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author | Joel Sherrill <joel.sherrill@OARcorp.com> | 2001-11-14 18:57:26 +0000 |
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committer | Joel Sherrill <joel.sherrill@OARcorp.com> | 2001-11-14 18:57:26 +0000 |
commit | 7ee86ba746e7109824a07a056877f7b48d05e910 (patch) | |
tree | db382bcfeb21bb48515b520ef54832ed71899def /aclocal | |
parent | 2001-11-10 Ralf Corsepius <corsepiu@faw.uni-ulm.de> (diff) | |
download | rtems-7ee86ba746e7109824a07a056877f7b48d05e910.tar.bz2 |
2001-11-14 Ralf Corsepius <corsepiu@faw.uni-ulm.de>
* aclocal/bspopts.m4: New file.
Diffstat (limited to 'aclocal')
-rw-r--r-- | aclocal/bspopts.m4 | 66 |
1 files changed, 66 insertions, 0 deletions
diff --git a/aclocal/bspopts.m4 b/aclocal/bspopts.m4 new file mode 100644 index 0000000000..e7ba131ae5 --- /dev/null +++ b/aclocal/bspopts.m4 @@ -0,0 +1,66 @@ +dnl $Id$ +dnl + +dnl RTEMS_BSPOPTS_* - some autoconf voodoo to handle default values and +dnl help-strings for per-BSP-environment variables. + +dnl To be used in bsp-configure scripts + + +dnl Example: +dnl +dnl RTEMS_BSPOPTS_SET([foo],[bar],[0]) +dnl RTEMS_BSPOPTS_SET([foo],[baz*],[hello]) +dnl RTEMS_BSPOPTS_SET([foo],[*],[]) +dnl RTEMS_BSPOPTS_HELP([foo],[env. variable foo]) +dnl -> Add "0" as default value of variable "foo" for BSP "bar" +dnl -> Add "hello" as default value of variable "foo" for all BSPs starting +dnl with "baz" in their name. +dnl -> Undefine foo as default clause for all BSP's. +dnl +dnl All this basically expands to a /bin/shell "case"-statement with +dnl accompanying autoconf magic to propagate VAR to bspopts.h. + + +dnl RTEMS_BSPOPTS_HELP(VAR,HELP-STRING) +dnl Set up printing the HELP-STRING for bspopts.h's variable VAR and add +dnl appropriate /bin/sh-magic to "configure" to have VAR set up. + +AC_DEFUN([RTEMS_BSPOPTS_HELP],[ +RTEMS_ARG_VAR([$1],[$2]) +m4_ifdef([_$1],[ +case ${RTEMS_BSP} in +_$1[]dnl +esac],[]) +if test -n "[$]{$1}"; then[]dnl +AC_DEFINE_UNQUOTED([$1], + [[$]$1], + [$2])dnl +fi +]) + +dnl RTEMS_BSPOPTS_SET(VAR,BSP,DEFAULT) +dnl Set up a value DEFAULT to be used as default value for variable VAR for +dnl BSP in RTEMS_BSPOPTS_HELP. + +dnl MUST be use in front of exactly _one_ corresponding RTEMS_BSPOPTS_HELP + +AC_DEFUN([RTEMS_BSPOPTS_SET],[dnl +m4_append([_$1], +[$2 ) + $1=[$]{$1-$3} ;; +]) +]) + + +dnl RTEMS_ARG_VAR(VAR,HELP-STRING) +dnl An internal macros to have RTEMS_BSPOPTS_HELP's help string pretty +dnl printed with configure --help. +dnl Stripped down version of autoconf-2.52's AC_ARG_VAR. + +AC_DEFUN([RTEMS_ARG_VAR], +[ +m4_expand_once([m4_divert_once([HELP_VAR], +[AC_HELP_STRING([$1], [$2], [ ])])], + [$0($1)])dnl +]) |