An atttempt to compile jdk/src/solaris/native/sun/awt/multiVis.c with gcc4.4.6 fails with
```
405:error: 'for' loop initial declarations are only allowed in C99 mode
405:note: use option -std=c99 to -std=gnu99 to compile your code
```
gcc4.4.6 is currently the default on Amazon Linux.

The simplest solution seems to be to add -std=c99 to CCXXFLAGS_JDK for gcc.