需要帮助从libjpeg编译jpegtran.c代码 [英] Need help compiling jpegtran.c code from libjpeg
问题描述
查看底部的更新
我遇到了一些奇怪的问题。对于初学者，我使用最新的Eclipse CDT，并且在实现 do_rot_180 之前，编译器将文件夹 projectName / include 链接起来，但现在需要具体的include / *。h指定
与该问题相关，在项目资源管理器中，似乎认为libjpeg.h丢失或无效，尽管它位于磁盘上的文件夹中。 p>
我正在使用libjpeg-9。
包含（包含什么是transupp.c和example.c）：
功能（do_rot_180来自transupp.c，read_JPEG_file来自example.c）：
请参阅编辑2下的更新代码块（几乎只是jpegtran.c代码）
这是ROTAT在jpegtran.c中未使用的e函数：
// LOCAL（void）
// do_rot_180（j_decompress_ptr srcinfo，j_compress_ptr dstinfo，
// JDIMENSION x_crop_offset，JDIMENSION y_crop_offset，
// jvirt_barray_ptr * src_coef_arrays，
// jvirt_barray_ptr * dst_coef_arrays）
/// * 180度旋转相当于
// * 1.垂直镜像;
// * 2.水平镜像。
// *这两个步骤被合并到单个处理例程中。
// * /
// {
// JDIMENSION MCU_cols，MCU_rows，comp_width，comp_height，dst_blk_x，dst_blk_y;
// JDIMENSION x_crop_blocks，y_crop_blocks;
// int ci，i，j，offset_y;
// JBLOCKARRAY src_buffer，dst_buffer;
// JBLOCKROW src_row_ptr，dst_row_ptr;
// JCOEFPTR src_ptr，dst_ptr;
// jpeg_component_info * compptr;
//
// MCU_cols = srcinfo-> output_width /
//（dstinfo-> max_h_samp_factor * dstinfo-> min_DCT_h_scaled_size）;
// MCU_rows = srcinfo-> output_height /
//（dstinfo-> max_v_samp_factor * dstinfo-> min_DCT_v_scaled_size）;
//
// for（ci = 0; ci< dstinfo-> num_components; ci ++）{
// compptr = dstinfo-> comp_info + ci;
// comp_width = MCU_cols * compptr-> h_samp_factor;
// comp_height = MCU_rows * compptr-> v_samp_factor;
// x_crop_blocks = x_crop_offset * compptr-> h_samp_factor;
// y_crop_blocks = y_crop_offset * compptr-> v_samp_factor;
// for（dst_blk_y = 0; dst_blk_y< compptr-> height_in_blocks;
// dst_blk_y + = compptr-> v_samp_factor）{
// dst_buffer =（* srcinfo-> ; mem-> access_virt_barray）
//（（j_common_ptr）srcinfo，dst_coef_arrays [ci]，dst_blk_y，
//（JDIMENSION）compptr-> v_samp_factor，TRUE）;
// if（y_crop_blocks + dst_blk_y< comp_height）{
// / *行位于垂直可镜像区域内。 * /
// src_buffer =（* srcinfo-> mem-> access_virt_barray）
//（（j_common_ptr）srcinfo，src_coef_arrays [ci]，
// comp_height - y_crop_blocks - dst_blk_y -
//（JDIMENSION）compptr-> v_samp_factor，
//（JDIMENSION）compptr-> v_samp_factor，FALSE）;
//} else {
// / *底边行只能水平镜像。 * /
// src_buffer =（* srcinfo-> mem-> access_virt_barray）
//（（j_common_ptr）srcinfo，src_coef_arrays [ci]，
// dst_blk_y + y_crop_blocks，
//（JDIMENSION）compptr-> v_samp_factor，FALSE）;
//}
// for（offset_y = 0; offset_y< compptr-> v_samp_factor; offset_y ++）{
// dst_row_ptr = dst_buffer [offset_y];
// if（y_crop_blocks + dst_blk_y< comp_height）{
// / * Row在可镜像区域内。 * /
// src_row_ptr = src_buffer [compptr-> v_samp_factor - offset_y - 1];
// for（dst_blk_x = 0; dst_blk_x< compptr-> width_in_blocks; dst_blk_x ++）{
// dst_ptr = dst_row_ptr [dst_blk_x];
// if（x_crop_blocks + dst_blk_x< comp_width）{
// / *处理可以双向镜像的块。 * /
// src_ptr = src_row_ptr [comp_width - x_crop_blocks - dst_blk_x - 1];
// for（i = 0; i // / *对于偶数行，否定每个奇数列。 * /
// for（j = 0; j // * dst_ptr ++ = * src_ptr ++;
// * dst_ptr ++ = - * src_ptr ++;
