mhd_prepend_flag_to_var.m4 (1739B)
1 # SYNOPSIS 2 # 3 # MHD_PREPEND_FLAG_TO_VAR([VARIABLE-TO-EXTEND], [FLAG-TO-PREPEND]) 4 # 5 # DESCRIPTION 6 # 7 # This macro sets VARIABLE-TO-EXTEND to the value of VARIABLE-TO-EXTEND with 8 # appended FLAG-TO-APPEND. If current value of VARIABLE-TO-EXTEND and 9 # FLAG-TO-APPEND are both non-empty strings then space is added between them. 10 # 11 # Example usage: 12 # 13 # MHD_PREPEND_FLAG_TO_VAR([my_CFLAGS], [-Wall]) 14 # 15 # 16 # LICENSE 17 # 18 # Copyright (c) 2022 Karlson2k (Evgeny Grin) <k2k@narod.ru> 19 # 20 # Copying and distribution of this file, with or without modification, are 21 # permitted in any medium without royalty provided the copyright notice 22 # and this notice are preserved. This file is offered as-is, without any 23 # warranty. 24 25 #serial 2 26 27 AC_DEFUN([MHD_PREPEND_FLAG_TO_VAR],[dnl 28 m4_ifblank([$1],[m4_fatal([$0: First macro argument must not be empty])])dnl 29 m4_bmatch([$1], [\$], [m4_fatal([$0: First macro argument must not contain '$'])])dnl 30 m4_bmatch([$1], [,], [m4_fatal([$0: First macro argument must not contain ','])])dnl 31 m4_bmatch(_mhd_norm_expd([$1]), [\s],dnl 32 [m4_fatal([$0: First macro argument must not contain whitespaces])])dnl 33 m4_pushdef([varExtd],_mhd_norm_expd([$1]))dnl 34 m4_bmatch([$2],[\$],dnl 35 [dnl The second parameter is a variable value 36 AS_IF([test -z "_mhd_norm_expd([$2])"],dnl 37 [varExtd="${varExtd}"],dnl 38 [test -z "${varExtd}"],dnl 39 [varExtd="_mhd_norm_expd([$2])"],dnl 40 [varExtd="_mhd_norm_expd([$2]) ${varExtd}"]) 41 ],dnl 42 [dnl The second parameter is not a variable value 43 m4_ifnblank(_mhd_norm_expd([$2]),dnl 44 [AS_IF([test -z "${varExtd}"],[varExtd="_mhd_norm_expd([$2])"],[varExtd="_mhd_norm_expd([$2]) ${varExtd}"]) 45 ],dnl 46 [m4_n([varExtd="${varExtd}"])])])dnl m4_ifnblank m4_bmatch 47 m4_popdef([varExtd])dnl 48 ])dnl AC_DEFUN