CFLAGS += -std=c99 -D_BSD_SOURCE
CPPFLAGS +=  -D_GNU_SOURCE

ifeq ($(origin PKG_CONFIG), undefined)
  PKG_CONFIG = pkg-config
  ifeq ($(shell which $(PKG_CONFIG) 2>/dev/null),)
    $(error $(PKG_CONFIG) not found)
  endif
endif

ifeq ($(origin LIBNL_CFLAGS) $(origin LIBNL_LDLIBS), undefined undefined)
  LIBNL_NAME ?= libnl-tiny
  ifeq ($(shell $(PKG_CONFIG) --modversion $(LIBNL_NAME) 2>/dev/null),)
    $(error No $(LIBNL_NAME) development libraries found!)
  endif
  LIBNL_CFLAGS += $(shell $(PKG_CONFIG) --cflags $(LIBNL_NAME))
  LIBNL_LDLIBS +=  $(shell $(PKG_CONFIG) --libs $(LIBNL_NAME))
endif

CFLAGS_JSONC = $(shell pkg-config --cflags json-c)
LDFLAGS_JSONC = $(shell pkg-config --libs json-c)

all: stations

stations: stations.c
	$(CC) $(CPPFLAGS) $(CFLAGS) $(CFLAGS_JSONC) $(LDFLAGS) $(LDFLAGS_JSONC) -Wall -o $@ $^ $(LDLIBS) -liwinfo