//}
// / *对于奇数行，否定每个偶数列。 * /
// for（j = 0; j // * dst_ptr ++ = - * src_ptr ++;
// * dst_ptr ++ = * src_ptr ++;
//}
//}
//} else {
// / *任何剩余的右边框只能垂直镜像。 * /
// src_ptr = src_row_ptr [x_crop_blocks + dst_blk_x];
// for（i = 0; i // for（j = 0; j
// for（j = 0; j
//}
//}
//}
//} else {
// / *剩余的行只是水平镜像。 * /
// src_row_ptr = src_buffer [offset_y];
// for（dst_blk_x = 0; dst_blk_x< compptr-> width_in_blocks; dst_blk_x ++）{
// if（x_crop_blocks + dst_blk_x< comp_width）{
// / *可以镜像的块。 * /
// dst_ptr = dst_row_ptr [dst_blk_x];
// src_ptr = src_row_ptr [comp_width - x_crop_blocks - dst_blk_x - 1];
// for（i = 0; i // * dst_ptr ++ = * src_ptr ++;
// * dst_ptr ++ = - * src_ptr ++;
//}
//} else {
// / *仅复制任何剩余的右边块。 * /
// jcopy_block_row（src_row_ptr + dst_blk_x + x_crop_blocks，
// dst_row_ptr + dst_blk_x，
//（JDIMENSION）1）;
//}
//}
//}
//}
//}
//}
//}
除此之外，我找不到位于 jcopy_block_row 的位置。我查看了所有的include文件及其.c对应文件。
我在read_JPEG_file函数中注释出错误处理的东西，并希望从内部调用do_rot_180我没有得到那么远。
我发现的唯一线索是在transupp.c中：
附加注意事项： jpegtran.exe与编译的.DLL分开工作，所以它必须在某个地方。
编辑 - 复制jpegint.h
#ifdef JPEG_INTERNALS
#includejpegint.h/ * fetch私人声明* /
#includejerror.h/ *提取错误代码* /
#endif
现在无法编译，尽管它们似乎都在jpeglib.h或jpegint.h中声明：
编辑2 - 代码现在包含jpegtran.c能够旋转180度。更新代码块：
/ ********************* ************************************************** ********** /
/ *定义* /
/ ************************* ************************************************** ****** /
#define JPEG_INTERNALS
/ ************************* ************************************************** ******** /
/ *包含* /
/ *************************** ************************************************** **** /
#include< stdio.h>
#include< iostream>
#includejinclude.h
#includejpeglib.h
#includecdjpeg.h
#includetransupp.h
#includejerror.h
#include< ctype.h>
#include< setjmp.h>
// using namespace std;
static char * infilename;
static char * outfilename;
static JCOPY_OPTION copyoption;
static jpeg_transform_info transformoption;
FILE * infile;
FILE * outfile;
void openFile（char file）{
if（file =='i'）{
infile = fopen（infilename，rb）;
}
else if（file =='o'）{
outfile = fopen（outfilename，wb）;
}
}
/ ******************************* ************************************************** /
/ *主执行块* /
/ *********************************** ************************************************ /
int main（）{
struct jpeg_decompress_struct srcinfo;
struct jpeg_compress_struct dstinfo;
struct jpeg_error_mgr jsrcerr，jdsterr;
jvirt_barray_ptr * src_coef_arrays;
jvirt_barray_ptr * dst_coef_arrays;
// int file_index;
srcinfo.err = jpeg_std_error（& jsrcerr）;
jpeg_create_decompress（& srcinfo）;
dstinfo.err = jpeg_std_error（& jdsterr）;
jpeg_create_compress（& dstinfo）;
jsrcerr.trace_level = jdsterr.trace_level;
srcinfo.mem-> max_memory_to_use = dstinfo.mem-> max_memory_to_use;
//
outfilename = NULL;
copyoption = JCOPYOPT_DEFAULT;
transformoption.transform = JXFORM_NONE;
transformoption.trim = FALSE;
transformoption.force_grayscale = FALSE;
