Cross-compiling with mingw

[Sylvain Beucler]

Hi,

I'm tring to cross-compile Guile from GNU/Linux with mingw (so I can
statically build guile in a .exe without having to use that other OS).

I cross-compiled gmp and libltdl (dependencies).
Now I have a few troubles with guile:


Act I) Configuration

$ CPPFLAGS="-I/usr/local/cross-tools/i386-mingw32msvc/include" \
  LDFLAGS="-L/usr/local/cross-tools/i386-mingw32msvc/lib" \
  ./configure --host=i586-mingw32msvc --build=i686-pc-linux-gnu
[...]
checking for restartable system calls... configure: error: cannot run test 
program while cross compiling

The problem apparently lies in configure.in, macro AC_SYS_RESTARTABLE_SYSCALLS

Note that the autoconf documentation deprecates this macro:
"These days portable programs [...] should not rely on
`HAVE_RESTARTABLE_SYSCALLS', since nowadays whether a system call is
restartable is a dynamic issue, not a configuration-time issue."

I commented it out for a start.


Act II) Compilation

$ make
[...]
DLL_EXPORT -DPIC -o .libs/libguile_la-stime.o
cc1: warnings being treated as errors
stime.c:85: warning: ‘tzname’ redeclared without dllimport attribute: previous 
dllimport ignored

I found 2 references to this issue:
- http://cygwin.com/ml/cygwin/2008-01/msg00491.html
=> removed tzname
- http://www.nabble.com/getdate-on-mingw:-tzname-problems-td14855896.html
=> use HAVE_DECL_TZNAME instead

I used the 2nd option:
# if !HAVE_DECL_TZNAME /* For SGI.  */
extern char *tzname[]; /* RS6000 and others reject char **tzname.  */
#endif
#if defined (__MINGW32__)
# define tzname _tzname
#endif


Act III) Linking

i586-mingw32msvc-gcc -I/usr/local/cross-tools/i386-mingw32msvc/include -g -O2 
-Wall -Wmissing-prototypes -Werror .libs/guile.exeS.o 
-I/usr/local/cross-tools/i386-mingw32msvc/include -o guile.exe guile-guile.o 
-Wl,--export-dynamic  -L/usr/local/cross-tools/i386-mingw32msvc/lib 
./.libs/libguile.a /usr/local/cross-tools/i386-mingw32msvc/lib/libgmp.a 
-lws2_32 /usr/local/cross-tools/i386-mingw32msvc/lib/libltdl.dll.a   
-L/usr/local/cross-tools/i386-mingw32msvc/lib 
-L/usr/local/cross-tools/i386-mingw32msvc/lib
guile-guile.o: In function `main':
/usr/src/guile-1.8.5/libguile/guile.c:74: undefined reference to 
`__imp__scm_boot_guile'
guile-guile.o: In function `inner_main':
/usr/src/guile-1.8.5/libguile/guile.c:55: undefined reference to 
`__imp__gdb_options'
/usr/src/guile-1.8.5/libguile/guile.c:55: undefined reference to 
`__imp__gdb_language'
/usr/src/guile-1.8.5/libguile/guile.c:55: undefined reference to 
`__imp__gdb_result'
/usr/src/guile-1.8.5/libguile/guile.c:55: undefined reference to 
`__imp__gdb_output'
/usr/src/guile-1.8.5/libguile/guile.c:55: undefined reference to 
`__imp__gdb_output_length'
/usr/src/guile-1.8.5/libguile/guile.c:55: undefined reference to 
`__imp__gdb_maybe_valid_type_p'
/usr/src/guile-1.8.5/libguile/guile.c:55: undefined reference to 
`__imp__gdb_read'
/usr/src/guile-1.8.5/libguile/guile.c:55: undefined reference to 
`__imp__gdb_eval'
/usr/src/guile-1.8.5/libguile/guile.c:55: undefined reference to 
`__imp__gdb_print'
/usr/src/guile-1.8.5/libguile/guile.c:55: undefined reference to 
`__imp__gdb_binding'
/usr/src/guile-1.8.5/libguile/guile.c:59: undefined reference to 
`__imp__scm_shell'
collect2: ld returned 1 exit status
rm -f .libs/guile.exeS.o
make[3]: *** [guile.exe] Erreur 1

Duh!
I'm out of ideas. Help? :)

-- 
Sylvain