[libvirt] [PATCH] autogen.sh: tell user the correct make command
When autogen.sh finishes it helpfully prints "Now type 'make' to compile libvirt." which is fine if on a host with GNU make, but on *BSD running 'make' will end in tears. We should tell users to run 'gmake' on these platforms. If 'gmake' doesn't exist then we should report an error too "GNU make is required to build libvirt" Signed-off-by: Daniel P. Berrange <berrange@redhat.com> --- autogen.sh | 19 ++++++++++++++++++- 1 file changed, 18 insertions(+), 1 deletion(-) diff --git a/autogen.sh b/autogen.sh index d5d836a..1e99ce8 100755 --- a/autogen.sh +++ b/autogen.sh @@ -193,4 +193,21 @@ else fi echo -echo "Now type 'make' to compile libvirt." + +# Make sure we can find GNU make and tell the user +# the right command to run +make -v | grep "GNU Make" 1>/dev/null 2>&1 +if test $? = 0 +then + MAKE=make +else + which gmake 1>/dev/null 2>&1 + if test $? = 0 + then + MAKE=gmake + else + die "GNU make is required to build libvirt" + fi +fi + +echo "Now type '$MAKE' to compile libvirt." -- 2.9.4
On Tue, 2017-07-04 at 16:22 +0100, Daniel P. Berrange wrote:
When autogen.sh finishes it helpfully prints "Now type 'make' to compile libvirt." which is fine if on a host with GNU make, but on *BSD running 'make' will end in tears. We should tell users to run 'gmake' on these platforms. If 'gmake' doesn't exist then we should report an error too "GNU make is required to build libvirt" Signed-off-by: Daniel P. Berrange <berrange@redhat.com> --- autogen.sh | 19 ++++++++++++++++++- 1 file changed, 18 insertions(+), 1 deletion(-) diff --git a/autogen.sh b/autogen.sh index d5d836a..1e99ce8 100755 --- a/autogen.sh +++ b/autogen.sh @@ -193,4 +193,21 @@ else fi echo
I'd move this 'echo' to the bottom as well.
-echo "Now type 'make' to compile libvirt." + +# Make sure we can find GNU make and tell the user +# the right command to run +make -v | grep "GNU Make" 1>/dev/null 2>&1
This doesn't catch stderr for the make invocation, and FreeBSD's make doesn't support the -v flag so you'll end up with a bunch of spurious output. You can use make -v 2>&1 | grep -q "GNU Make" instead.
+if test $? = 0
You're not using $? for anything else, so you can just have the command above as condition for 'if'.
+then
The rest of the file puts 'then' on the same line as 'if', please keep it consistent.
+ MAKE=make +else + which gmake 1>/dev/null 2>&1 + if test $? = 0 + then
Same comments as above. Additionally, you don't need to mention fd 1 explicitly when redirecting stdout, just '>/dev/null' is enough and looks less weird. -- Andrea Bolognani / Red Hat / Virtualization
On 07/05/2017 11:32 AM, Andrea Bolognani wrote:
On Tue, 2017-07-04 at 16:22 +0100, Daniel P. Berrange wrote:
When autogen.sh finishes it helpfully prints
"Now type 'make' to compile libvirt."
which is fine if on a host with GNU make, but on *BSD running 'make' will end in tears. We should tell users to run 'gmake' on these platforms. If 'gmake' doesn't exist then we should report an error too
"GNU make is required to build libvirt"
Signed-off-by: Daniel P. Berrange <berrange@redhat.com> ---
+ +# Make sure we can find GNU make and tell the user +# the right command to run +make -v | grep "GNU Make" 1>/dev/null 2>&1
In fact, gnulib's bootstrap script is already able to enforce prerequisites, look for buildreq= in bootstrap.conf. But I don't know if it is smart enough to make it easy to state that a project depends on GNU make (not all projects have that dependency, but we do) - so maybe it's worth hoisting the detection of an adequate (GNU) make into gnulib's bootstrap script.
