Public bug reported:
For this simple code:
#include <math.h>
int main(void)
{
log(0.0);
return 0;
}
when compiled with `gcc -lm foo.c`, you would always get the following
error message:
/tmp/ccTTLEYA.o: In function `main':
foo.c:(.text+0x9): undefined reference to `log'
collect2: error: ld returned 1 exit status
which doesn't make sense.
I tried the same code to be compiled with `clang -lm foo.c`, which
compiles successfully.
Also, I tried the same code on a RHEL 6 machine with gcc, which compiles
successfully.
ProblemType: Bug
DistroRelease: Ubuntu 14.04
Package: libc6-dev 2.19-0ubuntu6
ProcVersionSignature: Ubuntu 3.13.0-29.53-generic 3.13.11.2
Uname: Linux 3.13.0-29-generic x86_64
NonfreeKernelModules: nvidia
ApportVersion: 2.14.1-0ubuntu3.2
Architecture: amd64
CurrentDesktop: Unity
Date: Mon Jun 9 00:28:33 2014
InstallationDate: Installed on 2014-05-27 (12 days ago)
InstallationMedia: Ubuntu 14.04 LTS "Trusty Tahr" - Release amd64 (20140417)
SourcePackage: eglibc
UpgradeStatus: No upgrade log present (probably fresh install)
** Affects: eglibc (Ubuntu)
Importance: Undecided
Status: New
** Tags: amd64 apport-bug trusty
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https://bugs.launchpad.net/bugs/1327971
Title:
libm log function: always unreferenced
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