On Fri, 30 Aug 2019, Quaquaraqua wrote:
Hi there,
how can we check if a macro has been previously defined with AC_DEFINE ?
For instance, something like the following piece of code:
AX_OPENMP dnl it sets AC_DEFINE(HAVE_OPENMP,1) in case of success
...
m4_ifdef([[HAVE_OPENMP]], dnl how to check if HAVE_OPENMP has been defined?
[ ... do something ... ],
[ ... do something else ... ]
)
I'm aware that, as workaround, AX_OPENMP can take two optional arguments,
ACTION-IF-FOUND and ACTION-IF-NOT-FOUND but I am
restricted to use them atm.
It seems that cached test results are normally stored in variables of
the form "ac_cv_have_FOO". Check the generated config.status script
for the exact name to test.
Bob
--
Bob Friesenhahn
bfrie...@simple.dallas.tx.us, http://www.simplesystems.org/users/bfriesen/
GraphicsMagick Maintainer, http://www.GraphicsMagick.org/
Public Key, http://www.simplesystems.org/users/bfriesen/public-key.txt
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