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authorGravatar Thomas Petazzoni <thomas.petazzoni@free-electrons.com>2014-06-13 14:17:19 +0200
committerGravatar Peter Korsgaard <peter@korsgaard.com>2014-06-13 14:59:52 +0200
commit664f2707246a53669f91a83d9cc094c26e3848f3 (patch)
treeb58ad77547b7abd2f6bedfe5893a09f359f00a33 /Makefile
parent5c8526691cb3667fe83992b94075c8c5fecc4f2e (diff)
downloadbuildroot-664f2707246a53669f91a83d9cc094c26e3848f3.tar.gz
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Makefile: test if dot exists before using it in graph-depends
The 'graph-depends' logic uses the 'dot' program from Graphviz to draw the dependency graph, but it doesn't check its existence before starting the generation of the graph, which can lead to user confusion as reported in: http://lists.busybox.net/pipermail/buildroot/2014-June/099278.html With this commit, we first test if the 'dot' program is available, and if it's not, we error out with a clear error message: $ make graph-depends ERROR: The 'dot' program from Graphviz is needed for graph-depends make: *** [graph-depends] Error 1 [Peter: send error message to stderr instead] Reported-by: Dallas Clement <dallas.a.clement@gmail.com> Cc: Dallas Clement <dallas.a.clement@gmail.com> Cc: Yann E. MORIN <yann.morin.1998@free.fr> Signed-off-by: Thomas Petazzoni <thomas.petazzoni@free-electrons.com> Signed-off-by: Peter Korsgaard <peter@korsgaard.com>
Diffstat (limited to 'Makefile')
-rw-r--r--Makefile2
1 files changed, 2 insertions, 0 deletions
diff --git a/Makefile b/Makefile
index 55010687bf..14fca2b3d5 100644
--- a/Makefile
+++ b/Makefile
@@ -674,6 +674,8 @@ graph-build: $(O)/build/build-time.log
$(if $(BR2_GRAPH_ALT),--alternate-colors)$(sep))
graph-depends:
+ @dot -? >/dev/null 2>&1 || \
+ (echo "ERROR: The 'dot' program from Graphviz is needed for graph-depends" >&2; exit 1)
@$(INSTALL) -d $(O)/graphs
@cd "$(CONFIG_DIR)"; \
$(TOPDIR)/support/scripts/graph-depends $(BR2_GRAPH_DEPS_OPTS) \