[libvirt] [PATCH] maint: detect VPATH builds when checking for gnulib update

I accidentally typed 'make' in the srcdir of a VPATH build, and was surprised to see this: $ make /bin/sh: s/^[ +-]//;s/ .*//: No such file or directory INFO: gnulib update required; running ./autogen.sh first make: -n: Command not found ./autogen.sh I am going to run ./configure with no arguments - if you wish to pass any to it, please specify them on the ./autogen.sh command line. running bootstrap... ./bootstrap: Bootstrapping from checked-out libvirt sources... ./bootstrap: getting gnulib files... Oops - we're trying to execute some fairly bogus command names, and then trying to configure in-tree (which breaks all existing VPATH builds, since automake refuses to do a VPATH build if it detects an in-tree configure). The third line (executing "-n") is fixed by updating to the latest gnulib; the rest of the problem is fixed by copying the same filtering in our cfg.mk as what gnulib just added, so that we avoid any $(shell) invocations which in turn depend on variables that are only populated by a working Makefile. With that in place, we are back to the much nicer: $ make There seems to be no Makefile in this directory. You must run ./configure before running 'make'. make: *** [abort-due-to-no-makefile] Error 1 Additionally, although harder to see - there was a trailing space in the message warning us that autogen would run an in-tree configure. * .gnulib: Update to latest, in part for maint.mk improvements. * cfg.mk (_update_required): Don't check for update in unconfigured directory. * autogen.sh (no_git): Drop trailing space. Signed-off-by: Eric Blake <eblake(a)redhat.com&gt; --- Pushing under the gnulib maintenance rule. * .gnulib e8e0eb6...d55899f (35): .gnulib | 2 +- autogen.sh | 2 +- cfg.mk | 4 ++++ 3 files changed, 6 insertions(+), 2 deletions(-) diff --git a/.gnulib b/.gnulib index e8e0eb6..d55899f 160000 --- a/.gnulib +++ b/.gnulib @@ -1 +1 @@ -Subproject commit e8e0eb6bfb728685ec8d5afd924e41b18e9d928d +Subproject commit d55899fd2c5794ac85ecb14d5e2f646a89e4b4dd diff --git a/autogen.sh b/autogen.sh index 5aa1990..1965f64 100755 --- a/autogen.sh +++ b/autogen.sh @@ -35,7 +35,7 @@ if test -z "$NOCONFIGURE" ; then echo "Running ./configure with $EXTRA_ARGS $@" else if test -z "$*" && test ! -f "$THEDIR/config.status"; then - echo "I am going to run ./configure with no arguments - if you wish " + echo "I am going to run ./configure with no arguments - if you wish" echo "to pass any to it, please specify them on the $0 command line." fi fi diff --git a/cfg.mk b/cfg.mk index 4601b35..b5f1fa2 100644 --- a/cfg.mk +++ b/cfg.mk @@ -939,6 +939,7 @@ sc_require_locale_h: # We don't use this feature of maint.mk. prev_version_file = /dev/null +ifneq ($(_gl-Makefile),) ifeq (0,$(MAKELEVEL)) _curr_status = .git-module-status # The sed filter accommodates those who check out on a commit from which @@ -971,6 +972,7 @@ ifeq (0,$(MAKELEVEL)) maint.mk Makefile: _autogen endif endif +endif # It is necessary to call autogen any time gnulib changes. Autogen # reruns configure, then we regenerate all Makefiles at once. @@ -980,7 +982,9 @@ _autogen: ./config.status # regenerate HACKING as part of the syntax-check +ifneq ($(_gl-Makefile),) syntax-check: $(top_srcdir)/HACKING bracket-spacing-check +endif bracket-spacing-check: $(AM_V_GEN)files=`$(VC_LIST) | grep '\.c$$'`; \ -- 1.9.3