[MacPorts] #47239: Failed to install gmp; Processing of port gcc47 failed

[MacPorts]

#47239: Failed to install gmp; Processing of port gcc47 failed
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 Reporter:  purnesht@…  |      Owner:  macports-tickets@…
     Type:  update      |     Status:  new
 Priority:  High        |  Milestone:  MacPorts Future
Component:  ports       |    Version:  2.3.3
 Keywords:              |       Port:
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 My System,
 OSX Yosemite (10.10.2 (14C109))

 I am trying to install GCC47 but we are getting below error.Please suggest
 the same.

 Error:
 Error: No valid Xcode installation is properly selected.
 Error: Please use xcode-select to select an Xcode installation:
 Error:     sudo xcode-select -switch
 /Applications/Xcode.app/Contents/Developer # version 6.2
 Error:
 Warning: xcodebuild exists but failed to execute
 Warning: Xcode does not appear to be installed; most ports will likely
 fail to build.
 --->  Computing dependencies for gcc47
 --->  Dependencies to be installed: cloog gmp isl gcc_select ld64
 ld64-latest libgcc libiconv libmpc mpfr ppl glpk
 --->  Configuring gmp
 Error: Failed to configure gmp, consult
 /opt/local/var/macports/build/_opt_local_var_macports_sources_rsync.macports.org_release_tarballs_ports_devel_gmp/gmp/work/gmp-6.0.0/config.log
 Error: org.macports.configure for port gmp returned: configure failure:
 command execution failed
 Error: Failed to install gmp
 Please see the log file for port gmp for details:
 /opt/local/var/macports/logs/_opt_local_var_macports_sources_rsync.macports.org_release_tarballs_ports_devel_gmp/gmp/main.log
 Error: The following dependencies were not installed: cloog gmp isl
 gcc_select ld64 ld64-latest libgcc libiconv libmpc mpfr ppl glpk
 To report a bug, follow the instructions in the guide:
     http://guide.macports.org/#project.tickets
 Error: Processing of port gcc47 failed

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Ticket URL: <https://trac.macports.org/ticket/47239>
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