makefile autotools
Posted yhbb
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autotools使用步骤（用autotools制作makefile） (betheme.net)
makefile详解 - 一叶飘落尽知秋 - 博客园 (cnblogs.com)
直接make文件名就自动帮你编译了
运行
vim makefile创建一个
控制台make就生成了
windwos中引入库不需要其他什么，linux就需要了
这样才能编译成功
写一个头文件和cpp文件
first_make:first_make.cpp
g++ first_make.cpp to.cpp -o firstmake -lpthread -std=c++11
这样写就成功了
命令前面加@ 这个命令就不会显示
定义变量不需要@，使用才需要
命令前面加 - 执行失败下面的命令也会执行
自动推导
这里写错了直接把cpp文件删了
使用 autotools 生成未定义的参考错误，而自定义 Makefile 工作正常
【中文标题】使用 autotools 生成未定义的参考错误，而自定义 Makefile 工作正常【英文标题】：make using autotools gives undefined reference errors while custom Makefile works fine 【发布时间】：2017-03-08 20:03:01 【问题描述】：我正在尝试将 ccextractor（开源隐藏式字幕提取器）的构建机制从自定义 Makefile 转换为 Autotools 生成的 Makefile。
当前的 Makefile 如下所示：
SHELL = /bin/sh
CC = gcc
SYS := $(shell gcc -dumpmachine)
CFLAGS = -O3 -std=gnu99 -s
INCLUDE = -Isrc/gpacmp4/ -Isrc/libpng -Isrc/lib_hash -Isrc/protobuf-c -Isrc/zlib -Isrc/lib_ccx -Isrc/.
INCLUDE += -Isrc/zvbi -Isrc/utf8proc
ALL_FLAGS = -Wno-write-strings -D_FILE_OFFSET_BITS=64 -DVERSION_FILE_PRESENT
LDFLAGS = -lm
ifneq (, $(findstring linux, $(SYS)))
CFLAGS +=-DGPAC_CONFIG_LINUX
endif
TARGET = ccextractor
OBJS_DIR = objs
VPATH = src:src/gpacmp4:src/libpng:src/zlib:src/lib_ccx:src/zvbi:src/lib_hash:src/utf8proc:src/protobuf-c
SRCS_DIR = src
SRCS_C = $(wildcard $(SRCS_DIR)/*.c)
OBJS = $(SRCS_C:$(SRCS_DIR)/%.c=$(OBJS_DIR)/%.o)
SRCS_CCX_DIR = $(SRCS_DIR)/lib_ccx
SRCS_CCX = $(wildcard $(SRCS_CCX_DIR)/*.c)
OBJS_CCX = $(SRCS_CCX:$(SRCS_CCX_DIR)/%.c=$(OBJS_DIR)/%.o)
SRCS_PNG_DIR = $(SRCS_DIR)/libpng
SRCS_PNG = $(wildcard $(SRCS_PNG_DIR)/*.c)
OBJS_PNG = $(SRCS_PNG:$(SRCS_PNG_DIR)/%.c=$(OBJS_DIR)/%.o)
SRCS_ZVBI_DIR = $(SRCS_DIR)/zvbi
SRCS_ZVBI = $(wildcard $(SRCS_ZVBI_DIR)/*.c)
OBJS_ZVBI = $(SRCS_ZVBI:$(SRCS_ZVBI_DIR)/%.c=$(OBJS_DIR)/%.o)
SRCS_GPACMP4_DIR = $(SRCS_DIR)/gpacmp4
SRCS_GPACMP4_C = $(wildcard $(SRCS_GPACMP4_DIR)/*.c)
SRCS_GPACMP4_CPP = $(wildcard $(SRCS_GPACMP4_DIR)/*.cpp)
OBJS_GPACMP4 = $(SRCS_GPACMP4_C:$(SRCS_GPACMP4_DIR)/%.c=$(OBJS_DIR)/%.o) \
$(SRCS_GPACMP4_CPP:$(SRCS_GPACMP4_DIR)/%.cpp=$(OBJS_DIR)/%.o)
SRCS_ZLIB_DIR = $(SRCS_DIR)/zlib
SRCS_ZLIB = $(wildcard $(SRCS_ZLIB_DIR)/*.c)
OBJS_ZLIB = $(SRCS_ZLIB:$(SRCS_ZLIB_DIR)/%.c=$(OBJS_DIR)/%.o)
SRCS_HASH_DIR = $(SRCS_DIR)/lib_hash
SRCS_HASH = $(wildcard $(SRCS_HASH_DIR)/*.c)
OBJS_HASH = $(SRCS_HASH:$(SRCS_HASH_DIR)/%.c=$(OBJS_DIR)/%.o)
SRCS_UTF8_DIR = $(SRCS_DIR)/utf8proc
SRCS_UTF8 = $(SRCS_UTF8_DIR)/utf8proc.c
OBJS_UTF8 = $(SRCS_UTF8:$(SRCS_UTF8_DIR)/%.c=$(OBJS_DIR)/%.o)
INSTLALL = cp -f -p
INSTLALL_PROGRAM = $(INSTLALL)
DESTDIR = /usr/bin
ifeq ($(ENABLE_HARDSUBX),yes)
ENABLE_OCR=yes
CFLAGS+=-DENABLE_HARDSUBX
CFLAGS+= $(shell pkg-config --cflags libavcodec)
CFLAGS+= $(shell pkg-config --cflags libavformat)
CFLAGS+= $(shell pkg-config --cflags libavutil)
CFLAGS+= $(shell pkg-config --cflags libswscale)
AV_LDFLAGS+= $(shell pkg-config --libs libavcodec )
AV_LDFLAGS+= $(shell pkg-config --libs libavformat )
AV_LDFLAGS+= $(shell pkg-config --libs libavutil )
AV_LDFLAGS+= $(shell pkg-config --libs libswscale )
ifeq ($(AV_LDFLAGS),$(EMPTY))
$(error **ERROR** "libav not found")
else
