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Rewrite cmake/FindRakNet.cmake

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This commit fixes (at least) the following problems:

1. cmake will "find" RakNet include directory even if the cmake option
   `-DRakNet_INCLUDES` CACHE entry value is incorrect. The build will
   fail later when an included RakNet file is missing. (To test,
   change to `-DRakNet_INCLUDES="/tmp/CrabNet/includex"` below.)

2. cmake will not find the RakNet Release library (which exists at the
   path specified with `-DRakNet_LIBRARY_RELEASE`) unless
   `-DRakNet_LIBRARY_DEBUG` is defined (to any value). (To test,
   remove the `-DRakNet_LIBRARY_DEBUG` line below.)

3. cmake will not find anything if only the environment variable
   `RAKNET_ROOT` is set, although it appears that it was intended to
   be used as a search path. (To test, add `RAKNET_ROOT=/tmp/CrabNet`
   and remove the three `-DRakNet_` lines.)

This commit was tested with the following cmake command in a Debian
bookworm container with CrabNet and osg directories in `/tmp`:

```sh
mkdir build/
cd build/
cmake .. -DBUILD_BROWSER=OFF \
         -DBUILD_BSATOOL=OFF \
         -DBUILD_ESMTOOL=OFF \
         -DBUILD_ESSIMPORTER=OFF \
         -DBUILD_LAUNCHER=OFF \
         -DBUILD_MWINIIMPORTER=OFF \
         -DBUILD_NIFTEST=OFF \
         -DBUILD_OPENCS=OFF \
         -DBUILD_OPENMW=ON \
         -DBUILD_OPENMW_MP=OFF \
         -DBUILD_WIZARD=OFF \
         -DCMAKE_BUILD_TYPE=Release \
         -DOPENSCENEGRAPH_INCLUDE_DIRS=/tmp/osg/include \
         -DRakNet_INCLUDES="/tmp/CrabNet/include" \
         -DRakNet_LIBRARY_DEBUG="/tmp/CrabNet/lib/libRakNetLibStaticd.a" \
         -DRakNet_LIBRARY_RELEASE="/tmp/CrabNet/lib/libRakNetLibStatic.a"
make -j $(nproc)
```
pull/676/head
backlabs1 3 months ago
parent 3f74065c5c
commit 94c914bfb1
No known key found for this signature in database
GPG Key ID: B15988E0EC4C851A
2 changed files with 108 additions and 74 deletions
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2
CMakeLists.txt
Unescape Escape View File

@ -196,7 +196,7 @@ if (WIN32)
endif()
find_package(RakNet REQUIRED)
include_directories(${RakNet_INCLUDES})
include_directories(${RakNet_INCLUDE_DIRS})
# Dependencies
find_package(OpenGL REQUIRED)

