Cross-compiling to Windows with MinGW

[marlam]

I'm trying to cross-compile Equalizer for Windows on Ubuntu, using Mingw-cross-env.

There are a few minor problems regarding upper-/lowercase, missing includes, and one clash of a variable name with some header definition. I have a patch that fixes these; I'll try to attach it to this issue (not sure yet how this works on github).

But now I'm stuck with a problem when linking libEqualizerServer:

Linking CXX shared library ../../bin/libEqualizerServer.dll
Creating library file: libEqualizerServer.dll.a
CMakeFiles/lib_EqualizerServer_shared.dir/objects.a(channel.cpp.obj):channel.cpp:(.text$ZN2eq6fabric7ChannelINS_6server6WindowENS2_7ChannelEEC2ERKS5[eq::fabric::Channel<eq::server::Window, eq::server::Channel>::Channel(eq::fabric::Channel<eq::server::Window, eq::server::Channel> const&)]+0x61): undefined reference to vtable for eq::fabric::Object' CMakeFiles/lib_EqualizerServer_shared.dir/objects.a(channel.cpp.obj):channel.cpp:(.text$_ZN2eq6fabric7ChannelINS_6server6WindowENS2_7ChannelEEC1ERKS5_[eq::fabric::Channel<eq::server::Window, eq::server::Channel>::Channel(eq::fabric::Channel<eq::server::Window, eq::server::Channel> const&)]+0x61): undefined reference tovtable for eq::fabric::Object'

I tried to link with eq_fabric to solve this, but I don't know how this works with CMake, and somehow I think that this should not be done anyway.

Martin

[marlam]

It seems I cannot attach a patch to an issue, so I paste the patch here and hope the formatting survives this:

diff --git a/externals/UsePthreads.cmake b/externals/UsePthreads.cmake
index d5e7fa5..43a8376 100644
--- a/externals/UsePthreads.cmake
+++ b/externals/UsePthreads.cmake
@@ -52,7 +52,7 @@ add_library(pthread SHARED
)

set_target_properties(pthread PROPERTIES COMPILE_DEFINITIONS PTW32_BUILD=1 FOLDER "Externals")
-target_link_libraries(pthread Ws2_32)
+target_link_libraries(pthread ws2_32)

install(TARGETS pthread
ARCHIVE DESTINATION lib COMPONENT codev
diff --git a/libs/client/cudaContext.cpp b/libs/client/cudaContext.cpp
index d84b620..1cf2f3e 100644
--- a/libs/client/cudaContext.cpp
+++ b/libs/client/cudaContext.cpp
@@ -20,7 +20,7 @@
#include "pipe.h"

#ifdef WIN32_API
-# include "wglpipe.h"
+# include "wglPipe.h"
#endif

#ifdef EQ_USE_CUDA
diff --git a/libs/client/wglEventHandler.cpp b/libs/client/wglEventHandler.cpp
index 2f40bfc..c3c385e 100644
--- a/libs/client/wglEventHandler.cpp
+++ b/libs/client/wglEventHandler.cpp
@@ -16,6 +16,7 @@

• 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
  */

+#define _WIN32_WINNT 0x500 // 2000, for WM_XBUTTONDOWN and others
#include <co/base/os.h> // first get windows.h
#include <pthread.h> // then get pthreads
#include <co/base/perThread.h> // then get perThread to have template code
diff --git a/libs/collage/CMakeLists.txt b/libs/collage/CMakeLists.txt
index bf3833c..c5da3a5 100644
--- a/libs/collage/CMakeLists.txt
+++ b/libs/collage/CMakeLists.txt
@@ -27,7 +27,7 @@ add_subdirectory( base )
set(CO_ADD_LINKLIB)

if(WIN32)

• list(APPEND CO_ADD_LINKLIB Ws2_32 mswsock)
• list(APPEND CO_ADD_LINKLIB ws2_32 mswsock)
  endif(WIN32)
  if(MSVC)
  list(APPEND CO_SOURCES pgmConnection.cpp)
  diff --git a/libs/collage/base/buffer.h b/libs/collage/base/buffer.h
  index 14ba783..81db1ed 100644
  --- a/libs/collage/base/buffer.h
  +++ b/libs/collage/base/buffer.h
  @@ -21,6 +21,8 @@
  #include <co/base/debug.h> // EQASSERT macro
  #include <co/base/types.h>

+#include // for malloc
+
namespace co
{
namespace base
diff --git a/libs/collage/base/pluginRegistry.cpp b/libs/collage/base/pluginRegistry.cpp
index 19ffda3..9cf9f33 100644
--- a/libs/collage/base/pluginRegistry.cpp
+++ b/libs/collage/base/pluginRegistry.cpp
@@ -33,6 +33,8 @@
#ifdef _MSC_VER

include <direct.h>

define getcwd _getcwd

+#else
+# include <unistd.h> // for getcwd
#endif

#ifndef MAXPATHLEN
diff --git a/libs/collage/base/rng.h b/libs/collage/base/rng.h
index 11c4d0c..1376329 100644
--- a/libs/collage/base/rng.h
+++ b/libs/collage/base/rng.h
@@ -28,7 +28,7 @@

define NOMINMAX

endif

include <wtypes.h>

-# include <WinCrypt.h>
+# include <wincrypt.h>

pragma comment(lib, "advapi32.lib")

