build : Fix cross-compilation errors

Bundled pjproject and jansson must be configured with the host and build
parameters provided to the configure script.
Autotools do not permit to check for the existence of local header files, so
the control of hrirs.h must not be done when cross-compiling.

ASTERISK-28250

Change-Id: If0a76e52a87d4ab82b7d4c72d27d8759ca931880

configure

@@ -9278,10 +9278,10 @@ $as_echo "configuring" >&6; }
 
 	this_host=$(./config.sub $(./config.guess))
 	if test "$build" != "$this_host" ; then
-		JANSSON_CONFIGURE_OPTS+=" --build=$build"
+		JANSSON_CONFIGURE_OPTS+=" --build=$build_alias"
 	fi
 	if test "$host" != "$this_host" ; then
-		JANSSON_CONFIGURE_OPTS+=" --host=$host"
+		JANSSON_CONFIGURE_OPTS+=" --host=$host_alias"
 	fi
 
 	export TAR PATCH SED NM EXTERNALS_CACHE_DIR AST_DOWNLOAD_CACHE DOWNLOAD_TO_STDOUT DOWNLOAD_TIMEOUT DOWNLOAD MD5 CAT CUT GREP
@@ -9399,10 +9399,10 @@ $as_echo "configuring" >&6; }
 
 	this_host=$(./config.sub $(./config.guess))
 	if test "$build" != "$this_host" ; then
-		PJPROJECT_CONFIGURE_OPTS+=" --build=$build"
+		PJPROJECT_CONFIGURE_OPTS+=" --build=$build_alias"
 	fi
 	if test "$host" != "$this_host" ; then
-		PJPROJECT_CONFIGURE_OPTS+=" --host=$host"
+		PJPROJECT_CONFIGURE_OPTS+=" --host=$host_alias"
 	fi
 	# This was a copy of the autoconf generated code from the root ./configure.
 	# Hopefully, when you read this, the code is still the same.
@@ -34695,7 +34695,9 @@ else
 fi
 
 # conf_bridge (binaural rendering): check if HRIRs are available
-{ $as_echo "$as_me:${as_lineno-$LINENO}: checking for bridges/bridge_softmix/include/hrirs.h" >&5
+# this check does not work when cross-compiling
+if test "${cross_compiling}" = "no"; then
+    { $as_echo "$as_me:${as_lineno-$LINENO}: checking for bridges/bridge_softmix/include/hrirs.h" >&5
 $as_echo_n "checking for bridges/bridge_softmix/include/hrirs.h... " >&6; }
 if ${ac_cv_file_bridges_bridge_softmix_include_hrirs_h+:} false; then :
   $as_echo_n "(cached) " >&6
@@ -34718,6 +34720,7 @@ _ACEOF
 
 fi
 
+fi
 
 ac_config_files="$ac_config_files build_tools/menuselect-deps makeopts"
 

configure.ac

@@ -2815,7 +2815,10 @@ else
 fi
 
 # conf_bridge (binaural rendering): check if HRIRs are available
-AC_CHECK_FILES([bridges/bridge_softmix/include/hrirs.h])
+# this check does not work when cross-compiling
+if test "${cross_compiling}" = "no"; then
+    AC_CHECK_FILES([bridges/bridge_softmix/include/hrirs.h])
+fi
 
 AC_CONFIG_FILES([build_tools/menuselect-deps makeopts])
 AST_CHECK_MANDATORY

third-party/jansson/configure.m4

@@ -49,10 +49,10 @@ AC_DEFUN([_JANSSON_CONFIGURE],
 	AC_ARG_VAR([JANSSON_CONFIGURE_OPTS],[Additional configure options to pass to bundled jansson])
 	this_host=$(./config.sub $(./config.guess))
 	if test "$build" != "$this_host" ; then
-		JANSSON_CONFIGURE_OPTS+=" --build=$build"
+		JANSSON_CONFIGURE_OPTS+=" --build=$build_alias"
 	fi
 	if test "$host" != "$this_host" ; then
-		JANSSON_CONFIGURE_OPTS+=" --host=$host"
+		JANSSON_CONFIGURE_OPTS+=" --host=$host_alias"
 	fi
 
 	export TAR PATCH SED NM EXTERNALS_CACHE_DIR AST_DOWNLOAD_CACHE DOWNLOAD_TO_STDOUT DOWNLOAD_TIMEOUT DOWNLOAD MD5 CAT CUT GREP

third-party/pjproject/configure.m4

@@ -49,10 +49,10 @@ AC_DEFUN([_PJPROJECT_CONFIGURE],
 	AC_ARG_VAR([PJPROJECT_CONFIGURE_OPTS],[Additional configure options to pass to bundled pjproject])
 	this_host=$(./config.sub $(./config.guess))
 	if test "$build" != "$this_host" ; then
-		PJPROJECT_CONFIGURE_OPTS+=" --build=$build"
+		PJPROJECT_CONFIGURE_OPTS+=" --build=$build_alias"
 	fi
 	if test "$host" != "$this_host" ; then
-		PJPROJECT_CONFIGURE_OPTS+=" --host=$host"
+		PJPROJECT_CONFIGURE_OPTS+=" --host=$host_alias"
 	fi
 	# This was a copy of the autoconf generated code from the root ./configure.
 	# Hopefully, when you read this, the code is still the same.