我试图将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make之后运行autoreconf -i，则构建失败并显示错误：
/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./configure运行./configure LIBS="-lm -lz"版本失败，错误为：
/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目录中的 src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，所有包含都在src的子目录中使用完整路径完成，就像gpacmp4目录中的文件#include <gpac/avparse.h>一样。除了主ccextractor.c个文件之外的所有文件，都提供了所有-I flags。
引用ccextractor原始代码： https://github.com/CCExtractor/ccextractor
原始Makefile将位于linux目录中。
PS：目前我试图获得ccextractor构建所有检查将在稍后介绍。对于简化机制，ccextractor/linux/build对于引用很有用。
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
构建＆＃34; ccextractor＆＃34;的build脚本完全没问题的是：
#!/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：抱歉延迟更新。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-I中添加CFLAGS语句，但这也没有帮助。几乎所有未定义的引用错误都来自驻留在源目录的子目录中的头中声明的函数，如src/dir/subdir -I标志仅添加到src/dir/然后src/dir/中的文件{1}}包含#include<subdir/filename.h>之类的语句。
PPS：我在grep -r "<Name_of_function_leading_to_error>" .中使用了src来查找声明标题。
答案 0 :(得分：2)
您不会显示调用的行以链接您的代码，这将非常有用。
但是，您不希望将库放入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
如果您查看生成的链接行，您将在链接行上的任何目标文件之前看到所有这些选项;这不对。 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。