$(info "libav found")
endif
LDFLAGS+= $(AV_LDFLAGS)
endif
ifeq ($(ENABLE_OCR),yes)
CFLAGS+=-DENABLE_OCR -DPNG_NO_CONFIG_H
LEPT_LDFLAGS+= $(shell pkg-config --libs lept)
ifneq ($(shell pkg-config --exists tesseract), $(EMPTY))
TESS_LDFLAGS+= $(shell pkg-config --libs tesseract)
TESS_CFLAGS+= $(shell pkg-config --cflags tesseract)
else
#fix for raspberry pi not having a pkgconfig file for tesseract
ifneq ($(wildcard /usr/include/tesseract/*),$(EMPTY))
TESS_LDFLAGS+= -ltesseract
TESS_CFLAGS+= -I/usr/include/tesseract
endif
endif
#error checking of library are there or not
ifeq ($(TESS_LDFLAGS),$(EMPTY))
$(error **ERROR** "tesseract not found")
else
#TODO print the version of library found
$(info "tesseract found")
endif
ifeq ($(LEPT_LDFLAGS),$(EMPTY))
$(error **ERROR** "leptonica not found")
else
#TODO print the version of library found
$(info "Leptonica found")
endif
CFLAGS += $(TESS_CFLAGS)
CFLAGS += $(shell pkg-config --cflags lept)
LDFLAGS += $(TESS_LDFLAGS)
LDFLAGS += $(LEPT_LDFLAGS)
endif
ifeq ($(ENABLE_FFMPEG),yes)
CFLAGS+=-DENABLE_FFMPEG
CFLAGS+= $(shell pkg-config --cflags libavcodec)
CFLAGS+= $(shell pkg-config --cflags libavformat)
CFLAGS+= $(shell pkg-config --cflags libavutil)
LDFLAGS+= $(shell pkg-config --libs libavcodec )
LDFLAGS+= $(shell pkg-config --libs libavformat )
LDFLAGS+= $(shell pkg-config --libs libavutil )
endif
.PHONY: all
all: pre-build objs_dir $(TARGET)
.PHONY: objs_dir
objs_dir:
mkdir -p $(OBJS_DIR)
$(TARGET): $(OBJS) $(OBJS_PNG) $(OBJS_GPACMP4) $(OBJS_ZVBI) $(OBJS_ZLIB) $(OBJS_HASH) $(OBJS_CCX) $(OBJS_UTF8)
$(CC) $(ALL_FLAGS) $(CFLAGS) $(OBJS) $(OBJS_CCX) $(OBJS_PNG) $(OBJS_ZVBI) $(OBJS_GPACMP4) $(OBJS_ZLIB) $(OBJS_HASH) $(OBJS_UTF8) $(LDFLAGS) -o $@
$(OBJS_DIR)/%.o: %.c
$(CC) -c $(ALL_FLAGS) $(INCLUDE) $(CFLAGS) $< -o $@
$(OBJS_DIR)/%.o: %.cpp
$(CC) -c $(ALL_FLAGS) $(INCLUDE) $(CFLAGS) $< -o $@ -Isrc/gpacmp4
$(OBJS_DIR)/ccextractor.o: ccextractor.c
$(CC) -c $(ALL_FLAGS) $(INCLUDE) $(CFLAGS) -O0 $< -o $@
.PHONY: clean
clean:
rm -rf $(TARGET) 2>/dev/null || true
rm -rf $(OBJS_CCX) $(OBJS_PNG) $(OBJS_ZLIB) $(OBJS_GPACMP4) $(OBJS_HASH) $(OBJS_UTF8) $(OBJS) 2>/dev/null || true
rm -rdf $(OBJS_DIR) 2>/dev/null || true
rm -rf .depend 2>/dev/null || true
.PHONY: install
install: $(TARGET)
$(INSTLALL_PROGRAM) $(TARGET) $(DESTDIR)
.PHONY: uninstall
uninstall:
rm -iv $(DESTDIR)/$(TARGET)
.PHONY: depend dep
depend dep:
$(CC) $(CFLAGS) $(INCLUDE) -E -MM $(SRCS_C) $(SRCS_PNG) $(SRCS_ZVBI) $(SRCS_ZLIB) $(SRCS_HASH) $(SRCS_UTF8) $(SRCS_CCX) \
$(SRCS_GPACMP4_C) $(SRCS_GPACMP4_CPP) |\
sed 's/^[a-zA-Z_0-9]*.o/$(OBJS_DIR)\/&/' > .depend
.PHONY: pre-build
pre-build:
./pre-build.sh
-include .depend
通过上面的 Makefile 构建工作正常。我的 Makefile.am 看起来像这样：
bin_PROGRAMS = ccextractor
ccextractor_SOURCES = \
**Removing common content of Makefile.am as below due to maximum character limit**
AM_CPPFLAGS = -I src -I /usr/include/leptonica/ -I /usr/include/tesseract/ -I src/lib_ccx/ -I src/gpacmp4/ -I src/libpng/ -I src/zlib/ -I src/zvbi/ -I src/lib_hash/ -I src/protobuf-c/ -I src/utf8proc/
AM_CFLAGS = -std=gnu99 -Wno-write-strings -DGPAC_CONFIG_LINUX -D_FILE_OFFSET_BITS=64 -DVERSION_FILE_PRESENT -DENABLE_OCR
