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Install relocatable dylibs (MacOS)

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Problem: When building libzmq with CMake, the installed libzmq.dylib
  has a relative install name (otool -D libzmq.dylib) on MacOS. This
  is a regression against building via autotools which sets an
  absolute install name. Effectively, the CMake built libzmq.dylib
  is rendered useless if installed in non-system directories and
  used in environments without explicit DYLD_LIBRARY_PATH mgmt. For
  example running any of the installed executables currently fails:
  $ /some_install_prefix/bin/inproc_lat
  dyld: Library not loaded: libzmq.5.dylib
    Referenced from: /some_install_prefix/bin/inproc_lat
    Reason: image not found
  Trace/BPT trap: 5

Solution: Best practice is to install relocatable dylibs.
  On MacOS this means setting an install name with a special prefix,
  e.g. @rpath/libzmq.dylib, and adding the relevant search paths
  to the embedded rpath list. In this patch the necessary CMake options
  are added to generate the desired relocatable dylibs. Find more
  information on: https://cmake.org/Wiki/CMake_RPATH_handling.
This commit is contained in:
Dennis Klein 2018-04-25 19:06:21 +02:00
parent 7f230b12fe
commit 0dda63660e
No known key found for this signature in database
GPG Key ID: 08E62D23FA0ECBBC
1 changed files with 17 additions and 2 deletions
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19
CMakeLists.txt
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@ -7,6 +7,23 @@ list (INSERT CMAKE_MODULE_PATH 0 "${CMAKE_CURRENT_SOURCE_DIR}")
set (ZMQ_CMAKE_MODULES_DIR ${CMAKE_CURRENT_SOURCE_DIR}/builds/cmake/Modules)
list (APPEND CMAKE_MODULE_PATH ${ZMQ_CMAKE_MODULES_DIR})
# Apply CMP0042: MACOSX_RPATH is enabled by default
cmake_policy (SET CMP0042 NEW)
include(GNUInstallDirs)
if (${CMAKE_SYSTEM_NAME} STREQUAL Darwin)
# Find more information: https://cmake.org/Wiki/CMake_RPATH_handling
# Add an install rpath if it is not a system directory
list (FIND CMAKE_PLATFORM_IMPLICIT_LINK_DIRECTORIES "${CMAKE_INSTALL_PREFIX}/${CMAKE_INSTALL_LIBDIR}" isSystemDir)
if ("${isSystemDir}" STREQUAL "-1")
set (CMAKE_INSTALL_RPATH "${CMAKE_INSTALL_PREFIX}/${CMAKE_INSTALL_LIBDIR}")
endif ()
# Add linker search paths pointing to external dependencies
set (CMAKE_INSTALL_RPATH_USE_LINK_PATH TRUE)
endif ()
include(CheckCXXCompilerFlag)
CHECK_CXX_COMPILER_FLAG("-std=gnu++11" COMPILER_SUPPORTS_CXX11)
if(COMPILER_SUPPORTS_CXX11)
@ -1110,8 +1127,6 @@ endif ()
#-----------------------------------------------------------------------------
# installer
include(GNUInstallDirs)
if (MSVC)
install (TARGETS ${target_outputs}
EXPORT ${PROJECT_NAME}-targets