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POSCons, Boost::ASIO, Windows Precompiled Headers, and Linker Errors
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  1. POSCons, Boost::ASIO, Windows Precompiled Headers, and Linker Errors
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    copied!<p>I'm investigating using SCons for our build process as we develop C++ for multiple platforms. I'm 99% of the way there in the build configuration, but I'm running into a <em>VERY</em> strange error on Windows having to do with the precompiled header file. Even stranger still is that it only happens on one project.</p> <p>In the SConscript file for this project, I have the following to compile the PCH on windows:</p> <pre><code>if env['PLATFORM'] == 'win32': env['PCH'] = env.PCH('MyPCH-LSCommon.pch', 'Common/src/MyPCH.h')[0] env['PCHSTOP'] = '"MyPCH.h"' </code></pre> <p>I also have a compiler flag set to force include MyPCH.h on all files in the project:</p> <pre><code>if env['PLATFORM'] == 'win32': cxxflags = [ '/FI"MyPCH.h"' ] </code></pre> <p>Everything goes along and compiles absolutely fine. It isn't until the final DLL link stage that I get pages and pages of linker errors such as the following:</p> <pre><code>error LNK2001: unresolved external symbol "private: static class boost::asio::detail::tss_ptr&lt;class boost::asio::detail::call_stack&lt;class boost::asio::detail::win_iocp_io_service&gt;::context&gt; boost::asio::detail::call_stack&lt;class boost::asio::detail::win_iocp_io_service&gt;::top_" (?top_@?$call_stack@Vwin_iocp_io_service@detail@asio@boost@@@detail@asio@boost@@0V?$tss_ptr@ Vcontext@?$call_stack@Vwin_iocp_io_service@detail@asio@boost@@@detail@asio@boost@@@234@A) </code></pre> <p>and:</p> <pre><code> error LNK2001: unresolved external symbol "private: static class boost::asio::detail::winsock_init&lt;2,0&gt; boost::asio::detail::winsock_init&lt;2,0&gt;::instance_" (?instance_@?$winsock_init@$01$0A@@detail@asio@boost@@0V1234@A) </code></pre> <p>This is puzzling because none of the classes that I'm getting link warnings from don't even use boost::asio, although it is included in the precompiled header file and up the chain in some #includes.</p> <p>Even more puzzling is that if I disable compilation of the precompiled header file, yet still force it's include, everything compiles and links just fine. It just takes freaking forever.</p> <p>Does anyone have a clue as to what could be causing these linker errors?</p> <p>Thanks in advance.</p> <p>--- EDIT ---</p> <p>Here's the command line that SCons is spitting out for building the PCH (Minus Include Paths):</p> <pre><code> cl /nologo /W4 /Od /RTC1 /MDd /TP /EHsc /FD /RTC1 /RTCc /Gy /openmp /TP /Fd"\vc80.pdb" /nologo /Wp64 /wd4231 /wd4616 /errorReport:prompt /Zm256 /MDd /Od /FI"CedrusPCH.h" /DOS_WINDOWS=OS_WINDOWS /D_WIN32 /DWIN32 /D_WIN32_WINNT=0X500 /D_WINDOWS /D_UNICODE /DBOOST_ALL_DYN_LINK /DBOOST_REGEX_DYN_LINK /DBOOST_LIB_DIAGNOSTIC /D_VC80_UPGRADE=0x710 /DUNICODE /DWXUSINGDLL /DwxUSE_SERVICE_DISCOVERY=1 /D_DEBUG /D_DEBUG /DSL_ENABLE_NETWORKING=1 /DWXMAKINGDLL_LSCOMMON /DSLSDK_USEDLL /c