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Added two helper macros to manipulate *FLAGS vars

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Evgeny Grin (Karlson2k)
2022-04-03 20:17:43 +03:00
parent 29dfdc7cfb
commit a3579e7061
2 changed files with 92 additions and 0 deletions
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m4/mhd_append_flag_to_var.m4
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# SYNOPSIS
#
# MHD_APPEND_FLAG_TO_VAR([VARIABLE-TO-EXTEND], [FLAG-TO-APPEND])
#
# DESCRIPTION
#
# This macro sets VARIABLE-TO-EXTEND to the value of VARIABLE-TO-EXTEND with
# appended FLAG-TO-APPEND. If current value of VARIABLE-TO-EXTEND and
# FLAG-TO-APPEND are both non-empty strings then space is added between them.
#
# Example usage:
#
# MHD_APPEND_FLAG_TO_VAR([my_CFLAGS], [-Wall])
#
#
# LICENSE
#
# Copyright (c) 2022 Karlson2k (Evgeny Grin) <k2k@narod.ru>
#
# Copying and distribution of this file, with or without modification, are
# permitted in any medium without royalty provided the copyright notice
# and this notice are preserved. This file is offered as-is, without any
# warranty.
#serial 1
AC_DEFUN([MHD_APPEND_FLAG_TO_VAR],[dnl
m4_ifblank([$1],[m4_fatal([$0: First macro argument must not be empty])])dnl
m4_bmatch([$1], [\$], [m4_fatal([$0: First macro argument must not contain '$'])])dnl
m4_bmatch([$1], [,], [m4_fatal([$0: First macro argument must not contain ','])])dnl
m4_bmatch(_mhd_norm_expd([$1]), [\s],dnl
[m4_fatal([$0: First macro argument must not contain whitespaces])])dnl
m4_pushdef([varExtd],_mhd_norm_expd([$1]))dnl
m4_bmatch([$2],[\$],dnl
[dnl The second parameter is a variable value
AS_IF([test -z "_mhd_norm_expd([$2])"],dnl
[varExtd="${varExtd}"],dnl
[AS_IF([test -z "${varExtd}"],[varExtd="_mhd_norm_expd([$2])"],[varExtd="${varExtd} _mhd_norm_expd([$2])"])])
],dnl
[dnl The second parameter is not a variable value
m4_ifnblank(_mhd_norm_expd([$2]),dnl
[AS_IF([test -z "${varExtd}"],[varExtd="_mhd_norm_expd([$2])"],[varExtd="${varExtd} _mhd_norm_expd([$2])"])
],dnl
[m4_n([varExtd="${varExtd}"])])])dnl m4_ifnblank m4_bmatch
m4_popdef([varExtd])dnl
])dnl AC_DEFUN
m4/mhd_prepend_flag_to_var.m4
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# SYNOPSIS
#
# MHD_PREPEND_FLAG_TO_VAR([VARIABLE-TO-EXTEND], [FLAG-TO-PREPEND])
#
# DESCRIPTION
#
# This macro sets VARIABLE-TO-EXTEND to the value of VARIABLE-TO-EXTEND with
# appended FLAG-TO-APPEND. If current value of VARIABLE-TO-EXTEND and
# FLAG-TO-APPEND are both non-empty strings then space is added between them.
#
# Example usage:
#
# MHD_PREPEND_FLAG_TO_VAR([my_CFLAGS], [-Wall])
#
#
# LICENSE
#
# Copyright (c) 2022 Karlson2k (Evgeny Grin) <k2k@narod.ru>
#
# Copying and distribution of this file, with or without modification, are
# permitted in any medium without royalty provided the copyright notice
# and this notice are preserved. This file is offered as-is, without any
# warranty.
#serial 1
AC_DEFUN([MHD_PREPEND_FLAG_TO_VAR],[dnl
m4_ifblank([$1],[m4_fatal([$0: First macro argument must not be empty])])dnl
m4_bmatch([$1], [\$], [m4_fatal([$0: First macro argument must not contain '$'])])dnl
m4_bmatch([$1], [,], [m4_fatal([$0: First macro argument must not contain ','])])dnl
m4_bmatch(_mhd_norm_expd([$1]), [\s],dnl
[m4_fatal([$0: First macro argument must not contain whitespaces])])dnl
m4_pushdef([varExtd],_mhd_norm_expd([$1]))dnl
m4_bmatch([$2],[\$],dnl
[dnl The second parameter is a variable value
AS_IF([test -z "_mhd_norm_expd([$2])"],dnl
[varExtd="${varExtd}"],dnl
[AS_IF([test -z "${varExtd}"],[varExtd="_mhd_norm_expd([$2])"],[varExtd="_mhd_norm_expd([$2]) ${varExtd}"])])
],dnl
[dnl The second parameter is not a variable value
m4_ifnblank(_mhd_norm_expd([$2]),dnl
[AS_IF([test -z "${varExtd}"],[varExtd="_mhd_norm_expd([$2])"],[varExtd="_mhd_norm_expd([$2]) ${varExtd}"])
],dnl
[m4_n([varExtd="${varExtd}"])])])dnl m4_ifnblank m4_bmatch
m4_popdef([varExtd])dnl
])dnl AC_DEFUN