Merge pull request #8608 from smlng/pkg/gecko/fix

pkg: fix compile errors in gecko_sdk and umorse

pkg/gecko_sdk/Makefile

@@ -7,6 +7,8 @@ ifneq ($(CPU),efm32)
   $(error This package can only be used with EFM32 CPUs)
 endif
 
+CFLAGS += -Wno-int-in-bool-context
+
 .PHONY: all
 
 all: git-download

pkg/umorse/Makefile

@@ -3,6 +3,8 @@ PKG_URL=https://github.com/smlng/uMorse
 PKG_VERSION=1dc14abdba22cca2f7efc053b2bce327bc7db97e
 PKG_LICENSE=MIT
 
+CFLAGS += -D_XOPEN_SOURCE=600
+
 .PHONY: all
 
 all: git-download