Build error groonga 4.0.0

[hidemaru76]

As described below, an error is displayed.

In file included from expr.c:5559:
ecmascript.c: In function 'yy_destructor':
ecmascript.c:876: warning: unused variable 'efsi'
gcc: Internal error: Killed (program cc1)

[kenhys]

It seems that build process is killed by OOMKiller.
To build Groonga, at least 1-2GB memory is required because of compiler optimization(-O2).
For example, if you build Groonga on VPS which doesn't have enough memory, you may face such a error.
There are workaroud for this issue:

1. Use pre built packages - deb or rpm provided by Groonga project.(Recommended)
2. Disable compiler optimization (There is performance penalty, so not recommended)

I recommend (1). but is there special reason build Groonga by yourself?

[kenhys]

Here is the related issue:
suer/redmine_milkode#1

So I recommends to install groonga-devel package on CentOS 6 at first.

[kenhys]

It seems that @hidemaru76 has solved this issue by installing Groonga packages instead of building by himself.
suer/redmine_milkode#1 (comment)