AC_CHECK_PROGS and java compiler options

[John Calcote]

I'm wondering about best practices for checking for programs like the 
javac compiler. For instance, I currently have a line in my project's 
configure.ac file that looks like this:

AC_CHECK_PROGS([JAVAC], ["gcj -C -ftarget=1.4 -fsource=1.4" "guavac 
-target 1.4 -source 1.4" "jikes -target 1.4 -source 1.4" "javac -target 
1.4 -source 1.4"])

Ugly. This line used to look like this before I needed to specify 
particular source and target versions for my Java code:

AC_CHECK_PROGS([JAVAC], ["gcj -C" guavac jikes javac])

That wasn't bad, but now I'm duplicating flags all over the place just 
because "gcj -C" requires a different set of options for JVM target and 
source version specification than the other java compilers do. If they 
were the same, I'd just append them to JAVACFLAGS and be done with it.

Any input would be appreciated.

Thanks,
John