preprocessed F90 using IBM XL F90 compiler

[Dr Magnus Hagdorn]

Hi all,
I define symbols using AC_DEFINE which should be passed to the
preprocessor to optionally compile certain parts. This all works fine
except for when the IBM XL f90 compiler is used. This compiler does not
have the -D switch to pass options to the preprocessor and instead
expects -WF,-D. I tried to redefine the DEFS macro in the Makefile.am to
something like
if AIX_XL
 DEFS = $(DEFS:-D%=-WF,-D%)
endif
however make complains about infinite recursion. 
Any suggestions on how to solve this problem?
Cheers
magnus

-- 
Dr Magnus Hagdorn <address@hidden>