Does not build for FreeBSD/386

[snowirbis]

When building on FreeBSD/amd64 for target GOARCH=386, example.go does not compile with the following errors:

/export/roman/go/src/github.com/takama/daemon/daemon.go:185: undefined: newDaemon
/export/roman/go/src/github.com/takama/daemon/daemon.go:190: undefined: execPath
/export/roman/go/src/github.com/takama/daemon/helper.go:46: undefined: execPath
/export/roman/go/src/github.com/takama/daemon/helper.go:50: undefined: execPath

Here is full output of % go build GOOS=freebsd GOARCH=386 takama-daemon.go

% uname -a ; gcc -v; env GOOS=freebsd GOARCH=386 go build -v -compiler gc takama-daemon.go
FreeBSD nas.home.lan 10.3-RELEASE-p11 FreeBSD 10.3-RELEASE-p11 #0: Mon Oct 24 18:49:24 UTC 2016 root@amd64-builder.daemonology.net:/usr/obj/usr/src/sys/GENERIC amd64
Using built-in specs.
COLLECT_GCC=gcc
COLLECT_LTO_WRAPPER=/usr/local/libexec/gcc48/gcc/x86_64-portbld-freebsd10.1/4.8.5/lto-wrapper
Target: x86_64-portbld-freebsd10.1
Configured with: /wrkdirs/usr/ports/lang/gcc/work/gcc-4.8.5/configure --disable-bootstrap --disable-nls --enable-gnu-indirect-function --libdir=/usr/local/lib/gcc48 --libexecdir=/usr/local/libexec/gcc48 --program-suffix=48 --with-as=/usr/local/bin/as --with-gmp=/usr/local --with-gxx-include-dir=/usr/local/lib/gcc48/include/c++/ --with-ld=/usr/local/bin/ld --with-pkgversion='FreeBSD Ports Collection' --with-system-zlib --with-ecj-jar=/usr/local/share/java/ecj-4.5.jar --enable-languages=c,c++,objc,fortran,java --prefix=/usr/local --localstatedir=/var --mandir=/usr/local/man --infodir=/usr/local/info/gcc48 --build=x86_64-portbld-freebsd10.1
Thread model: posix
gcc version 4.8.5 (FreeBSD Ports Collection)
runtime/internal/sys
runtime/internal/atomic
runtime
sync/atomic
errors
internal/race
math
unicode
unicode/utf8
internal/nettrace
sync
io
syscall
internal/singleflight
bytes
strings
math/rand
strconv
time
reflect
os
vendor/golang_org/x/net/route
os/signal
fmt
sort
path/filepath
regexp/syntax
io/ioutil
context
text/template/parse
net/url
log
net
os/exec
regexp
text/template
github.com/takama/daemon

github.com/takama/daemon

/export/roman/go/src/github.com/takama/daemon/daemon.go:185: undefined: newDaemon
/export/roman/go/src/github.com/takama/daemon/daemon.go:190: undefined: execPath
/export/roman/go/src/github.com/takama/daemon/helper.go:46: undefined: execPath
/export/roman/go/src/github.com/takama/daemon/helper.go:50: undefined: execPath

No such issues when building for freebsd/amd64, linux/386, linux/arm, windows/386 and windows/amd64. Builds fine.

Not tested for others.

[derkan]

Try enabling CGO with CGO_ENABLED=1 as we are importing "C".

[derkan]

Pls check #58

[takama]

Thank you, good patch!
Could you make the pull request in develop branch?