Building example throws undefined references

[Himeshi]

Tried to build the example on Ubuntu 14.04 in check-0.12.0 with check installed from source using cmake (because the ap-get sources aren't up to date and was missing some basic functions such as ck_assert_float_eq). It fails with following errors.

[ 16%] Building C object src/CMakeFiles/money.dir/money.c.o
[ 33%] Linking C static library libmoney.a
[ 33%] Built target money
Scanning dependencies of target main
[ 50%] Building C object src/CMakeFiles/main.dir/main.c.o
[ 66%] Linking C executable main
[ 66%] Built target main
Scanning dependencies of target check_money
[ 83%] Building C object tests/CMakeFiles/check_money.dir/check_money.c.o
[100%] Linking C executable check_money
/usr/local/lib/libcheck.a(check.c.o): In function `tcase_create':
check-0.11.0/src/check.c:145: undefined reference to `floor'
check-0.11.0/src/check.c:148: undefined reference to `floor'
/usr/local/lib/libcheck.a(check.c.o): In function `tcase_set_timeout':
check-0.11.0/src/check.c:332: undefined reference to `floor'
check-0.11.0/src/check.c:334: undefined reference to `floor'
/usr/local/lib/libcheck.a(check.c.o): In function `check_get_clockid':
check-0.11.0/src/check.c:616: undefined reference to `timer_create'
check-0.11.0/src/check.c:618: undefined reference to `timer_delete'
/usr/local/lib/libcheck.a(check_run.c.o): In function `tcase_run_tfun_fork':
check-0.11.0/src/check_run.c:507: undefined reference to `timer_create'
check-0.11.0/src/check_run.c:515: undefined reference to `timer_settime'
check-0.11.0/src/check_run.c:529: undefined reference to `timer_delete'
collect2: error: ld returned 1 exit status
tests/CMakeFiles/check_money.dir/build.make:96: recipe for target 'tests/check_money' failed
make[2]: *** [tests/check_money] Error 1
CMakeFiles/Makefile2:179: recipe for target 'tests/CMakeFiles/check_money.dir/all' failed
make[1]: *** [tests/CMakeFiles/check_money.dir/all] Error 2
Makefile:138: recipe for target 'all' failed
make: *** [all] Error 2

[brarcher]

This appears to be an issue with linking statically but the static flags from libcheck are not being included. I wonder if this is an issue with the pkg-config file installed by Ubuntu is being used and not the file which you installed along with Check when you compiled from source. The example builds and tests successfully on Linux and macOS for me, so my hunch is it is something about the old Check trying to be used instead of the Check you built.

Here is another issue logged about Check and Ubuntu, in case it is helpful.

[Misairu-G]

Ubuntu 16.04, I resolved this by changing STATIC to SHARED of the add_library command in lib/CMakeLists.txt and src/CMakeLists.txt before compile check

[brarcher]

Unfortunately, changing from STATIC to SHARED breaks the Windows builds, and CMake is primarily used to support Windows. Is the same issue found when using the configure script? The configure script is the official support path for *nix.

[Himeshi]

Using the configure script instead of cmake when building resolved this issue.

[elken]

If it's a consideration to push forward with only CMake, adding a platform check such as if(WIN32) could be used to distinguish between platforms. Can confirm it works with projects I've worked on, couldn't vouch on its success here but I could sure test it.

[dernasherbrezon]

Had the same error. Fixed by installing "pkg-config":

sudo apt-get install pkg-config

[mikkoi]

The version 0.13.0 CMake build should fix this.

[jgcrunden]

I had the same error too, building in a Debian based docker container.
I added the following condition into my CMakeList.txt file to check for a Debian based distro and to dynamically link the math, rt, pthread and subunit libraries if true. My programme now compiles in the docker container (Debian), and both on my Arch Linux dev environment and Windows (cygwin) dev environment where else() part of the condition is met.

find_program(DEBIAN "dpkg")
if(DEBIAN)
    target_link_libraries(${PROJECT_NAME} check m rt pthread subunit)
else()
    target_link_libraries(${PROJECT_NAME} check)
endif()