Makefile: expose target 'graph-build' to generate the build-time graphs

Generate the build-time graphs by calling:
    make graph-build

This generates the graphs in $(O)/graphs/

It is possible to use the alternate color-scheme by setting the variable
GRAPH_ALT=1 on the command line:
    make GRAPH_ALT=1 graph-build

Signed-off-by: "Yann E. MORIN" <yann.morin.1998@free.fr>
Cc: Thomas Petazzoni <thomas.petazzoni@free-electrons.com>
Signed-off-by: Thomas Petazzoni <thomas.petazzoni@free-electrons.com>

diff --git a/Makefile b/Makefile
index 3190541a113f132d338f6d75562992836f4e29b4..98ca7980f447e0a766d422a19faebc121e29c253 100644 (file)
--- a/Makefile
+++ b/Makefile
@@ -631,6 +631,17 @@ legal-info: dirs legal-info-clean legal-info-prepare $(TARGETS_LEGAL_INFO) \
 show-targets:
        @echo $(TARGETS)
 
+graph-build: $(O)/build/build-time.log
+       @install -d $(O)/graphs
+       $(foreach o,name build duration,./support/scripts/graph-build-time \
+                                       --type=histogram --order=$(o) --input=$(<) \
+                                       --output=$(O)/graphs/build.hist-$(o).pdf \
+                                       $(if $(GRAPH_ALT),--alternate-colors)$(sep))
+       $(foreach t,packages steps,./support/scripts/graph-build-time \
+                                  --type=pie-$(t) --input=$(<) \
+                                  --output=$(O)/graphs/build.pie-$(t).pdf \
+                                  $(if $(GRAPH_ALT),--alternate-colors)$(sep))
+
 else # ifeq ($(BR2_HAVE_DOT_CONFIG),y)
 
 all: menuconfig
@@ -843,6 +854,7 @@ endif
        @echo '  manual-pdf             - build manual in PDF'
        @echo '  manual-text            - build manual in text'
        @echo '  manual-epub            - build manual in ePub'
+       @echo '  graph-build            - generate graphs of the build times'
        @echo
        @echo 'Miscellaneous:'
        @echo '  source                 - download all sources needed for offline-build'

diff --git a/docs/manual/common-usage.txt b/docs/manual/common-usage.txt
index 1290dfc1b7f72912e93acdd71bc89e802f6ab89f..7c7694265f0ca0187db59974c178ad5ee185070c 100644 (file)
--- a/docs/manual/common-usage.txt
+++ b/docs/manual/common-usage.txt
@@ -86,6 +86,8 @@ to +make+ or set in the environment:
   Note that the Buildroot download directory can also be set from the
   configuration interface, so through the Buildroot +.config+ file; this
   is the recommended way of setting it.
+* +GRAPH_ALT+, if set and non-empty, to use an alternate color-scheme in
+  build-time graphs
 
 An example that uses config files located in the toplevel directory and
 in your $HOME: