From mboxrd@z Thu Jan 1 00:00:00 1970 From: Doug Evans To: "Russ.Shaw" Cc: crossgcc@sourceware.cygnus.com Subject: Library and linker errors Date: Tue, 01 Aug 2000 23:10:00 -0000 Message-id: <14727.47860.955266.603288@casey.transmeta.com> References: <001101c01fe1$7e10b260$58210b0a@huawei.com.cn> <3987B6DA.61538FBF@webaxs.net> X-SW-Source: 2000-08/msg00004.html Russ.Shaw writes: > However, i get lots of linker errors like: > > /usr/local/h8300-hms/lib/libg.a(strtol.o)(.text+0xfa):strtol.c: > undefined reference to '__umodsi3' > /usr/local/h8300-hms/lib/libg.a(strtol.o)(.text+0x10a):strtol.c: > undefined reference to '__udivsi3' > /usr/local/h8300-hms/lib/libg.a(strtol.o)(.text+0x152):strtol.c: > undefined reference to '__umulsi3' > > I can't find where __umodsi3 etc are defined. In my makefile, i'm > linking ld using -lgcc -liberty -lg -lc -lm. Put -lgcc at the _end_, as in -liberty -lg -lc -lm -lgcc. Remember that libraries are used to resolve undefined symbols where they appear on the command line. If a later library depends on the symbols of an earlier library, you will not get them, and that is what you are seeing here (-lg needs something in -lgcc, but -lgcc appears too soon on the command line). Actually, even that may not be sufficient (depending on the target). GCC, when it does the link, puts -lgcc -lc -lgcc at the end. This catches the case where libgcc references something in libc. Why use ld to link at all? Why not use gcc? [One case where people get into particular trouble is if they're using multilib'd libraries. That can happen for the h8/300h, I think (it's been awhile). It may be the case that the default is the h8/300, and you compile with -mh. If that's the case then you do NOT want the libraries in /usr/local/h8300-hms/lib, but rather the ones in /usr/local/h8300-hms/lib/h8300h [or some such]. Ergo ---> just use gcc to link and let it worry about it. [Of course, I could be all wet here with regards to your particular situation. Question: Does /usr/local/h8300-hms/lib/h8300h exist on your system?] ------ Want more information? See the CrossGCC FAQ, http://www.objsw.com/CrossGCC/ Want to unsubscribe? Send a note to crossgcc-unsubscribe@sourceware.cygnus.com