> On 12 Feb 2020, at 11:54, Peter Eisentraut <peter.eisentr...@2ndquadrant.com> > wrote: > > On 2020-02-11 10:34, Daniel Gustafsson wrote: >> Pardon my weak autoconf-skills, what does the inverted brackets (]foo[ as >> opposed to [foo]) do in the below? >> -Please also contact<pgsql-b...@lists.postgresql.org> to see about >> +Please also contact <]AC_PACKAGE_BUGREPORT[> to see about > > AC_PACKAGE_BUGREPORT is an Autoconf macro, set up by AC_INIT. The call above > is in the context of > > AC_MSG_ERROR([[ ... text ... ]]) > > The brackets are quote characters that prevent accidentally expanding a token > in the text as a macro. So in order to get AC_PACKAGE_BUGREPORT expanded, we > need to undo one level of quoting. > > See also > <https://www.gnu.org/savannah-checkouts/gnu/autoconf/manual/autoconf-2.69/html_node/M4-Quotation.html#M4-Quotation> > for more information.
Aha, that's what I was looking for in the docs but didn't find. Thanks for sharing! cheers ./daniel
