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copied!<p>This isn't exactly a programming question. Still...</p> <h2>Quick answer</h2> <p>The installer checks for OpenSSL support in two ways. The first check failed for you, the second succeeded. For me, the first check succeeded (see below). Either way works.</p> <h2>Longer answer</h2> <p>Here's what I got when I built it:</p> <pre><code>$ sudo apt-get install libssl-dev $ ./configure Checking for program g++ or c++ : /usr/bin/g++ Checking for program cpp : /usr/bin/cpp Checking for program ar : /usr/bin/ar Checking for program ranlib : /usr/bin/ranlib Checking for g++ : ok Checking for program gcc or cc : /usr/bin/gcc Checking for gcc : ok Checking for library dl : yes Checking for openssl : yes Checking for library rt : yes <---snip---> </code></pre> <p>Presuming you downloaded <a href="http://nodejs.org/dist/node-v0.2.3.tar.gz" rel="noreferrer">node.js v0.2.3</a> from <a href="http://nodejs.org/" rel="noreferrer">http://nodejs.org/</a>, the configuration is mostly done by <a href="http://code.google.com/p/waf/" rel="noreferrer">waf</a> in the file wscript.</p> <p>The relevant lines are:</p> <pre><code> if not Options.options.without_ssl: if conf.check_cfg(package='openssl', args='--cflags --libs', uselib_store='OPENSSL'): Options.options.use_openssl = conf.env["USE_OPENSSL"] = True conf.env.append_value("CPPFLAGS", "-DHAVE_OPENSSL=1") else: libssl = conf.check_cc(lib='ssl', header_name='openssl/ssl.h', function_name='SSL_library_init', libpath=['/usr/lib', '/usr/local/lib', '/opt/local/lib', '/usr/sfw/lib'], uselib_store='OPENSSL') libcrypto = conf.check_cc(lib='crypto', header_name='openssl/crypto.h', uselib_store='OPENSSL') </code></pre> <p>The first part is simple enough. It runs pkgconfig. Here is what happens when I do the equivalent by hand:</p> <pre><code> $ pkg-config openssl --cflags --libs -lssl -lcrypto </code></pre> <p>The second set of checks is run if pkg-config fails to confirm the package is installed. In that case, it tries to compile a trivial gcc program which checks for the existence of functions in libcrypt and libssl. If those both succeed, installation continues. If one of them fails, there's a fatal error, and the script bombs out.</p>

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