C:\Projects\licenser\Common\src\CedrusPCH.h /Foscons-out\dbg\obj\CedrusPCH-LSCommon.obj /Yc"CedrusPCH.h" /Fpscons-out\dbg\obj\CedrusPCH-LSCommon.pch /ZI CedrusPCH.h </code></pre> <p>Here's the command line for a file being compiled (again minus include paths):</p> <pre><code>cl /Foscons-out\dbg\obj\Licenser\src\secure\windows_crypto \PlatformCryptoKeyProvider_wincrypt.obj /c C:\Projects\licenser\Licenser\src\secure \windows_crypto\PlatformCryptoKeyProvider_wincrypt.cpp /nologo /W4 /Od /RTC1 /MDd /TP /EHsc /FD /RTC1 /RTCc /Gy /openmp /TP /Fd"\vc80.pdb" /nologo /Wp64 /wd4231 /wd4616 /errorReport:prompt /Zm256 /MDd /Od /FI"CedrusPCH.h" /nologo /W4 /Od /RTC1 /MDd /DOS_WINDOWS=OS_WINDOWS /D_WIN32 /DWIN32 /D_WIN32_WINNT=0X500 /D_WINDOWS /D_UNICODE /DBOOST_ALL_DYN_LINK /DBOOST_REGEX_DYN_LINK /DBOOST_LIB_DIAGNOSTIC /D_VC80_UPGRADE=0x710 /DUNICODE /DWXUSINGDLL /DwxUSE_SERVICE_DISCOVERY=1 /D_DEBUG /D_DEBUG /DSL_ENABLE_NETWORKING=1 /DWXMAKINGDLL_LSCOMMON /DSLSDK_USEDLL /D_USRDLL /D_WINDLL /Yu"CedrusPCH.h" /Fpscons-out\dbg\obj\CedrusPCH-LSCommon.pch /ZI PlatformCryptoKeyProvider_wincrypt.cpp </code></pre> <p>And finally, here's the link command line:</p> <pre><code>link /nologo /MACHINE:X86 /DEBUG -manifest /dll /out:scons-out\dbg\obj\LSCommon.dll /implib:scons-out\dbg\obj\LSCommon.lib /LIBPATH:scons-out\dbg\lib /LIBPATH:C:\Projects\licenser\scons-out\dbg\lib /LIBPATH:scons-out\dbg\obj /LIBPATH:. /LIBPATH:C:\Projects\licenser /LIBPATH:C:\Projects\licenser\scons-out\dbg\obj /LIBPATH:C:\Projects\wxWidgets\lib\vc_dll_vc8 /LIBPATH:C:\Projects\boost\install\lib "/LIBPATH:C:\Program Files\Microsoft Platform SDK for Windows Server 2003 R2\Lib" "/LIBPATH:C:\Program Files\Bonjour SDK\lib\win32" unicows.lib winmm.lib comctl32.lib rpcrt4.lib ws2_32.lib oleacc.lib kernel32.lib user32.lib gdi32.lib winspool.lib comdlg32.lib advapi32.lib shell32.lib oleacc.lib ole32.lib oleaut32.lib uuid.lib odbc32.lib odbccp32.lib boost_signals-vc80-mt-gd-1_39.lib boost_system-vc80-mt-gd-1_39.lib boost_date_time-vc80-mt-gd-1_39.lib boost_regex-vc80-mt-gd-1_39.lib boost_wserialization-vc80-mt-gd-1_39.lib boost_serialization-vc80-mt-gd-1_39.lib boost_thread-vc80-mt-gd-1_39.lib wxbase28ud.lib wxbase28ud_net.lib wxbase28ud_xml.lib wxmsw28ud_adv.lib wxmsw28ud_aui.lib wxmsw28ud_core.lib wxmsw28ud_html.lib wxmsw28ud_qa.lib wxmsw28ud_richtext.lib wxmsw28ud_xrc.lib LSBase.lib disphelper.lib Crypt32.lib /PDB:scons-out\dbg\obj\LSCommon.pdb /DEBUG scons-out\dbg\obj\Licenser\src\dll_template_instantiation_export_LSCommon.obj scons-out\dbg\obj\Licenser\src\secure\ConcreteMessageSigningAlgorithm_DSA_with_SHA1.obj scons-out\dbg\obj\Licenser\src\secure\CryptoObjectFactory.obj scons-out\dbg\obj\Licenser\src\secure\EntropyCalculation.obj scons-out\dbg\obj\Licenser\src\data\LSAccount.obj scons-out\dbg\obj\Licenser\src\data\LSAccountHistory.obj scons-out\dbg\obj\Licenser\src\server_daemon\LSAccountHistoryRequestPacket.obj scons-out\dbg\obj\Licenser\src\server_daemon\LSAccountRequestPacket.obj scons-out\dbg\obj\Licenser\src\data\LSActivation.obj scons-out\dbg\obj\Licenser\src\server_daemon\LSActivationRequestPacket.obj scons-out\dbg\obj\Licenser\src\data\LSBlob.obj