AM_LDFLAGS = -lm -lz -ltesseract -llept
如果我在上述文件的autoreconf -i 之后运行make，则构建失败并出现错误：
/usr/bin/ld: src/gpacmp4/av_parsers.o: undefined reference to symbol 'trunc@@GLIBC_2.2.5'
/lib/x86_64-linux-gnu/libm.so.6: error adding symbols: DSO missing from command line
如果我以./configure LIBS="-lm -lz" 运行./configure，则构建失败并出现以下错误：
/media/mayank/Mayank/GSOC 2017/Projects/ccextractor/src/gpacmp4/drm_sample.c:1358: undefined reference to `gf_isom_get_track_from_file'
src/gpacmp4/drm_sample.o: In function `gf_isom_get_adobe_protection_info':
/media/mayank/Mayank/GSOC 2017/Projects/ccextractor/src/gpacmp4/drm_sample.c:1378: undefined reference to `gf_isom_get_track_from_file'
/media/mayank/Mayank/GSOC 2017/Projects/ccextractor/src/gpacmp4/drm_sample.c:1387: undefined reference to `IsMP4Description'
src/gpacmp4/drm_sample.o: In function `gf_isom_cenc_is_pattern_mode':
/media/mayank/Mayank/GSOC 2017/Projects/ccextractor/src/gpacmp4/drm_sample.c:1401: undefined reference to `gf_isom_get_track_from_file'
src/gpacmp4/drm_sample.o: In function `gf_isom_ipmpx_remove_tool_list':
/media/mayank/Mayank/GSOC 2017/Projects/ccextractor/src/gpacmp4/drm_sample.c:1421: undefined reference to `gf_odf_desc_del'
collect2: error: ld returned 1 exit status
tree 在src 目录是：
.
├── ccextractor.c
├── CCExtractorConfig.h.in
├── ccextractor.o
├── CMakeLists.txt
├── gpacmp4
│ ├── avc_ext.c
│ ├── avc_ext.o
│ ├── avilib.c
│ ├── avilib.o
│ ├── av_parsers.c
│ ├── drm_sample.o
│ ├── error.c
│ ├── error.o
│ ├── gpac
│ │ ├── avparse.h
│ │ ├── base_coding.h
│ │ ├── bitstream.h
│ │ ├── config_file.h
│ │ ├── configuration.h
│ │ ├── constants.h
│ │ ├── events_constants.h
│ │ ├── ietf.h
│ │ ├── internal
│ │ │ ├── avilib.h
│ │ │ ├── isomedia_dev.h
│ │ │ ├── media_dev.h
│ │ │ ├── odf_dev.h
│ │ │ ├── odf_parse_common.h
│ │ │ └── ogg.h
│ │ ├── isomedia.h
│ │ ├── list.h
│ │ ├── math.h
│ │ ├── media_tools.h
│ │ ├── mpeg4_odf.h
│ │ ├── network.h
│ │ ├── revision.h
│ │ ├── setup.h
│ │ ├── sync_layer.h
│ │ ├── tools.h
│ │ ├── utf.h
│ │ └── version.h
│ ├── gpac_ogg.c
│ ├── hinting.c
│ ├── ipmpx_code.c
│ ├── ipmpx_parse.c
│ ├── isom_intern.c
│ ├── isom_read.c
│ ├── isom_store.c
│ ├── isom_write.c
│ ├── list.c
│ ├── math.c
│ ├── media.c
│ ├── media_odf.c
│ ├── meta.c
│ ├── movie_fragments.c
│ ├── mp4.c
│ ├── odf_code.c
│ ├── odf_codec.c
│ ├── odf_command.c
│ ├── os_config_init.c
│ ├── os_divers.c
│ ├── os_file.c
│ ├── qos.c
│ ├── ReadMe.txt
│ ├── sample_descs.c
│ ├── slc.c
│ ├── stbl_read.c
│ ├── stbl_write.c
│ ├── track.c
│ ├── tx3g.c
│ ├── url.c
│ └── utf.c
├── lib_ccx
│ ├── activity.c
│ ├── activity.h
│ ├── asf_constants.h
│ ├── asf_functions.c
│ ├── avc_functions.c
│ ├── avc_functions.h
│ ├── bitstream.h
│ ├── cc_bitstream.c
│ ├── ccfont2.xbm
│ ├── ccx_common_char_encoding.c
│ ├── ccx_common_char_encoding.h
│ ├── ccx_decoders_708.h
│ ├── ccx_decoders_708_output.c
│ ├── ccx_encoders_xds.h
│ ├── ccx_gxf.c
│ ├── ccx_gxf.h
│ ├── ccx_mp4.h
│ ├── dvd_subtitle_decoder.c
│ ├── utility.h
│ ├── wtv_constants.h
│ └── wtv_functions.c
├── lib_hash
│ ├── README
│ ├── sha2.c
│ └── sha2.h
├── libpng
│ ├── png.c
│ ├── pngconf.h
