# SPDX-License-Identifier: EPL-2.0 OR GPL-2.0-or-later
# SPDX-FileCopyrightText: Bradley M. Bell <bradbell@seanet.com>
# SPDX-FileContributor: 2003-24 Bradley M. Bell
# ----------------------------------------------------------------------------
# Construct cppad.pc from cppad.pc.in; see
# http://people.freedesktop.org/~dbn/pkg-config-guide.html
# -----------------------------------------------------------------------------
# {xrst_begin pkgconfig}
# {xrst_spell
#     builddir
#     cflags
#     datadir
#     includedir
#     libdir
#     libs
# }
# {xrst_comment_ch #}
#
# CppAD pkg-config Files
# ######################
#
# Purpose
# *******
# The ``pkg-config`` program helps with the used if installed libraries
# and include files; see its
# `guide <https://people.freedesktop.org/~dbn/pkg-config-guide.html>`_
# for more information on writing an using pkg-config files.
#
# cppad.pc
# ********
#
# PKG_CONFIG_PATH
# ===============
# The ``cppad.pc`` file is installed in the following two directories:
#
# | |tab| *prefix* / *libdir* / ``pkgconfig``
# | |tab| *prefix* / *datadir* / ``pkgconfig``
#
# where *prefix* is :ref:`cmake@cppad_prefix` ,
# *libdir* is the first entry in
# :ref:`cmake@cmake_install_libdirs` ,
# and # *datadir* is
# :ref:`cmake@cmake_install_datadir` .
# In order to use ``pkg-config`` ,
# one of these directories must your ``PKG_CONFIG_PATH`` .
#
# Compile Flags
# =============
# The necessary flags for compiling code that includes CppAD can
# be obtained with the command
# ::
#
#     pkg-config --cflags cppad
#
# Link Flags
# ==========
# The flags for linking can be obtains with the command
# ::
#
#     pkg-config --libs cppad
#
# Extra Definitions
# =================
# The ``cppad.pc`` file contains the text:
#
# | |tab| ``prefix`` = *prefix*
# | |tab| ``exec_prefix`` = *exec_prefix*
# | |tab| ``includedir`` = *includedir*
# | |tab| ``libdir`` = *libdir*
#
# where *prefix* , *exec_prefix* , *includedir* , and
# *libdir* are the
# `gnu installation variables <https://www.gnu.org/prep/standards/html_node/Directory-Variables.html>`_.
#
# cppad-uninstalled.pc
# ********************
#
# PKG_CONFIG_PATH
# ===============
# The ``cppad-uninstalled.pc`` file is located in the following directory:
#
#     *builddir* / ``pkgconfig``
#
# where *builddir* is the directory where the :ref:`cmake-name` command
# is executed.
#
# Compile Flags
# =============
# The necessary flags for compiling code that includes CppAD,
# before CppAD is installed, can be obtained with the command
# ::
#
#     pkg-config --cflags cppad-uninstalled
#
# Link Flags
# ==========
# The flags for linking can be obtains with the command
# ::
#
#     pkg-config --libs cppad-uninstalled
#
# Extra Definitions
# =================
# The ``cppad-uninstalled.pc`` file has the same extra variables
# as the ``cppad.pc`` file.
#
# {xrst_end pkgconfig}
# ----------------------------------------------------------------------------
#
# The following variables are used by cppad.pc.in
# and set in the top source CMakeLists.txt:
#  cppad_prefix,
#  cppad_description,
#  cppad_version,
#  cppad_url,
#  cppad_lib
# The other variables used by cppad.pc.in are set below
# Note that cppad_SOURCE_DIR is used by cppad-uninstalled.pc
# and is set by cmake to the top source directory.
#
# cppad_includedir
LIST(GET cmake_install_includedirs 0 cppad_includedir)
#
# cppad_libdir
LIST(GET cmake_install_libdirs 0 cppad_libdir)
#
# add_to_set
MACRO(add_to_set variable_name element)
   IF( "${${variable_name}}" STREQUAL "" )
      SET(${variable_name} ${element} )
   ELSE( "${${variable_name}}" STREQUAL "" )
      LIST(FIND ${variable_name} ${element} index)
      IF( index EQUAL -1 )
         SET(${variable_name} "${${variable_name}} ${element}")
      ENDIF( index EQUAL -1 )
   ENDIF( "${${variable_name}}" STREQUAL "" )
ENDMACRO(add_to_set variable_name element)
# -----------------------------------------------------------------------------
# initialize
SET(cppad_libdir_list "-L${cppad_prefix}/${cppad_libdir}")
SET(cppad_lib_list    "-l${cppad_lib}")
SET(cppad_requires         "")
SET(cppad_libs_private     "")
SET(cppad_requires_private "")
#
# Colpack does not have a pkgconfig file.
SET(colpack_libdir     NOTFOUND)
IF( cppad_has_colpack )
   FOREACH(dir ${cmake_install_libdirs})
      FILE(GLOB file_list "${colpack_prefix}/${dir}/libColPack.*" )
      IF( file_list )
         SET(colpack_libdir "${colpack_prefix}/${dir}")
      ENDIF( file_list )
   ENDFOREACH(dir ${cmake_install_libdirs})
   IF( NOT colpack_libdir )
      MESSAGE(FATAL_ERROR "Cannit find libColPack.* below ${colpack_prefix}")
   ENDIF( NOT colpack_libdir )
   add_to_set(cppad_libdir_list "-L${colpack_libdir}")
   add_to_set(cppad_lib_list    "-lColPack")
ENDIF( cppad_has_colpack )
#
# Ipopt and eigen have pkgconfig files.
IF( cppad_has_eigen )
   SET(cppad_requires         "${cppad_requires} eigen3")
ENDIF( cppad_has_eigen )
IF( cppad_has_ipopt )
   SET(cppad_requires         "${cppad_requires} ipopt")
   add_to_set(cppad_lib_list  "-lcppad_ipopt" )
ENDIF( cppad_has_ipopt )
# -----------------------------------------------------------------------------
# cppad.pc
CONFIGURE_FILE(
   ${CMAKE_CURRENT_SOURCE_DIR}/cppad.pc.in
   ${CMAKE_CURRENT_BINARY_DIR}/cppad.pc
   @ONLY
)
# cppad-uninstalled.pc
CONFIGURE_FILE(
   ${CMAKE_CURRENT_SOURCE_DIR}/cppad-uninstalled.pc.in
   ${CMAKE_CURRENT_BINARY_DIR}/cppad-uninstalled.pc
   @ONLY
)
# During install copy cppad.pc to datadir
INSTALL(FILES ${CMAKE_CURRENT_BINARY_DIR}/cppad.pc
   DESTINATION ${cppad_abs_datadir}/pkgconfig
)
# During install also copy cppad.pc to libdir
INSTALL(FILES ${CMAKE_CURRENT_BINARY_DIR}/cppad.pc
   DESTINATION ${cppad_abs_libdir}/pkgconfig
)
