openocd/config_subdir.m4
R. Diez 6e92cd0642 Remove compatibility macros m4_ifblank and m4_ifnblank
They are at least since Autoconf 2.67 present,
and we are requiring version 2.69.

Change-Id: I41b33d4ebe02198f03cdddcc4a3c1beedd993d78
Signed-off-by: R. Diez <rdiezmail-openocd@yahoo.de>
Reviewed-on: http://openocd.zylin.com/6239
Tested-by: jenkins
Reviewed-by: Antonio Borneo <borneo.antonio@gmail.com>
2021-05-22 10:07:52 +01:00

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dnl AC_CONFIG_SUBDIRS does not allow configure options to be passed
dnl to subdirs, this function allows that by creating a configure.gnu
dnl script that prepends configure options and then calls the real
dnl configure script
AC_DEFUN([AX_CONFIG_SUBDIR_OPTION],
[
AC_CONFIG_SUBDIRS([$1])
m4_ifblank([$2], [rm -f $srcdir/$1/configure.gnu],
[echo -e '#!/bin/sh\nexec "`dirname "'\$'0"`/configure" $2 "'\$'@"' > "$srcdir/$1/configure.gnu"
])
])