[Mingw-users] working example (was: trying to get example testdll from mingw FAQ working - not having much luck!)

[Ed <ej...@id...>]

Howdy all!

I have a working example of a libtool library that builds and passes
tests with MingW. Here are the files, if anyone else wishes to try it.

A distribution can be found here:
ftp://ftp.unidata.ucar.edu/pub/ed/mindll-1.0.tar.gz

There are only 5 files, Makefile.am, configure.ac, mindll.c, mindll.h,
and tst_mindll.c, so I've included them all below.

I hope this helps anyone out there working with MingW and DLLs!

Thanks to the MingW team for a great port to Windows!

Ed

Makefile.am:
# This is the automake file of a minimal DLL for MingW.
# Ed Hartnett 2/6/2007

# The library.
lib_LTLIBRARIES = libmindll.la

# The source code.
include_HEADERS = mindll.h
libmindll_la_SOURCES = mindll.c

# Link options.
libmindll_la_LDFLAGS = -version-info 1:0:0 -no-undefined -Wl,--output-def,.libs/libmindll.def 

# Test program.
check_PROGRAMS = tst_mindll
TESTS = tst_mindll

# Tell the test program to link to mindll library.
LDADD = libmindll.la

configure.ac:
# This is the autoconf file of a minimal DLL for MingW.
# Ed Hartnett 2/6/2007

AC_INIT([mindll], [1.0], [goo...@us...ke])

# Find out about the host we're building on.
AC_CANONICAL_HOST

# Initialize automake with options.
AM_INIT_AUTOMAKE([foreign -Wall])

# Get C compiler.
AC_PROG_CC
AM_PROG_CC_C_O

# Produce a windows DLL. This macro must be before AM_PROG_LIBTOOL.
AC_LIBTOOL_WIN32_DLL

# Initilize libtool.
AC_PROG_LIBTOOL

# Find the install utility.
AC_PROG_INSTALL

# Produce the Makefile.
AC_CONFIG_FILES([Makefile])
AC_OUTPUT()

mindll.c:
/* This is the sole function in a minimal MingW DLL.
   Ed Hartnett, 2/6/2007 */

__declspec(dllexport) int
call_me(int i)
{
   return i-5;
}

mindll.h:
/* This is the header file for a minimal MingW DLL.
   Ed Hartnett, 2/6/2007 */

#ifdef __cplusplus
extern "C" {
#endif

/* This is the sole function of this dll. It returns i - 5. */
__declspec(dllimport) int call_me(int i);

#ifdef __cplusplus
}
#endif

tst_mindll.c:
#include <mindll.h>
#include <stdio.h>

int
main()
{
   if (call_me(6) != 1)
      return 1;
   return 0;
}