configure.ac, Makefile.am: introduce THRIFT variable to support cross-compilation
The thrift build system currently assumes that the thrift compiler is
always available in $(top_builddir)/compiler/cpp/thrift. However, in a
cross-compilation context, this location contains the thrift compiler
built for the target... which obviously will not run on the build
machine.
In order to support such cross-compilation situation, we introduce the
THRIFT variable as a an argument for the configure script (using
AC_ARG_VAR). If not specified, it defaults to the existing value of
using compiler/cpp/thrift from the build directory, but it can be
overridden when calling ./configure.
Note that $(top_builddir) cannot be used within the configure script,
so we simply use `pwd`, which is the same as the top_builddir.
Signed-off-by: Thomas Petazzoni <thomas.petazzoni@free-electrons.com>
This closes #1336
This closes #1350
diff --git a/configure.ac b/configure.ac
index df716bd..17d4060 100755
--- a/configure.ac
+++ b/configure.ac
@@ -83,6 +83,9 @@
AC_ARG_VAR([DMD_LIBEVENT_FLAGS], [DMD flags for linking libevent (auto-detected if not set).])
AC_ARG_VAR([DMD_OPENSSL_FLAGS], [DMD flags for linking OpenSSL (auto-detected if not set).])
+AC_ARG_VAR([THRIFT], [Path to the thrift tool (needed for cross-compilation).])
+AS_IF([test "x$THRIFT" = x], [THRIFT=`pwd`/compiler/cpp/thrift])
+
AC_PROG_CC
AC_PROG_CPP
AC_PROG_CXX