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From: | Bob Friesenhahn |
Subject: | Re: question about whether to set CFLAGS in configure.ac |
Date: | Thu, 1 Dec 2005 09:33:41 -0600 (CST) |
On Thu, 1 Dec 2005, Brian Lloyd wrote:
Try this. saved_CFLAGS=$CFLAGS CFLAGS="$CFLAGS -I$(HDF5DIR)/include -L$(HDF5DIR)/lib"AC_CHECK_LIB([hdf5], [H5Fflush], [], [nc_hdf5_lib_missing=yes])CFLAGS=$saved_CFLAGS This gives the needed CFLAGS for the CHECK_LIB function, but leaves the CFLAGS variable set as it was before this call.
Any -I options should be appended to CPPFLAGS and any -L options should be appended to LDFLAGS. While the approach of temporarily updating a variable is the right one, this example is improperly using CFLAGS.
Bob ====================================== Bob Friesenhahn address@hidden, http://www.simplesystems.org/users/bfriesen/ GraphicsMagick Maintainer, http://www.GraphicsMagick.org/
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