Without this define
DllDef is defined as:
__declspec( dllexport ) - for DLL build
and as
__declspec( dllimport ) - for your app build.
So, it works as expected: DLL exports symbols and your app imports it.
If you define LIBRAW_NODLL (for both library build and for your app build)
DllDef is defined as empty string.
So, in library this is 'just' usual functions (without extra dllexport attributes)
And your app expects just usual functions, not dllimport
if you're using win32\Makefile.msc doesn't that mean that the build will be for 32bit systems? Can you later link to a x64 project?
If not, is there a way around the issue or should I just use the latest release?
I think I managed to overcome my previous problem, and build LibRaw, but when I try to link it to my VS project I g and compile it can't find the definitions of functions I'm trying to use. e.g.
: error LNK2019: unresolved external symbol "__declspec(dllimport) public: __cdecl LibRaw::LibRaw(unsigned int)" (__imp_??0LibRaw@@QEAA@I@Z) referenced in function myFunction
Please use
1) release library (LibRaw 0.17), not development branch
2) Build the static library using
nmake -f Makefile.msvc
and use lib\libraw_static.lib for your application.
So I've managed to build the libraries, but when I try to link to my project I am getting the following errors
main.obj : error LNK2019: unresolved external symbol "__declspec(dllimport) public: int __cdecl LibRaw::open_file(char const *,__int64)" (__imp_?open_file@LibRaw@@QEAAHPEBD_J@Z) referenced in function GetColordataBlack
Sorry, no Linux on hands, so could not check the advice:
1) ./configure --enable-shared=no
2) make clean && make # to rebuild
This will remove shared (.so) libraries and will build static (.a) instead
Than build your sample.
If you have installed libraw libraries somewhere in system (/usr/local/lib or so) you may need to deinstall it
Hi, what do you mean by static build and compile.
I am kinda new to this so if you could please help.
the linkage is supposed to be in the "g++" command right?
There is no 'format list' this works different way:
each decoder may have 'flag' LIBRAW_DECODER_TRYRAWSPEED
(to get flags, call get_decoder_info).
Also, there are some exclusions (based mostly on make/model) hardcoded in LibRaw::unpack()
Speedup is not due to multicore (we use RawSpeed in single-threaded way)
We use LibRaw+RawSpeed in our projects (RawDigger, FastRawViewer) with success on both Windows and Mac.
Please note, that we use 'master' (stable) branch of RawSpeed, not the up-to-date 'devel' branch.
Speedup is very different depending on file format. It is very significant for lossless-JPEG compressed files (e.g. Canon CR2) and not so big for other formats.
I did download zlib.h and zconf.h added to include files. Or I should build it and add as a dependency? Are there any other external dependencies that I should be aware of? like perhaps libjpeg?
uncompress() is from zlib (library or DLL)
That resolved several issues. Thanks. I still can't properly compile though. It throws errors such as
libraw.lib(libraw_cxx.obj) : error LNK2019: unresolved external symbol uncompress referenced in function "protected: void __cdecl LibRaw::deflate_dng_load_raw(void)" (?deflate_dng_load_raw@LibRaw@@IEAAXXZ)
\Working-pc-13882-12680-2708-1\RAWTools.dll : fatal error LNK1120: 1 unresolved externals
CreateLibrary::cmperr: Compile error: libraw.lib(libraw_cxx.obj) : error LNK2019: unresolved external symbol uncompress referenced in function "protected: void __cdecl LibRaw::deflate_dng_load_raw(void)" (?deflate_dng_load_raw@LibRaw@@IEAAXXZ)
CreateLibrary::cmperr: Compile error: C:\Users\HP\Documents\rawtools\build\RAWTools\LibraryResources\Windows-x86-64\Working-pc-13882-12680-2708-1\RAWTools.dll : fatal error LNK1120: 1 unresolved externals
This is preprocessor option, of course.
Without this define
DllDef is defined as:
__declspec( dllexport ) - for DLL build
and as
__declspec( dllimport ) - for your app build.
So, it works as expected: DLL exports symbols and your app imports it.
If you define LIBRAW_NODLL (for both library build and for your app build)
DllDef is defined as empty string.
So, in library this is 'just' usual functions (without extra dllexport attributes)
And your app expects just usual functions, not dllimport
I'm not sure I understand, is LIBRAW_NODLL a pre-processor or linker option? The dllDef is defined just as DllDef if LIBRAW_NODLL is defined.
For static build you need to define LIBRAW_NODLL for both library build and library use.
