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<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D">The header is irrelevant to linking, unless it contains macros that change the names of external symbols.<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D">My guess is that you need -L/usr/local/openssl/lib, or something along those lines, on your gcc command line. I suspect you're linking against normal OpenSSL
libraries installed elsewhere on your system, and not against the ones you built.<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D">This is not specific to OpenSSL, by the way; it's all standard UNIX / Linux library use.<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="font-size:9.0pt;font-family:"Courier New";color:black">Michael Wojcik</span><span style="font-size:9.0pt;font-family:"Calibri","sans-serif";color:#1F497D">
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</span><span style="font-size:9.0pt;font-family:"Courier New";color:black">Distinguished Engineer</span><span style="font-size:9.0pt;font-family:"Courier New";color:black">, Micro Focus</span><span style="font-size:9.0pt;font-family:"Calibri","sans-serif";color:#1F497D">
</span><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D"><o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D"><o:p> </o:p></span></p>
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<p class="MsoNormal"><b><span style="font-size:10.0pt;font-family:"Tahoma","sans-serif"">From:</span></b><span style="font-size:10.0pt;font-family:"Tahoma","sans-serif""> openssl-users [mailto:openssl-users-bounces@openssl.org]
<b>On Behalf Of </b>Schmicker, Robert<br>
<b>Sent:</b> Thursday, December 29, 2016 21:38<br>
<b>To:</b> openssl-users@openssl.org<br>
<b>Subject:</b> [openssl-users] Linker error when adding new cipher to crypto folder<o:p></o:p></span></p>
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<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">Hello, <o:p></o:p></p>
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<p class="MsoNormal"><o:p> </o:p></p>
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<p class="MsoNormal">I am attempting to add a new cipher into the crypto library. I have done the following so far…<o:p></o:p></p>
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<p class="MsoNormal"><o:p> </o:p></p>
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<p class="MsoNormal">1. Added my code to the openssl/crypto folder<o:p></o:p></p>
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<p class="MsoNormal">2. Created a <a href="http://build.info">build.info</a> for make to compile my code (created this based off of openssl/crypto/dh’s <a href="http://build.info">build.info</a>)<o:p></o:p></p>
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<p class="MsoNormal">3. Added my cipher name to the list of ciphers to compile in Configure<o:p></o:p></p>
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<p class="MsoNormal">4. Compiled and installed all code without errors and object files for my new cipher are created in openssl/crypto/mycipher/<o:p></o:p></p>
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<p class="MsoNormal">5. Created a test.c file that verifies that the library is installed and working properly by generating a MD5 hash of a string<o:p></o:p></p>
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<p class="MsoNormal">Compiled as:<o:p></o:p></p>
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<p class="MsoNormal">gcc test.c -I/usr/local/openssl/include/openssl/ -o test -lcrypto -lssl -Wall<o:p></o:p></p>
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<p class="MsoNormal">6. I am able to properly include <openssl/mycipher.h> in my test.c file<o:p></o:p></p>
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<p class="MsoNormal"><o:p> </o:p></p>
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<p class="MsoNormal">However, as soon as I make a call to my cipher in test.c I get a linker error and gcc is unable to find any of my functions.<o:p></o:p></p>
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<p class="MsoNormal"><o:p> </o:p></p>
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<p class="MsoNormal">It seems that the header file I have in the openssl/include folder isn’t being linked somehow to my code in the openssl/cypto folder.<o:p></o:p></p>
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<p class="MsoNormal"><o:p> </o:p></p>
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<p class="MsoNormal">I feel like I’m missing a step here…<o:p></o:p></p>
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<p class="MsoNormal"><o:p> </o:p></p>
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<p class="MsoNormal">Any help is much appreciated!<o:p></o:p></p>
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<p class="MsoNormal"><o:p> </o:p></p>
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<p class="MsoNormal">Rob<o:p></o:p></p>
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