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# SYNOPSIS
#
# AX_CHECK_SRP([action-if-found[, action-if-not-found]])
#
# DESCRIPTION
#
# Look for libsrp in a number of default locations, or in a provided location
# (via --with-srp=). Sets
# SRP_CFLAGS
# SRP_LDFLAGS
# SRP_LIBS
#
# and calls ACTION-IF-FOUND or ACTION-IF-NOT-FOUND appropriately
#
# LICENSE
#
# Copyright (c) 2021 Eivind Naess <eivnaes@yahoo.com>
#
# 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 1
AC_DEFUN([AX_CHECK_SRP], [
AC_ARG_WITH([srp],
[AS_HELP_STRING([--with-srp=DIR],
[With libsrp support, see http://srp.stanford.edu])],
[
case "$withval" in
"" | y | ye | yes)
srpdirs="/usr/local /usr/lib /usr"
;;
n | no)
with_srp="no"
;;
*)
srpdirs="$withval"
;;
esac
])
if [ test "x${with_srp}" != "xno" ] ; then
SRP_LIBS="-lsrp"
for srpdir in $srpdirs; do
AC_MSG_CHECKING([for srp.h in $srpdir])
if test -f "$srpdir/include/srp.h"; then
SRP_CFLAGS="-I$srpdir/include"
SRP_LDFLAGS="-L$srpdir/lib"
AC_MSG_RESULT([yes])
break
else
AC_MSG_RESULT([no])
fi
done
# try the preprocessor and linker with our new flags,
# being careful not to pollute the global LIBS, LDFLAGS, and CPPFLAGS
AC_MSG_CHECKING([if compiling and linking against libsrp works])
save_LIBS="$LIBS"
save_LDFLAGS="$LDFLAGS"
save_CPPFLAGS="$CPPFLAGS"
LDFLAGS="$SRP_LDFLAGS $OPENSSL_LDFLAGS $LDFLAGS"
LIBS="$SRP_LIBS $OPENSSL_LIBS $LIBS"
CPPFLAGS="$SRP_CFLAGS $OPENSSL_INCLUDES $CPPFLAGS"
AC_LINK_IFELSE(
[AC_LANG_PROGRAM(
[#include <srp.h>
#include <stddef.h>],
[SRP_use_engine(NULL);])],
[
AC_MSG_RESULT([yes])
with_srp=yes
$1
], [
AC_MSG_RESULT([no])
with_srp="no"
$2
])
CPPFLAGS="$save_CPPFLAGS"
LDFLAGS="$save_LDFLAGS"
LIBS="$save_LIBS"
AC_SUBST([SRP_CFLAGS])
AC_SUBST([SRP_LIBS])
AC_SUBST([SRP_LDFLAGS])
fi
AM_CONDITIONAL(WITH_SRP, test "x${with_srp}" != "xno")
])
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