X11 autoconf checks for IRIX 5.3?

[Thomas Richter]

Hi folks,

is there a known problem of autoconf 2.53 detecting the X11 libs on
a IRIX5.3 system? We have here:

address@hidden:~/src/atari++> uname -a
IRIX cartan 5.3 11091812 IP22 mips

However, the following configure.in:

# Check for where X11 could be
AC_PATH_X
AC_CHECK_LIB([X11], [XOpenDisplay], [], [], [[-lXt -L$x_libraries]])


just results in an 

checking for X... libraries , headers
checking for XOpenDisplay in -lX11... no

undefined X reference. However, the X libraries are clearly available:

address@hidden:~/src/atari++> ls -l /usr/lib/libX11.so
lrwxr-xr-x    1 root     sys           11 May  8  1995 /usr/lib/libX11.so -> 
libX11.so.1
address@hidden:~/src/atari++> ls -l /usr/lib/libX11.so.1
-rw-r--r--    1 root     sys      1464000 Sep  6  2001 /usr/lib/libX11.so.1
address@hidden:~/src/atari++> ls -l /usr/lib/libXt.so
-rw-r--r--    1 root     sys       823540 Sep  6  2001 /usr/lib/libXt.so

Moreover, if I modify the configure generated types.h to compile with
an XFront, the project compiles and links without any problem.

Any hints?

So long,
        Thomas