Is there a guide to compile wimlib on windows os?

[Jobcrazy]

Thanks to your work, I compile it successfully on linux.

But it's very difficult to compile on windows.

I compile it with mingw(in cygwin, i686-pc-mingw32-gcc.exe),first the libxml2,then the libiconv,and then the wimlib.

But it reports a lot of errors,and it doesn't compile the files (win32_apply.c and etc)

So, is there any guide to compile wimlib on windows os?

[synchronicity]

No, there is no guide. I build the Windows release files on Linux using MinGW. See the script: tools/make-windows-release.

You may be able to build wimlib on Windows in a Cygwin environment with MinGW. Configure with: ./configure --host=i686-w64-mingw32. You must be able to satisfy the 3rd party library dependencies (libxml2, iconv, and winpthreads). For the actual release I now build these other libraries myself and statically link them into libwim.dll, but you don't have to do it that way.

[maxpat78]

...I tried with MSYS2 and mingw64 (gcc 4.9.2), but it stopped with the following error:

libtool: compile: gcc -DHAVE_CONFIG_H -I. -I./include -D_LARGEFILE_SOURCE -D_FILE_OFFSET_BITS=64 -D_GNU_SOURCE -std=gnu99 -fvisibility=hidden -fno-common -Wmissing-prototypes -Wstrict-prototypes -Wundef -Wno-pointer-sign -IC:/msys32/mingw32/include/libxml2 -g -O2 -MT src/libwim_la-dentry.lo -MD -MP -MF src/.deps/libwim_la-dentry.Tpo -c src/dentry.c -o src/libwim_la-dentry.o
src/dentry.c: In function 'read_dentry':
src/dentry.c:1243:2: error: size of unnamed array is negative
BUILD_BUG_ON(sizeof(struct wim_dentry_on_disk) != WIM_DENTRY_DISK_SIZE);
^

[synchronicity]

It looks like the configure script didn't correctly detect the platform as MinGW, so the build isn't using the right compiler flags. What arguments did you pass to configure?

[maxpat78]

./configure --without-ntfs-3g
(it detects build & host as "i686-pc-msys")

[maxpat78]

Ok, it was necessary to pass --host=i686-w64-mingw32 to correctly enable the compiler.
But now link pass fails with this error:

src/.libs/libwim_la-timestamp.o: In function wim_timestamp_to_str': C:\msys32\home\maxpat78\wimlib-1.8.0/src/timestamp.c:129: undefined reference togmtime_r'
collect2.exe: error: ld returned 1 exit status

[synchronicity]

Hi,

gmtime_r() is not available natively on Windows, so I've been relying on MinGW to provide it. On my Linux system the time.h header provided by MinGW has this:

__forceinline struct tm *__cdecl gmtime_r(const time_t *_Time, struct tm *_Tm)
{
  return gmtime_s(_Tm, _Time) ? NULL : _Tm;
}

You said you are using MinGW as well, so you should figure out why this declaration doesn't seem to exist for you. Alternatively you could replace gmtime_r() with the Windows-specific gmtime_s() (which has flipped arguments). Note that there may be other functions with the same problem.

[maxpat78]

Thanks.

In my time.h (MSYS2+mingw64), gmtime_r gets defined only when _POSIX_THREAD_SAFE_FUNCTIONS is defined.

So I've manually set -D_POSIX_THREAD_SAFE_FUNCTIONS in Makefile for targets timestamp.c and imagex.c

Now the link pass succeeds, and the resulting executable seems to work fine.

[synchronicity]

Funnily enough, I actually encountered this same problem on Linux after an upgrade of MinGW. I'll probably change configure.ac to set _POSIX_THREAD_SAFE_FUNCTIONS in the Windows-specific build flags.

[maxpat78]

P.S.

Starting the MSYS2 console with mingw32_shell.bat instead of msys2_shell.bat, the --host= switch isn't anymore required with the configure script.

[Jobcrazy]

Thank you, I'll have a try.