The trick is in libraw/libraw_types.h (see how DllDef is defined)
I use static /MT build. I am using Ant build and not visual studio shell.
win32\Makefile.msc works ok for both 32 and 64 builds. Just use it from corresponding Visual studio shell (32 or 64-bit).
Link error: do you use LibRaw as static or as dynamic (dll) build?
Thank you for your answer,
if you're using win32\Makefile.msc doesn't that mean that the build will be for 32bit systems? Can you later link to a x64 project?
If not, is there a way around the issue or should I just use the latest release?
I think I managed to overcome my previous problem, and build LibRaw, but when I try to link it to my VS project I g and compile it can't find the definitions of functions I'm trying to use. e.g.
: error LNK2019: unresolved external symbol "__declspec(dllimport) public: __cdecl LibRaw::LibRaw(unsigned int)" (__imp_??0LibRaw@@QEAA@I@Z) referenced in function myFunction
In our Windows programs (RawDigger, FastRawViewer) we use zlib build by zlib's win32\Makefile.msc
No extra zlibwapi.lib is used, just zlib.lib (not zdll.lib which points to zlib.dll)
I just added include path to build specification, but I'm still getting the same error.
Sorry, I cannot continue this way.
Please use
1) release library (LibRaw 0.17), not development branch
2) Build the static library using
nmake -f Makefile.msvc
and use lib\libraw_static.lib for your application.
I didn't define it as LIBRAW_NODLL, but even after fixing that the same errors remain.
#ifdef WIN32
#ifdef LIBRAW_NODLL
# define DllDef
#else
# ifdef LIBRAW_BUILDLIB
# define DllDef __declspec( dllexport )
# else
# define DllDef __declspec( dllimport )
# endif
#endif
#else
# define DllDef
#endif
this how the libraw_types now looks like
Have you defined LIBRAW_NODLL on library and your application build?
If not, LibRaw will link as dllexport, while your app expect it as dllimport (more details are in libraw_types at DllDef define)
Hi again,
So I've managed to build the libraries, but when I try to link to my project I am getting the following errors
main.obj : error LNK2019: unresolved external symbol "__declspec(dllimport) public: int __cdecl LibRaw::open_file(char const *,__int64)" (__imp_?open_file@LibRaw@@QEAAHPEBD_J@Z) referenced in function GetColordataBlack
and more like it, what might be the issue?
Sorry, no Linux on hands, so could not check the advice:
1) ./configure --enable-shared=no
2) make clean && make # to rebuild
This will remove shared (.so) libraries and will build static (.a) instead
Than build your sample.
If you have installed libraw libraries somewhere in system (/usr/local/lib or so) you may need to deinstall it
Hi, what do you mean by static build and compile.
I am kinda new to this so if you could please help.
the linkage is supposed to be in the "g++" command right?
Regards
try to use static build and static linking.
Looks like you broke your project file in some way
There is no 'format list' this works different way:
each decoder may have 'flag' LIBRAW_DECODER_TRYRAWSPEED
(to get flags, call get_decoder_info).
Also, there are some exclusions (based mostly on make/model) hardcoded in LibRaw::unpack()
Speedup is not due to multicore (we use RawSpeed in single-threaded way)
Thanks for the quick reply. We will give it a go.
Is there a table of the formats that would use RawSpeed?
Also...is all the speed improvement in RawSpeed due to the use of multithreading?
Thanks!
Hi again, I built zlib and added it to dependencies and now I am getting
Error 11 error LNK1181: cannot open input file 'release\dcraw_emu.obj' C:\Users\HP\Documents\LibRaw\LibRaw-master\buildfiles\LINK dcraw_emu
Error 34 error LNK1181: cannot open input file 'release\dcraw_fileio.obj' C:\Users\HP\Documents\LibRaw\LibRaw-master\buildfiles\LINK libraw
And these errors.
We use LibRaw+RawSpeed in our projects (RawDigger, FastRawViewer) with success on both Windows and Mac.
Please note, that we use 'master' (stable) branch of RawSpeed, not the up-to-date 'devel' branch.
Speedup is very different depending on file format. It is very significant for lossless-JPEG compressed files (e.g. Canon CR2) and not so big for other formats.
You need to build it and add as a dependency.
All other dependencies (e.g. libjasper for jpeg2000 files) are optional, including jpeg (you can build libraw without jpeg compression support).
This one is not yet, because 0.18 branch is far from finished
I did download zlib.h and zconf.h added to include files. Or I should build it and add as a dependency? Are there any other external dependencies that I should be aware of? like perhaps libjpeg?
Libraw 0.18 (development branch) needs zlib (zlib.net) to support deflated DNG files.
This it to be changed (this dependency will change to optional) in some future update before 0.18-release.
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