Date: Fri, 05 Jul 1996 20:24:18 BST From: Michael Searle <searle@longacre.demon.co.uk> To: questions@freefall.freebsd.org Subject: C libraries Message-ID: <mE9178E39@longacre.demon.co.uk>
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I have been having some problems getting C programs containing calls in
math.h to link - is there a special library I have to use? I wrote a test
program using sqrt(), but I get the same stuff for pow(), trig functions,
etc. I am using standard gcc 2.6.3 on FreeBSD 2.1R. Here is the test
program, the output I got from the linker, and my /usr/lib directory.
It compiles and links OK, just using 'gcc sqrt.c -o sqrt', on a different
(not FreeBSD) system running gcc 2.4.5.
Also, one of the programs also needed Motif (the Xm library) to compile. Is
there a free static version of the Motif library? (If so, where can I
download it from?)
sqrt.c:
#include <math.h>
#include <stdio.h>
int main() {
double x;
fprintf(stdout,"What is your number?");
fscanf(stdin,"%lf",&x);
fprintf(stdout,"The square root of %lf is %lf.",x,sqrt(x));
exit();
}
#cc sqrt.c -o sqrt
/var/tmp/cc0002661.o: Undefined symbol '_sqrt' referenced from text segment
#cc sqrt.c -o sqrt -L/usr/lib -lc
/var/tmp/cc0002731.o: Undefined symbol '_sqrt' referenced from text segment
#cc sqrt.c -o sqrt -L/usr/lib -lgcc
/var/tmp/cc0002781.o: Undefined symbol '_sqrt' referenced from text segment
/usr/lib/libgcc.so.261.0: Undefined symbol '_sdiv_qrnnd' referenced
_udiv_w_sdiv.o: Undefined symbol '_sdiv_qrnnd' referenced from text segment
_udiv_w_sdiv.o: Undefined symbol '_sdiv_qrnnd' referenced from text segment
_udiv_w_sdiv.o: Undefined symbol '_sdiv_qrnnd' referenced from text segment
_udiv_w_sdiv.o: Undefined symbol '_sdiv_qrnnd' referenced from text segment
#ls /usr/lib
c++rt0.o libgcc.a libreadline_p.a
crt0.o libgcc.so.261.0 libresolv.a
gcrt0.o libgcc_p.a libresolv.so.2.0
kzhead.o libgcc_pic.a libresolv_p.a
kztail.o libgnumalloc.a librpcsvc.a
libc.a libgnumalloc.so.2.0 librpcsvc.so.2.0
libc.so.2.2 libgnumalloc_p.a librpcsvc_p.a
libc.so.3.0 libgnuregex.a libscrypt.a
libc_p.a libgnuregex.so.2.0 libscrypt.so.2.0
libc_pic.a libgnuregex_p.a libscrypt_p.a
libcom_err.a libkeycap.a libscsi.a
libcom_err.so.2.0 libkeycap_p.a libscsi.so.2.0
libcom_err_p.a libkvm.a libscsi_p.a
libcompat.a libkvm.so.2.0 libskey.a
libcompat_p.a libkvm_p.a libskey.so.2.0
libcrypt.a@ libl.a libskey_p.a
libcrypt.so.2.0@ libl_p.a libss.a
libcrypt_p.a@ libldso.a libss.so.2.0
libcurses.a libln.a libss_p.a
libcurses.so.2.0 libln_p.a libtelnet.a
libcurses_p.a libm.a libtelnet.so.2.0
libdialog.a libm.so.2.0 libtelnet_p.a
libdialog.so.3.0 libm_p.a libtermcap.a
libdialog_p.a libmd.a libtermcap.so.2.1
libedit.a libmd_p.a libtermcap_p.a
libedit.so.2.0 libmytinfo.a libtermlib.a
libedit_p.a libmytinfo.so.2.0 libtermlib.so.2.1
libf2c.a libmytinfo_p.a libtermlib_p.a
libf2c.so.2.0 libncurses.a libutil.a
libf2c_p.a libncurses.so.3.0 libutil.so.2.0
libforms.a libncurses_p.a libutil_p.a
libforms.so.3.0 libpcap.a liby.a
libforms_p.a libpcap.so.2.0 liby.so.2.0
libg++.a libpcap_p.a liby_p.a
libg++.so.3.0 libreadline.a
libg++_p.a libreadline.so.3.0
--
Michael Searle - searle@longacre.demon.co.uk
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