# Try # GCC -std=gnu99 -std=c99 -std=iso9899:1999 # AIX -qlanglvl=extc99 -qlanglvl=stdc99
Here are a few more, gleaned from Google (not tested):
IRIX: -c99
(http://www.sgi.com/products/software/irix/tools/c.html, http://www.chemie.fu-berlin.de/cgi-bin/man/sgi_irix?c99+1)
Tru64: -c99 (http://devrsrc1.external.hp.com/STKT/impacts/i330.html)
Solaris: -xc99 (c99 lang support on by default in newer compilers) (http://docs.sun.com/source/817-6697/cc_ops.app.html#43104)
Intel icc: -c99
So, -c99 seems to be the most popular.
Steven
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