RFR: JDK-8077113: Configure script do not properly detect cross-compilation gcc

[Magnus Ihse Bursie]

It was that simple? :-) Great!

The fix looks good. 

/Magnus

> 22 feb. 2017 kl. 15:05 skrev Erik Joelsson <erik.joelsson at oracle.com>:
> 
> Hello,
> 
> When doing cross-compilation, a tool like nm gets picked up like '<platform>-linux-gnu-nm' but '<platform>-linux-gnu-gcc' will not. My fix uses AC_PATH_TOOL instead of AC_PATH_PROGS when actually searching for the compilers, which will look for the prefixed version of the tool first. The only drawback is that AC_PATH_TOOL does not accept multiple program names to search for, but we don't use that anyway. For each toolchain type, we only ever expect one name for the compiler. If we need to support multiple names, we can add a loop then.
> 
> Bug: https://bugs.openjdk.java.net/browse/JDK-8077113
> 
> Webrev: http://cr.openjdk.java.net/~erikj/8077133/webrev.01/
> 
> /Erik
>