diff options
| -rw-r--r-- | configure.in | 49 |
1 files changed, 28 insertions, 21 deletions
diff --git a/configure.in b/configure.in index a8de417d3..e4bfab9b0 100644 --- a/configure.in +++ b/configure.in @@ -576,27 +576,34 @@ AC_CHECK_LIB(z,gzgets, IMAGELIBS="-lfltk_z $IMAGELIBS" fi) -AC_ARG_ENABLE(localpng, [ --enable-localpng use local PNG library, default=auto], - [if test x$enable_localpng = xyes; then - ac_cv_lib_png_png_set_tRNS_to_alpha=yes - AC_DEFINE(HAVE_LIBPNG) - AC_DEFINE(HAVE_PNG_H) - AC_DEFINE(HAVE_PNG_GET_VALID) - AC_DEFINE(HAVE_PNG_SET_TRNS_TO_ALPHA) - PNGINC="-I../png" - PNG="png" - IMAGELIBS="-lfltk_png $IMAGELIBS" - else - PNGINC="" - PNG="" - IMAGELIBS="-lpng $IMAGELIBS" - AC_DEFINE(HAVE_LIBPNG) - AC_DEFINE(HAVE_PNG_GET_VALID) - AC_CHECK_LIB(png,png_set_tRNS_to_alpha, - AC_DEFINE(HAVE_PNG_SET_TRNS_TO_ALPHA)) - AC_CHECK_HEADER(png.h, - AC_DEFINE(HAVE_PNG_H)) - fi]) +# Handle the PNG lib linking mode (use fltk local or system lib) +# If --enable-(resp. --disable-)localpng parameter is not set by user +# Then we check the png lib usability with result in syspng_lib variable +AC_ARG_ENABLE(localpng, [ --enable-localpng use local PNG library, default=auto]) +# does not work correctly under cygwin ? (header not found ) +#AC_CHECK_LIB(png, png_read_info, [AC_CHECK_HEADER(png.h, syslib_ok=yes)]) +AC_CHECK_LIB(png, png_read_info,[syspnglib_ok=yes], [syspnglib_ok=no]) +#AC_MSG_WARN("*** USING LIB OK : $syspnglib_ok") +# The following is executed if the lib was not found or if local lib is required explicitly +if test x$enable_localpng = xyes -o x$syspnglib_ok = xno ; then + ac_cv_lib_png_png_set_tRNS_to_alpha=yes + AC_DEFINE(HAVE_LIBPNG) + AC_DEFINE(HAVE_PNG_H) + AC_DEFINE(HAVE_PNG_GET_VALID) + AC_DEFINE(HAVE_PNG_SET_TRNS_TO_ALPHA) + PNGINC="-I../png" + PNG="png" + IMAGELIBS="-lfltk_png $IMAGELIBS" +# AC_MSG_WARN("*** USING PNG LOCAL SETUP") +else + PNGINC="" + PNG="" + IMAGELIBS="-lpng $IMAGELIBS" + AC_DEFINE(HAVE_LIBPNG) + AC_DEFINE(HAVE_PNG_GET_VALID) + AC_CHECK_LIB(png,png_set_tRNS_to_alpha, AC_DEFINE(HAVE_PNG_SET_TRNS_TO_ALPHA)) +# AC_MSG_WARN("*** USING PNG LIB SETUP") +fi AC_SUBST(JPEG) AC_SUBST(JPEGINC) |