
compiled code
File 'magrittr/libs/x64/magrittr.dll':
Found non-API calls to R: 'Rf_allocSExp', 'SET_PRCODE', 'SET_PRENV',
'SET_PRVALUE'
Compiled code should not call non-API entry points in R.
See 'Writing portable packages' in the 'Writing R Extensions' manual,
and section 'Moving into C API compliance' for issues with the use of
non-API entry points.
WARNING 3 OK · 8 NOTE · 3 WARNING · 0 ERROR · 0 FAILURE Mar 17, 2026
compiled code
File ‘magrittr/libs/magrittr.so’:
Found non-API calls to R: ‘Rf_allocSExp’, ‘SET_PRCODE’, ‘SET_PRENV’,
‘SET_PRVALUE’
Compiled code should not call non-API entry points in R.
See ‘Writing portable packages’ in the ‘Writing R Extensions’ manual,
and section ‘Moving into C API compliance’ for issues with the use of
non-API entry points.
compiled code
File ‘magrittr/libs/magrittr.so’:
Found non-API calls to R: ‘Rf_allocSExp’, ‘SET_PRCODE’, ‘SET_PRENV’,
‘SET_PRVALUE’
These entry points may be removed soon:
‘SET_PRCODE’, ‘SET_PRENV’, ‘SET_PRVALUE’, ‘Rf_allocSExp’
Compiled code should not call non-API entry points in R.
See ‘Writing portable packages’ in the ‘Writing R Extensions’ manual,
and section ‘Moving into C API compliance’ for issues with the use of
non-API entry points.
compiled code
File ‘magrittr/libs/magrittr.so’:
Found non-API calls to R: ‘Rf_allocSExp’, ‘SET_PRCODE’, ‘SET_PRENV’,
‘SET_PRVALUE’
These entry points may be removed soon:
‘SET_PRCODE’, ‘SET_PRENV’, ‘SET_PRVALUE’, ‘Rf_allocSExp’
Compiled code should not call non-API entry points in R.
See ‘Writing portable packages’ in the ‘Writing R Extensions’ manual,
and section ‘Moving into C API compliance’ for issues with the use of
non-API entry points.
compiled code
File ‘magrittr/libs/magrittr.so’:
Found non-API calls to R: ‘Rf_allocSExp’, ‘SET_PRCODE’, ‘SET_PRENV’,
‘SET_PRVALUE’
These entry points may be removed soon:
‘SET_PRCODE’, ‘SET_PRENV’, ‘SET_PRVALUE’, ‘Rf_allocSExp’
Compiled code should not call non-API entry points in R.
See ‘Writing portable packages’ in the ‘Writing R Extensions’ manual,
and section ‘Moving into C API compliance’ for issues with the use of
non-API entry points.
compiled code
File ‘magrittr/libs/magrittr.so’:
Found non-API calls to R: ‘Rf_allocSExp’, ‘SET_PRCODE’, ‘SET_PRENV’,
‘SET_PRVALUE’
Compiled code should not call non-API entry points in R.
See ‘Writing portable packages’ in the ‘Writing R Extensions’ manual,
and section ‘Moving into C API compliance’ for issues with the use of
non-API entry points.
compiled code
File 'magrittr/libs/x64/magrittr.dll':
Found non-API calls to R: 'Rf_allocSExp', 'SET_PRCODE', 'SET_PRENV',
'SET_PRVALUE'
Compiled code should not call non-API entry points in R.
See 'Writing portable packages' in the 'Writing R Extensions' manual,
and section 'Moving into C API compliance' for issues with the use of
non-API entry points.
compiled code
File ‘magrittr/libs/magrittr.so’:
Found non-API calls to R: ‘Rf_allocSExp’, ‘SET_PRCODE’, ‘SET_PRENV’,
‘SET_PRVALUE’
Compiled code should not call non-API entry points in R.
See ‘Writing portable packages’ in the ‘Writing R Extensions’ manual,
and section ‘Moving into C API compliance’ for issues with the use of
non-API entry points.
compiled code
File ‘magrittr/libs/magrittr.so’:
Found non-API calls to R: ‘Rf_allocSExp’, ‘SET_PRCODE’, ‘SET_PRENV’,
‘SET_PRVALUE’
Compiled code should not call non-API entry points in R.
See ‘Writing portable packages’ in the ‘Writing R Extensions’ manual,
and section ‘Moving into C API compliance’ for issues with the use of
non-API entry points.
compiled code
File ‘magrittr/libs/magrittr.so’:
Found non-API calls to R: ‘Rf_allocSExp’, ‘SET_PRCODE’, ‘SET_PRENV’,
‘SET_PRVALUE’
Compiled code should not call non-API entry points in R.
See ‘Writing portable packages’ in the ‘Writing R Extensions’ manual,
and section ‘Moving into C API compliance’ for issues with the use of
non-API entry points.
compiled code
File ‘magrittr/libs/magrittr.so’:
Found non-API calls to R: ‘Rf_allocSExp’, ‘SET_PRCODE’, ‘SET_PRENV’,
‘SET_PRVALUE’
Compiled code should not call non-API entry points in R.
