OS ?= $(shell uname)

LUA_SHLIBS ?= $(shell pkg-config --silence-errors --libs lua5.1)
LUA_LIBS ?= $(if $(LUA_SHLIBS),$(LUA_SHLIBS),$(firstword $(wildcard /usr/lib/liblua.a /usr/local/lib/liblua.a /opt/local/lib/liblua.a)))
LUA_CFLAGS ?= $(shell pkg-config --silence-errors --cflags lua5.1)

CC ?= gcc
AR ?= ar
RANLIB ?= ranlib
CFLAGS ?= -O2
FPIC ?= -fPIC
EXTRA_CFLAGS ?= --std=gnu99
WFLAGS ?= -Wall -Werror -pedantic
CPPFLAGS ?=
COMPILE ?= $(CC) $(CPPFLAGS) $(CFLAGS) $(EXTRA_CFLAGS) $(WFLAGS)
ifeq ($(OS),Darwin)
  SHLIB_FLAGS ?= -bundle -undefined dynamic_lookup
else
  SHLIB_FLAGS ?= -shared
endif
LINK ?= $(CC)