│ ├── pngdebug.h
│ ├── pngerror.c
│ ├── pngget.c
| |
├── protobuf-c
│ ├── protobuf-c.c
│ └── protobuf-c.h
├── utf8proc
│ ├── utf8proc.c
│ ├── utf8proc_data.c
│ └── utf8proc.h
├── win_iconv
│ ├── iconv.h
│ └── win_iconv.c
├── win_spec_incld
│ ├── dirent.h
│ ├── inttypes.h
│ └── stdint.h
├── zlib
│ ├── adler32.c
│ ├── compress.c
│ ├── crc32.c
│ ├── crc32.h
│ ├── deflate.c
│ ├── deflate.h
│ ├── gzclose.c
│ ├── gzguts.h
│ ├── zutil.c
│ └── zutil.h
└── zvbi
├── bcd.h
├── bit_slicer.c
├── bit_slicer.h
├── decoder.c
├── macros.h
├── misc.h
├── raw_decoder.c
├── raw_decoder.h
├── sampling_par.c
├── sampling_par.h
├── sliced.h
└── zvbi_decoder.h
**Stripped some filenames (not directory) due to max character limit**
此外，所有包含都使用src 的子目录中的完整路径完成，例如gpacmp4 目录#include <gpac/avparse.h> 中的文件。除了主要的ccextractor.c 文件之外的所有文件，为此提供了所有-I flags。
参考 ccextractor 原代码： https://github.com/CCExtractor/ccextractor
原始的Makefile 将在linux 目录中。
PS：目前我正在尝试构建 ccextractor，所有检查将在稍后介绍。对于简化机制ccextractor/linux/build 有参考价值。
即使是最轻微的帮助也会受到赞赏。
更新：（由@MadScientist 提供）
我将Makefile.am 更新为：
AUTOMAKE_OPTIONS = foreign
bin_PROGRAMS = ccextractor
ccextractor_SOURCES = \
src/ccextractor.c \
src/gpacmp4/avc_ext.c \
src/gpacmp4/avilib.c \
src/gpacmp4/av_parsers.c \
src/gpacmp4/base_encoding.c \
src/gpacmp4/bitstream.c \
src/gpacmp4/box_code_3gpp.c \
src/gpacmp4/box_code_adobe.c \
src/gpacmp4/box_code_apple.c \
src/gpacmp4/box_code_base.c \
src/gpacmp4/box_code_drm.c \
src/gpacmp4/box_code_meta.c \
src/gpacmp4/box_funcs.c \
src/gpacmp4/configfile.c \
src/gpacmp4/data_map.c \
src/gpacmp4/desc_private.c \
src/gpacmp4/descriptors.c \
src/gpacmp4/drm_sample.c \
src/gpacmp4/error.c \
src/gpacmp4/gpac/avparse.h \
src/gpacmp4/gpac/base_coding.h \
src/gpacmp4/gpac/bitstream.h \
src/gpacmp4/gpac/config_file.h \
src/gpacmp4/gpac/configuration.h \
src/gpacmp4/gpac/constants.h \
src/gpacmp4/gpac/events_constants.h \
src/gpacmp4/gpac/ietf.h \
src/gpacmp4/gpac/internal
src/gpacmp4/gpac/internal/avilib.h \
src/gpacmp4/gpac/internal/isomedia_dev.h \
src/gpacmp4/gpac/internal/media_dev.h \
src/gpacmp4/gpac/internal/odf_dev.h \
src/gpacmp4/gpac/internal/odf_parse_common.h \
src/gpacmp4/gpac/internal/ogg.h \
src/gpacmp4/gpac/isomedia.h \
src/gpacmp4/gpac/list.h \
src/gpacmp4/gpac/math.h \
src/gpacmp4/gpac/media_tools.h \
src/gpacmp4/gpac/mpeg4_odf.h \
src/gpacmp4/gpac/network.h \
src/gpacmp4/gpac/revision.h \
src/gpacmp4/gpac/setup.h \
src/gpacmp4/gpac/sync_layer.h \
src/gpacmp4/gpac/tools.h \
src/gpacmp4/gpac/utf.h \
src/gpacmp4/gpac/version.h \
src/gpacmp4/gpac_ogg.c \
src/gpacmp4/hinting.c \
src/gpacmp4/ipmpx_code.c \
src/gpacmp4/ipmpx_parse.c \
src/gpacmp4/isom_intern.c \
src/gpacmp4/isom_read.c \
src/gpacmp4/isom_store.c \
src/gpacmp4/isom_write.c \
src/gpacmp4/list.c \
src/gpacmp4/math.c \
src/gpacmp4/media.c \
src/gpacmp4/media_odf.c \
src/gpacmp4/meta.c \
src/gpacmp4/movie_fragments.c \
src/gpacmp4/mp4.c \
src/gpacmp4/odf_code.c \
src/gpacmp4/odf_codec.c \
src/gpacmp4/odf_command.c \
src/gpacmp4/os_config_init.c \
src/gpacmp4/os_divers.c \
src/gpacmp4/os_file.c \
src/gpacmp4/qos.c \
src/gpacmp4/ReadMe.txt
src/gpacmp4/sample_descs.c \
src/gpacmp4/slc.c \
