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- # ===========================================================================
- # https://www.gnu.org/software/autoconf-archive/ax_check_strcspn.html
- # ===========================================================================
- #
- # SYNOPSIS
- #
- # AX_CHECK_STRCSPN
- #
- # DESCRIPTION
- #
- # Not all systems have strcspn(3). See if we need to substitute. To make
- # this work, you have to do horrible things. In one of your Makefile.am
- # files, you must make an explicit rule to make this object. It should
- # look like this:
- #
- # strcspn.lo : $(top_srcdir)/compat/strcspn.c
- # $(LTCOMPILE) -o $@ -c $(top_srcdir)/compat/strcspn.c
- #
- # and you must include ``@COMPATOBJ@'' in a LIBADD somewhere and, finally,
- # you must add another artificial dependency, something like:
- #
- # makeshell.lo : genshell.c @COMPATOBJ@
- #
- # It is all pretty horrific, but I have found nothing else that works.
- #
- # LICENSE
- #
- # Copyright (c) 2008 Bruce Korb <bkorb@gnu.org>
- #
- # Copying and distribution of this file, with or without modification, are
- # permitted in any medium without royalty provided the copyright notice
- # and this notice are preserved. This file is offered as-is, without any
- # warranty.
-
- #serial 6
-
- AU_ALIAS([AG_CHECK_STRCSPN], [AX_CHECK_STRCSPN])
- AC_DEFUN([AX_CHECK_STRCSPN],[
- AC_MSG_CHECKING([whether strcspn matches prototype and works])
- AC_CACHE_VAL([ax_cv_strcspn],[
- AC_TRY_RUN([#include <string.h>
- int main (int argc, char** argv) {
- char zRej[] = "reject";
- char zAcc[] = "a-ok-eject";
- return strcspn( zAcc, zRej ) - 5;
- }],[ax_cv_strcspn=yes],[ax_cv_strcspn=no],[ax_cv_strcspn=no]
- ) # end of TRY_RUN]) # end of CACHE_VAL
-
- AC_MSG_RESULT([$ax_cv_strcspn])
- if test x$ax_cv_strcspn = xyes
- then
- AC_DEFINE(HAVE_STRCSPN, 1,
- [Define this if strcspn matches prototype and works])
- else
- COMPATOBJ="$COMPATOBJ strcspn.lo"
- fi
- ]) # end of AC_DEFUN of AX_CHECK_STRCSPN
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