<html><head><base href="x-msg://7/"></head><body style="word-wrap: break-word; -webkit-nbsp-mode: space; -webkit-line-break: after-white-space; "><br><div><div>On 17 Jan 2014, at 21:14, Fred van Stappen wrote:</div><br class="Apple-interchange-newline"><blockquote type="cite"><span class="Apple-style-span" style="border-collapse: separate; font-family: Helvetica; font-style: normal; font-variant: normal; font-weight: normal; letter-spacing: normal; line-height: normal; orphans: 2; text-align: -webkit-auto; text-indent: 0px; text-transform: none; white-space: normal; widows: 2; word-spacing: 0px; -webkit-border-horizontal-spacing: 0px; -webkit-border-vertical-spacing: 0px; -webkit-text-decorations-in-effect: none; -webkit-text-size-adjust: auto; -webkit-text-stroke-width: 0px; font-size: medium; "><div class="hmmessage" style="font-size: 12pt; font-family: Calibri; "><div dir="ltr">>Ha, then you use/compiled a different version. Since a `extern "C"` preserves<br>> the symbol name (that is the trick I use to link in a lot of external C++ code:<br>>just put extern "C" in front of the symbol). or it could be that I am completely<br>>missing something here. [for example: is the symbol `DLL_EXPORTS` defined at compile time?]<br><br>Hum, "just put extern "C" in front of the symbol" (no capito ;-( )<br></div></div></span></blockquote><div><br></div>What I'm trying to say is that if there is `extern "C"` in front of a symbol, C++ won't mangle the name. In the cpp file you attached in one of your previous mails, [assuming a C++ compiler] this is the case as per the expansion of the macro `SOUNDTOUCHDLL_API`; on one condition: that `DLL_EXPORTS` is defined.</div><div><br></div><div>[hint: read ahead to the second part first as it might just solve your problem]</div><div><br></div><div>Since you see mangled names, there must be an error or version mismatch somewhere in your build of the library. So I thought that perhaps you are using a compiled version of the library that still uses stdcall instead of cdecl.</div><div><br></div><div>To get closer to the bug, try the following:</div><div><span class="Apple-tab-span" style="white-space:pre"> </span>- Compile with debug symbols everwhere (there is no such thing as overkill ;-) )</div><div><span class="Apple-tab-span" style="white-space:pre"> </span>- Run your program in gdb and get a backtrace (`bt` on the command line of gdb), if the crash occurs at the end of the function in the library, or just after the call, then it might be a calling convention issue. If I am informed correctly (see <a href="http://stackoverflow.com/questions/3404372/stdcall-and-cdecl">http://stackoverflow.com/questions/3404372/stdcall-and-cdecl</a>) then the difference between stdcall and cdecl lies in who cleans up the stack. A mismatch results in the stack being cleaned up twice or not at all. Both rather inconvenient to normal program flow. If this is the case, try changing calling conventions.</div><div><br></div><div><br></div><div><blockquote type="cite"><span class="Apple-style-span" style="border-collapse: separate; font-style: normal; font-variant: normal; font-weight: normal; letter-spacing: normal; line-height: normal; orphans: 2; text-align: -webkit-auto; text-indent: 0px; text-transform: none; white-space: normal; widows: 2; word-spacing: 0px; -webkit-border-horizontal-spacing: 0px; -webkit-border-vertical-spacing: 0px; -webkit-text-decorations-in-effect: none; -webkit-text-size-adjust: auto; -webkit-text-stroke-width: 0px; "><div class="hmmessage"><div dir="ltr"><span id="sites-admin-attach-title-wuid:gx:6c8923efcd73c0e" style="font-family: Calibri; font-size: 12pt; "><font class="Apple-style-span" color="#000000"><br></font>PS2 : We gonna get it, im sure...<br></span></div></div></span></blockquote></div><div><br></div><div>[The Second Part -->] Well, it seems I have found something interresting here (as already suggested by Marco); you don't define THandle in your library wrapper. THandle is defined as a longint (<a href="http://www.freepascal.org/docs-html/rtl/system/thandle.html">http://www.freepascal.org/docs-html/rtl/system/thandle.html</a>), but you need a pointer.</div><div><br></div><div>Try putting `Type THandle = pointer;` somewhere before the first usage of this type in your library wrapper.</div><br><div>
