add an example configure.local based on mandoc-portable' one

configure.local.example

@@ -0,0 +1,66 @@
+#
+# Copyright (c) 2014-2022 Ingo Schwarze <schwarze@openbsd.org>
+#
+# Permission to use, copy, modify, and distribute this software for any
+# purpose with or without fee is hereby granted, provided that the above
+# copyright notice and this permission notice appear in all copies.
+#
+# THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
+# WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
+# MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
+# ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
+# WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
+# ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
+# OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
+
+# For all settings documented in this file, there are reasonable
+# defaults and/or the ./configure script attempts autodetection.
+# Consequently, you only need to create a file ./configure.local
+# and put any of these settings into it if ./configure autodetection
+# fails or if you want to make different choices for other reasons.
+
+# If autodetection fails, please tell <gmid@omarpolo.com>.
+
+# We recommend that you write ./configure.local from scratch and
+# only put the lines there you need.  This file contains examples.
+# It is not intended as a template to be copied as a whole.
+
+# Some systems may want to set additional linker flags for all the
+# binaries, not only for those using libmandoc, for example for
+# hardening options.
+
+LDFLAGS="-Wl,-z,relro"
+
+# It is possible to change the utility program used for installation
+# and the modes files are installed with.  The defaults are:
+
+INSTALL="install"
+INSTALL_PROGRAM="${INSTALL} -m 0555"
+INSTALL_LIB="${INSTALL} -m 0444"
+INSTALL_MAN="${INSTALL} -m 0444"
+INSTALL_DATA="${INSTALL} -m 0444"
+
+# In rare cases, it may be required to skip individual automatic tests.
+# Each of the following variables can be set to 0 (test will not be run
+# and will be regarded as failed) or 1 (test will not be run and will
+# be regarded as successful).
+
+HAVE_ERR=0
+HAVE_EXPLICIT_BZERO=0
+HAVE_FREEZERO=0
+HAVE_GETDTABLECOUNT=0
+HAVE_GETDTABLESIZE=0
+HAVE_GETPROGNAME=0
+HAVE_IMSG=0
+HAVE_LANDLOCK=0
+HAVE_PR_SET_NAME=0
+HAVE_PROGRAM_INVOCATION_SHORT_NAME=0
+HAVE_QUEUE_H=0
+HAVE_REALLOCARRAY=0
+HAVE_RECALLOCARRAY=0
+HAVE_SETPROCTITLE=0
+HAVE_STRLCAT=0
+HAVE_STRLCPY=0
+HAVE_STRTONUM=0
+HAVE_TREE_H=0
+HAVE_VASPRINTF=0