Merge branch 'ds/build-homebrew-gettext-fix' into jch

Recent update to Homebrew used by macOS folks breaks build by
moving gettext library and necessary headers.

* ds/build-homebrew-gettext-fix:
  macos: do let the build find the gettext headers/libraries/msgfmt

config.mak.uname

@@ -133,8 +133,11 @@ ifeq ($(uname_S),Darwin)
 	HAVE_BSD_SYSCTL = YesPlease
 	FREAD_READS_DIRECTORIES = UnfortunatelyYes
 	HAVE_NS_GET_EXECUTABLE_PATH = YesPlease
-	BASIC_CFLAGS += -I/usr/local/include
-	BASIC_LDFLAGS += -L/usr/local/lib
+	BASIC_CFLAGS += -I/usr/local/include -I/usr/local/opt/gettext/include
+	BASIC_LDFLAGS += -L/usr/local/lib -L/usr/local/opt/gettext/lib
+	ifeq ($(shell test -x /usr/local/opt/gettext/bin/msgfmt && echo y),y)
+		MSGFMT = /usr/local/opt/gettext/bin/msgfmt
+	endif
 endif
 ifeq ($(uname_S),SunOS)
 	NEEDS_SOCKET = YesPlease