build: use AC_CHECK_PROG() instead of AC_CHECK_FILE() for python3-config

Commit 9ed02fc793b3 ("build: check for python-config in configure")
breaks cross-compilation because AC_CHECK_FILE() only checks the host
machine. Use AC_CHECK_PROG() instead.

Cc: Joel Savitz <joelsavitz@gmail.com>
Fixes: 9ed02fc793b3 ("build: check for python-config in configure")
Signed-off-by: Bartosz Golaszewski <bgolaszewski@baylibre.com>

diff --git a/configure.ac b/configure.ac
index 066c1ade62af9c1e7fdc1295a41b89597b59ad93..62e2671e93858b5bf8a8be01f52ba7a0750cc61a 100644 (file)
--- a/configure.ac
+++ b/configure.ac
@@ -183,8 +183,11 @@ if test "x$with_bindings_python" = xtrue
 then
        AM_PATH_PYTHON([3.0], [],
                [AC_MSG_ERROR([python3 not found - needed for python bindings])])
-       AC_CHECK_FILE(["$PYTHON-config"], [],
-               [AC_MSG_ERROR([python3-config not found - needed for python bindings])])
+       AC_CHECK_PROG([has_python_config], [python3-config], [true], [false])
+       if test "x$has_python_config" = xfalse
+       then
+               AC_MSG_ERROR([python3-config not found - needed for python bindings])
+       fi
        AS_IF([test -z "$PYTHON_CPPFLAGS"],
                [AC_SUBST(PYTHON_CPPFLAGS, [`$PYTHON-config --includes`])])
        AS_IF([test -z "$PYTHON_LIBS"],