Description of problem:
gcl doesn't build in current devel/fc5 mock due to configure error

The end of the mock build.log: 

checking whether we are using GNU C... yes
checking whether gcc accepts -g... yes
checking how to run the C preprocessor... gcc -E
checking for gawk... gawk
checking system version (for dynamic loading)... checking for makeinfo... makeinfo
./configure: line 2412: syntax error near unexpected token `('
./configure: line 2412: `    case "`(uname -sr) 2>/dev/null`" in'
error: Bad exit status from /var/tmp/rpm-tmp.21477 (%build)


RPM build errors:
    Bad exit status from /var/tmp/rpm-tmp.21477 (%build)

Full build logs available on request.