William A. Hoffman wrote:
At 01:22 PM 6/1/2006, Brandon J. Van Every wrote:
Brad King wrote:
Brandon J. Van Every wrote:
I built a CMake 2.4.2 for Cygwin from sources. I used the "Unix linefeed" download, cmake-2.4.2.tar.gz. I used an earlier Cygwin CMake package to build it. Now I am using this Cygwin CCMake 2.4.2 to generate my Chicken build. When it comes time to link a .dll, it fails with:
Linking C shared library libchicken.dll
/usr/lib/gcc/i686-pc-cygwin/3.4.4/../../../../i686-pc-cygwin/bin/ld: cannot find
-ldl
collect2: ld returned 1 exit status
make[2]: *** [libchicken.dll] Error 1
make[1]: *** [CMakeFiles/libchicken.dir/all] Error 2
make: *** [all] Error 2
If libchicken is trying to link to -ldl this is probably because you are telling to do so somewhere in your CMakeLists.txt code.
Hm! You know, there is a conditional -ldl in there. I haven't noticed that in a long time. I wonder why it's giving this behavior on Cygwin when previously it didn't. I will investigate.
There is a variable CMAKE_DL_LIBS, that you can use without an if.
TARGET_LINK_LIBRARIES(chicken ... ${CMAKE_DL_LIBS})
I have investigated, and I'm not convinced that the -ldl is coming from
my code. My code is:
CHECK_INCLUDE_FILE(dl.h HAVE_DL_H)
IF(HAVE_DL_H)
ADD_DEFINITIONS(-DHAVE_DL_H)
SET(EXTRA_LIBS ${EXTRA_LIBS} ldl)
ENDIF(HAVE_DL_H)
There is no dl.h on any hard drive of my system. Which is to be
expected, as it's a Linux thing. I think the -ldl more likely from
building CMake 2.4.2 on Cygwin incorrectly. I will await your
canonical version and see if the problem goes away.
Cheers,
Brandon Van Every
|
_______________________________________________
CMake mailing list
[email protected]
http://www.cmake.org/mailman/listinfo/cmake
