AC_DEFUN([gl_FUNC_ALLOCA],
[
AC_REQUIRE([AC_PROG_CPP])
AC_REQUIRE([AC_PROG_EGREP])
AC_REQUIRE([AC_FUNC_ALLOCA])
if test $ac_cv_func_alloca_works = no; then
gl_PREREQ_ALLOCA
fi
if test $ac_cv_working_alloca_h = yes; then
AC_CACHE_CHECK([for alloca as a compiler built-in], [gl_cv_rpl_alloca], [
AC_EGREP_CPP([Need own alloca], [
Need own alloca
], [gl_cv_rpl_alloca=yes], [gl_cv_rpl_alloca=no])
])
if test $gl_cv_rpl_alloca = yes; then
AC_DEFINE([HAVE_ALLOCA], 1,
[Define to 1 if you have 'alloca' after including <alloca.h>,
a header that may be supplied by this distribution.])
ALLOCA_H=alloca.h
else
ALLOCA_H=
fi
else
ALLOCA_H=alloca.h
fi
AC_SUBST([ALLOCA_H])
AC_DEFINE(HAVE_ALLOCA_H, 1,
[Define HAVE_ALLOCA_H for backward compatibility with older code
that includes <alloca.h> only if HAVE_ALLOCA_H is defined.])
])
AC_DEFUN([gl_PREREQ_ALLOCA], [:])