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dnl ===================================================================
dnl Licensed to the Apache Software Foundation (ASF) under one
dnl or more contributor license agreements. See the NOTICE file
dnl distributed with this work for additional information
dnl regarding copyright ownership. The ASF licenses this file
dnl to you under the Apache License, Version 2.0 (the
dnl "License"); you may not use this file except in compliance
dnl with the License. You may obtain a copy of the License at
dnl
dnl http://www.apache.org/licenses/LICENSE-2.0
dnl
dnl Unless required by applicable law or agreed to in writing,
dnl software distributed under the License is distributed on an
dnl "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
dnl KIND, either express or implied. See the License for the
dnl specific language governing permissions and limitations
dnl under the License.
dnl ===================================================================
dnl
dnl The default behaviour is to use pkg-config to look for an LZ4
dnl library and if that fails to simply try linking -llz4.
dnl
dnl The user can specify --with-lz4=PREFIX to look in PREFIX or
dnl --with-lz4=internal to use the internal copy of the LZ4 code.
AC_DEFUN(SVN_LZ4,
[
AC_ARG_WITH([lz4],
[AS_HELP_STRING([--with-lz4=PREFIX|internal],
[look for lz4 in PREFIX or use the internal code])],
[
if test "$withval" = internal; then
lz4_prefix=internal
elif test "$withval" = yes; then
lz4_prefix=std
else
lz4_prefix="$withval"
fi
],
[lz4_prefix=std])
if test "$lz4_prefix" = "no"; then
dnl The user has tried to disable LZ4
AC_MSG_ERROR([Subversion requires LZ4])
fi
if test "$lz4_prefix" = "internal"; then
AC_MSG_NOTICE([using internal lz4])
AC_DEFINE([SVN_INTERNAL_LZ4], [1],
[Define to use internal LZ4 code])
else
if test "$lz4_prefix" = "std"; then
SVN_LZ4_STD
else
SVN_LZ4_PREFIX
fi
if test "$lz4_found" != "yes"; then
AC_MSG_ERROR([Subversion requires LZ4 >= r129, or use --with-lz4=internal])
fi
fi
AC_SUBST(SVN_LZ4_INCLUDES)
AC_SUBST(SVN_LZ4_LIBS)
])
dnl LZ4 changed versioning schemes after r131, the next version being 1.7.3, so
dnl we need to check for both schemes. We can't use "--atleast-version=1.7.3"
dnl because that will result in a >= 1 check for the older versioning scheme.
dnl Instead, fallback to --max-version=3 if the old scheme fails. This gives a
dnl little room for major version changes, but won't falsely identify old
dnl versions as supported.
AC_DEFUN(SVN_LZ4_STD,
[
if test -n "$PKG_CONFIG"; then
AC_MSG_CHECKING([for lz4 library via pkg-config])
if $PKG_CONFIG liblz4 --atleast-version=129 || $PKG_CONFIG liblz4 --max-version=3; then
AC_MSG_RESULT([yes])
lz4_found=yes
SVN_LZ4_INCLUDES=`$PKG_CONFIG liblz4 --cflags`
SVN_LZ4_LIBS=`$PKG_CONFIG liblz4 --libs`
SVN_LZ4_LIBS="`SVN_REMOVE_STANDARD_LIB_DIRS($SVN_LZ4_LIBS)`"
else
AC_MSG_RESULT([no])
fi
fi
if test "$lz4_found" != "yes"; then
AC_MSG_NOTICE([lz4 configuration without pkg-config])
AC_CHECK_LIB(lz4, LZ4_compress_default, [
lz4_found=yes
SVN_LZ4_LIBS="-llz4"
])
fi
])
AC_DEFUN(SVN_LZ4_PREFIX,
[
AC_MSG_NOTICE([lz4 configuration via prefix])
save_cppflags="$CPPFLAGS"
CPPFLAGS="$CPPFLAGS -I$lz4_prefix/include"
save_ldflags="$LDFLAGS"
LDFLAGS="$LDFLAGS -L$lz4_prefix/lib"
AC_CHECK_LIB(lz4, LZ4_compress_default, [
lz4_found=yes
SVN_LZ4_INCLUDES="-I$lz4_prefix/include"
SVN_LZ4_LIBS="`SVN_REMOVE_STANDARD_LIB_DIRS(-L$lz4_prefix/lib)` -llz4"
])
LDFLAGS="$save_ldflags"
CPPFLAGS="$save_cppflags"
])
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