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<div name="messageBodySection" style="font-size: 14px; font-family: -apple-system, BlinkMacSystemFont, sans-serif;">Hi,
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<div>To manage specific flags for ar command, you can rely on rules override (see variable <a href="https://cmake.org/cmake/help/latest/variable/CMAKE_USER_MAKE_RULES_OVERRIDE.html">CMAKE_USER_MAKE_RULES_OVERRIDE</a> and <a href="https://cmake.org/cmake/help/latest/variable/CMAKE_USER_MAKE_RULES_OVERRIDE_LANG.html">CMAKE_USER_MAKE_RULES_OVERRIDE_<LANG></a>).</div>
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<div>I have attached some example I used in the past to manage cleanly 32 and 64 bits builds on AIX.</div>
<div>And to use these files, set variable CMAKE_USER_MAKE_RULES_OVERRIDE_CXX <b>before</b> the project command:</div>
<div>...</div>
<div>set (CMAKE_USER_MAKE_RULES_OVERRIDE_CXX /to/path/${CMAKE_CXX_COMPILER_ID}-CXX-Override.cmake)</div>
<div>…</div>
<div>project (…)</div>
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<div>To create an archive holding the shared object may be the most efficient is to create a script (bash or Make script is OK) to do both actions and override variable CMAKE_CXX_CREATE_SHARED_LIBRARY:</div>
<div>set(CMAKE_CXX_CREATE_SHARED_LIBRARY<br />
« /to/my/link/script <TARGET> <CMAKE_CXX_COMPILER> <CMAKE_SHARED_LIBRARY_CXX_FLAGS> <LANGUAGE_COMPILE_FLAGS> <LINK_FLAGS> <CMAKE_SHARED_LIBRARY_CREATE_CXX_FLAGS> <SONAME_FLAG><TARGET_SONAME> -o <OBJECT_DIR>/shr.so <OBJECTS> <LINK_LIBRARIES>)<br /></div>
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<div name="messageReplySection" style="font-size: 14px; font-family: -apple-system, BlinkMacSystemFont, sans-serif;">Le 17 déc. 2018 à 23:07 +0100, Rob Boehne <robb@datalogics.com>, a écrit :<br />
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<p class="MsoNormal"><span style="font-size:11.0pt">AIX supports two types of shared libraries, AIX-style, and System 5 (SYSV) compatibility libraries. CMake is currently set up to exclusively work with SYSV-style (read the ld man pages for -brtl).</span></p>
<p class="MsoNormal"><span style="font-size:11.0pt">To do this I’m attempting to set the commands to override linking shared libraries. The default setup forces generating an exports list, which also gives me problems because I explicitly provide one (that is then overridden by the generated list, which comes out empty in my case). The set commands below almost work, one of the problems is that I can’t see any way to pass flags to commands like “/bin/ar”. Under AIX, tools like ar, nm, etc. have a strict “object file mode” that can be altered with the -X command line argument. I couldn’t find any place to pass -X64 or -X32 to /bin/ar, and setting CMAKE_AR with a space in it results in CMAKE_AR==”/bin/ar;-X64” which is not what I want. Adding double quotes fails because they aren’t escaped, so the command ends up being sent with argv[0]==”/bin/ar -X64” which fails. Escaping the space like you see below results in the same behavior. I don’t have any static archives in the project, but I’m pretty sure there would be problems with them. I want to create the output of the first command to look like the target filename but with a file extension of “so” rather than “a” but I don’t see any way to do that.</span></p>
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<p class="MsoNormal"><span style="font-size:11.0pt"> elseif("${CMAKE_SYSTEM_NAME}" STREQUAL "AIX")</span></p>
