diff options
Diffstat (limited to 'lib/am/header-vars.am')
| -rw-r--r-- | lib/am/header-vars.am | 43 |
1 files changed, 28 insertions, 15 deletions
diff --git a/lib/am/header-vars.am b/lib/am/header-vars.am index 8295a9994..23c627ed2 100644 --- a/lib/am/header-vars.am +++ b/lib/am/header-vars.am @@ -39,23 +39,36 @@ am__is_gnu_make = test -n '$(MAKEFILE_LIST)' && test -n '$(MAKELEVEL)' am__make_dryrun = \ { \ am__dry=no; \ - case $$MAKEFLAGS in \ -## If we run "make TESTS='snooze nap'", GNU make will export MAKEFLAGS -## to "TESTS=foo\ nap", so that the simpler loop below (on word-splitted + if $(am__is_gnu_make); then \ +## GNU make: $(MAKEFLAGS) is quite tricky there, and the older +## $(MFLAGS) variable behaves much better. + for am__flg in $$MFLAGS; do \ + case $$am__flg in \ + *=*|--*) ;; \ + -*n*) am__dry=yes; break;; \ + esac; \ + done; \ + else \ +## Non-GNU make: we must rely on $(MAKEFLAGS). This is tricky and brittle, +## but is the best we can do. + case $$MAKEFLAGS in \ +## If we run "make TESTS='snooze nap'", FreeBSD make will export MAKEFLAGS +## to " TESTS=foo\ nap", so that the simpler loop below (on word-splitted ## $$MAKEFLAGS) would see a "make flag" equal to "nap", and would wrongly ## misinterpret that as and indication that make is running in dry mode. -## This has already happened in practice. So we need this hack. - *\\[\ \ ]*) \ - echo 'am--echo: ; @echo "AM" OK' | $(MAKE) -f - 2>/dev/null \ - | grep '^AM OK$$' >/dev/null || am__dry=yes;; \ - *) \ - for am__flg in $$MAKEFLAGS; do \ - case $$am__flg in \ - *=*|--*) ;; \ - *n*) am__dry=yes; break;; \ - esac; \ - done;; \ - esac; \ +## This has already happened in practice. So we need this unpleasant hack. + *\\[\ \ ]*) \ + echo 'am--echo: ; @echo "AM" OK' | $(MAKE) -f - 2>/dev/null \ + | grep '^AM OK$$' >/dev/null || am__dry=yes ;; \ + *) \ + for am__flg in $$MAKEFLAGS; do \ + case $$am__flg in \ + *=*|--*) ;; \ + *n*) am__dry=yes; break;; \ + esac; \ + done ;;\ + esac; \ + fi; \ test $$am__dry = yes; \ } |