scons-out\dbg\obj\Licenser\src\data\LSCompositePrimaryKey.obj scons-out\dbg\obj\Licenser\src\data\LSDatabaseElementBase.obj scons-out\dbg\obj\Licenser\src\server_daemon\LSDoActivateReplyPacket.obj scons-out\dbg\obj\Licenser\src\server_daemon\LSDoActivateRequestPacket.obj scons-out\dbg\obj\Licenser\src\server_daemon\LSDoManualActivateReplyPacket.obj scons-out\dbg\obj\Licenser\src\server_daemon\LSDoManualActivateRequestPacket.obj scons-out\dbg\obj\Licenser\src\data\LSLicense.obj scons-out\dbg\obj\Licenser\src\data\LSLicenseHistory.obj scons-out\dbg\obj\Licenser\src\server_daemon\LSLicenseHistoryRequestPacket.obj scons-out\dbg\obj\Licenser\src\server_daemon\LSLicenseRequestPacket.obj scons-out\dbg\obj\Licenser\src\server_daemon\LSLoginReplyPacket.obj scons-out\dbg\obj\Licenser\src\server_daemon\LSLoginRequestPacket.obj scons-out\dbg\obj\Licenser\src\data\LSMachine.obj scons-out\dbg\obj\Licenser\src\server_daemon\LSMachineRequestPacket.obj scons-out\dbg\obj\Licenser\src\server_daemon\LSNet.obj scons-out\dbg\obj\Licenser\src\data\LSPhyActivation.obj scons-out\dbg\obj\Licenser\src\data\deprecated_streamables\LSPhyActivation_LegacyStreamingHelper.obj scons-out\dbg\obj\Licenser\src\data\LSPrimaryKey.obj scons-out\dbg\obj\Licenser\src\data\LSPrimaryKeyDefinitions.obj scons-out\dbg\obj\Licenser\src\data\LSProduct.obj scons-out\dbg\obj\Licenser\src\data\LSProductHistory.obj scons-out\dbg\obj\Licenser\src\server_daemon\LSProductHistoryRequestPacket.obj scons-out\dbg\obj\Licenser\src\server_daemon\LSProductRequestPacket.obj scons-out\dbg\obj\Licenser\src\data\LSSimplePrimaryKey.obj scons-out\dbg\obj\Licenser\src\data\LSUser.obj scons-out\dbg\obj\Licenser\src\data\LSUserHistory.obj scons-out\dbg\obj\Licenser\src\server_daemon\LSUserHistoryRequestPacket.obj scons-out\dbg\obj\Licenser\src\server_daemon\LSUserRequestPacket.obj scons-out\dbg\obj\Licenser\src\server_daemon\streaming_versioning\StreamableClassInfoVersionTranslator.obj scons-out\dbg\obj\Licenser\src\data\deprecated_streamables\LSProduct_deprecated_v_2.obj scons-out\dbg\obj\Licenser\src\secure\deprecated_streamables\DSA.obj scons-out\dbg\obj\Licenser\src\secure\deprecated_streamables\DSAKeyPair.obj scons-out\dbg\obj\Licenser\src\secure\deprecated_streamables\DSAPublicKey.obj scons-out\dbg\obj\Licenser\src\secure\deprecated_streamables\Hash.obj scons-out\dbg\obj\Licenser\src\secure\deprecated_streamables\SHA1.obj scons-out\dbg\obj\Licenser\src\server_daemon\LSActivationApprovalStrategy.obj scons-out\dbg\obj\Licenser\src\data\LSDatabaseElementT.obj scons-out\dbg\obj\Licenser\src\data\LSPairPrimaryKeyT.obj scons-out\dbg\obj\Licenser\src\data\LSSimplePrimaryKeyT.obj scons-out\dbg\obj\Licenser\src\secure\windows_crypto\PlatformCryptoKeyProvider_wincrypt.obj scons-out\dbg\obj\Licenser\src\secure\windows_crypto\Scoped_RAII_AutoReleaseWincryptHandleFactory.obj </code></pre> <p>Also, the PCH header isn't explicitly included by each individual file, but on the command line options, I have /FI that force includes the PCH on every file compiled in the project.</p>
 

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