<html xmlns:v="urn:schemas-microsoft-com:vml" xmlns:o="urn:schemas-microsoft-com:office:office" xmlns:w="urn:schemas-microsoft-com:office:word" xmlns:m="http://schemas.microsoft.com/office/2004/12/omml" xmlns="http://www.w3.org/TR/REC-html40"><head><META HTTP-EQUIV="Content-Type" CONTENT="text/html; charset=us-ascii"><meta name=Generator content="Microsoft Word 15 (filtered medium)"><style><!--
/* Font Definitions */
@font-face
{font-family:"Cambria Math";
panose-1:2 4 5 3 5 4 6 3 2 4;}
@font-face
{font-family:DengXian;
panose-1:2 1 6 0 3 1 1 1 1 1;}
@font-face
{font-family:Calibri;
panose-1:2 15 5 2 2 2 4 3 2 4;}
@font-face
{font-family:"\@DengXian";
panose-1:2 1 6 0 3 1 1 1 1 1;}
/* Style Definitions */
p.MsoNormal, li.MsoNormal, div.MsoNormal
{margin:0in;
margin-bottom:.0001pt;
font-size:11.0pt;
font-family:"Calibri",sans-serif;}
a:link, span.MsoHyperlink
{mso-style-priority:99;
color:#0563C1;
text-decoration:underline;}
a:visited, span.MsoHyperlinkFollowed
{mso-style-priority:99;
color:#954F72;
text-decoration:underline;}
p.MsoListParagraph, li.MsoListParagraph, div.MsoListParagraph
{mso-style-priority:34;
margin-top:0in;
margin-right:0in;
margin-bottom:0in;
margin-left:.5in;
margin-bottom:.0001pt;
font-size:11.0pt;
font-family:"Calibri",sans-serif;}
p.msonormal0, li.msonormal0, div.msonormal0
{mso-style-name:msonormal;
mso-margin-top-alt:auto;
margin-right:0in;
mso-margin-bottom-alt:auto;
margin-left:0in;
font-size:12.0pt;
font-family:"Times New Roman",serif;}
span.EmailStyle19
{mso-style-type:personal;
font-family:"Times New Roman",serif;
color:#0070C0;}
span.EmailStyle20
{mso-style-type:personal-reply;
font-family:"Times New Roman",serif;
color:#0070C0;}
.MsoChpDefault
{mso-style-type:export-only;
font-size:10.0pt;}
@page WordSection1
{size:8.5in 11.0in;
margin:1.0in 1.0in 1.0in 1.0in;}
div.WordSection1
{page:WordSection1;}
--></style><!--[if gte mso 9]><xml>
<o:shapedefaults v:ext="edit" spidmax="1026" />
</xml><![endif]--><!--[if gte mso 9]><xml>
<o:shapelayout v:ext="edit">
<o:idmap v:ext="edit" data="1" />
</o:shapelayout></xml><![endif]--></head><body lang=EN-US link="#0563C1" vlink="#954F72"><div class=WordSection1><p class=MsoNormal><span style='font-size:12.0pt;font-family:"Times New Roman",serif;color:#0070C0'>Hello,<o:p></o:p></span></p><p class=MsoNormal><span style='font-size:12.0pt;font-family:"Times New Roman",serif;color:#0070C0'><o:p> </o:p></span></p><p class=MsoNormal><span style='font-size:12.0pt;font-family:"Times New Roman",serif;color:#0070C0'>I want to build Gmsh as a library (libgmsh.a) with OCC and API.<o:p></o:p></span></p><p class=MsoNormal><span style='font-size:12.0pt;font-family:"Times New Roman",serif;color:#0070C0'>Now I can successfully build the library with API and without OCC, and build and run demos from ‘t1’ to ‘t6’.<o:p></o:p></span></p><p class=MsoNormal><span style='font-size:12.0pt;font-family:"Times New Roman",serif;color:#0070C0'><o:p> </o:p></span></p><p class=MsoNormal><span style='font-size:12.0pt;font-family:"Times New Roman",serif;color:#0070C0'>Then I turn on the OCC option when building libgmsh.a. CMake can find the OpenCASCADE version information and libraries without any problem, and libgmsh.a seems built successfully. However, when I try to build the demo ‘boolean’, there are OCC linking errors. The first several lines are:<o:p></o:p></span></p><p class=MsoNormal><span style='font-size:12.0pt;font-family:"Times New Roman",serif;color:#0070C0'><o:p> </o:p></span></p><p class=MsoNormal style='margin-left:.5in'><span style='font-size:12.0pt;font-family:"Times New