ltdl, -ansi compiler flag and windows host

[Roumen Petrov]

Hi All,

The failed case if project with ltdl included. If the project is 
configured with "-ansi" flag set to CFLAGS the build of installable ltdl 
fail with:
=======================================================
libtool: link: XXX-gcc -shared ....-Xlinker .libs/libltdl.dll.a
.libs/libltdl.lax/loadlibrary.a/loadlibrary.o:loadlibrary.c:(.text+0x115): 
undefined reference to `_SetErrorMode'
.libs/libltdl.lax/loadlibrary.a/loadlibrary.o:loadlibrary.c:(.text+0x122): 
undefined reference to `_SetErrorMode'
.libs/libltdl.lax/loadlibrary.a/loadlibrary.o:loadlibrary.c:(.text+0x12a): 
undefined reference to `_LoadLibraryA'
.libs/libltdl.lax/loadlibrary.a/loadlibrary.o:loadlibrary.c:(.text+0x134): 
undefined reference to `_SetErrorMode'
.libs/libltdl.lax/loadlibrary.a/loadlibrary.o:loadlibrary.c:(.text+0x263): 
undefined reference to `_GetModuleFileNameA'
.libs/libltdl.lax/loadlibrary.a/loadlibrary.o:loadlibrary.c:(.text+0x280): 
undefined reference to `_FreeLibrary'
.libs/libltdl.lax/loadlibrary.a/loadlibrary.o:loadlibrary.c:(.text+0x2c5): 
undefined reference to `_GetProcAddress'
Creating library file: .libs/libltdl.dll.a
=======================================================

It seems to me problem is in lt__private.h:
====================================
#ifndef __attribute__
# if __GNUC__ < 2 || (__GNUC__ == 2 && __GNUC_MINOR__ < 8) || 
__STRICT_ANSI__
#  define __attribute__(x)
# endif
#endif
====================================

When -ansi is set compiler define __STRICT_ANSI__.
__attribute__ is not defined and the code define it.
Next is problem for GCC on windows host as stdcall is defined and 
__attribute__((__stdcall__)) and result is the functions lost stdcall, 
dllexport and other decorations.

No idea how to fix and I don't know reasons for above expression. Why 
__STRICT_ANSI__ is part of expression ?

If the above code is removed(commented) the build succeed.

Regards,
Roumen