<span class="Apple-style-span" style="border-collapse: separate; color: rgb(0, 0, 0); font-family: Helvetica; font-style: normal; font-variant: normal; font-weight: normal; letter-spacing: normal; line-height: normal; orphans: 2; text-align: -webkit-auto; text-indent: 0px; text-transform: none; white-space: normal; widows: 2; word-spacing: 0px; -webkit-border-horizontal-spacing: 0px; -webkit-border-vertical-spacing: 0px; -webkit-text-decorations-in-effect: none; -webkit-text-size-adjust: auto; -webkit-text-stroke-width: 0px; font-size: medium; "><span class="Apple-style-span" style="border-collapse: separate; color: rgb(0, 0, 0); font-family: Helvetica; font-style: normal; font-variant: normal; font-weight: normal; letter-spacing: normal; line-height: normal; orphans: 2; text-align: -webkit-auto; text-indent: 0px; text-transform: none; white-space: normal; widows: 2; word-spacing: 0px; -webkit-border-horizontal-spacing: 0px; -webkit-border-vertical-spacing: 0px; -webkit-text-decorations-in-effect: none; -webkit-text-size-adjust: auto; -webkit-text-stroke-width: 0px; font-size: medium; "><div style="word-wrap: break-word; -webkit-nbsp-mode: space; -webkit-line-break: after-white-space; "><span class="Apple-style-span" style="border-collapse: separate; font-family: Helvetica; font-variant: normal; font-weight: normal; letter-spacing: normal; line-height: normal; orphans: 2; text-align: -webkit-auto; text-indent: 0px; text-transform: none; white-space: normal; widows: 2; word-spacing: 0px; -webkit-border-horizontal-spacing: 0px; -webkit-border-vertical-spacing: 0px; -webkit-text-decorations-in-effect: none; -webkit-text-size-adjust: auto; -webkit-text-stroke-width: 0px; "><div style="word-wrap: break-word; -webkit-nbsp-mode: space; -webkit-line-break: after-white-space; "><span class="Apple-style-span" style="border-collapse: separate; font-family: Helvetica; font-variant: normal; font-weight: normal; letter-spacing: normal; line-height: normal; orphans: 2; text-align: -webkit-auto; text-indent: 0px; text-transform: none; white-space: normal; widows: 2; word-spacing: 0px; -webkit-border-horizontal-spacing: 0px; -webkit-border-vertical-spacing: 0px; -webkit-text-decorations-in-effect: none; -webkit-text-size-adjust: auto; -webkit-text-stroke-width: 0px; "><div style="word-wrap: break-word; -webkit-nbsp-mode: space; -webkit-line-break: after-white-space; "><span class="Apple-style-span" style="border-collapse: separate; font-family: Helvetica; font-variant: normal; font-weight: normal; letter-spacing: normal; line-height: normal; orphans: 2; text-align: -webkit-auto; text-indent: 0px; text-transform: none; white-space: normal; widows: 2; word-spacing: 0px; -webkit-border-horizontal-spacing: 0px; -webkit-border-vertical-spacing: 0px; -webkit-text-decorations-in-effect: none; -webkit-text-size-adjust: auto; -webkit-text-stroke-width: 0px; "><div style="word-wrap: break-word; -webkit-nbsp-mode: space; -webkit-line-break: after-white-space; "><div style="font-size: medium; color: rgb(0, 0, 0); font-style: normal; ">--</div><div style="font-size: medium; color: rgb(0, 0, 0); font-style: normal; ">Ewald</div></div></span></div></span></div></span></div></span></span>
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