src/gpacmp4/stbl_read.c \
src/gpacmp4/stbl_write.c \
src/gpacmp4/track.c \
src/gpacmp4/tx3g.c \
src/gpacmp4/url.c \
src/gpacmp4/utf.c \
src/lib_ccx/activity.c \
src/lib_ccx/activity.h \
src/lib_ccx/asf_constants.h \
src/lib_ccx/asf_functions.c \
src/lib_ccx/avc_functions.c \
src/lib_ccx/avc_functions.h \
src/lib_ccx/bitstream.h \
src/lib_ccx/cc_bitstream.c \
src/lib_ccx/ccx_common_char_encoding.c \
src/lib_ccx/ccx_common_char_encoding.h \
src/lib_ccx/ccx_common_common.c \
src/lib_ccx/ccx_common_common.h \
src/lib_ccx/ccx_common_constants.c \
src/lib_ccx/ccx_common_constants.h \
src/lib_ccx/ccx_common_option.c \
src/lib_ccx/ccx_common_option.h \
src/lib_ccx/ccx_common_platform.h \
src/lib_ccx/ccx_common_structs.h \
src/lib_ccx/ccx_common_timing.c \
src/lib_ccx/ccx_common_timing.h \
src/lib_ccx/ccx_decoders_608.c \
src/lib_ccx/ccx_decoders_608.h \
src/lib_ccx/ccx_decoders_708.c \
src/lib_ccx/ccx_decoders_708_encoding.c \
src/lib_ccx/ccx_decoders_708_encoding.h \
src/lib_ccx/ccx_decoders_708.h \
src/lib_ccx/ccx_decoders_708_output.c \
src/lib_ccx/ccx_decoders_708_output.h \
src/lib_ccx/ccx_decoders_common.c \
src/lib_ccx/ccx_decoders_common.h \
src/lib_ccx/ccx_decoders_isdb.c \
src/lib_ccx/ccx_decoders_isdb.h \
src/lib_ccx/ccx_decoders_structs.h \
src/lib_ccx/ccx_decoders_vbi.c \
src/lib_ccx/ccx_decoders_vbi.h \
src/lib_ccx/ccx_decoders_xds.c \
src/lib_ccx/ccx_decoders_xds.h \
src/lib_ccx/ccx_demuxer.c \
src/lib_ccx/ccx_demuxer.h \
src/lib_ccx/ccx_dtvcc.c \
src/lib_ccx/ccx_dtvcc.h \
src/lib_ccx/ccx_encoders_common.c \
src/lib_ccx/ccx_encoders_common.h \
src/lib_ccx/ccx_encoders_curl.c \
src/lib_ccx/ccx_encoders_g608.c \
src/lib_ccx/ccx_encoders_helpers.c \
src/lib_ccx/ccx_encoders_helpers.h \
src/lib_ccx/ccx_encoders_sami.c \
src/lib_ccx/ccx_encoders_smptett.c \
src/lib_ccx/ccx_encoders_splitbysentence.c \
src/lib_ccx/ccx_encoders_spupng.c \
src/lib_ccx/ccx_encoders_spupng.h \
src/lib_ccx/ccx_encoders_srt.c \
src/lib_ccx/ccx_encoders_ssa.c \
src/lib_ccx/ccx_encoders_structs.h \
src/lib_ccx/ccx_encoders_transcript.c \
src/lib_ccx/ccx_encoders_webvtt.c \
src/lib_ccx/ccx_encoders_xds.c \
src/lib_ccx/ccx_encoders_xds.h \
src/lib_ccx/ccx_gxf.c \
src/lib_ccx/ccx_gxf.h \
src/lib_ccx/ccx_mp4.h \
src/lib_ccx/ccx_share.c \
src/lib_ccx/ccx_share.h \
src/lib_ccx/ccx_sub_entry_message.pb-c.c \
src/lib_ccx/ccx_sub_entry_message.pb-c.h \
src/lib_ccx/CMakeLists.txt
src/lib_ccx/compile_info.h \
src/lib_ccx/compile_info_real.h \
src/lib_ccx/configuration.c \
src/lib_ccx/configuration.h \
src/lib_ccx/disable_warnings.h \
src/lib_ccx/dvb_subtitle_decoder.c \
src/lib_ccx/dvb_subtitle_decoder.h \
src/lib_ccx/dvd_subtitle_decoder.c \
src/lib_ccx/dvd_subtitle_decoder.h \
src/lib_ccx/es_functions.c \
src/lib_ccx/es_userdata.c \
src/lib_ccx/ffmpeg_intgr.c \
src/lib_ccx/ffmpeg_intgr.h \
src/lib_ccx/file_buffer.h \
src/lib_ccx/file_functions.c \
src/lib_ccx/general_loop.c \
src/lib_ccx/hamming.h \
src/lib_ccx/hardsubx.c \
src/lib_ccx/hardsubx_classifier.c \
src/lib_ccx/hardsubx_decoder.c \
src/lib_ccx/hardsubx.h \
src/lib_ccx/hardsubx_imgops.c \
src/lib_ccx/hardsubx_utility.c \
src/lib_ccx/lib_ccx.c \
