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dnl invoking this makes lmdb a requirement
AC_DEFUN([PDNS_CHECK_LMDB], [
AC_MSG_CHECKING([where to find the lmdb library and headers])
AC_ARG_WITH([lmdb],
AC_HELP_STRING([--with-lmdb], [lmdb library to use @<:@default=auto@:>@]),[
with_lmdb=$withval
],[
with_lmdb=auto
])
AC_MSG_RESULT([$with_lmdb])
AS_IF([test "$with_lmdb" != "no"], [
AS_IF([test "x$with_lmdb" = "xyes" -o "x$with_lmdb" = "xauto"], [
PKG_CHECK_MODULES([LMDB], [lmdb], [
AC_DEFINE([HAVE_LMDB], [1], [Define to 1 if you have LMDB])
[HAVE_LMDB=1]
], [ : ]
)
], [
save_CPPFLAGS=$CPPFLAGS
save_LIBS=$LIBS
AS_IF([test -d "$with_lmdb/include"], [
LMDB_CFLAGS="-I$with_lmdb/include"
LMDB_LIBS="-L$with_lmdb/lib"
],[
LMDB_CFLAGS="-I$with_lmdb"
LMDB_LIBS="-L$with_lmdb"
])
CPPFLAGS="$LMDB_CFLAGS"
LIBS="$LMDB_LIBS"
AC_SEARCH_LIBS([mdb_env_open], [lmdb], [
AC_CHECK_HEADERS([lmdb.h], [
dnl ac_cv_search_mdb_env_open contains '-llmdb'
LMDB_LIBS="$LMDB_LIBS $ac_cv_search_mdb_env_open"
AC_DEFINE([HAVE_LMDB], [1], [Define to 1 if you have LMDB])
[HAVE_LMDB=1]
], [
AC_MSG_ERROR([lmdb headers not found in $with_lmdb])
])
CPPFLAGS="$save_CPPFLAGS"
LIBS="$save_LIBS"
AC_SUBST([LMDB_CFLAGS])
AC_SUBST([LMDB_LIBS])
])
])
])
AM_CONDITIONAL([HAVE_LMDB], [test "x$LMDB_LIBS" != "x"])
])
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