I have some C unit tests with check framework.
My Makefile.am looks like:
check_PROGRAMS = check_fseqs
check_fseqs_SOURCES = tests/check_fseqs.c
check_fseqs_LDADD = -lcheck
File structure is (some files were omitted):
.
|-- Makefile.am
|-- configure.ac
|-- src
| |-- fseqs.c
| |-- fseqs.h
| |-- fseqs.o
`-- tests
`-- check_fseqs.c
Then I run make check and it throws:
$ make check
/Applications/Xcode.app/Contents/Developer/usr/bin/make check_fseqs
gcc -g -O2 -o check_fseqs tests/check_fseqs.o -lcheck
Undefined symbols for architecture x86_64:
"_f_msb", referenced from:
_test_f_msb in check_fseqs.o
"_min", referenced from:
_test_min in check_fseqs.o
"_substract", referenced from:
_test_substract in check_fseqs.o
ld: symbol(s) not found for architecture x86_64
clang: error: linker command failed with exit code 1 (use -v to see invocation)
make[1]: *** [check_fseqs] Error 1
make: *** [check-am] Error 2
What is wrong?
You're missing a dependency. If you're building fseqs.o, you need to add it as check_DEPENDENCIES and also add it to your check_LDADD line. If it was a library, you'd do the same thing, specifying the library file instead of all of the object files making the library up.
The check_DEPENDENCIES bit ensures the correct rule is generated, and the check_LDADD ensures the file is added to the command line while linking.