src/lib_ccx/lib_ccx.h \
src/lib_ccx/list.h \
src/lib_ccx/matroska.c \
src/lib_ccx/matroska.h \
src/lib_ccx/myth.c \
src/lib_ccx/networking.c \
src/lib_ccx/networking.h \
src/lib_ccx/ocr.c \
src/lib_ccx/ocr.h \
src/lib_ccx/output.c \
src/lib_ccx/params.c \
src/lib_ccx/params_dump.c \
src/lib_ccx/sequencing.c \
src/lib_ccx/spupng_encoder.c \
src/lib_ccx/spupng_encoder.h \
src/lib_ccx/stdintmsc.h \
src/lib_ccx/stream_functions.c \
src/lib_ccx/teletext.h \
src/lib_ccx/telxcc.c \
src/lib_ccx/ts_functions.c \
src/lib_ccx/ts_functions.h \
src/lib_ccx/ts_info.c \
src/lib_ccx/ts_tables.c \
src/lib_ccx/ts_tables_epg.c \
src/lib_ccx/utility.c \
src/lib_ccx/utility.h \
src/lib_ccx/wtv_constants.h \
src/lib_ccx/wtv_functions.c \
src/lib_hash/sha2.c \
src/lib_hash/sha2.h \
src/libpng/png.c \
src/libpng/pngconf.h \
src/libpng/pngdebug.h \
src/libpng/pngerror.c \
src/libpng/pngget.c \
src/libpng/png.h \
src/libpng/pnginfo.h \
src/libpng/pnglibconf.h \
src/libpng/pngmem.c \
src/libpng/pngpread.c \
src/libpng/pngpriv.h \
src/libpng/pngread.c \
src/libpng/pngrio.c \
src/libpng/pngrtran.c \
src/libpng/pngrutil.c \
src/libpng/pngset.c \
src/libpng/pngstruct.h \
src/libpng/pngtrans.c \
src/libpng/pngwio.c \
src/libpng/pngwrite.c \
src/libpng/pngwtran.c \
src/libpng/pngwutil.c \
src/protobuf-c/protobuf-c.c \
src/protobuf-c/protobuf-c.h \
src/utf8proc/utf8proc.c \
src/utf8proc/utf8proc_data.c \
src/utf8proc/utf8proc.h \
src/win_iconv/iconv.h \
src/win_iconv/win_iconv.c \
src/win_spec_incld/dirent.h \
src/win_spec_incld/inttypes.h \
src/win_spec_incld/stdint.h \
src/zlib/adler32.c \
src/zlib/compress.c \
src/zlib/crc32.c \
src/zlib/crc32.h \
src/zlib/deflate.c \
src/zlib/deflate.h \
src/zlib/gzclose.c \
src/zlib/gzguts.h \
src/zlib/gzlib.c \
src/zlib/gzread.c \
src/zlib/gzwrite.c \
src/zlib/infback.c \
src/zlib/inffast.c \
src/zlib/inffast.h \
src/zlib/inffixed.h \
src/zlib/inflate.c \
src/zlib/inflate.h \
src/zlib/inftrees.c \
src/zlib/inftrees.h \
src/zlib/trees.c \
src/zlib/trees.h \
src/zlib/uncompr.c \
src/zlib/zconf.h \
src/zlib/zlib.h \
src/zlib/zutil.c \
src/zlib/zutil.h \
src/zvbi/bcd.h \
src/zvbi/bit_slicer.c \
src/zvbi/bit_slicer.h \
src/zvbi/decoder.c \
src/zvbi/macros.h \
src/zvbi/misc.h \
src/zvbi/raw_decoder.c \
src/zvbi/raw_decoder.h \
src/zvbi/sampling_par.c \
src/zvbi/sampling_par.h \
src/zvbi/sliced.h \
src/zvbi/zvbi_decoder.h
ccextractor_CFLAGS =-std=gnu99 -Wno-write-strings -DGPAC_CONFIG_LINUX -D_FILE_OFFSET_BITS=64 -DVERSION_FILE_PRESENT -DENABLE_OCR
ccextractor_CPPFLAGS =-I /usr/include/leptonica/ -I /usr/include/tesseract/ -I src/lib_ccx/ -I src/gpacmp4/ -I src/libpng/ -I src/zlib/ -I src/zvbi/ -I src/lib_hash/ -I src/protobuf-c/ -I src/utf8proc/
ccextractor_LDADD =-lm -ltesseract -llept
ccextractor_LDFLAGS=-zmuldefs
完美构建“ccextractor”的build脚本是：
#!/bin/bash
BLD_FLAGS="-std=gnu99 -Wno-write-strings -DGPAC_CONFIG_LINUX -D_FILE_OFFSET_BITS=64 -DVERSION_FILE_PRESENT -DENABLE_OCR"
BLD_INCLUDE="-Isrc -I /usr/include/leptonica/ -I /usr/include/tesseract/ -Isrc/lib_ccx/ -Isrc/gpacmp4/ -Isrc/libpng/ -Isrc/zlib/ -Isrc/zvbi -Isrc/lib_hash -Isrc/protobuf-c -Isrc/utf8proc"
