On 06/11/2010 12:27 PM, Torri, Stephen CIV NSWCDD, W15 wrote:
From: Ryan Pavlik [mailto:rpav...@iastate.edu]
Sent: Fri 6/11/2010 1:16 PM
To: Torri, Stephen CIV NSWCDD, W15
Cc: cmake@cmake.org
Subject: Re: [CMake] How to install a shared library on a windows system
From: cmake-boun...@cmake.org on behalf of Ryan Pavlik
Sent: Fri 6/11/2010 12:34 PM
To: cmake@cmake.org
Subject: Re: [CMake] How to install a shared library on a windows system
Stephen,
The catch is that windows searches for the DLL at runtime in specific
locations: http://msdn.microsoft.com/en-us/library/7d83bc18%28VS.80%29.aspx
I see that it searches the directories listed in the PATH variable. How can you
tell CPACK to just always install itself to the PATH variable instead of asking?
You generally don't want to put your install directory in the PATH
environment variable system-wide (or install to c:\windows\system32):
you'll probably either want to a: install a launcher script that appends
to the path at run time (see my other recent mailing list post), or b:
use something like my example so your dll ends up in the same directory
as your exe.
The end goal of this project is to install a shared library than someone other
than me can link against and use. I am used to programming on Linux where I can
just install to /usr/lib, /lib, /opt/lib or some other directory like that
where the OS knows to search. Now I read your last post again and concluded
that I cannot put my library in the directory as the EXE since I don't know
that directory another user will create. I hope understand I am coming from
Linux and trying to convince Windows to play nice.
So I am trying to be the nice library developer and set things up the right
way. Now that you know what I am doing and the audience I am serving how do you
recommend I install my library so that a third-party can link against it and
find it a runtime?
Would a phone call help?
Stephen
Welcome to the joy of programming on Windows - this is one of my most
persistent headaches.
The burden is now on your developer: that said, if you install a
-config.cmake file that, in addition to setting _INCLUDE_DIRS and
_LIBRARIES, sets _RUNTIME_LIBRARIES and _RUNTIME_LIBRARY_DIRS, the
consumer of the library can either a) generate a script that adds the
runtime library dirs to the path, or b) copy the _RUNTIME_LIBRARIES into
their binary directory. They can also then install(FILES
${whatever_RUNTIME_LIBRARIES} DESTINATION bin) so that their installers
get a copy of the DLL.
I threw together a quick sample of what you might want to have in your
library's project, based on a recent library I made - it's attached.
Hopefully this helps.
Ryan
--
Ryan Pavlik
HCI Graduate Student
Virtual Reality Applications Center
Iowa State University
rpav...@iastate.edu
http://academic.cleardefinition.com
# Example of setting up CMake config files when developing a library
# 2009-2010 Ryan Pavlik <rpav...@iastate.edu>
# http://academic.cleardefinition.com/
# Iowa State University HCI Graduate Program/VRAC
cmake_minimum_required(VERSION 2.6.2)
# Set package properties
project(MyPackage)
set(BIN_DIR bin)
set(INCLUDE_DIR include)
set(ARCH_DIR lib)
if(WIN32)
set(LIB_DIR bin)
else()
set(LIB_DIR lib)
endif()
# Create a library
set(SOURCES
MyLib1.cpp)
set(API
MyLib1.h)
add_library(MyLib1 ${SOURCES} ${API})
set_target_properties(MyLib1 PROPERTIES PUBLIC_HEADER "${API}")
# target_link_libraries(MyLib1 ${WHATEVER_LIBRARIES}) # if needed
install(TARGETS MyLib1
EXPORT mypackage-sdk
RUNTIME DESTINATION ${BIN_DIR} COMPONENT runtime # In case this
becomes a shared library
LIBRARY DESTINATION ${LIB_DIR} COMPONENT runtime # In case this
becomes a shared library
ARCHIVE DESTINATION ${ARCH_DIR} COMPONENT sdk
PUBLIC_HEADER DESTINATION include/MyPackage)
###
# Pretend this directory creates and installs another library, like above
add_subdirectory(mylib2)
###
# Set up use from build tree
set(BUILD_TREE_TARGETS MyLib1 MyLib2)
configure_file(mypackage-config-build-tree.cmake.in MyPackageConfig.cmake @ONLY)
export(TARGETS ${BUILD_TREE_TARGETS}
NAMESPACE mypackage_buildtree_
