Dear all,
I am trying to install a package from bioconductor (biomaRt) for which I
need the RCurl package. I get the following main error message when I try
to install RCurl (and its dependencies).

configure: error: no acceptable C compiler found in $PATH
See `config.log' for more details.
ERROR: configuration failed for package ‘RCurl’

I searched for possible solutions and read in some online mailing list that
I might have to install Xcode to install the gcc compiler. I am not sure if
I should do this because I have installed RCurl in previous versions of R
without any problems (on this same computer). I upgraded to the latest R (R
version 2.14.0) and faced this problem. So I downgraded to R version 2.13.2
and still cannot install RCurl. I think my last successful installation of
RCurl was with R version 2.11.

Following is the complete error message and my R version details.
I really appreciate any help or suggestions.

Sincerely,
Hari

trying URL '
http://watson.nci.nih.gov/cran_mirror/src/contrib/XML_3.4-3.tar.gz'
Content type 'application/octet-stream' length 906364 bytes (885 Kb)
opened URL
==================================================
downloaded 885 Kb

trying URL '
http://watson.nci.nih.gov/cran_mirror/src/contrib/RCurl_1.7-0.tar.gz'
Content type 'application/octet-stream' length 813252 bytes (794 Kb)
opened URL
==================================================
downloaded 794 Kb

* installing *source* package ‘XML’ ...
checking for gcc... no
checking for cc... no
checking for cl.exe... no
configure: error: no acceptable C compiler found in $PATH
See `config.log' for more details.
ERROR: configuration failed for package ‘XML’
* removing
‘/Library/Frameworks/R.framework/Versions/2.13/Resources/library/XML’
* installing *source* package ‘RCurl’ ...
checking for curl-config... /usr/bin/curl-config
checking for gcc... no
checking for cc... no
checking for cc... no
checking for cl... no
configure: error: no acceptable C compiler found in $PATH
See `config.log' for more details.
ERROR: configuration failed for package ‘RCurl’
* removing
‘/Library/Frameworks/R.framework/Versions/2.13/Resources/library/RCurl’
* restoring previous
‘/Library/Frameworks/R.framework/Versions/2.13/Resources/library/RCurl’

The downloaded packages are in
‘/private/var/folders/a6/a60JdPfrHC0ZAizZWyNM-E+++TI/-Tmp-/RtmpVjBcvX/downloaded_packages’

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