Bug#633459: ftbs with ld --as-needed

[Julian Taylor]

Package: gmsh
Version: 2.5.1~beta1~svn9559~dfsg-1
Severity: wishlist
Tags: patch
User: ubuntu-devel at lists.ubuntu.com
Usertags: origin-ubuntu oneiric ubuntu-patch

the package gmsh fails to build with ld --as-needed
when building with ld --as-needed the libraries must be placed after
the objects needing their symbols.
The package sets libraries in CMAKE_CXX_FLAGS, so they get placed in the
wrong position and one gets undefined references.

See the log in the ubuntu bug:
https://bugs.launchpad.net/ubuntu/+source/gmsh/+bug/803181

Attached patch fixes this issue adding them to
target_link_libraries(gmsh,..) and removes them from debian/rules.

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