#endif

diff --git a/libs/collage/base/uint128_t.cpp b/libs/collage/base/uint128_t.cpp
index 9f2873e..0da9d44 100644
--- a/libs/collage/base/uint128_t.cpp
+++ b/libs/collage/base/uint128_t.cpp
@@ -18,6 +18,8 @@
#include "uint128_t.h"
#include "debug.h"

+#include // for strtoull
+
namespace co
{
namespace base
diff --git a/libs/collage/connectionDescription.cpp b/libs/collage/connectionDescription.cpp
index f69a86c..b9e182c 100644
--- a/libs/collage/connectionDescription.cpp
+++ b/libs/collage/connectionDescription.cpp
@@ -209,9 +209,9 @@ void ConnectionDescription::setHostname( const std::string& hostname )
_hostname = hostname;
}

-void ConnectionDescription::setInterface( const std::string& interface )
+void ConnectionDescription::setInterface( const std::string& interface_ )
{

• _interface = interface;
• interface = interface;
  }

void ConnectionDescription::setFilename( const std::string& filename )

[eile]

To contribute code changes, please do the following:

Fork the repository
Clone the fork to your machine
edit, commit, push

Then we'll see the pending commits on your side and can merge them easily. Optionally send a push request, if we don't pick it up automatically.

[eile]

Re your issue: can you compile with 'make VERBOSE=1' and add the full link command here?

[marlam]

This is the full link command:

Linking CXX shared library ../../bin/libEqualizerServer.dll
cd /home/lambers/src/equalizer/build-mce/libs/server && /usr/bin/cmake -E cmake_link_script CMakeFiles/lib_EqualizerServer_shared.dir/link.txt --verbose=1
/usr/bin/cmake -E remove -f CMakeFiles/lib_EqualizerServer_shared.dir/objects.a
/var/tmp/mingw-cross-env-2.19/usr/bin/i686-pc-mingw32-ar cr CMakeFiles/lib_EqualizerServer_shared.dir/objects.a @CMakeFiles/lib_EqualizerServer_shared.dir/objects1.rsp
/var/tmp/mingw-cross-env-2.19/usr/bin/i686-pc-mingw32-g++ -L/home/lambers/install/lib -shared -o ../../bin/libEqualizerServer.dll -Wl,--out-implib,libEqualizerServer.dll.a -Wl,--major-image-version,1,--minor-image-version,1 -Wl,--whole-archive CMakeFiles/lib_EqualizerServer_shared.dir/objects.a -Wl,--no-whole-archive ../client/libEqualizer.dll.a ../collage/libCollage.dll.a -lpthread -lws2_32 -lmswsock ../../libglew-1.5.8-MX-Equalizer.a -lglu32 -lopengl32 -lkernel32 -luser32 -lgdi32 -lwinspool -lshell32 -lole32 -loleaut32 -luuid -lcomdlg32 -ladvapi32
Creating library file: libEqualizerServer.dll.a
CMakeFiles/lib_EqualizerServer_shared.dir/objects.a(channel.cpp.obj):channel.cpp:(.text$ZN2eq6fabric7ChannelINS_6server6WindowENS2_7ChannelEEC2ERKS5[eq::fabric::Channel<eq::server::Window, eq::server::Channel>::Channel(eq::fabric::Channel<eq::server::Window, eq::server::Channel> const&)]+0x61): undefined reference to vtable for eq::fabric::Object' CMakeFiles/lib_EqualizerServer_shared.dir/objects.a(channel.cpp.obj):channel.cpp:(.text$_ZN2eq6fabric7ChannelINS_6server6WindowENS2_7ChannelEEC1ERKS5_[eq::fabric::Channel<eq::server::Window, eq::server::Channel>::Channel(eq::fabric::Channel<eq::server::Window, eq::server::Channel> const&)]+0x61): undefined reference tovtable for eq::fabric::Object'
collect2: ld returned 1 exit status

[eile]

The symbol should be in libEqualizer:

eile% nm debug/libs/client/libEqualizer.dylib |c++filt|grep vtable|grep Object
001c8290 S vtable for eq::util::ObjectManager<void const*>::SharedData
001c82a0 S vtable for eq::util::ObjectManager<void const*>
001c7040 S vtable for eq::Config::LatencyObject
001c4f60 S vtable for eq::fabric::Object

You closed the issue - is it solved?

[marlam]

Sorry for closing this, it was by accident.

You are right, the symbol indeed is in libEqualizer:
lambers@jones:~/src/equalizer/build-mce$ i686-pc-mingw32-nm bin/libEqualizer.dll | /var/tmp/mingw-cross-env-2.19/usr/bin/i686-pc-mingw32-c++filt | grep vtable | grep Object
6be5b7f8 R vtable for eq::util::ObjectManager<void const*>::SharedData
6be5b808 R vtable for eq::util::ObjectManager<void const*>
6be5b9e0 R vtable for eq::Config::LatencyObject
6be5cf20 R vtable for eq::fabric::Object

The problem seems to be that the -Wl,--no-whole-archive option does not work correctly with my version of g++: it does not undo the effects of -Wl,--whole-archive. If I link without -Wl,--whole-archive, it works fine.

So this is not a problem of Equalizer. I'll see if I find a workaround...