See ‘Writing portable packages’ in the ‘Writing R Extensions’ manual,
and section ‘Moving into C API compliance’ for issues with the use of
non-API entry points.
compiled code
File 'magrittr/libs/x64/magrittr.dll':
Found non-API calls to R: 'Rf_allocSExp', 'SET_PRCODE', 'SET_PRENV',
'SET_PRVALUE'
Compiled code should not call non-API entry points in R.
See 'Writing portable packages' in the 'Writing R Extensions' manual,
and section 'Moving into C API compliance' for issues with the use of
non-API entry points.
NOTE 3 OK · 11 NOTE · 0 WARNING · 0 ERROR · 0 FAILURE Mar 10, 2026
compiled code
File ‘magrittr/libs/magrittr.so’:
Found non-API calls to R: ‘Rf_allocSExp’, ‘SET_PRCODE’, ‘SET_PRENV’,
‘SET_PRVALUE’
Compiled code should not call non-API entry points in R.
See ‘Writing portable packages’ in the ‘Writing R Extensions’ manual,
and section ‘Moving into C API compliance’ for issues with the use of
non-API entry points.
compiled code
File ‘magrittr/libs/magrittr.so’:
Found non-API calls to R: ‘Rf_allocSExp’, ‘SET_PRCODE’, ‘SET_PRENV’,
‘SET_PRVALUE’
Compiled code should not call non-API entry points in R.
See ‘Writing portable packages’ in the ‘Writing R Extensions’ manual,
and section ‘Moving into C API compliance’ for issues with the use of
non-API entry points.
compiled code
File ‘magrittr/libs/magrittr.so’:
Found non-API calls to R: ‘Rf_allocSExp’, ‘SET_PRCODE’, ‘SET_PRENV’,
‘SET_PRVALUE’
Compiled code should not call non-API entry points in R.
See ‘Writing portable packages’ in the ‘Writing R Extensions’ manual,
and section ‘Moving into C API compliance’ for issues with the use of
non-API entry points.
compiled code
File ‘magrittr/libs/magrittr.so’:
Found non-API calls to R: ‘Rf_allocSExp’, ‘SET_PRCODE’, ‘SET_PRENV’,
‘SET_PRVALUE’
Compiled code should not call non-API entry points in R.
See ‘Writing portable packages’ in the ‘Writing R Extensions’ manual,
and section ‘Moving into C API compliance’ for issues with the use of
non-API entry points.
compiled code
File ‘magrittr/libs/magrittr.so’:
Found non-API calls to R: ‘Rf_allocSExp’, ‘SET_PRCODE’, ‘SET_PRENV’,
‘SET_PRVALUE’
Compiled code should not call non-API entry points in R.
See ‘Writing portable packages’ in the ‘Writing R Extensions’ manual,
and section ‘Moving into C API compliance’ for issues with the use of
non-API entry points.
compiled code
File 'magrittr/libs/x64/magrittr.dll':
Found non-API calls to R: 'Rf_allocSExp', 'SET_PRCODE', 'SET_PRENV',
'SET_PRVALUE'
Compiled code should not call non-API entry points in R.
See 'Writing portable packages' in the 'Writing R Extensions' manual,
and section 'Moving into C API compliance' for issues with the use of
non-API entry points.
compiled code
File ‘magrittr/libs/magrittr.so’:
Found non-API calls to R: ‘Rf_allocSExp’, ‘SET_PRCODE’, ‘SET_PRENV’,
‘SET_PRVALUE’
Compiled code should not call non-API entry points in R.
See ‘Writing portable packages’ in the ‘Writing R Extensions’ manual,
and section ‘Moving into C API compliance’ for issues with the use of
non-API entry points.
compiled code
File ‘magrittr/libs/magrittr.so’:
Found non-API calls to R: ‘Rf_allocSExp’, ‘SET_PRCODE’, ‘SET_PRENV’,
‘SET_PRVALUE’
Compiled code should not call non-API entry points in R.
See ‘Writing portable packages’ in the ‘Writing R Extensions’ manual,
and section ‘Moving into C API compliance’ for issues with the use of
non-API entry points.
compiled code
File ‘magrittr/libs/magrittr.so’:
Found non-API calls to R: ‘Rf_allocSExp’, ‘SET_PRCODE’, ‘SET_PRENV’,
‘SET_PRVALUE’
Compiled code should not call non-API entry points in R.
See ‘Writing portable packages’ in the ‘Writing R Extensions’ manual,
and section ‘Moving into C API compliance’ for issues with the use of
non-API entry points.
compiled code
File ‘magrittr/libs/magrittr.so’:
Found non-API calls to R: ‘Rf_allocSExp’, ‘SET_PRCODE’, ‘SET_PRENV’,
‘SET_PRVALUE’
Compiled code should not call non-API entry points in R.
See ‘Writing portable packages’ in the ‘Writing R Extensions’ manual,
and section ‘Moving into C API compliance’ for issues with the use of
non-API entry points.
compiled code
File 'magrittr/libs/x64/magrittr.dll':
Found non-API calls to R: 'Rf_allocSExp', 'SET_PRCODE', 'SET_PRENV',
'SET_PRVALUE'
Compiled code should not call non-API entry points in R.
See 'Writing portable packages' in the 'Writing R Extensions' manual,
and section 'Moving into C API compliance' for issues with the use of
non-API entry points.