Date: Fri, 15 Jun 2007 19:01:19 +0200 From: "Frank Behrens" <frank@pinky.sax.de> To: freebsd-threads@freebsd.org Subject: Linking to pthread library: undefined reference Message-ID: <200706151701.l5FH1KuJ047078@pinky.frank-behrens.de>
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Hi, I could not find any information in the developers handbook, so I ask here for support. I try to link an milter (sendmail mail filter) test application and get an error I do not understand. I use FreeBSD 6.2-STABLE-200705211513 with an userland from May-03. In my Makefile I have: CFLAGS+= -I/usr/local/include -std=c99 -pthread -v LDADD+= -L/usr/local/lib -lmilter This gives linker command: cc -O2 -pipe -fno-strict-aliasing -march=pentium4 -I/usr/local/include -std=c99 -pthread -v -g - DDEBUG=1 -O1 -fno-omit-frame-pointer -Wsystem-headers -Wall -Wno-format-y2k -W - Wno-unused-parameter -Wstrict-prototypes -Wmissing-prototypes -Wpointer-arith -Wreturn- type -Wcast-qual -Wwrite-strings -Wswitch -Wshadow -Wcast-align -Wunused-parameter - Wchar-subscripts -Winline -Wnested-externs -Wredundant-decls -o fmilter fmilter.o - L/usr/local/lib -lmilter Using built-in specs. Configured with: FreeBSD/i386 system compiler Thread model: posix gcc version 3.4.6 [FreeBSD] 20060305 /usr/bin/ld -V -dynamic-linker /libexec/ld-elf.so.1 -o fmilter /usr/lib/crt1.o /usr/lib/crti.o /usr/lib/crtbegin.o -L/usr/local/lib -L/usr/lib fmilter.o -lmilter -lgcc -lpthread -lc -lgcc /usr/lib/crtend.o /usr/lib/crtn.o GNU ld version 2.15 [FreeBSD] 2004-05-23 Supported emulations: elf_i386_fbsd /usr/lib/libmilter.so: undefined reference to `pthread_detach' In my opinion the symbol should be found in /usr/lib/libpthread.so@ -> /lib/libpthread.so.2 When I look into the libraries I see > objdump -T /usr/lib/libmilter.so | fgrep detach 00000000 D *UND* 00000000 pthread_detach > objdump -T /usr/lib/libpthread.so | fgrep pthread_detach 000077d4 w DF .text 000003a4 LIBTHREAD_1_0 pthread_detach 000077d4 g DF .text 000003a4 LIBTHREAD_1_0 _pthread_detach Did I make something wrong? I guess yes, but what? Thanks for your help and best regards, Frank -- Frank Behrens, Osterwieck, Germany PGP-key 0x5B7C47ED on public servers available.
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