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136 lines
4.1 KiB
Plaintext
136 lines
4.1 KiB
Plaintext
# $PostgreSQL: pgsql/config/general.m4,v 1.3 2003/11/29 19:51:17 pgsql 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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# Convert type and name to shell variable name (e.g., "enable_long_strings")
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m4_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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[
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m4_case([$1],
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enable, [
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AC_ARG_ENABLE([$2], [$3], [
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case [$]enableval in
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yes)
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m4_default([$4], :)
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;;
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no)
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m4_default([$5], :)
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;;
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*)
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$6
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;;
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esac
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],
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[$7])[]dnl AC_ARG_ENABLE
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],
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with, [
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AC_ARG_WITH([$2], [$3], [
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case [$]withval in
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yes)
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m4_default([$4], :)
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;;
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no)
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m4_default([$5], :)
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;;
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*)
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$6
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;;
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esac
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],
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[$7])[]dnl AC_ARG_WITH
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],
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[m4_fatal([first argument of $0 must be 'enable' or 'with', not '$1'])]
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)
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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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[m4_case([$3],
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yes, [pgac_arg_to_variable([$1], [$2])=yes
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$5],
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no, [pgac_arg_to_variable([$1], [$2])=no
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$6],
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[m4_fatal([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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m4_ifval([$6[]$7],
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[
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if test "[$]pgac_arg_to_variable([$1], [$2])" = yes; then
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m4_default([$6], :)
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m4_ifval([$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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