acinclude/ac_check_define.m4
author Sam Lantinga <slouken@libsdl.org>
Fri, 28 Sep 2012 03:18:18 -0700
changeset 6491 03b7e6b0a8bf
parent 3374 725b16784e96
permissions -rw-r--r--
Fixed bug 1587 - "aclocal" fails to generate a sufficient "aclocal.m4"

Cecil Curry 2012-08-27 16:55:12 PDT

Allow "aclocal" to find the "AC_CHECK_DEFINE" macro.

On running:

rm aclocal.m4
libtoolize --install --copy --force
aclocal -I acinclude
autoconf -I acinclude

The former three commands succeed, but "autoconf" fails with:

configure.in:198: error: possibly undefined macro: AC_CHECK_DEFINE
If this token and others are legitimate, please use m4_pattern_allow.
See the Autoconf documentation.

"aclocal" fails to find AC_CHECK_DEFINE and hence add such macro to
"aclocal.m4". Here is why:

* "acinclude/ac_check_define.m4" defines AC_CHECK_DEFINE via define() rather
than AC_DEFUN().
* "aclocal" fails to find macros defined via define().
slouken@6491
     1
AC_DEFUN([AC_CHECK_DEFINE],[dnl
slouken@3342
     2
  AC_CACHE_CHECK(for $1 in $2, ac_cv_define_$1,
slouken@3342
     3
    AC_EGREP_CPP([YES_IS_DEFINED], [
slouken@3342
     4
#include <$2>
slouken@3342
     5
#ifdef $1
slouken@3342
     6
YES_IS_DEFINED
slouken@3342
     7
#endif
slouken@3342
     8
    ], ac_cv_define_$1=yes, ac_cv_define_$1=no)
slouken@3342
     9
  )
slouken@3342
    10
  if test "$ac_cv_define_$1" = "yes" ; then
slouken@3374
    11
    AC_DEFINE([HAVE_$1],[],[Added by AC_CHECK_DEFINE])
slouken@3342
    12
  fi
slouken@3342
    13
])dnl
slouken@3374
    14
AC_DEFINE([HAVE_$1],[],[Added by AC_CHECK_DEFINE])