transformoption.transform = JXFORM_ROT_180;
//
std :: cout<<< 输入文件名旋转180度。 <<的std :: ENDL;
std :: cin>> infilename;
openFile（'i'）;
std :: cout<<< 输入输出文件名。 <<的std :: ENDL;
std :: cin>> outfilename;
openFile（'o'）;
//
jpeg_stdio_src（& srcinfo，infile）;
jcopy_markers_setup（& srcinfo，copyoption）;
（void）jpeg_read_header（& srcinfo，TRUE）;
jtransform_request_workspace（& srcinfo& transformoption）;
src_coef_arrays = jpeg_read_coefficients（& srcinfo）;
jpeg_copy_critical_parameters（& srcinfo，& dstinfo）;
dst_coef_arrays = jtransform_adjust_parameters（& srcinfo，& dstinfo，
src_coef_arrays，
& transformoption）;
jpeg_stdio_dest（& dstinfo，outfile）;
jpeg_write_coefficients（& dstinfo，dst_coef_arrays）;
jcopy_markers_execute（& srcinfo，& dstinfo，copyoption）;
jtransform_execute_transformation（& srcinfo，& dstinfo，
src_coef_arrays，
& transformoption）;
jpeg_finish_compress（& dstinfo）;
jpeg_destroy_compress（& dstinfo）;
（void）jpeg_finish_decompress（& srcinfo）;
jpeg_destroy_decompress（& srcinfo）;
//
if（infile！= stdin）
fclose（infile）;
if（outfile！= stdout）
fclose（outfile）;
return 0;
}
/ ************************************ ******************************************* /
/ *节目结束* /
/ ************************************** ***************************************** /
编辑3 - 做出了Jeff提到的更改，我遇到这个问题编译它（在Eclipse中）：
找不到-lC：\Users\tmp\workspace2\jpegManipulator\ lib \libjpeg.a jpeg操纵器C / C ++问题
无效的项目路径：找到重复的路径条目（/ jpegManipulator [Include path] base-path：jpegManipulator isSystemInclude：true includePath：include），path：[/ jpegManipulator]。 jpegManipulator pathentry路径输入问题
我将工作区目录/ lib设置为库源，并且还具有特定的libjpeg。在图书馆选项卡中设置一个库 - 这是绝对的在目录中。
如果我不包括特定的libjpeg.a文件，它会抱怨功能引用缺失，但如果我包含它，它抱怨说那里是没有libjpeg.a被找到。这是用于v9和v6b。
找不到-lC：\Users\tmp\workspace2\jpeg6bmanip\\ \\ lib / 解决方案编辑3 问题：https://stackoverflow.com/q/14692302/1666510 之后的新问题。无法运行程序或调试它，因为它声称它无法找到jpeglib.h 。
几年前，我和MinGW一起开发类似的东西。我不得不下载libjpeg的源码并在我的机器上构建它，以获取libjpeg.a文件。来源可以在这里找到：
当我构建这个库时，我发现的问题是当我执行'nm libjpeg.a'时，显然符号在cdjpeg.h和transupp.h没有被编译到库中。我没有找到办法通过配置，因为我没有看到任何明显的，当我'配置 - 帮助'。而是编辑了Makefile.in文件，它定义了.lo文件的am__objects_1列表。我在最后添加了cdjpeg和transupp，如下所示：
am__objects_1 = jaricom.lo jcapimin.lo jcapistd.lo jcarith.lo \\ \\
jccoefct.lo jccolor.lo jcdctmgr.lo jchuff.lo jcinit.lo \
jcmainct.lo jcmarker.lo jcmaster.lo jcomapi.lo jcparam.lo \
jcprepct.lo jcsample.lo jctrans.lo jdapimin.lo jdapistd.lo \
jdarith.lo jdatadst.lo jdatasrc.lo jdcoefct.lo jdcolor.lo \
jddctmgr.lo jdhuff.lo jdinput.lo jdmainct。 lo j b。。b b b b b b b b $ b jidctfst.lo jidctint.lo jquant1.lo jquant2.lo jutils.lo \
jmemmgr.lo cdjpeg.lo transupp.lo @ MEMORYMGR @ .lo
然后我做了一个'make'和'make install'，符号出现在库中。在这一点上，我能够得到你的代码来构建。一个自动工具专家可能会想出一个更好的方式来做，但这至少会让你走。
See bottom for updates
I am running into a number of odd problems. For starters, I'm using the latest Eclipse CDT and before implementing do_rot_180, the compiler linked the folder projectName/include but after it now requires specific include/*.h specified below.