FILE mypackage-targets.cmake)
export(PACKAGE MyPackage)
###
# Set up use from install tree
if(WIN32)
set(EXPORT_DIR cmake)
else()
set(EXPORT_DIR ${LIB_DIR}/MyPackage)
endif()
install(EXPORT mypackage-sdk
DESTINATION ${EXPORT_DIR}
NAMESPACE mypackage_exported_
FILE mypackage-targets.cmake)
configure_file(mypackage-config.cmake.in mypackage-config-for-install.cmake
@ONLY)
install(FILES ${CMAKE_CURRENT_BINARY_DIR}/mypackage-config-for-install.cmake
RENAME mypackage-config.cmake
DESTINATION ${EXPORT_DIR})
###
# Include the packaging system now that we have it all set up
include(CPack)
# 2009-2010 Ryan Pavlik <rpav...@iastate.edu>
# http://academic.cleardefinition.com/
# Iowa State University HCI Graduate Program/VRAC
#
# Will set:
# MYPACKAGE_LIBRARIES
# MYPACKAGE_MYLIB1_LIBRARIES
# MYPACKAGE_MYLIB2_LIBRARIES
# MYPACKAGE_INCLUDE_DIRS
# MYPACKAGE_RUNTIME_LIBRARIES and MYPACKAGE_RUNTIME_LIBRARY_DIRS if applicable
# MYPACKAGE_FOUND
include(mypackage-targets.cmake)
set(MYPACKAGE_LIBRARIES)
set(MYPACKAGE_RUNTIME_LIBRARIES)
set(MYPACKAGE_RUNTIME_LIBRARY_DIRS)
foreach(_lib MyLib1 MyLib2)
set(_explib mypackage_exported_${_lib}) # The exported target name
string(TOUPPER MYPACKAGE_${_lib}_LIBRARIES _libvar) # Upper case
variable name
set(${_libvar} ${_explib})
list(APPEND MYPACKAGE_LIBRARIES ${_explib})
# Runtime library info - only useful for shared libraries
get_property(_type TARGET ${_explib} PROPERTY TYPE)
if(_type STREQUAL "SHARED_LIBRARY")
get_property(_configs TARGET ${_explib} PROPERTY
IMPORTED_CONFIGURATIONS)
foreach(_config ${_configs})
get_property(_libloc TARGET ${_explib} PROPERTY
IMPORTED_LOCATION_${_config})
if(EXISTS "${_libloc}")
list(APPEND MYPACKAGE_RUNTIME_LIBRARIES
"${_libloc}")
get_filename_component(_libpath "${_libloc}"
PATH)
list(APPEND MYPACKAGE_RUNTIME_LIBRARY_DIRS
${_libpath})
endif()
endforeach()
endif()
endforeach()
if(MYPACKAGE_RUNTIME_LIBRARIES)
list(REMOVE_DUPLICATES MYPACKAGE_RUNTIME_LIBRARIES)
endif()
if(MYPACKAGE_RUNTIME_LIBRARY_DIRS)
list(REMOVE_DUPLICATES MYPACKAGE_RUNTIME_LIBRARY_DIRS)
endif()
# Compute the installation prefix relative to this file.
get_filename_component(_IMPORT_PREFIX "${CMAKE_CURRENT_LIST_FILE}" PATH)
get_filename_component(_IMPORT_PREFIX "${_IMPORT_PREFIX}" PATH)
if(NOT WIN32)
get_filename_component(_IMPORT_PREFIX "${_IMPORT_PREFIX}" PATH)
endif()
set(MYPACKAGE_INCLUDE_DIRS "${_IMPORT_PREFIX}/include")
set(_IMPORT_PREFIX)
set(MYPACKAGE_FOUND ON)
# 2009-2010 Ryan Pavlik <rpav...@iastate.edu>
# http://academic.cleardefinition.com/
# Iowa State University HCI Graduate Program/VRAC
#
# Will set:
# MYPACKAGE_LIBRARIES
# MYPACKAGE_MYLIB1_LIBRARIES
# MYPACKAGE_MYLIB2_LIBRARIES
# MYPACKAGE_INCLUDE_DIRS
# MYPACKAGE_RUNTIME_LIBRARIES and MYPACKAGE_RUNTIME_LIBRARY_DIRS if applicable
# MYPACKAGE_FOUND
set(MYPACKAGE_INCLUDE_DIRS
"@CMAKE_CURRENT_SOURCE_DIR@")
include("@CMAKE_CURRENT_BINARY_DIR@/mypackage-targets.cmake")
set(MYPACKAGE_LIBRARIES)
set(MYPACKAGE_RUNTIME_LIBRARIES)
set(MYPACKAGE_RUNTIME_LIBRARY_DIRS)
foreach(_lib MyLib1 MyLib2)
set(_explib mypackage_buildtree_${_lib}) # The exported target name
string(TOUPPER MYPACKAGE_${_lib}_LIBRARIES _libvar) # Upper case
variable name
set(${_libvar} ${_explib})
list(APPEND MYPACKAGE_LIBRARIES ${_explib})
# Runtime library info - only useful for shared libraries
get_property(_type TARGET ${_explib} PROPERTY TYPE)
if(_type STREQUAL "SHARED_LIBRARY")
get_property(_configs TARGET ${_explib} PROPERTY
IMPORTED_CONFIGURATIONS)
foreach(_config ${_configs})
get_property(_libloc TARGET ${_explib} PROPERTY
IMPORTED_LOCATION_${_config})
if(EXISTS "${_libloc}")
list(APPEND MYPACKAGE_RUNTIME_LIBRARIES
"${_libloc}")
get_filename_component(_libpath "${_libloc}"
PATH)
list(APPEND MYPACKAGE_RUNTIME_LIBRARY_DIRS
${_libpath})
endif()
endforeach()
endif()
endforeach()
if(MYPACKAGE_RUNTIME_LIBRARIES)
list(REMOVE_DUPLICATES MYPACKAGE_RUNTIME_LIBRARIES)
endif()
if(MYPACKAGE_RUNTIME_LIBRARY_DIRS)
list(REMOVE_DUPLICATES MYPACKAGE_RUNTIME_LIBRARY_DIRS)
endif()
set(MYPACKAGE_FOUND ON)
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