180
cmake/FindRakNet.cmake
Unescape Escape View File

@ -1,77 +1,111 @@
# Comes form project edunetgames
# - Try to find RakNet
# Once done this will define
# Copyright © 2024 backlabs1 <backlabs1@mailbox.org>
#
# RakNet_FOUND - system has RakNet
# RakNet_INCLUDES - the RakNet include directory
# RakNet_LIBRARY - Link these to use RakNet
FIND_LIBRARY (RakNet_LIBRARY_RELEASE NAMES RakNetLibStatic
PATHS
ENV LD_LIBRARY_PATH
ENV LIBRARY_PATH
/usr/lib64
/usr/lib
/usr/local/lib64
/usr/local/lib
/opt/local/lib
$ENV{RAKNET_ROOT}/lib
# Distributed under the GNU General Public License version 3 as published by
# the Free Software Foundation.
#[=======================================================================[.rst:
FindRakNet
-------
Finds the RakNet library.
Imported Targets
^^^^^^^^^^^^^^^^
This module provides the following imported targets, if found:
``RakNet::RakNet``
The RakNet library
Result Variables
^^^^^^^^^^^^^^^^
This will define the following variables:
``RakNet_FOUND``
True if the system has the RakNet library.
``RakNet_INCLUDE_DIRS``
Include directories needed to use RakNet.
``RakNet_LIBRARIES``
Libraries needed to link to RakNet.
Cache Variables
^^^^^^^^^^^^^^^
The following cache variables may also be set:
``RakNet_INCLUDE_DIR``
The directory containing ``RakPeer.h``.
``RakNet_LIBRARY_DEBUG``
The path to the RakNet library (Debug configuration).
``RakNet_LIBRARY_RELEASE``
The path to the RakNet library (Release configuration).
#]=======================================================================]
find_path(RakNet_INCLUDE_DIR
NAMES RakPeer.h
PATHS /usr /usr/local /opt/local ${RakNet_INCLUDES}
ENV CPATH ENV RAKNET_ROOT
PATH_SUFFIXES include include/raknet RakNet raknet
)
find_library(RakNet_LIBRARY_RELEASE
NAMES RakNetLibStatic
PATHS /usr /usr/local /opt/local
ENV LD_LIBRARY_PATH ENV LIBRARY_PATH ENV RAKNET_ROOT
PATH_SUFFIXES lib lib64
)
find_library(RakNet_LIBRARY_DEBUG
NAMES RakNetLibStaticd
PATHS /usr /usr/local /opt/local
ENV LD_LIBRARY_PATH ENV LIBRARY_PATH ENV RAKNET_ROOT
PATH_SUFFIXES lib lib64
)
include(SelectLibraryConfigurations)
select_library_configurations(RakNet)
include(FindPackageHandleStandardArgs)
find_package_handle_standard_args(RakNet
FOUND_VAR RakNet_FOUND
REQUIRED_VARS
RakNet_LIBRARY
RakNet_INCLUDE_DIR
)
if(RakNet_FOUND)
if(WIN32)
set(RakNet_LIBRARY "${RakNet_LIBRARY}" ws2_32.lib)
endif()
set(RakNet_LIBRARIES ${RakNet_LIBRARY})
set(RakNet_INCLUDE_DIRS ${RakNet_INCLUDE_DIR})
if (NOT TARGET RakNet::RakNet)
add_library(RakNet::RakNet UNKNOWN IMPORTED)
endif()
if (RakNet_LIBRARY_RELEASE)
set_property(TARGET RakNet::RakNet APPEND PROPERTY
IMPORTED_CONFIGURATIONS RELEASE
)
set_target_properties(RakNet::RakNet PROPERTIES
IMPORTED_LOCATION_RELEASE "${RakNet_LIBRARY_RELEASE}"
)
endif()
if (RakNet_LIBRARY_DEBUG)
set_property(TARGET RakNet::RakNet APPEND PROPERTY
IMPORTED_CONFIGURATIONS DEBUG
)
FIND_LIBRARY (RakNet_LIBRARY_DEBUG NAMES RakNetLibStaticd
PATHS
ENV LD_LIBRARY_PATH
ENV LIBRARY_PATH
/usr/lib64
/usr/lib
/usr/local/lib64
/usr/local/lib
/opt/local/lib
$ENV{RAKNET_ROOT}/lib
)
FIND_PATH (RakNet_INCLUDES raknet/RakPeer.h
ENV CPATH
/usr/include
/usr/local/include
/opt/local/include
$ENV{RAKNET_ROOT}/include
set_target_properties(RakNet::RakNet PROPERTIES
IMPORTED_LOCATION_DEBUG "${RakNet_LIBRARY_DEBUG}"
)
MESSAGE(STATUS ${RakNet_INCLUDES})
MESSAGE(STATUS ${RakNet_LIBRARY_RELEASE})
IF(RakNet_INCLUDES AND RakNet_LIBRARY_RELEASE)
SET(RakNet_FOUND TRUE)
ENDIF(RakNet_INCLUDES AND RakNet_LIBRARY_RELEASE)
IF(RakNet_FOUND)
SET(RakNet_INCLUDES ${RakNet_INCLUDES}/raknet)
IF (CMAKE_CONFIGURATION_TYPES OR CMAKE_BUILD_TYPE)
SET(RakNet_LIBRARY optimized ${RakNet_LIBRARY_RELEASE} debug ${RakNet_LIBRARY_DEBUG})
IF(WIN32)
SET(RakNet_LIBRARY optimized ${RakNet_LIBRARY_RELEASE} debug ${RakNet_LIBRARY_DEBUG} ws2_32.lib)
ENDIF(WIN32)
ELSE()
# if there are no configuration types and CMAKE_BUILD_TYPE has no value
# then just use the release libraries
SET(RakNet_LIBRARY ${RakNet_LIBRARY_RELEASE} )
IF(WIN32)
SET(RakNet_LIBRARY ${RakNet_LIBRARY_RELEASE} ws2_32.lib)
ENDIF(WIN32)
ENDIF()
IF(NOT RakNet_FIND_QUIETLY)
MESSAGE(STATUS "Found RakNet_LIBRARY_RELEASE: ${RakNet_LIBRARY_RELEASE}")
MESSAGE(STATUS "Found RakNet_INCLUDES: ${RakNet_INCLUDES}")
ENDIF(NOT RakNet_FIND_QUIETLY)
ELSE(RakNet_FOUND)
IF(RakNet_FIND_REQUIRED)
MESSAGE(FATAL_ERROR "Could not find RakNet")
ENDIF(RakNet_FIND_REQUIRED)
ENDIF(RakNet_FOUND)
endif()
set_target_properties(RakNet::RakNet PROPERTIES
INTERFACE_INCLUDE_DIRECTORIES "${RakNet_INCLUDE_DIR}"
)
message(STATUS "Found RakNet_INCLUDE_DIRS: ${RakNet_INCLUDE_DIRS}")
endif()
mark_as_advanced(
RakNet_INCLUDE_DIR
RakNet_LIBRARY_DEBUG
RakNet_LIBRARY_RELEASE
)

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