This doesn't catch stderr for the make invocation, and FreeBSD's make doesn't support the -v flag so you'll end up with a bunch of spurious output. You can use
make -v 2>&1 | grep -q "GNU Make"
Yes, that is indeed important, if you like scraping help output. But it may be better to test some other GNU-only functionality instead of just scraping output (features, not versions, is always better when it comes to probing for sufficient support) - the question is whether that can be done in an equally compact manner. Is it worth cc'ing the gnulib list for thoughts on incorporating the notion of "this project requires GNU make" into the $buildreq handling of bootstrap? -- Eric Blake, Principal Software Engineer Red Hat, Inc. +1-919-301-3266 Virtualization: qemu.org | libvirt.org
On Wed, 2017-07-05 at 13:06 -0500, Eric Blake wrote:
This doesn't catch stderr for the make invocation, and FreeBSD's make doesn't support the -v flag so you'll end up with a bunch of spurious output. You can use make -v 2>&1 | grep -q "GNU Make" Yes, that is indeed important, if you like scraping help output. But it may be better to test some other GNU-only functionality instead of just scraping output (features, not versions, is always better when it comes to probing for sufficient support) - the question is whether that can be done in an equally compact manner.
I think we're using a bunch of construct that can only be found in GNU make, so while having a more fine-grained capability check would future-proof us in case (Free)BSD make decides to implement the same features down the line it's quite possibly more trouble than it's worth.
Is it worth cc'ing the gnulib list for thoughts on incorporating the notion of "this project requires GNU make" into the $buildreq handling of bootstrap?
That sounds good. Not sure whether we should wait until that's implemented or merge this (fixed) patch right away and rewrite it in terms of gnulib's make detection once that's available, though. -- Andrea Bolognani / Red Hat / Virtualization
On Wed, Jul 05, 2017 at 06:32:07PM +0200, Andrea Bolognani wrote:
On Tue, 2017-07-04 at 16:22 +0100, Daniel P. Berrange wrote:
When autogen.sh finishes it helpfully prints "Now type 'make' to compile libvirt." which is fine if on a host with GNU make, but on *BSD running 'make' will end in tears. We should tell users to run 'gmake' on these platforms. If 'gmake' doesn't exist then we should report an error too "GNU make is required to build libvirt" Signed-off-by: Daniel P. Berrange <berrange@redhat.com> --- autogen.sh | 19 ++++++++++++++++++- 1 file changed, 18 insertions(+), 1 deletion(-) diff --git a/autogen.sh b/autogen.sh index d5d836a..1e99ce8 100755 --- a/autogen.sh +++ b/autogen.sh @@ -193,4 +193,21 @@ else fi echo
I'd move this 'echo' to the bottom as well.
-echo "Now type 'make' to compile libvirt." + +# Make sure we can find GNU make and tell the user +# the right command to run +make -v | grep "GNU Make" 1>/dev/null 2>&1
This doesn't catch stderr for the make invocation, and FreeBSD's make doesn't support the -v flag so you'll end up with a bunch of spurious output. You can use
make -v 2>&1 | grep -q "GNU Make"
instead.
+if test $? = 0
You're not using $? for anything else, so you can just have the command above as condition for 'if'.
+then
The rest of the file puts 'then' on the same line as 'if', please keep it consistent.
+ MAKE=make +else + which gmake 1>/dev/null 2>&1
also I believe `which` is not POSIX-guaranteed, you should use `type` instead.
+ if test $? = 0 + then
Same comments as above. Additionally, you don't need to mention fd 1 explicitly when redirecting stdout, just '>/dev/null' is enough and looks less weird.
-- Andrea Bolognani / Red Hat / Virtualization
-- libvir-list mailing list libvir-list@redhat.com https://www.redhat.com/mailman/listinfo/libvir-list
participants (4)
-
Andrea Bolognani -
Daniel P. Berrange -
Eric Blake -
Martin Kletzander