poco: fix sh4a fenv build failure

Disable FP environment on sh4a. Fixes
http://autobuild.buildroot.net/results/8dc9bca5969d455cc30206fc1ae6e1d3ba6eb6ca/.

Signed-off-by: Baruch Siach <baruch@tkos.co.il>
Signed-off-by: Peter Korsgaard <peter@korsgaard.com>

package/poco/poco.mk

@@ -34,6 +34,11 @@ ifeq ($(LIBC),uclibc)
 POCO_CONF_OPT += --no-fpenvironment --no-wstring
 endif
 
+# sh4a is missing FE_DOWNWARD and FE_UPWARD in its fenv.h
+ifeq ($(BR2_sh4a),y)
+POCO_CONF_OPT += --no-fpenvironment
+endif
+
 define POCO_CONFIGURE_CMDS
 	(cd $(@D); ./configure \
 		--config=Linux-CrossEnv	\