<p class="MsoNormal"><span style="font-size:11.0pt"> if(${CMAKE_CXX_COMPILER_ID} STREQUAL "XL")</span></p>
<p class="MsoNormal"><span style="font-size:11.0pt"> if(CMAKE_SIZEOF_VOID_P MATCHES "8")</span></p>
<p class="MsoNormal"><span style="font-size:11.0pt"> set(CMAKE_AR /bin/ar\ -X64)</span></p>
<p class="MsoNormal"><span style="font-size:11.0pt"> else()</span></p>
<p class="MsoNormal"><span style="font-size:11.0pt"> set(CMAKE_AR /bin/ar\ -X32)</span></p>
<p class="MsoNormal"><span style="font-size:11.0pt"> endif()</span></p>
<p class="MsoNormal"><span style="font-size:11.0pt"> # override the broken commands cmake uses to build shared libs on AIX with XLC</span></p>
<p class="MsoNormal"><span style="font-size:11.0pt"> set(CMAKE_SHARED_LIBRARY_SUFFIX ".a")</span></p>
<p class="MsoNormal"><span style="font-size:11.0pt"> set(CMAKE_SHARED_LIBRARY_LINK_CXX_FLAGS "")</span></p>
<p class="MsoNormal"><span style="font-size:11.0pt"> set(CMAKE_SHARED_LINKER_FLAGS_INIT "")</span></p>
<p class="MsoNormal"><span style="font-size:11.0pt"> set(CMAKE_EXTRA_SHARED_LIBRARY_SUFFIXES ".so")</span></p>
<p class="MsoNormal"><span style="font-size:11.0pt"> set(CMAKE_SHARED_LIBRARY_CREATE_CXX_FLAGS "-bM:SRE -bnoentry")</span></p>
<p class="MsoNormal"><span style="font-size:11.0pt"> set(CMAKE_CXX_CREATE_SHARED_LIBRARY</span></p>
<p class="MsoNormal"><span style="font-size:11.0pt"> "<CMAKE_CXX_COMPILER> <CMAKE_SHARED_LIBRARY_CXX_FLAGS> <LANGUAGE_COMPILE_FLAGS> <LINK_FLAGS> <CMAKE_SHARED_LIBRARY_CREATE_CXX_FLAGS> <SONAME_FLAG><TARGET_SONAME> -o <OBJECT_DIR>/shr.so <OBJECTS> <LINK_LIBRARIES>;<CMAKE_AR> -cru <TARGET> <OBJECT_DIR>/shr.so"</span></p>
<p class="MsoNormal"><span style="font-size:11.0pt"> )</span></p>
<p class="MsoNormal"><span style="font-size:11.0pt"> </span></p>
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<p class="MsoNormal" align="center" style="text-align:center;text-autospace:none"><span style="font-size:11.0pt"><img width="87" height="87" style="width:.9062in;height:.9062in" id="Picture_x0020_1" src="cid:CDC7B71C5C07488EBC57ECC24B80DA5D" alt="cid:image002.png@01D3D0E3.DCFE6710" class="existing-inline-image" /></span></p>
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<p class="MsoNormal" style="text-autospace:none"><b><span style="font-size:11.0pt;font-family:"Arial",sans-serif;color:#E83C21">Rob Boehne</span></b><span style="font-size:11.0pt"></span></p>
<p class="MsoNormal" style="text-autospace:none"><span style="font-size:10.0pt;font-family:"Arial",sans-serif">Senior Software Architect | Datalogics, Inc.</span><span style="font-size:11.0pt"></span></p>
<p class="MsoNormal" style="text-autospace:none"><span style="font-size:11.0pt"><a href="tel:(312)%20853-8351"><span style="font-size:10.0pt;font-family:"Arial",sans-serif;color:#0B4CB4">+1.312.853.8351</span></a></span><span style="font-size:10.0pt;font-family:"Arial",sans-serif"> | <a href="mailto:robb@datalogics.com"><span style="color:#0B4CB4">robb@datalogics.com</span></a></span><span style="font-size:11.0pt"></span></p>
<p class="MsoNormal" style="text-autospace:none"><span style="font-size:11.0pt"><a href="http://www.datalogics.com/"><span style="font-size:10.0pt;font-family:"Arial",sans-serif;color:#0B4CB4">datalogics.com</span></a></span><span style="font-size:10.0pt;font-family:"Arial",sans-serif"> | <a href="http://blogs.datalogics.com/"><span style="color:#0B4CB4">blogs.datalogics.com</span></a></span><span style="font-size:11.0pt"></span></p>
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