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perf jvmti: improve error message in Makefile 

This patch improves the error message given by jvmti Makefile when the
alternatives command cannot be found. It now suggests the user locates
the root of their Java installation and pass it with JDIR=

Signed-off-by: Stephane Eranian <eranian@google.com>
Cc: Adrian Hunter <adrian.hunter@intel.com>
Cc: Andi Kleen <ak@linux.intel.com>
Cc: Jiri Olsa <jolsa@redhat.com>
Cc: Kan Liang <kan.liang@intel.com>
Cc: Namhyung Kim <namhyung@kernel.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Link: http://lkml.kernel.org/r/1456378056-18812-1-git-send-email-eranian@google.com
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
This commit is contained in:
Stephane Eranian 2016-02-25 06:27:36 +01:00 committed by Arnaldo Carvalho de Melo
parent 5104ffb229
commit 7e9551bc72
1 changed files with 13 additions and 4 deletions
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17
tools/perf/jvmti/Makefile
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@ -35,12 +35,21 @@ SOLIBEXT=so
# The following works at least on fedora 23, you may need the next # The following works at least on fedora 23, you may need the next
# line for other distros. # line for other distros.
ifeq (,$(wildcard /usr/sbin/update-java-alternatives)) ifneq (,$(wildcard /usr/sbin/update-java-alternatives))
JDIR=$(shell alternatives --display java | tail -1 | cut -d' ' -f 5 | sed 's%/jre/bin/java.%%g')
else
JDIR=$(shell /usr/sbin/update-java-alternatives -l | head -1 | cut -d ' ' -f 3) JDIR=$(shell /usr/sbin/update-java-alternatives -l | head -1 | cut -d ' ' -f 3)
else
ifneq (,$(wildcard /usr/sbin/alternatives))
JDIR=$(shell alternatives --display java | tail -1 | cut -d' ' -f 5 | sed 's%/jre/bin/java.%%g')
endif
endif endif
ifndef JDIR
$(error Could not find alternatives command, you need to set JDIR= to point to the root of your Java directory)
else
ifeq (,$(wildcard $(JDIR)/include/jvmti.h))
$(error the openjdk development package appears to me missing, install and try again)
endif
endif
$(info Using Java from $(JDIR))
# -lrt required in 32-bit mode for clock_gettime() # -lrt required in 32-bit mode for clock_gettime()
LIBS=-lelf -lrt LIBS=-lelf -lrt
INCDIR=-I $(JDIR)/include -I $(JDIR)/include/linux INCDIR=-I $(JDIR)/include -I $(JDIR)/include/linux