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Replace brain-dead Autoconf macros AC_ARG_{ENABLE,WITH} with something
that's actually useful, robust, consistent. Better plan to generate aclocal.m4 as well: use m4 include directives, rather than cat.
This commit is contained in:
Peter Eisentraut
138
config/general.m4
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138
config/general.m4
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# $Header: /cvsroot/pgsql/config/general.m4,v 1.1 2000/09/21 20:17:42 petere Exp $
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# This file defines new macros to process configure command line
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# arguments, to replace the brain-dead AC_ARG_WITH and AC_ARG_ENABLE.
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# The flaw in these is particularly that they only differentiate
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# between "given" and "not given" and do not provide enough help to
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# process arguments that only accept "yes/no", that require an
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# argument (other than "yes/no"), etc.
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#
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# The point of this implementation is to reduce code size and
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# redundancy in configure.in and to improve robustness and consistency
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# in the option evaluation code.
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# print an error message and exit (while running `autoconf')
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define([pgac_error],
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[errprint(__file__:__line__[: error: $1
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])
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m4exit(10)])
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# Convert type and name to shell variable name (e.g., "enable_long_strings")
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define([pgac_arg_to_variable],
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[$1[]_[]patsubst($2, -, _)])
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# PGAC_ARG(TYPE, NAME, HELP-STRING,
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# [ACTION-IF-YES], [ACTION-IF-NO], [ACTION-IF-ARG],
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# [ACTION-IF-OMITTED])
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# ----------------------------------------------------------
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# This is the base layer. TYPE is either "with" or "enable", depending
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# on what you like. NAME is the rest of the option name, HELP-STRING
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# as usual. ACTION-IF-YES is executed if the option is given without
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# and argument (or "yes", which is the same); similar for ACTION-IF-NO.
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AC_DEFUN([PGAC_ARG],
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[dnl Check arguments
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ifelse([$1], enable, ,
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[$1], with, ,
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[pgac_error([first argument of $0 must be `enable' or `with', not `$1'])])[]dnl
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define([pgac_variable], [pgac_arg_to_variable([$1], [$2])])[]dnl
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dnl Register help string, only if there is one
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ifelse([$3], [], [],
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[AC_DIVERT_PUSH(AC_DIVERSION_NOTICE)dnl
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ac_help="$ac_help
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[$3]"
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AC_DIVERT_POP()])dnl
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[#] Check whether --$1-$2 was given
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if test x"[$]{pgac_variable+set}" = xset; then
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case [$]pgac_variable in
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yes)
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ifelse([$4], [], :, [$4])
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;;
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no)
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ifelse([$5], [], :, [$5])
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;;
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dnl Action if called with argument
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ifelse([$6], [], [],
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[ *)
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dnl Set up $withval or $enableval
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$1[]val=[$]pgac_variable
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$6
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;;
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])[]dnl
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esac [#] [$]pgac_variable
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dnl Action if omitted
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ifelse([$7], [], [],
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[else
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$7
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])[]dnl
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fi[]dnl
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undefine([pgac_variable])dnl
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])# PGAC_ARG
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# PGAC_ARG_BOOL(TYPE, NAME, DEFAULT, HELP-STRING,
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# [ACTION-IF-YES], [ACTION-IF-NO])
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# -----------------------------------------------
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# Accept a boolean option, that is, one that only takes yes or no.
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# ("no" is equivalent to "disable" or "without"). DEFAULT is what
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# should be done if the option is omitted; it should be "yes" or "no".
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# (Consequently, one of ACTION-IF-YES and ACTION-IF-NO will always
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# execute.)
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AC_DEFUN([PGAC_ARG_BOOL],
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[PGAC_ARG([$1], [$2], [$4], [$5], [$6],
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[AC_MSG_ERROR([no argument expected for --$1-$2 option])],
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[ifelse([$3], yes, [pgac_arg_to_variable([$1], [$2])=yes
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$5],
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[$3], no, [pgac_arg_to_variable([$1], [$2])=no
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$6],
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[pgac_error([third argument of $0 must be `yes' or `no', not `$3'])])])[]dnl
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])# PGAC_ARG_BOOL
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# PGAC_ARG_REQ(TYPE, NAME, HELP-STRING, [ACTION-IF-GIVEN], [ACTION-IF-NOT-GIVEN])
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# -------------------------------------------------------------------------------
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# This option will require an argument; "yes" or "no" will not be
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# accepted.
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AC_DEFUN([PGAC_ARG_REQ],
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[PGAC_ARG([$1], [$2], [$3],
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[AC_MSG_ERROR([argument required for --$1-$2 option])],
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[AC_MSG_ERROR([argument required for --$1-$2 option])],
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[$4],
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[$5])])# PGAC_ARG_REQ
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# PGAC_ARG_OPTARG(TYPE, NAME, HELP-STRING, [DEFAULT-ACTION], [ARG-ACTION]
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# [ACTION-ENABLED], [ACTION-DISABLED])
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# -----------------------------------------------------------------------
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# This will create an option that behaves as follows: If omitted, or
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# called with "no", then set the enable_variable to "no" and do
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# nothing else. If called with "yes", then execute DEFAULT-ACTION. If
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# called with argument, set enable_variable to "yes" and execute
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# ARG-ACTION. Additionally, execute ACTION-ENABLED if we ended up with
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# "yes" either way, else ACTION-DISABLED.
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#
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# The intent is to allow enabling a feature, and optionally pass an
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# additional piece of information.
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AC_DEFUN([PGAC_ARG_OPTARG],
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[PGAC_ARG([$1], [$2], [$3], [$4], [],
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[pgac_arg_to_variable([$1], [$2])=yes
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$5],
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[pgac_arg_to_variable([$1], [$2])=no])
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dnl Add this code only if there's a ACTION-ENABLED or ACTION-DISABLED.
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ifelse([$6[]$7], [], [],
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[
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if test "[$]pgac_arg_to_variable([$1], [$2])" = yes; then
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ifelse([$6], [], :, [$6])
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ifelse([$7], [], [],
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[else
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$7
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])[]dnl
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fi
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])[]dnl
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])# PGAC_ARG_OPTARG
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