Re: fix commit 3fe5d80512ec5dbfbb2ee7dbb426be7d582e262e

[Francois Gouget]

On Sat, 17 Jan 2009, Shunichi Fuji wrote:
> > http://source.winehq.org/git/wine.git/?a=commit;h=3fe5d80512ec5dbfbb2ee7dbb4...
> > configure: Check for ESound, FreeType, GPhoto2 and SANE even if their 'xxx-config' tool is missing.

[...]
 if test "x$with_sane" != "xno"
 then
     ac_save_CPPFLAGS="$CPPFLAGS"
+    ac_sane_libs="-lsane"

We don't need -lsane here because we're using WINE_CHECK_SONAME() which 
will add it itself (see LIBS="-l$1 $5... on line 42 or aclocal.m4) and 
because we're not exporting ac_sane_libs. Having it twice would not hurt 
but it's less correct.

By the way, sane.ds will do a dlopen("libsane.so") to load SANE. That 
was justified when the dlopen() was done by twain_32.dll, but is it 
still justified now? Maybe sane.ds should simply link to libsane? That 
would also 'solve' the 'issue of the extra libraries' that we may have 
to load before loading libsane (though my understanding is that if 
libsane requires extra libs and does not link with them that's very much 
a libsane bug). If we change that then it would be a different matter.

if test "x$with_gphoto" != "xno"
 then
     ac_save_CPPFLAGS="$CPPFLAGS"
+    ac_gphoto2_libs="-lgphoto2"
     AC_CHECK_PROG(gphoto2_devel,gphoto2-config,gphoto2-config,no)

This one is right because we export ac_gphoto2_libs in GPHOTO2LIBS. 
However, I think it would be clearer to do it in the else branch of the 
test for teh xxx-config tool. So something like this:

if test "$gphoto2_devel" != "no" -a "$gphoto2port_devel" != "no"
    then
        ...
    else
        ac_gphoto2_libs="-lgphoto2" 
    fi
    ...

dnl **** Check for FreeType 2 ****
 if test "x$with_freetype" != "xno"
 then
+    ac_freetype_libs="-lfreetype"
     AC_CHECK_PROGS(ft_devel,[freetype-config freetype2-config],no)
     if test "$ft_devel" != "no"
     then

This one looks correct, but again I think it would be clearer to have it 
in the else branch (even if it's one extra line):

if test "$ft_devel" != "no"
   then
       ...
   else
       ac_freetype_libs="-lfreetype"
   fi

if test "x$with_esd" != xno
 then
     save_CFLAGS="$CFLAGS"
+    ac_esd_libs="-lesd"
     AC_PATH_PROG(ESDCONFIG, esd-config, no)
     if test "x$ESDCONFIG" != "xno"
     then

Same here.