Actually, it is getconf which is used for maximum portability. The POSIX manual has more on that. It's a little-known but quite a useful tool in the shell toolbox.
--Rakesh ---------------------------------------- > Date: Tue, 4 Aug 2015 13:49:06 +0200 > From: reinp...@win.tue.nl > To: help-make@gnu.org > Subject: Re: Conditional include directories > > On Tue Aug 4 04:03:32 2015, sharma...@hotmail.com (Rakesh Sharma) wrote: >> One way can be as follows: >> >> ## pre-define your library directories based on the output of the "getconf" >> output format >> LIB_32 := /stage2/lib/dbus-1.0/include >> LIB_64 := /stage2/lib64/dbus-1.0/include >> >> # then compute the architecture of the machine running gmake >> CFLAGS := -I$(LIB_$(strip $(shell getconf LONG_BIT))) >> >> ### now you are all set for using the CFLAGS in your build code. >> ## you may want to incorporate some amount of error checking >> # when the `getconf' command delivers output different than either 32 or 64. >> >> # another method could be to invoke the "uname -m" command. > > How portable is this software supposed to be? > > uname exists on all the Unixy systems I've used; > I'm not sure about getconf, but I notice it exists on Cygwin. > > -- > Reinier Post > TU Eindhoven > > _______________________________________________ > Help-make mailing list > Help-make@gnu.org > https://lists.gnu.org/mailman/listinfo/help-make _______________________________________________ Help-make mailing list Help-make@gnu.org https://lists.gnu.org/mailman/listinfo/help-make
