pcre linking

[jasonlfunk]

I'm having trouble getting pcre to link with my program. Any ideas as to why?




$ make clean && make
rm -f *.o
cc -Wall -g -I.. -I/usr/local/include/libxml2 -I/usr/local/include -L/usr/lib -lpcre -c -o example.o example.c
cc -Wall -g -I.. -I/usr/local/include/libxml2 -I/usr/local/include -L/usr/lib -lpcre -c -o ps_dlp_api.o ps_dlp_api.c
cc -o example example.o ps_dlp_api.o
ps_dlp_api.o: In function `ca_alg_matches':
/home/jasonfunk/workspace/dlpsdk/C/ps_dlp_api.c:1109: undefined reference to `pcre_exec'
collect2: ld returned 1 exit status
make: *** [example] Error 1


$ pcre-config --libs
-L/usr/lib -lpcre



$ uname -a
Linux jasonfunk-laptop 2.6.32-30-generic #59-Ubuntu SMP Tue Mar 1 21:30:21 UTC 2011 i686 GNU/Linux


$ dpkg --get-selections | grep pcre
libpcre++0 deinstall
libpcre3 install
libpcre3-dev install
libpcrecpp0 install

[Some Penguin]

-lpcre doesn't mean very much when you're compiling individual object files; you need to set it for the *linking* phase when you build the executable (e.g. in LDFLAGS if you're using a fairly traditional Makefile). Your linking command doesn't have it.