MantisBT - CMake
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IDProjectCategoryView StatusDate SubmittedLast Update
0015768CMakeCMakepublic2015-10-05 10:132016-06-10 14:31
ReporterFrancis ANDRE 
Assigned ToKitware Robot 
PrioritynormalSeverityfeatureReproducibilityalways
StatusclosedResolutionmoved 
PlatformCygwinOSCYGWIN_NT-6.1-WOW idefix 2.2.1(0OS Version
Product VersionCMake 3.3.2 
Target VersionFixed in Version 
Summary0015768: Cygwin: create and install symbolic link for a versioned shared library
DescriptionHi

This command
install(
    TARGETS "${target_name}" EXPORT "${target_name}Targets"
    LIBRARY DESTINATION lib${LIB_SUFFIX}
    ARCHIVE DESTINATION lib${LIB_SUFFIX}
    RUNTIME DESTINATION bin
    INCLUDES DESTINATION include
    )

install the lib shared library with a symbolic link on Linux while it does not install a symbolic link on the archive on Cygwin, neither he does install a symbolic link on the runtime destination
Steps To Reproduce1/ Build a shared library on Cygwin
2/ install it
3/ No symbolic link are defined for the archive library, nor for the shared library.
Additional Information
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Issue History
Date ModifiedUsernameFieldChange
2015-10-05 10:13Francis ANDRENew Issue
2015-10-06 10:06Brad KingNote Added: 0039514
2015-10-07 06:21Francis ANDRENote Added: 0039525
2015-10-08 10:08Brad KingSeverityminor => feature
2015-10-08 10:08Brad KingStatusnew => backlog
2015-10-08 10:08Brad KingSummaryinstall command does not install symbolic link for a versioned shared library => Cygwin: create and install symbolic link for a versioned shared library
2015-10-10 07:11Francis ANDRENote Added: 0039561
2016-06-10 14:29Kitware RobotNote Added: 0042849
2016-06-10 14:29Kitware RobotStatusbacklog => resolved
2016-06-10 14:29Kitware RobotResolutionopen => moved
2016-06-10 14:29Kitware RobotAssigned To => Kitware Robot
2016-06-10 14:31Kitware RobotStatusresolved => closed

Notes
(0039514)
Brad King   
2015-10-06 10:06   
Cygwin is built on Windows and so uses a separate import library for linking (e.g. "mylib.dll.a" for "mylib.dll"). CMake's logic on such DLL platforms installs the import library:

 https://cmake.org/gitweb?p=cmake.git;a=blob;f=Source/cmInstallCommand.cxx;hb=v3.3.2#l362 [^]
 https://cmake.org/gitweb?p=cmake.git;a=blob;f=Source/cmInstallCommand.cxx;hb=v3.3.2#l453 [^]

If Cygwin conventions have changed then CMake will need to be updated.
(0039525)
Francis ANDRE   
2015-10-07 06:21   
For a shared library name PocoZip with a SOVERSION=40, CMake/make install generates

on Linux
lrwxrwxrwx. 1 root root 16 7 oct. 12:11 /usr/local/lib/libPocoZip.so -> libPocoZip.so.40
-rwxr-xr-x. 1 root root 392424 7 oct. 12:01 /usr/local/lib/libPocoZip.so.40

on Cygwin in /usr/local/bin
-rwxr-xr-x 1 FrancisANDRE None 3990183 Oct 7 12:06 cygPocoZip-40.dll
on Cygwin in /usr/local/lib
-rw-r--r-- 1 FrancisANDRE None 526798 Oct 7 12:06 libPocoZip.dll.a


This issue asks Cmake/make install to generate an similar symbolic link on Cygwin as the one on Linux as

on Cygwin in /usr/local/bin
-rwxr-xr-x 1 FrancisANDRE None 3990183 Oct 7 12:06 cygPocoZip-40.dll
on Cygwin in /usr/local/lib
-rw-r--r-- 1 FrancisANDRE None 526798 Oct 7 12:06 libPocoZip-40.dll.a
lrwxrwxrwx 1 FrancisANDRE None 19 Oct 7 12:20 libPocoZip.dll.a -> libPocoZip-40.dll.a

This will allow to nstall multiple version of the same shared library which actually is impossible.
(0039561)
Francis ANDRE   
2015-10-10 07:11   
By the way, there should be also a symbolic link on the ddl for dlopen function call. The link should omit the SOVERSION as for the imported lib

on Cygwin in /usr/local/bin
-rwxr-xr-x 1 FrancisANDRE None 3990183 Oct 7 12:06 cygPocoZip-40.dll
lrwxrwxrwx 1 FrancisANDRE None 19 Oct 7 12:20 cygPocoZip.dll -> cygPocoZip-40.dll
(0042849)
Kitware Robot   
2016-06-10 14:29   
Resolving issue as `moved`.

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