+
+if test "$MINGW32" = "yes"; then
+ target_type=mingw
+else
+ if test "$CYGWIN" = "yes"; then
+ target_type=cygwin
+ else
+ target_type=unix
+ fi
+fi
+
+dnl Decide what to do based on target_type
+dnl Note: PTHREAD_LIB is always set, even if pthread is disabled.
+dnl This is because we don't know yet whether pthread is enabled.
+
+AC_ARG_ENABLE(mingw32,
+[ --enable-mingw32 Use mingw32 for a Windows GUI],
+[if test $enableval = yes; then
+ target_type=mingw
+fi])
+
+if test $target_type = mingw; then
+ WIN_ONLY=
+ SPECIAL_CFLAGS="-mwindows -mno-cygwin"
+ PTHREAD_LIB=-lpthreadGC
+ echo "Using mingw32 (Win32 GUI)"
+else
+ WIN_ONLY=#
+ if test $target_type = cygwin; then
+ SPECIAL_CFLAGS="-mno-win32"
+ PTHREAD_LIB=
+ echo "Using Cygnus (Win32 command line)"
+ else
+ SPECIAL_CFLAGS=
+ PTHREAD_LIB=-lpthread
+ fi
+fi
+AC_SUBST(WIN_ONLY)
+
+dnl Save old CFLAGS so we can restore them later, then add SPECIAL_CFLAGS
+old_CFLAGS_nospecial=$CFLAGS
+CFLAGS="$CFLAGS $SPECIAL_CFLAGS"
+
+# Hack to force AutoConf to use the CFLAGS we just set
+dnl Warning: This may break with a future version of Autoconf
+dnl Tested with autoconf 2.13
+ac_cpp='$CPP $CPPFLAGS $SPECIAL_CFLAGS'
+ac_compile='${CC-cc} -c $CFLAGS $CPPFLAGS conftest.$ac_ext 1>&5'
+ac_link='${CC-cc} -o conftest${ac_exeext} $CFLAGS $CPPFLAGS $LDFLAGS conftest.$ac_ext $LIBS 1>&5'
+
+
+dnl =================================================================
+dnl Thread support
+dnl =================================================================
+
+AC_CHECK_HEADER(pthread.h, [have_pthread=yes], [have_pthread=no])
+
+AC_ARG_ENABLE(pthread,
+[ --disable-pthread Don't use POSIX threads (pthreads)],
+[if test $enableval = no; then
+ # Disable pthreads
+ have_pthread=no
+fi])
+
+if test $have_pthread = yes; then
+ PTHREAD_ONLY=
+ AC_DEFINE(FEATURE_PTHREAD)
+ echo Using POSIX threads
+ if test "$GCC" = "yes"; then
+ # Set a GCC specific switch:
+ if test "$target_type" = "unix"; then
+ # This compiler switch makes Linux thread-safe
+ # Don't know about other OS's? Is this switch
+ # supported?
+ PTHREAD_LIB=
+ SPECIAL_CFLAGS="-pthread"
+ fi
+ fi
+else
+ PTHREAD_ONLY=#
+ echo Using native threads
+fi
+
+AC_SUBST(PTHREAD_ONLY)
+
+
+dnl =================================================================
+dnl Solaris specific
+dnl FIXME: Not tested on Solaris yet...
+dnl =================================================================
+
+AC_CANONICAL_HOST
+
+SOLARIS_ONLY=#
+
+case "$host" in
+*-solaris*) SOLARIS_ONLY=
+ AC_DEFINE(__EXTENSIONS__)
+ if test "$GCC" = "yes"; then
+ # Set a GCC specific switch:
+ # This compiler switch makes Solaris thread-safe
+ PTHREAD_LIB=
+ SPECIAL_CFLAGS="-pthreads"
+ else
+ # What do we do without GCC? Guess this:
+ SPECIAL_CFLAGS="-D_REENTRANT"
+ fi
+;;
+esac
+
+AC_SUBST(SOLARIS_ONLY)
+
+dnl =================================================================
+dnl Check for standard compiler stuff
+dnl =================================================================
+