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88 lines
2.3 KiB
Plaintext
88 lines
2.3 KiB
Plaintext
dnl ---------------------------------------------------------------------------
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dnl Make an uppercase version of a variable
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dnl $1=uppercase($2)
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AC_DEFUN([CF_UPPER],
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[
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changequote(,)dnl
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$1=`echo $2 | tr '[a-z]' '[A-Z]'`
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changequote([,])dnl
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])dnl
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dnl ---------------------------------------------------------------------------
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dnl Check for existence of external data in the current set of libraries. If
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dnl we can modify it, it's real enough.
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dnl $1 = the name to check
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dnl $2 = its type
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AC_DEFUN([CF_CHECK_EXTERN_DATA],
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[
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AC_MSG_CHECKING(if external $1 exists)
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AC_CACHE_VAL(cf_cv_have_$1,[
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AC_TRY_LINK([
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#undef $1
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extern $2 $1;
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],
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[$1 = 2],
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[eval 'cf_cv_have_'$1'=yes'],
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[eval 'cf_cv_have_'$1'=no'])])
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eval 'cf_result=$cf_cv_have_'$1
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AC_MSG_RESULT($cf_result)
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if test "$cf_result" = yes ; then
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eval 'cf_result=HAVE_'$1
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CF_UPPER(cf_result,$cf_result)
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AC_DEFINE_UNQUOTED($cf_result)
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fi
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])dnl
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dnl ---------------------------------------------------------------------------
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dnl Check for data that is usually declared in <stdio.h> or <errno.h>, e.g.,
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dnl the 'errno' variable. Define a DECL_xxx symbol if we must declare it
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dnl ourselves.
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dnl
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dnl (I would use AC_CACHE_CHECK here, but it will not work when called in a
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dnl loop from CF_SYS_ERRLIST).
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dnl
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dnl $1 = the name to check
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AC_DEFUN([CF_CHECK_ERRNO],
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[
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AC_MSG_CHECKING(if external $1 is declared)
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AC_CACHE_VAL(cf_cv_dcl_$1,[
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AC_TRY_COMPILE([
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#ifdef HAVE_STDLIB_H
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#include <stdlib.h>
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#endif
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#include <stdio.h>
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#include <sys/types.h>
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#include <errno.h> ],
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[long x = (long) $1],
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[eval 'cf_cv_dcl_'$1'=yes'],
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[eval 'cf_cv_dcl_'$1'=no]')
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])
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eval 'cf_result=$cf_cv_dcl_'$1
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AC_MSG_RESULT($cf_result)
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if test "$cf_result" = no ; then
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eval 'cf_result=DECL_'$1
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CF_UPPER(cf_result,$cf_result)
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AC_DEFINE_UNQUOTED($cf_result)
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fi
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# It's possible (for near-UNIX clones) that the data doesn't exist
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CF_CHECK_EXTERN_DATA($1,int)
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])dnl
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dnl ---------------------------------------------------------------------------
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dnl Check for declaration of sys_nerr and sys_errlist in one of stdio.h and
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dnl errno.h. Declaration of sys_errlist on BSD4.4 interferes with our
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dnl declaration. Reported by Keith Bostic.
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AC_DEFUN([CF_SYS_ERRLIST],
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[
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for cf_name in sys_nerr sys_errlist
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do
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CF_CHECK_ERRNO($cf_name)
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done
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])dnl
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