Error installing Ruby with RVM (OSX 10.8)

Question

When trying to install Ruby 1.9.3 using RVM (rvm install ruby 1.9.3) I get the following error:

Searching for binary rubies, this might take some time.

No binary rubies available for: osx/10.8/x86_64/ruby-1.9.3-p362.
Continuing with compilation. Please read 'rvm mount' to get more information on binary rubies.

Fetching yaml-0.1.4.tar.gz to /Users/christiaan/.rvm/archives
Extracting yaml to /Users/christiaan/.rvm/src/yaml-0.1.4
Configuring yaml in /Users/christiaan/.rvm/src/yaml-0.1.4.

Error running 'env LDFLAGS=-L/opt/sm/pkg/active/lib CFLAGS=-I/opt/sm/pkg/active/include CPATH=/opt/sm/pkg/active/include ./configure --prefix=/Users/christiaan/.rvm/usr', please read /Users/christiaan/.rvm/log/ruby-1.9.3-p362/yaml/configure.log

Compiling yaml in /Users/christiaan/.rvm/src/yaml-0.1.4.

Error running 'make', please read /Users/christiaan/.rvm/log/ruby-1.9.3-p362/yaml/make.log
Installing Ruby from source to: /Users/christiaan/.rvm/rubies/ruby-1.9.3-p362, this may take a while depending on your cpu(s)...
ruby-1.9.3-p362 - #downloading ruby-1.9.3-p362, this may take a while depending on your connection...
ruby-1.9.3-p362 - #extracted to /Users/christiaan/.rvm/src/ruby-1.9.3-p362 (already extracted)
ruby-1.9.3-p362 - #configuring
Error running 'env LDFLAGS=-L/opt/sm/pkg/active/lib CFLAGS=-I/opt/sm/pkg/active/include CPATH=/opt/sm/pkg/active/include ./configure --enable-shared --disable-install-doc --prefix=/Users/christiaan/.rvm/rubies/ruby-1.9.3-p362 --with-opt-dir=/Users/christiaan/.rvm/usr', please read /Users/christiaan/.rvm/log/ruby-1.9.3-p362/configure.log

There has been an error while running configure. Halting the installation.

I've tried all the tips from similar questions, but can't seem to fix this.

YAML Log (first error log produced):

[2012-12-28 16:18:06] env LDFLAGS=-L/opt/sm/pkg/active/lib CFLAGS=-I/opt/sm/pkg/active/include CPATH=/opt/sm/pkg/active/include ./configure --prefix=/Users/christiaan/.rvm/usr
current path: /Users/christiaan/.rvm/src/yaml-0.1.4
command(4): env LDFLAGS=-L/opt/sm/pkg/active/lib CFLAGS=-I/opt/sm/pkg/active/include CPATH=/opt/sm/pkg/active/include ./configure --prefix=/Users/christiaan/.rvm/usr
checking for a BSD-compatible install... /usr/bin/install -c
checking whether build environment is sane... yes
checking for a thread-safe mkdir -p... config/install-sh -c -d
checking for gawk... no
checking for mawk... no
checking for nawk... no
checking for awk... awk
checking whether make sets $(MAKE)... yes
checking for gcc... /usr/local/bin/gcc-4.2
checking whether the C compiler works... no
configure: error: in `/Users/christiaan/.rvm/src/yaml-0.1.4':
configure: error: C compiler cannot create executables
See `config.log' for more details

RVM Log (second error log produced):

[2012-12-28 16:18:08] env LDFLAGS=-L/opt/sm/pkg/active/lib CFLAGS=-I/opt/sm/pkg/active/include CPATH=/opt/sm/pkg/active/include ./configure --enable-shared --disable-install-doc --prefix=/Users/christiaan/.rvm/rubies/ruby-1.9.3-p362 --with-opt-dir=/Users/christiaan/.rvm/usr
current path: /Users/christiaan/.rvm/src/ruby-1.9.3-p362
command(7): env LDFLAGS=-L/opt/sm/pkg/active/lib CFLAGS=-I/opt/sm/pkg/active/include CPATH=/opt/sm/pkg/active/include ./configure --enable-shared --disable-install-doc --prefix=/Users/christiaan/.rvm/rubies/ruby-1.9.3-p362 --with-opt-dir=/Users/christiaan/.rvm/usr
checking build system type... x86_64-apple-darwin12.2.0
checking host system type... x86_64-apple-darwin12.2.0
checking target system type... x86_64-apple-darwin12.2.0
checking for C compiler default output file name... 
configure: error: C compiler cannot create executables
See `config.log' for more details.

Answer 1

Your main issue is:

configure: error: C compiler cannot create executables

So search for solutions to that problem. Like:

rvm install 1.9.3 --with-gcc=clang

Other examples:

• How can I install Ruby 1.9.3 in Mac OS X Lion?
• Why am I getting a "C compiler cannot create executables" (successfully written C code prior to this and compiles that)?

Answer 2

It is a duplicate, there are already few answers for this but I have made the fix also into RVM, make sure to run rvm get head first and read the output - the fix is displayed there.

This problem is also reported back to RailsInstaller: https://github.com/railsinstaller/railsinstaller-nix/issues/10

Answer 3

Xcode->Preferences

Check "Command line tools"