title: Installing Homebrew, libjpeg, and optipng for HTML5 Boilerplate build tool use
body: <p>Dipping my toe into command prompts.. totally lost.</p>
  
  <p>I've installed Homebrew, and attempted to install libjpeg and optipng via <code>brew install libjpeg optipng</code>and have run into errors. I'm not sure how exactly to describe them.. so here's the code! I'm in Terminal on a Mac running OSX 10.6.7</p>
  
  <p>Thank you SO much for the help.</p>
  
  <pre><code>1961:~ Daniel$ brew install libjpeg optipng
  ==&gt; Downloading http://www.ijg.org/files/jpegsrc.v8c.tar.gz
  File already downloaded and cached to /Users/Daniel/Library/Caches/Homebrew
  ==&gt; ./configure --prefix=/usr/local/Cellar/jpeg/8c --disable-dependency-tracking
  checking build system type... i386-apple-darwin10.7.3
  checking host system type... i386-apple-darwin10.7.3
  checking target system type... i386-apple-darwin10.7.3
  checking for a BSD-compatible install... /usr/bin/install -c
  checking whether build environment is sane... yes
  checking for a thread-safe mkdir -p... ./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)... no
  checking for style of include used by make... none
  checking for gcc... /usr/bin/cc
  checking whether the C compiler works... no
  configure: error: in `/private/tmp/homebrew-jpeg-8c-42or/jpeg-8c':
  configure: error: C compiler cannot create executables
  See `config.log' for more details
  ==&gt; Exit Status: 77
  http://github.com/mxcl/homebrew/blob/master/Library/Formula/jpeg.rb#L11
  ==&gt; Environment
  HOMEBREW_VERSION: 0.8
  HEAD: (none)
  HOMEBREW_PREFIX: /usr/local
  HOMEBREW_CELLAR: /usr/local/Cellar
  HOMEBREW_REPOSITORY: /usr/local
  HOMEBREW_LIBRARY_PATH: /usr/local/Library/Homebrew
  Hardware: 8-core 64-bit dunno
  OS X: 10.6.7
  Kernel Architecture: x86_64
  Ruby: 1.8.7-174
  /usr/bin/ruby =&gt; /System/Library/Frameworks/Ruby.framework/Versions/1.8/usr/bin/ruby
  Xcode: 
  GCC-4.0: N/A 
  GCC-4.2: N/A 
  LLVM: build 2335 
  MacPorts or Fink? false
  X11 installed? true
  ==&gt; Build Flags
  CC: /usr/bin/cc
  CXX: /usr/bin/c++
  LD: /usr/bin/cc
  CFLAGS: -O3 -w -pipe -arch i386 -arch x86_64
  CXXFLAGS: -O3 -w -pipe -arch i386 -arch x86_64
  LDFLAGS: -arch i386 -arch x86_64
  MAKEFLAGS: -j8
  
  Error: Failed executing: ./configure --prefix=/usr/local/Cellar/jpeg/8c --disable-dependency-tracking
  Please report this bug: https://github.com/mxcl/homebrew/wiki/new-issue
  These existing issues may help you:
  https://github.com/mxcl/homebrew/issues/#issue/4442
  It looks like an autotools configure failed.
  Consider re-running the install with '-vd' to keep 'config.log' around:
      brew install -vd jpeg
  Gist 'config.log' and any error output when reporting an issue.
  Remember to include your config information: brew --config
  
  Also try:
    `brew doctor` to check your setup for common problems.
    `brew missing` to check installed packages for missing deps.
  1961:~ Daniel$ brew doctor
  We couldn't detect gcc 4.2.x. Some formulae require this compiler.
  
  We couldn't detect gcc 4.0.x. Some formulae require this compiler.
  
  /usr/bin is in your PATH before Homebrew's bin. This means that system-
  provided programs will be used before Homebrew-provided ones. This is an
  issue if you install, for instance, Python.
  
  Consider editing your .bashrc to put:
    /usr/local/bin
  ahead of /usr/bin in your $PATH.
  
  Some brews install binaries to sbin instead of bin, but Homebrew's
  sbin was not found in your path.
  
  Consider editing your .bashrc to add:
    /usr/local/sbin
  to $PATH.
  
  "Git" was not found in your path.
  
  Homebrew uses Git for several internal functions, and some formulae
  use Git checkouts instead of stable tarballs.
  
  You may want to do:
    brew install git
  
  You have an "autoconf" in your path blocking the system version at:
  
  
  Custom autoconf in general and autoconf 2.66 in particular has issues
  and will cause some Homebrew formulae to fail.
  
  1961:~ Daniel$ brew install git
  ==&gt; Downloading http://kernel.org/pub/software/scm/git/git-1.7.5.tar.bz2
  ######################################################################## 100.0%
  ==&gt; make prefix=/usr/local/Cellar/git/1.7.5 install
  
  ==&gt; Exit Status: 1
  http://github.com/mxcl/homebrew/blob/master/Library/Formula/git.rb#L31
  ==&gt; Environment
  HOMEBREW_VERSION: 0.8
  HEAD: (none)
  HOMEBREW_PREFIX: /usr/local
  HOMEBREW_CELLAR: /usr/local/Cellar
  HOMEBREW_REPOSITORY: /usr/local
  HOMEBREW_LIBRARY_PATH: /usr/local/Library/Homebrew
  Hardware: 8-core 64-bit dunno
  OS X: 10.6.7
  Kernel Architecture: x86_64
  Ruby: 1.8.7-174
  /usr/bin/ruby =&gt; /System/Library/Frameworks/Ruby.framework/Versions/1.8/usr/bin/ruby
  Xcode: 
  GCC-4.0: N/A 
  GCC-4.2: N/A 
  LLVM: build 2335 
  MacPorts or Fink? false
  X11 installed? true
  ==&gt; Build Flags
  CC: /usr/bin/cc
  CXX: /usr/bin/c++
  LD: /usr/bin/cc
  CFLAGS: -O3 -w -pipe
  CXXFLAGS: -O3 -w -pipe
  MAKEFLAGS: -j8
  
  Error: Failed executing: make prefix=/usr/local/Cellar/git/1.7.5 install
  Please report this bug: https://github.com/mxcl/homebrew/wiki/new-issue
  
  Also try:
    `brew doctor` to check your setup for common problems.
    `brew missing` to check installed packages for missing deps.
  1961:~ Daniel$ brew missing
  1961:~ Daniel$ brew doctor
  We couldn't detect gcc 4.2.x. Some formulae require this compiler.
  
  We couldn't detect gcc 4.0.x. Some formulae require this compiler.
  
  /usr/bin is in your PATH before Homebrew's bin. This means that system-
  provided programs will be used before Homebrew-provided ones. This is an
  issue if you install, for instance, Python.
  
  Consider editing your .bashrc to put:
    /usr/local/bin
  ahead of /usr/bin in your $PATH.
  
  Some brews install binaries to sbin instead of bin, but Homebrew's
  sbin was not found in your path.
  
  Consider editing your .bashrc to add:
    /usr/local/sbin
  to $PATH.
  
  "Git" was not found in your path.
  
  Homebrew uses Git for several internal functions, and some formulae
  use Git checkouts instead of stable tarballs.
  
  You may want to do:
    brew install git
  
  You have an "autoconf" in your path blocking the system version at:
  
  
  Custom autoconf in general and autoconf 2.66 in particular has issues
  and will cause some Homebrew formulae to fail.
  </code></pre>