error: Cannot build without ffsl(3) or __builtin_ffsl()

[Virtlink]

I'm trying to build Rust to cross-compile to i686-unknown-linux-gnu, but I run into an error when it compiles jemalloc. I was directed here from my Rust issue.

On a fresh installation of Linux Mint 17 Qiana MATE 64-bit (in VirtualBox), I execute the following series of commands:

sudo apt-get install g++
sudo apt-get install curl
sudo apt-get install libc6-dev-i386
cd
mkdir src
cd src
git clone https://github.com/rust-lang/rust.git
cd rust
./configure --target=i686-unknown-linux-gnu
make

Then after a while I get this error:

checking whether utrace(2) is compilable... no
checking whether valgrind is compilable... no
checking whether a program using __builtin_ffsl is compilable... no
checking whether a program using ffsl is compilable... no
configure: error: Cannot build without ffsl(3) or __builtin_ffsl()
make: *** [i686-unknown-linux-gnu/rt/jemalloc/lib/libjemalloc_pic.a] Error 1

This only happens when compiling to a different target than the default. I'm using:

• g++ 4.8.2-19ubuntu
• clang++ not installed
• python 2.7.6
• perl 5.18.2
• make 3.81
• curl 7.35.0
• git 1.9.1

[jasone]

This is likely fixed by 1a3eafd, which is not yet part of an official release.

[jasone]

Please re-open if this issue still exists in the dev branch.