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perf: Auto-detect libelf 

Adds autodetection for libelf as well, and simplifies the
libbfd code. Furthermore, fail make with an error when libelf
is not found and warn about the lack of libbfd.

Also provide an option to build a 32bit version even though you
might be running a 64bit kernel.

Signed-off-by: Peter Zijlstra <a.p.zijlstra@chello.nl>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
This commit is contained in:
Peter Zijlstra 2009-08-05 14:05:16 +02:00 committed by Ingo Molnar
parent 4d1e00a8af
commit 9424edc2da
1 changed files with 11 additions and 4 deletions
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15
tools/perf/Makefile
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@ -158,8 +158,10 @@ uname_P := $(shell sh -c 'uname -p 2>/dev/null || echo not')
uname_V := $(shell sh -c 'uname -v 2>/dev/null || echo not')
# If we're on a 64-bit kernel, use -m64
ifneq ($(patsubst %64,%,$(uname_M)),$(uname_M))
M64 := -m64
ifndef NO_64BIT
ifneq ($(patsubst %64,%,$(uname_M)),$(uname_M))
M64 := -m64
endif
endif
# CFLAGS and LDFLAGS are for the users to override from the command line.
@ -373,19 +375,24 @@ ifeq ($(uname_S),Darwin)
PTHREAD_LIBS =
endif
ifneq ($(shell sh -c "(echo '\#include <libelf.h>'; echo 'int main(void) { Elf * elf = elf_begin(0, ELF_C_READ_MMAP, 0); return (long)elf; }') | $(CC) -x c - $(ALL_CFLAGS) -D_LARGEFILE64_SOURCE -D_FILE_OFFSET_BITS=64 -o /dev/null $(ALL_LDFLAGS) > /dev/null 2>&1 && echo y"), y)
msg := $(error No libelf.h/libelf found, please install libelf-dev/elfutils-libelf-devel);
endif
ifdef NO_DEMANGLE
BASIC_CFLAGS += -DNO_DEMANGLE
else
has_bfd := $(shell sh -c "(echo '\#include <stdio.h>'; echo '\#include <bfd.h>'; echo '\#ifndef DMGL_PARAMS'; echo '\#define DMGL_PARAMS (1 << 0)'; echo '\#define DMGL_ANSI (1 << 1)'; echo '\#endif'; echo 'int main(int argc, char **argv) { bfd_demangle(NULL, argv[0], DMGL_PARAMS | DMGL_ANSI); return 0; }') | gcc -x c - -lbfd > /dev/null 2>&1 && echo y")
has_bfd := $(shell sh -c "(echo '\#include <bfd.h>'; echo 'int main(void) { bfd_demangle(0, 0, 0); return 0; }') | $(CC) -x c - $(ALL_CFLAGS) -o /dev/null $(ALL_LDFLAGS) -lbfd > /dev/null 2>&1 && echo y")
has_bfd_iberty := $(shell sh -c "(echo '\#include <stdio.h>'; echo '\#include <bfd.h>'; echo '\#ifndef DMGL_PARAMS'; echo '\#define DMGL_PARAMS (1 << 0)'; echo '\#define DMGL_ANSI (1 << 1)'; echo '\#endif'; echo 'int main(int argc, char **argv) { bfd_demangle(NULL, argv[0], DMGL_PARAMS | DMGL_ANSI); return 0; }') | gcc -x c - -lbfd -liberty > /dev/null 2>&1 && echo y")
has_bfd_iberty := $(shell sh -c "(echo '\#include <bfd.h>'; echo 'int main(void) { bfd_demangle(0, 0, 0); return 0; }') | $(CC) -x c - $(ALL_CFLAGS) -o /dev/null $(ALL_LDFLAGS) -lbfd -liberty > /dev/null 2>&1 && echo y")
ifeq ($(has_bfd),y)
EXTLIBS += -lbfd
else ifeq ($(has_bfd_iberty),y)
EXTLIBS += -lbfd -liberty
else
msg := $(warning No bfd.h/libbfd found, install binutils-dev[el] to gain symbol demangling)
BASIC_CFLAGS += -DNO_DEMANGLE
endif
endif