Roman",serif;color:#0070C0'>C:/dev/gmsh/occ/lib/libgmsh.a(GModelIO_OCC.cpp.obj):GModelIO_OCC.cpp:(.text+0x60): undefined reference to `Interface_Static::SetCVal(char const*, char const*)'<o:p></o:p></span></p><p class=MsoNormal style='margin-left:.5in'><span style='font-size:12.0pt;font-family:"Times New Roman",serif;color:#0070C0'>C:/dev/gmsh/occ/lib/libgmsh.a(GModelIO_OCC.cpp.obj):GModelIO_OCC.cpp:(.text+0xc8): undefined reference to `TopoDS_Shape::HashCode(int) const'<o:p></o:p></span></p><p class=MsoNormal style='margin-left:.5in'><span style='font-size:12.0pt;font-family:"Times New Roman",serif;color:#0070C0'>C:/dev/gmsh/occ/lib/libgmsh.a(GModelIO_OCC.cpp.obj):GModelIO_OCC.cpp:(.text+0xfc): undefined reference to `TopLoc_Location::IsEqual(TopLoc_Location const&) const'<o:p></o:p></span></p><p class=MsoNormal style='margin-left:.5in'><span style='font-size:12.0pt;font-family:"Times New Roman",serif;color:#0070C0'>C:/dev/gmsh/occ/lib/libgmsh.a(GModelIO_OCC.cpp.obj):GModelIO_OCC.cpp:(.text+0x135): undefined reference to `TopoDS_Shape::HashCode(int) const'<o:p></o:p></span></p><p class=MsoNormal style='margin-left:.5in'><span style='font-size:12.0pt;font-family:"Times New Roman",serif;color:#0070C0'>C:/dev/gmsh/occ/lib/libgmsh.a(GModelIO_OCC.cpp.obj):GModelIO_OCC.cpp:(.text+0x169): undefined reference to `TopLoc_Location::IsEqual(TopLoc_Location const&) const'<o:p></o:p></span></p><p class=MsoNormal style='margin-left:.5in'><span style='font-size:12.0pt;font-family:"Times New Roman",serif;color:#0070C0'>…<o:p></o:p></span></p><p class=MsoNormal><span style='font-size:12.0pt;font-family:"Times New Roman",serif;color:#0070C0'><o:p> </o:p></span></p><p class=MsoNormal><span style='font-size:12.0pt;font-family:"Times New Roman",serif;color:#0070C0'>What might be the problem?<o:p></o:p></span></p><p class=MsoNormal><span style='font-size:12.0pt;font-family:"Times New Roman",serif;color:#0070C0'><o:p> </o:p></span></p><p class=MsoNormal><span style='font-size:12.0pt;font-family:"Times New Roman",serif;color:#0070C0'>I build everything (OCC libraries, libgmsh.a, and boolean.exe) using C++ compiler x86_64-w64-mingw32-g++.<o:p></o:p></span></p><p class=MsoNormal><span style='font-size:12.0pt;font-family:"Times New Roman",serif;color:#0070C0'><o:p> </o:p></span></p><p class=MsoNormal><span style='font-size:12.0pt;font-family:"Times New Roman",serif;color:#0070C0'>Thank you.<o:p></o:p></span></p><p class=MsoNormal><span style='font-size:12.0pt;font-family:"Times New Roman",serif;color:#0070C0'><o:p> </o:p></span></p><p class=MsoNormal><span style='font-size:12.0pt;font-family:"Times New Roman",serif;color:#0070C0'>Sam<o:p></o:p></span></p></div><div id="DAB4FAD8-2DD7-40BB-A1B8-4E2AA1F9FDF2"><br />
<table style="border-top: 1px solid #D3D4DE;">
<tr>
<td style="width: 55px; padding-top: 13px;"><a href="https://www.avast.com/sig-email?utm_medium=email&utm_source=link&utm_campaign=sig-email&utm_content=emailclient&utm_term=icon" target="_blank"><img src="https://ipmcdn.avast.com/images/icons/icon-envelope-tick-round-orange-animated-no-repeat-v1.gif" alt="" width="46" height="29" style="width: 46px; height: 29px;" /></a></td>
<td style="width: 470px; padding-top: 12px; color: #41424e; font-size: 13px; font-family: Arial, Helvetica, sans-serif; line-height: 18px;">Virus-free. <a href="https://www.avast.com/sig-email?utm_medium=email&utm_source=link&utm_campaign=sig-email&utm_content=emailclient&utm_term=link" target="_blank" style="color: #4453ea;">www.avast.com</a>
</td>
</tr>
</table><a href="#DAB4FAD8-2DD7-40BB-A1B8-4E2AA1F9FDF2" width="1" height="1"> </a></div></body></html>