path: root/linux
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authorGravatar Yann E. MORIN <yann.morin.1998@free.fr>2016-03-11 19:19:54 +0100
committerGravatar Thomas Petazzoni <thomas.petazzoni@free-electrons.com>2016-03-19 14:37:17 +0100
commitc306e0493a6e271ec5eab403958b2820635b8894 (patch)
treee9e237c8f2f7b8b792af70ede3a90a051cdecfe8 /linux
parentbfc68dba9238e6853270a7cc4b75e1c73994cf58 (diff)
linux/perf: really do not build the documentation
The perf buildsystem, inside the kernel, is not really amenable to be easily used... Regarding the documentation, it will forcefully try to detect asciidoc and, with the latest versions, xmlto, completely disregarding what the user may provide. We currently pass ASCIIDOC= (the empty string) on the make command line, as an attempt to disable building the documentation, but that has no effect whatsoever on perf: that variable is not passed down to the sub-sub-make (yes, a two-level depth) that is responsible for building the documentation. We really do not want to build any of the documentation (the user can refer to the documentation on his own development machine), so we use a little dirty trick: we provide a GNUmakefile beside the existing Makefile for the documentation; GNUmakefile always takes precedence over a Makefile when both are present. We only provide a catch-all-no-recipe rule in that GNUmakefile, so it really does nothing useful, except avoid building the documentation. Signed-off-by: "Yann E. MORIN" <yann.morin.1998@free.fr> Cc: Thomas De Schampheleire <patrickdepinguin@gmail.com> Signed-off-by: Thomas Petazzoni <thomas.petazzoni@free-electrons.com>
Diffstat (limited to 'linux')
1 files changed, 14 insertions, 2 deletions
diff --git a/linux/linux-tool-perf.mk b/linux/linux-tool-perf.mk
index 1070a1c098..f9b295fb13 100644
--- a/linux/linux-tool-perf.mk
+++ b/linux/linux-tool-perf.mk
@@ -24,8 +24,7 @@ PERF_MAKE_FLAGS = \
prefix=/usr \
- WERROR=0 \
# We need to pass an argument to ld for setting the endianness when
# building it for MIPS architecture, otherwise the default one will
@@ -68,6 +67,19 @@ else
+# We really do not want to build the perf documentation, because it
+# has stringent requirement on the documentation generation tools,
+# like xmlto and asciidoc), which may be lagging behind on some
+# distributions.
+# We name it 'GNUmakefile' so that GNU make will use it instead of
+# the existing 'Makefile'.
+ if [ -f $(@D)/tools/perf/Documentation/Makefile ]; then \
+ printf "%%:\n\t@:\n" >$(@D)/tools/perf/Documentation/GNUmakefile; \
+ fi
# O must be redefined here to overwrite the one used by Buildroot for
# out of tree build. We build perf in $(@D)/tools/perf/ and not just
# $(@D) so that it isn't built in the root directory of the kernel