On 08/16/2015 05:27 PM, [email protected] wrote: > Hi list, > > I'm not a m4/autotools expert and such i'm a bit stuck with codes below (from > "m4/universal.m4")
why do you want to know? many consider m4 as dark magic, and there's a reason for that. usually you should just *use* the m4-macros, rather than trying to understand them. > > https://github.com/pure-data/pure-data/blob/master/m4/universal.m4#L68 > > $1[]_CFLAGS="$[]$1[]_CFLAGS $_pd_universal" > $1[]_LDFLAGS="$[]$1[]_LDFLAGS $_pd_universal" > > What's the meaning of the "$1[]" and "$[]$1[]" syntaxes? those are expanded during m4-expansion to proper values, depending on the arguments to the enclosing m4-macro. e.g. calling `PD_CHECK_UNIVERSAL(KNORZ)` (in configure.ac), will expand those variables to KNORZ_CFLAGS resp. KNORZ_LDFLAGS. iirc, the empty expansion syntax ("$[]") is mainly there for proper escaping. gfmsdr IOhannes _______________________________________________ Pd-dev mailing list [email protected] http://lists.puredata.info/listinfo/pd-dev