SRC_LIBPNG="$(find src/libpng/ -name '*.c')"
SRC_ZLIB="$(find src/zlib/ -name '*.c')"
SRC_ZVBI="$(find src/zvbi/ -name '*.c')"
SRC_CCX="$(find src/lib_ccx/ -name '*.c')"
SRC_GPAC="$(find src/gpacmp4/ -name '*.c')"
SRC_HASH="$(find src/lib_hash/ -name '*.c')"
SRC_PROTOBUF="$(find src/protobuf-c/ -name '*.c')"
SRC_UTF8PROC="src/utf8proc/utf8proc.c"
BLD_SOURCES="src/ccextractor.c $SRC_CCX $SRC_GPAC $SRC_ZLIB $SRC_ZVBI $SRC_LIBPNG $SRC_HASH $SRC_PROTOBUF $SRC_UTF8PROC"
BLD_LINKER="-lm -zmuldefs -l tesseract -l lept"
**Stripped a call for a script which checks the git commit (nothing that'd interfere with build**
out=$((LC_ALL=C gcc $BLD_FLAGS $BLD_INCLUDE -o ccextractor $BLD_SOURCES $BLD_LINKER) 2>&1)
res=$?
if [[ $out == *"gcc: command not found"* ]]
then
echo "Error: please install gcc";
exit 1
fi
if [[ $out == *"curl.h: No such file or directory"* ]]
then
echo "Error: please install curl development library (libcurl4-gnutls-dev for Debian/Ubuntu)";
exit 2
fi
if [[ $out == *"capi.h: No such file or directory"* ]]
then
echo "Error: please install tesseract development library (tesseract-ocr-dev for Debian/Ubuntu)";
exit 3
fi
if [[ $out == *"allheaders.h: No such file or directory"* ]]
then
echo "Error: please install leptonica development library (libleptonica-dev for Debian/Ubuntu)";
exit 4
fi
if [[ $res -ne 0 ]] # Unknown error
then
echo "Compiled with errors"
>&2 echo "$out"
exit 5
fi
echo "Compilation successful";
以下是make 调用的一些初始语句：
gcc -DHAVE_CONFIG_H -I. -I /usr/include/leptonica/ -I /usr/include/tesseract/ -I src/lib_ccx/ -I src/gpacmp4/ -I src/libpng/ -I src/zlib/ -I src/zvbi/ -I src/lib_hash/ -I src/protobuf-c/ -I src/utf8proc/ -std=gnu99 -Wno-write-strings -DGPAC_CONFIG_LINUX -D_FILE_OFFSET_BITS=64 -DVERSION_FILE_PRESENT -DENABLE_OCR -g -O2 -MT src/ccextractor-ccextractor.o -MD -MP -MF src/.deps/ccextractor-ccextractor.Tpo -c -o src/ccextractor-ccextractor.o `test -f 'src/ccextractor.c' || echo './'`src/ccextractor.c
mv -f src/.deps/ccextractor-ccextractor.Tpo src/.deps/ccextractor-ccextractor.Po
gcc -DHAVE_CONFIG_H -I. -I /usr/include/leptonica/ -I /usr/include/tesseract/ -I src/lib_ccx/ -I src/gpacmp4/ -I src/libpng/ -I src/zlib/ -I src/zvbi/ -I src/lib_hash/ -I src/protobuf-c/ -I src/utf8proc/ -std=gnu99 -Wno-write-strings -DGPAC_CONFIG_LINUX -D_FILE_OFFSET_BITS=64 -DVERSION_FILE_PRESENT -DENABLE_OCR -g -O2 -MT src/gpacmp4/ccextractor-avc_ext.o -MD -MP -MF src/gpacmp4/.deps/ccextractor-avc_ext.Tpo -c -o src/gpacmp4/ccextractor-avc_ext.o `test -f 'src/gpacmp4/avc_ext.c' || echo './'`src/gpacmp4/avc_ext.c
mv -f src/gpacmp4/.deps/ccextractor-avc_ext.Tpo src/gpacmp4/.deps/ccextractor-avc_ext.Po
gcc -DHAVE_CONFIG_H -I. -I /usr/include/leptonica/ -I /usr/include/tesseract/ -I src/lib_ccx/ -I src/gpacmp4/ -I src/libpng/ -I src/zlib/ -I src/zvbi/ -I src/lib_hash/ -I src/protobuf-c/ -I src/utf8proc/ -std=gnu99 -Wno-write-strings -DGPAC_CONFIG_LINUX -D_FILE_OFFSET_BITS=64 -DVERSION_FILE_PRESENT -DENABLE_OCR -g -O2 -MT src/gpacmp4/ccextractor-avilib.o -MD -MP -MF src/gpacmp4/.deps/ccextractor-avilib.Tpo -c -o src/gpacmp4/ccextractor-avilib.o `test -f 'src/gpacmp4/avilib.c' || echo './'`src/gpacmp4/avilib.c
