2 # This file is part of the GROMACS molecular simulation package.
4 # Copyright (c) 2014,2015, by the GROMACS development team, led by
5 # Mark Abraham, David van der Spoel, Berk Hess, and Erik Lindahl,
6 # and including many others, as listed in the AUTHORS file in the
7 # top-level source directory and at http://www.gromacs.org.
9 # GROMACS is free software; you can redistribute it and/or
10 # modify it under the terms of the GNU Lesser General Public License
11 # as published by the Free Software Foundation; either version 2.1
12 # of the License, or (at your option) any later version.
14 # GROMACS is distributed in the hope that it will be useful,
15 # but WITHOUT ANY WARRANTY; without even the implied warranty of
16 # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
17 # Lesser General Public License for more details.
19 # You should have received a copy of the GNU Lesser General Public
20 # License along with GROMACS; if not, see
21 # http://www.gnu.org/licenses, or write to the Free Software Foundation,
22 # Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
24 # If you want to redistribute modifications to GROMACS, please
25 # consider that scientific software is very special. Version
26 # control is crucial - bugs must be traceable. We will be happy to
27 # consider code for inclusion in the official distribution, but
28 # derived work must not be called official GROMACS. Details are found
29 # in the README & COPYING files - if they are missing, get the
30 # official version at http://www.gromacs.org.
32 # To help us fund GROMACS development, we humbly ask that you cite
33 # the research papers on the package. Check out http://www.gromacs.org.
35 # - Define macro to check if linking to zlib actually works,
36 # because the find_package macro is content if one exists. This can
37 # fail in cross-compilation environments, and we want to know about
38 # zlib so the zlib TNG support is built only when it will work.
40 # GMX_TEST_ZLIB(VARIABLE)
42 # VARIABLE will be set to true if zlib support is present
44 include(CheckLibraryExists)
45 include(gmxOptionUtilities)
46 function(GMX_TEST_ZLIB VARIABLE)
48 set(${VARIABLE} OFF PARENT_SCOPE)
52 string(TOUPPER "${CMAKE_BUILD_TYPE}" _cmake_build_type)
53 if(${_cmake_build_type} STREQUAL "MSAN")
54 # Linking MSan-enabled zlib in a way that can be tested with
55 # try_compile setup is tricky, but someone doing an MSan build
56 # can take care of themselves.
57 set(${VARIABLE} ON PARENT_SCOPE)
61 gmx_check_if_changed(_do_zlib_recompile ZLIB_INCLUDE_DIR ZLIB_LIBRARIES)
62 if(_do_zlib_recompile)
63 unset(ZLIB_LINKS_OK CACHE)
65 check_library_exists("${ZLIB_LIBRARIES}" "zlibVersion" "" ZLIB_LINKS_OK)
66 set(${VARIABLE} ${ZLIB_LINKS_OK} PARENT_SCOPE)