Related to that issue, in the project explorer, it seems to think libjpeg.h is missing or invalid despite it being in the folder on the disk.
I am working with libjpeg-9.
Includes (included what transupp.c and example.c included):
Functions (do_rot_180 is from transupp.c and read_JPEG_file is from example.c):
See updated code block below under Edit 2 (pretty much just jpegtran.c code)
This is the rotate function which is unused in jpegtran.c:
//LOCAL(void)
//do_rot_180 (j_decompress_ptr srcinfo, j_compress_ptr dstinfo,
// JDIMENSION x_crop_offset, JDIMENSION y_crop_offset,
// jvirt_barray_ptr *src_coef_arrays,
// jvirt_barray_ptr *dst_coef_arrays)
///* 180 degree rotation is equivalent to
// * 1. Vertical mirroring;
// * 2. Horizontal mirroring.
// * These two steps are merged into a single processing routine.
// */
//{
// JDIMENSION MCU_cols, MCU_rows, comp_width, comp_height, dst_blk_x, dst_blk_y;
// JDIMENSION x_crop_blocks, y_crop_blocks;
// int ci, i, j, offset_y;
// JBLOCKARRAY src_buffer, dst_buffer;
// JBLOCKROW src_row_ptr, dst_row_ptr;
// JCOEFPTR src_ptr, dst_ptr;
// jpeg_component_info *compptr;
//
// MCU_cols = srcinfo->output_width /
// (dstinfo->max_h_samp_factor * dstinfo->min_DCT_h_scaled_size);
// MCU_rows = srcinfo->output_height /
// (dstinfo->max_v_samp_factor * dstinfo->min_DCT_v_scaled_size);
//
// for (ci = 0; ci < dstinfo->num_components; ci++) {
// compptr = dstinfo->comp_info + ci;
// comp_width = MCU_cols * compptr->h_samp_factor;
// comp_height = MCU_rows * compptr->v_samp_factor;
// x_crop_blocks = x_crop_offset * compptr->h_samp_factor;
// y_crop_blocks = y_crop_offset * compptr->v_samp_factor;
// for (dst_blk_y = 0; dst_blk_y < compptr->height_in_blocks;
// dst_blk_y += compptr->v_samp_factor) {
// dst_buffer = (*srcinfo->mem->access_virt_barray)
// ((j_common_ptr) srcinfo, dst_coef_arrays[ci], dst_blk_y,
// (JDIMENSION) compptr->v_samp_factor, TRUE);
// if (y_crop_blocks + dst_blk_y < comp_height) {
// /* Row is within the vertically mirrorable area. */
// src_buffer = (*srcinfo->mem->access_virt_barray)
// ((j_common_ptr) srcinfo, src_coef_arrays[ci],
// comp_height - y_crop_blocks - dst_blk_y -
// (JDIMENSION) compptr->v_samp_factor,
// (JDIMENSION) compptr->v_samp_factor, FALSE);
// } else {
// /* Bottom-edge rows are only mirrored horizontally. */
// src_buffer = (*srcinfo->mem->access_virt_barray)
// ((j_common_ptr) srcinfo, src_coef_arrays[ci],
// dst_blk_y + y_crop_blocks,
// (JDIMENSION) compptr->v_samp_factor, FALSE);
// }
// for (offset_y = 0; offset_y < compptr->v_samp_factor; offset_y++) {
// dst_row_ptr = dst_buffer[offset_y];
// if (y_crop_blocks + dst_blk_y < comp_height) {
// /* Row is within the mirrorable area. */
// src_row_ptr = src_buffer[compptr->v_samp_factor - offset_y - 1];
// for (dst_blk_x = 0; dst_blk_x < compptr->width_in_blocks; dst_blk_x++) {
// dst_ptr = dst_row_ptr[dst_blk_x];
// if (x_crop_blocks + dst_blk_x < comp_width) {
// /* Process the blocks that can be mirrored both ways. */
// src_ptr = src_row_ptr[comp_width - x_crop_blocks - dst_blk_x - 1];
// for (i = 0; i < DCTSIZE; i += 2) {
// /* For even row, negate every odd column. */
// for (j = 0; j < DCTSIZE; j += 2) {
// *dst_ptr++ = *src_ptr++;
// *dst_ptr++ = - *src_ptr++;
// }
// /* For odd row, negate every even column. */
// for (j = 0; j < DCTSIZE; j += 2) {
// *dst_ptr++ = - *src_ptr++;
// *dst_ptr++ = *src_ptr++;
// }
// }
// } else {
// /* Any remaining right-edge blocks are only mirrored vertically. */
// src_ptr = src_row_ptr[x_crop_blocks + dst_blk_x];
// for (i = 0; i < DCTSIZE; i += 2) {
// for (j = 0; j < DCTSIZE; j++)
// *dst_ptr++ = *src_ptr++;
// for (j = 0; j < DCTSIZE; j++)
