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AC_PROG_OBJC and automake 1.9


From: Vincent Torri
Subject: AC_PROG_OBJC and automake 1.9
Date: Tue, 10 Mar 2009 14:58:07 +0100 (CET)


Hey,

i want to compile a program for mac os x, using AC_PROG_OBJC. Actually, i didn't write that part. Here is what is used to check the compiler in the configure.ac file:


m4_ifdef([AC_PROG_OBJC],
   [AC_PROG_OBJC],
   [AC_CHECK_TOOL([OBJC], [gcc])
    AC_SUBST([OBJC])
    AC_SUBST([OBJCFLAGS])
   ])

The .m file in the Makefile.am file is just in the source variable:

libecore_quartz_la_SOURCES = ecore_quartz.m

With automake 1.9, we have the following message:

/usr/share/automake-1.9/am/depend2.am: am__fastdepOBJC does not appear in 
AM_CONDITIONAL

This error does not appear with automake 1.10 (afaik).

I don't know why the author use m4_ifdef to check the compiler. So I would like to know what is the best way to check for objective c compiler and what are the possible problems with respect to automake versions.

thank you

Vincent Torri




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