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51 lines
1.6 KiB
Plaintext
51 lines
1.6 KiB
Plaintext
dnl --------------------------------------------------------------------
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dnl Restricted form of AC_ARG_ENABLE that ensures user doesn't give bogus
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dnl values.
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dnl
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dnl Parameters:
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dnl $1 = option name
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dnl $2 = help-string
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dnl $3 = action to perform if option is not default
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dnl $4 = action if perform if option is default
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dnl $5 = default option value (either 'yes' or 'no')
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AC_DEFUN([CF_ARG_OPTION],
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[AC_ARG_ENABLE($1,[$2],[test "$enableval" != ifelse($5,no,yes,no) && enableval=ifelse($5,no,no,yes)
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if test "$enableval" != "$5" ; then
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ifelse($3,,[ :]dnl
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,[ $3]) ifelse($4,,,[
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else
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$4])
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fi],[enableval=$5 ifelse($4,,,[
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$4
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])dnl
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])])dnl
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dnl --------------------------------------------------------------------
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dnl Check for declaration of sys_errlist in one of stdio.h and errno.h.
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dnl Declaration of sys_errlist on BSD4.4 interferes with our declaration.
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dnl Reported by Keith Bostic.
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AC_DEFUN([CF_SYS_ERRLIST],
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[
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AC_MSG_CHECKING([declaration of sys_errlist])
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AC_CACHE_VAL(cf_cv_dcl_sys_errlist,[
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AC_TRY_COMPILE([
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#include <stdio.h>
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#include <sys/types.h>
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#include <errno.h> ],
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[char *c = (char *) *sys_errlist],
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[cf_cv_dcl_sys_errlist=yes],
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[cf_cv_dcl_sys_errlist=no])])
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AC_MSG_RESULT($cf_cv_dcl_sys_errlist)
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# It's possible (for near-UNIX clones) that sys_errlist doesn't exist
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if test $cf_cv_dcl_sys_errlist = no ; then
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AC_DEFINE(DECL_SYS_ERRLIST)
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AC_MSG_CHECKING([existence of sys_errlist])
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AC_CACHE_VAL(cf_cv_have_sys_errlist,[
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AC_TRY_LINK([#include <errno.h>],
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[char *c = (char *) *sys_errlist],
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[cf_cv_have_sys_errlist=yes],
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[cf_cv_have_sys_errlist=no])])
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AC_MSG_RESULT($cf_cv_have_sys_errlist)
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fi
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])dnl
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