// *dst_ptr++ = - *src_ptr++;
// }
// }
// }
// } else {
// /* Remaining rows are just mirrored horizontally. */
// src_row_ptr = src_buffer[offset_y];
// for (dst_blk_x = 0; dst_blk_x < compptr->width_in_blocks; dst_blk_x++) {
// if (x_crop_blocks + dst_blk_x < comp_width) {
// /* Process the blocks that can be mirrored. */
// dst_ptr = dst_row_ptr[dst_blk_x];
// src_ptr = src_row_ptr[comp_width - x_crop_blocks - dst_blk_x - 1];
// for (i = 0; i < DCTSIZE2; i += 2) {
// *dst_ptr++ = *src_ptr++;
// *dst_ptr++ = - *src_ptr++;
// }
// } else {
// /* Any remaining right-edge blocks are only copied. */
// jcopy_block_row(src_row_ptr + dst_blk_x + x_crop_blocks,
// dst_row_ptr + dst_blk_x,
// (JDIMENSION) 1);
// }
// }
// }
// }
// }
// }
//}
On top of that, I can't actually find where jcopy_block_row is defined. I've looked through all of the include files and their .c counterparts.
I commented out the error handling stuff in the read_JPEG_file function and want to call do_rot_180 from within but I haven't gotten that far yet.
The only clue I've found is this in transupp.c:
Additional note: jpegtran.exe works separately with the compiled .DLL so it's got to be somewhere.
Edit - copied jpegint.h over into include/ which resolved the include issues.
#ifdef JPEG_INTERNALS
#include "jpegint.h" /* fetch private declarations */
#include "jerror.h" /* fetch error codes too */
#endif
Now it's unable to compile even though they all seem to be declared in jpeglib.h or jpegint.h:
Edit 2 - code now contains jpegtran.c stuff for just being able to rotate 180 degrees. Updated code block:
/*********************************************************************************/
/* Defines */
/*********************************************************************************/
#define JPEG_INTERNALS
/*********************************************************************************/
/* Includes */
/*********************************************************************************/
#include <stdio.h>
#include <iostream>
#include "jinclude.h"
#include "jpeglib.h"
#include "cdjpeg.h"
#include "transupp.h"
#include "jerror.h"
#include <ctype.h>
#include <setjmp.h>
//using namespace std;
static char * infilename;
static char * outfilename;
static JCOPY_OPTION copyoption;
static jpeg_transform_info transformoption;
FILE * infile;
FILE * outfile;
void openFile(char file) {
if(file == 'i') {
infile = fopen(infilename, "rb");
}
else if(file == 'o') {
outfile = fopen(outfilename, "wb");
}
}
/*********************************************************************************/
/* Main Execution Block */
/*********************************************************************************/
int main() {
struct jpeg_decompress_struct srcinfo;
struct jpeg_compress_struct dstinfo;
struct jpeg_error_mgr jsrcerr, jdsterr;
jvirt_barray_ptr * src_coef_arrays;
jvirt_barray_ptr * dst_coef_arrays;
//int file_index;
srcinfo.err = jpeg_std_error(&jsrcerr);
jpeg_create_decompress(&srcinfo);
dstinfo.err = jpeg_std_error(&jdsterr);
jpeg_create_compress(&dstinfo);
jsrcerr.trace_level = jdsterr.trace_level;
srcinfo.mem->max_memory_to_use = dstinfo.mem->max_memory_to_use;
//
outfilename = NULL;
copyoption = JCOPYOPT_DEFAULT;
transformoption.transform = JXFORM_NONE;
transformoption.trim = FALSE;
transformoption.force_grayscale = FALSE;
transformoption.transform = JXFORM_ROT_180;
//
std::cout << "Enter a filename to rotate 180 degrees." << std::endl;
std::cin >> infilename;
openFile('i');
std::cout << "Enter the output filename." << std::endl;
std::cin >> outfilename;
openFile('o');
//
jpeg_stdio_src(&srcinfo, infile);
jcopy_markers_setup(&srcinfo, copyoption);
