gfortran: Command not found

Dear Professors Ripley and Murdoch:
    Thanks very much for the suggestion to upgrade my Rtools.  That fixed 
the problem.
    Another question:  How do people typically debug problems linking to 
legacy Fortran?  For example, is there a reasonable (open source) debugger 
for gfortran?

In the DierckxSpline package, Sundar Dorai-Raj and I link R to 
Fortran written by Paul Dierckx in 1979, last updated in 1987.  We've 
encountered segmentation errors killing R, which are difficult to diagnose.
    Thanks again.
    Spencer Graves 
Prof Brian Ripley wrote:

On Mon, 5 May 2008, Spencer Graves wrote:

Hi, All:
    How do I get information about the "R CMD check / build / install" 
process, especially regarding what software to install and how to 
configure it under Windows XP?

The 'R Installation and Adminstration' manual.

    I ask, because "R CMD check" complained, "gfortran: Command not 
found". I found 'gfortran-sjlj.exe' in 'C:\Program 
Files\R\Rtools\MinGW\bin', which is in the path.

You need to update your Rtools.

    This was on a package that I built successfully in January under R 
2.6.2.  Now with R 2.7.0, I can't get it to work.
    Thanks for your help.      Spencer Graves
######################

Contents of "00install.out": installing R.css in 
D:/spencerg/statmtds/splines/DierckxSpline/DierckxSpline.Rcheck

---------- Making package DierckxSpline ------------
adding build stamp to DESCRIPTION
installing NAMESPACE file and metadata
making DLL ...
gfortran   -O3  -c bispev.f -o bispev.o
make[3]: gfortran: Command not found
make[3]: *** [bispev.o] Error 127
make[2]: *** [srcDynlib] Error 2
make[1]: *** [all] Error 2
make: *** [pkg-DierckxSpline] Error 2
*** Installation of DierckxSpline failed ***

Removing 
'D:/spencerg/statmtds/splines/DierckxSpline/DierckxSpline.Rcheck/DierckxSpline' 

#############################################

sessionInfo(): R version 2.7.0 (2008-04-22)
i386-pc-mingw32

locale:
LC_COLLATE=English_United States.1252;LC_CTYPE=English_United 
States.1252;LC_MONETARY=English_United 
States.1252;LC_NUMERIC=C;LC_TIME=English_United States.1252

attached base packages:
[1] stats     graphics  grDevices utils     datasets  methods   base 
#############################################

PATH =

C:\Program Files\R\Rtools\bin;C:\Program 
Files\R\Rtools\perl\bin;C:\Program 
Files\R\Rtools\MinGW\bin;c:\perl\bin\;c:\program 
files\thinkpad\utilities;c:\windows\system32;c:\windows;c:\windows\system32\wbem;c:\program 
files\intel\wireless\bin\;c:\program 
files\hummingbird\connectivity\11.00\accessories\;c:\program 
files\intel\wireless\bin\;c:\program files\ati 
technologies\ati.ace\;c:\program files\r\r-2.7.0\bin;c:\program 
files\miktex 2.5\miktex\bin;c:\program files\html help 
workshop;c:\mingw\bin;C:\Program Files\MATLAB\R2007a\bin;C:\Program 
Files\MATLAB\R2007a\bin\win32;c:\program 
files\matlab\r2006b\bin;c:\program 
files\matlab\r2006b\bin\win32;C:\Program Files\MATLAB\MATLAB Component 
Runtime\v76\runtime\win32;C:\Program Files\Common Files\Lenovo;C:\Program 
Files\Intel\Wireless\Bin\;C:\Program Files\Intel\Wireless\Bin\