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archenroot
Tux's lil' helper
Tux's lil' helper


Joined: 13 Dec 2011
Posts: 148

PostPosted: Sun Jan 08, 2017 11:31 am    Post subject: Torch Lua na C libraries install location issue Reply with quote

Hi,

I work on Torch ebuilds in my overlay. And got into situation which is quite easy to fix, but to me question which solution is correct.

When I install Torch package I do it as:
Code:
DESCRIPTION="Torch is a Lua-based suite for scientific computations based on multidimensional tensors."
HOMEPAGE="https://github.com/torch/torch7"
EGIT_REPO_URI="https://github.com/torch/torch7.git"

....
src_configure() {
   local mycmakeargs=(
      "-DLUADIR=$($(tc-getPKG_CONFIG) --variable INSTALL_LMOD $(usex luajit 'luajit' 'lua'))"
      "-DLIBDIR=$($(tc-getPKG_CONFIG) --variable INSTALL_LIB $(usex luajit 'luajit' 'lua'))"
      "-DLUA_BINDIR=$($(tc-getPKG_CONFIG) --variable INSTALL_BIN $(usex luajit 'luajit' 'lua'))"
      "-DLUA_INCDIR=$($(tc-getPKG_CONFIG) --variable INSTALL_INC $(usex luajit 'luajit' 'lua'))"
      "-DLUA_LIBDIR=$($(tc-getPKG_CONFIG) --variable INSTALL_CMOD $(usex luajit 'luajit' 'lua'))"
      "-DSCRIPTS_DIR=$($(tc-getPKG_CONFIG) --variable INSTALL_BIN $(usex luajit 'luajit' 'lua'))"
      "-DLUALIB=`equery files luajit |grep lib64/libluajit | grep .so | awk 'NR==0; END{print}'`"
      "-DLUA=/usr/bin/luajit"
   )

   cmake-utils_src_configure
}


Important is my configuration of LUA libraries. With these settings Torch is installed as following:
Code:
 * QA Notice: The following shared libraries lack a SONAME
 * /usr/lib64/libtorch.so

strip: x86_64-pc-linux-gnu-strip --strip-unneeded -R .comment -R .GCC.command.line -R .note.gnu.gold-version
   usr/lib64/lua/5.1/libluaT.so.0
   usr/lib64/libtorch.so
   usr/lib64/lua/5.1/libTH.so.0


So some goes directly to /usr/lib64 and some goes to lua subdir, which looks correct to me.

Next I am emerging ebuild for Facebook TH++ library based on Troch using CMAKE as well, but this time the library build fails on:
Code:
CMake Error at /usr/share/cmake/torch/TorchExports.cmake:70 (message):
  The imported target "TH" references the file

     "/usr/lib64/libTH.so.0"

  but this file does not exist.  Possible reasons include:

  * The file was deleted, renamed, or moved to another location.

  * An install or uninstall procedure did not complete successfully.

  * The installation package was faulty and contained

     "/usr/share/cmake/torch/TorchExports.cmake"

  but not all the files it references.

Call Stack (most recent call first):
  /usr/share/cmake/torch/TorchConfig.cmake:29 (INCLUDE)
  CMakeLists.txt:26 (FIND_PACKAGE)


So how to best result the situation by not making things dirty? (I know I can do simple symlink now and end of story..)

Thank you for suggestions.

Ladislav
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