Graham McIntire
3433f631aa
Move -lnetsnmp to end of link command (after source files). In GCC/Clang, library flags must come after the object files that reference them for proper symbol resolution. This fixes 'undefined symbol: init_snmp' runtime errors on Linux.
39 lines
826 B
Makefile
39 lines
826 B
Makefile
# Makefile for building towerops_nif.so
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# Erlang NIF paths
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ERL_INCLUDE_PATH ?= $(shell erl -eval 'io:format("~s", [lists:concat([code:root_dir(), "/erts-", erlang:system_info(version), "/include"])])' -s init stop -noshell)
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# Detect OS
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UNAME_S := $(shell uname -s)
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# Compiler flags
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CFLAGS = -O3 -std=c99 -fPIC -Wall -Wextra -Wno-unused-parameter
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CFLAGS += -I$(ERL_INCLUDE_PATH)
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# Libraries (must come after source files in link command)
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LIBS = -lnetsnmp
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ifeq ($(UNAME_S),Darwin)
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# macOS specific flags
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CFLAGS += -dynamiclib -undefined dynamic_lookup
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else
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# Linux flags
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CFLAGS += -shared
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endif
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# Target
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TARGET = ../priv/towerops_nif.so
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# Source files
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SRC = towerops_nif.c
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all: $(TARGET)
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$(TARGET): $(SRC)
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@mkdir -p ../priv
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$(CC) $(CFLAGS) -o $@ $< $(LIBS)
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clean:
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rm -f $(TARGET)
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.PHONY: all clean
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