I am installing package RCurl in R and getting an error

  checking for curl-config... no

  Cannot find curl-config

  ERROR: configuration failed for package ‘RCurl’

I have tried to install libcurl on Ubuntu, but it doesn't solve my problem have some dependecies

sudo apt-get install libcurl4-gnutls-dev

Some packages could not be installed. This may mean that you have

requested an impossible situation or if you are using the unstable

distribution that some required packages have not yet been created

or been moved out of Incoming.

The following information may help to resolve the situation:

The following packages have unmet dependencies:

libcurl4-gnutls-dev : Depends: libcurl3-gnutls (= 7.29.0-1ubuntu3.1) but 7.29.0-1ubuntu3.2 is to be installed

Depends: libldap2-dev but it is not going to be installed

E: Unable to correct problems, you have held broken packages.

locate curl config gives me nothing:

locate curl-config

curl-config

The program 'curl-config' can be found in the following packages:

* libcurl4-gnutls-dev

* libcurl4-nss-dev

* libcurl4-openssl-dev

I went through some of the solution RCurl but it is working. Can you suggest or help in this direction. Thank you so much.

Edit

when i tried to install(Curl) from Ubuntu Software center got the same erroe message

Package dependencies cannot be resolved

This error could be caused by required additional software packages which are missing or not installable. Furthermore there could be a conflict between software packages which are not allowed to be installed at the same time.

The following packages have unmet dependencies:

 curl: Depends: libcurl3 (= 7.29.0-1ubuntu3.1) but 7.29.0-1ubuntu3.2 is to be installed

  Depends: zlib1g (>= 1:1.1.4) but 1:1.2.7.dfsg-13ubuntu2 is to be installed

EDITED

sudo aptitude install libcurl4-openssl-dev

The following NEW packages will be installed:

libcurl4-openssl-dev{b} 

0 packages upgraded, 1 newly installed, 0 to remove and 0 not upgraded.

Need to get 1,210 kB of archives. After unpacking 2,778 kB will be used.

The following packages have unmet dependencies:

libcurl4-openssl-dev : Depends: libcurl3 (= 7.29.0-1ubuntu3.1) but 7.29.0-1ubuntu3.2 is installed.

                    Depends: libidn11-dev but it is not going to be installed.

                    Depends: libkrb5-dev but it is not going to be installed.

                    Depends: libldap2-dev but it is not going to be installed.

                    Depends: librtmp-dev but it is not going to be installed.

                    Depends: libssl-dev but it is not going to be installed.

 The following actions will resolve these dependencies:

 Keep the following packages at their current version:

 1)     libcurl4-openssl-dev [Not Installed]