(void) jpeg_read_header(&srcinfo, TRUE);
jtransform_request_workspace(&srcinfo, &transformoption);
src_coef_arrays = jpeg_read_coefficients(&srcinfo);
jpeg_copy_critical_parameters(&srcinfo, &dstinfo);
dst_coef_arrays = jtransform_adjust_parameters(&srcinfo, &dstinfo,
src_coef_arrays,
&transformoption);
jpeg_stdio_dest(&dstinfo, outfile);
jpeg_write_coefficients(&dstinfo, dst_coef_arrays);
jcopy_markers_execute(&srcinfo, &dstinfo, copyoption);
jtransform_execute_transformation(&srcinfo, &dstinfo,
src_coef_arrays,
&transformoption);
jpeg_finish_compress(&dstinfo);
jpeg_destroy_compress(&dstinfo);
(void) jpeg_finish_decompress(&srcinfo);
jpeg_destroy_decompress(&srcinfo);
//
if (infile != stdin)
fclose(infile);
if (outfile != stdout)
fclose(outfile);
return 0;
}
/*********************************************************************************/
/* End of Program */
/*********************************************************************************/
Edit 3 - Made the changes Jeff mentioned and I am running into this problem when compiling it (in Eclipse):
cannot find -lC:\Users\tmp\workspace2\jpegManipulator\lib\libjpeg.a jpegManipulator C/C++ Problem
Invalid project path: Duplicate path entries found (/jpegManipulator [Include path] base-path:jpegManipulator isSystemInclude:true includePath:include), path: [/jpegManipulator].jpegManipulator pathentry Path Entry Problem
I have workspace directory /lib set as library source and also the specific libjpeg.a library set in the libraries tab - It is definitely in the directory.
If I don't include the specific libjpeg.a file, it complains about missing function references but if I do include it, it complains saying that there is no libjpeg.a to be found. This is for both v9 and v6b.
cannot find -lC:\Users\tmp\workspace2\jpeg6bmanip\libs\libjpeg.a jpeg6bmanip C/C++ Problem
cannot find -lC:\Users\tmp\workspace2\jpeg6bmanip\libs\libjpeg.la jpeg6bmanip C/C++ Problem
Solution to Edit 3 problem: https://stackoverflow.com/q/14692302/1666510 but new problem after that. Can't run the program or debug it because it claims it cannot find jpeglib.h.
I had something similar happen when developing with MinGW a couple of years ago. I had to download the source for libjpeg and build it on my machine in order to get the libjpeg.a file. The source can be found here:
The problem that I found when I built this library was that when I executed 'nm libjpeg.a' it became clear that the symbols in cdjpeg.h and transupp.h were not being compiled into the library. I couldn't find a way to do it via configure since I didn't see anything obvious when I did 'configure --help'. Instead I edited the Makefile.in file where it defines the am__objects_1 list of .lo files. I added cdjpeg and transupp at the end like this:
am__objects_1 = jaricom.lo jcapimin.lo jcapistd.lo jcarith.lo \
jccoefct.lo jccolor.lo jcdctmgr.lo jchuff.lo jcinit.lo \
jcmainct.lo jcmarker.lo jcmaster.lo jcomapi.lo jcparam.lo \
jcprepct.lo jcsample.lo jctrans.lo jdapimin.lo jdapistd.lo \
jdarith.lo jdatadst.lo jdatasrc.lo jdcoefct.lo jdcolor.lo \
jddctmgr.lo jdhuff.lo jdinput.lo jdmainct.lo jdmarker.lo \
jdmaster.lo jdmerge.lo jdpostct.lo jdsample.lo jdtrans.lo \
jerror.lo jfdctflt.lo jfdctfst.lo jfdctint.lo jidctflt.lo \
jidctfst.lo jidctint.lo jquant1.lo jquant2.lo jutils.lo \
jmemmgr.lo cdjpeg.lo transupp.lo @MEMORYMGR@.lo
Then I did a 'make' and a 'make install' and the symbols were present in the library. At that point I was able to get your code to build. An autotools expert may be able to come up with a better way to do it but this will at least get you going.
这篇关于需要帮助从libjpeg编译jpegtran.c代码的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！