mv -f src/gpacmp4/.deps/ccextractor-avilib.Tpo src/gpacmp4/.deps/ccextractor-avilib.Po
make 在显示未定义的引用错误之前调用的语句：
gcc -std=gnu99 -Wno-write-strings -DGPAC_CONFIG_LINUX -D_FILE_OFFSET_BITS=64 -DVERSION_FILE_PRESENT -DENABLE_OCR -g -O2 -zmuldefs -o ccextractor src/ccextractor-ccextractor.o src/gpacmp4/ccextractor-avc_ext.o src/gpacmp4/ccextractor-avilib.o src/gpacmp4/ccextractor-av_parsers.o src/gpacmp4/ccextractor-base_encoding.o src/gpacmp4/ccextractor-bitstream.o src/gpacmp4/ccextractor-box_code_3gpp.o src/gpacmp4/ccextractor-box_code_adobe.o src/gpacmp4/ccextractor-box_code_apple.o src/gpacmp4/ccextractor-box_code_base.o src/gpacmp4/ccextractor-box_code_drm.o src/gpacmp4/ccextractor-box_code_meta.o src/gpacmp4/ccextractor-box_funcs.o src/gpacmp4/ccextractor-configfile.o src/gpacmp4/ccextractor-data_map.o src/gpacmp4/ccextractor-desc_private.o src/gpacmp4/ccextractor-descriptors.o src/gpacmp4/ccextractor-drm_sample.o src/gpacmp4/ccextractor-error.o -lm -ltesseract -llept
/media/mayank/Mayank/GSOC 2017/Projects/ccextractor/src/ccextractor.c:32: undefined reference to `mprint'
/media/mayank/Mayank/GSOC 2017/Projects/ccextractor/src/ccextractor.c:33: undefined reference to `change_filename_requested'
src/ccextractor-ccextractor.o: In function `sigint_handler':
/media/mayank/Mayank/GSOC 2017/Projects/ccextractor/src/ccextractor.c:47: undefined reference to `print_file_report'
src/ccextractor-ccextractor.o: In function `print_end_msg':
/media/mayank/Mayank/GSOC 2017/Projects/ccextractor/src/ccextractor.c:55: undefined reference to `mprint'
/media/mayank/Mayank/GSOC 2017/Projects/ccextractor/src/ccextractor.c:56: undefined reference to `mprint'
src/ccextractor-ccextractor.o: In function `main':
/media/mayank/Mayank/GSOC 2017/Projects/ccextractor/src/ccextractor.c:68: undefined reference to `init_options'
/media/mayank/Mayank/GSOC 2017/Projects/ccextractor/src/ccextractor.c:70: undefined reference to `parse_configuration'
/media/mayank/Mayank/GSOC 2017/Projects/ccextractor/src/ccextractor.c:71: undefined reference to `parse_parameters'
PS：抱歉更新延迟。感谢任何帮助。我尝试了很多方法，包括更改代码中#include <path/to/header> 语句的路径，然后在CFLAGS 中添加-I 语句，但这也无济于事。几乎所有未定义的引用错误都来自位于源目录子目录中的标头中声明的函数，例如src/dir/subdir -I 标志只添加到src/dir/ 然后src/dir/ 中的文件具有类似@ 的语句987654356@。
PPS：我在src 中使用了grep -r "<Name_of_function_leading_to_error>" . 来找出声明头。
【问题讨论】：
【参考方案1】：您没有显示调用 make 来链接您的代码的行，这将非常有用。
但是，您不想将库放入LDLFLAGS（或AM_LDLFAGS）变量中；该变量用于-L等链接器标志。您应该使用LDADD：
LDADD = -lm -lz -ltesseract -llept
如果您查看 make 生成的链接行，您会看到所有这些选项都出现在链接行上的任何目标文件之前；那是不对的。 GNU binutils ld 是单通道链接器，这意味着-l 标志的顺序对于正确链接非常重要。
【讨论】：
是的。不过，更好的是让configure 定位、检查和添加所需的库，而不是在Makefile.am 中指定它们。我相信您知道，Autoconf 有一系列用于此类目的的宏。
是的，这绝对是真的。
感谢您提供的信息，如果问题仍然存在，我将更新 configure.ac 和 Makefile.am 并更新问题。感谢您的帮助。
@MadScientist 礼貌 ping。我更新了问题陈述。你能帮我吗？
此时我建议您只问一个新问题。您的原始问题已得到解答，并且您已接受答案，这意味着人们不再将其视为未决问题。你的新问题是不同的，应该得到一个新问题。您在这里的错误是链接时错误，而不是编译时错误，这意味着头文件不相关。重要的是确保定义这些函数的目标文件和库在链接行上可用。以上是关于makefile autotools的主要内容，如果未能解决你的问题，请参考以下文章
使用 autotools 生成未定义的参考错误，而自定义 Makefile 工作正常
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C/C++ makefile自动生成工具(comake2,autotools,linux),希望能为开源做点微薄的贡献!