shared-library.cmake

# Copyright (C) 2008-2014 LAAS-CNRS, JRL AIST-CNRS.
#
# This program is free software: you can redistribute it and/or modify it under
# the terms of the GNU General Public License as published by the Free Software
# Foundation, either version 3 of the License, or (at your option) any later
# version.
#
# This program is distributed in the hope that it will be useful, but WITHOUT
# ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
# FOR A PARTICULAR PURPOSE.  See the GNU General Public License for more
# details.
#
# You should have received a copy of the GNU General Public License along with
# this program.  If not, see <http://www.gnu.org/licenses/>.

# Shared library related constants (used for pkg-config file generation). FIXME:
# can't we get these information from CMake directly?
set(LIBDIR_KW "-L")
set(LIBINCL_KW "-l")
set(LIBINCL_ABSKW "")
set(LIB_EXT "")
if(WIN32)
  set(LIB_EXT ".lib")
elseif(UNIX)
  # Using -l:/some/absolute/path.so was an "undocumented ld feature, in actual
  # fact a ld bug, that has since been fixed". This was apparently used (e.g. in
  # ROS) because of pkg-config problems that have since been fixed. See:
  # https://github.com/ros/catkin/issues/694#issuecomment-88323282 Note: ld
  # version on Linux can be 2.25.1 or 2.24
  if(NOT CMAKE_LINKER)
    include(CMakeFindBinUtils)
  endif()

  execute_process(
    COMMAND ${CMAKE_LINKER} -v
    OUTPUT_VARIABLE LD_VERSION_STR
    ERROR_VARIABLE LD_VERSION_STR
  )
  string(
    REGEX MATCH
    "([0-9]+\\.[0-9]+(\\.[0-9]+)?)"
    LD_VERSION
    ${LD_VERSION_STR}
  )
  if(${LD_VERSION} VERSION_LESS "2.24.90")
    set(LIBINCL_ABSKW "-l:")
  else()
    set(LIBINCL_ABSKW "")
  endif()
endif(WIN32)