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perf build: Use pkg-config for feature check for libtrace{event,fs}

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Needed to add required include directories for the feature detection
to succeed. The header tracefs.h is installed either into the include
directory /usr/include/tracefs/tracefs.h when using the Makefile, or
into /usr/include/libtracefs/tracefs.h when using meson to build
libtracefs. The header tracefs.h uses #include <event-parse.h> from
libtraceevent, so pkg-config needs to pick the correct include directory
for libtracefs and add the one for libtraceevent to succeed.

Note that in baa2ca59ec the variable
LIBTRACEEVENT_DIR was introduced, and now the method to compile against
non-standard locations requires PKG_CONFIG_PATH to be set instead, which
works for both libtraceevent and libtracefs.

Signed-off-by: Guilherme Amadio <amadio@gentoo.org>
Reviewed-by: Leo Yan <leo.yan@arm.com>
Signed-off-by: Namhyung Kim <namhyung@kernel.org>
Link: https://lore.kernel.org/r/20240606153625.2255470-2-amadio@gentoo.org
This commit is contained in:
Guilherme Amadio 2024-06-06 17:33:01 +02:00 committed by Namhyung Kim
parent 5518063fcb
commit 0f0e1f4456
2 changed files with 14 additions and 15 deletions
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2
tools/build/feature/test-libtracefs.c
View File

@ -1,5 +1,5 @@
// SPDX-License-Identifier: GPL-2.0
#include <tracefs/tracefs.h>
#include <tracefs.h>
int main(void)
{

27
tools/perf/Makefile.config
View File

@ -183,14 +183,12 @@ FEATURE_CHECK_CFLAGS-libzstd := $(LIBZSTD_CFLAGS)
FEATURE_CHECK_LDFLAGS-libzstd := $(LIBZSTD_LDFLAGS)
# for linking with debug library, run like:
# make DEBUG=1 LIBTRACEEVENT_DIR=/opt/libtraceevent/
TRACEEVENTLIBS := -ltraceevent
ifdef LIBTRACEEVENT_DIR
LIBTRACEEVENT_CFLAGS := -I$(LIBTRACEEVENT_DIR)/include
LIBTRACEEVENT_LDFLAGS := -L$(LIBTRACEEVENT_DIR)/lib
endif
FEATURE_CHECK_CFLAGS-libtraceevent := $(LIBTRACEEVENT_CFLAGS)
FEATURE_CHECK_LDFLAGS-libtraceevent := $(LIBTRACEEVENT_LDFLAGS) $(TRACEEVENTLIBS)
# make DEBUG=1 PKG_CONFIG_PATH=/opt/libtraceevent/(lib|lib64)/pkgconfig
FEATURE_CHECK_CFLAGS-libtraceevent := $(shell $(PKG_CONFIG) --cflags libtraceevent)
FEATURE_CHECK_LDFLAGS-libtraceevent := $(shell $(PKG_CONFIG) --libs libtraceevent)
FEATURE_CHECK_CFLAGS-libtracefs := $(shell $(PKG_CONFIG) --cflags libtracefs)
FEATURE_CHECK_LDFLAGS-libtracefs := $(shell $(PKG_CONFIG) --libs libtracefs)
FEATURE_CHECK_CFLAGS-bpf = -I. -I$(srctree)/tools/include -I$(srctree)/tools/arch/$(SRCARCH)/include/uapi -I$(srctree)/tools/include/uapi
# include ARCH specific config
@ -1178,10 +1176,10 @@ endif
ifneq ($(NO_LIBTRACEEVENT),1)
$(call feature_check,libtraceevent)
ifeq ($(feature-libtraceevent), 1)
CFLAGS += -DHAVE_LIBTRACEEVENT $(LIBTRACEEVENT_CFLAGS)
LDFLAGS += $(LIBTRACEEVENT_LDFLAGS)
EXTLIBS += ${TRACEEVENTLIBS}
LIBTRACEEVENT_VERSION := $(shell PKG_CONFIG_PATH=$(LIBTRACEEVENT_DIR) $(PKG_CONFIG) --modversion libtraceevent)
CFLAGS += -DHAVE_LIBTRACEEVENT
LDFLAGS += $(shell $(PKG_CONFIG) --libs-only-L libtraceevent)
EXTLIBS += $(shell $(PKG_CONFIG) --libs-only-l libtraceevent)
LIBTRACEEVENT_VERSION := $(shell $(PKG_CONFIG) --modversion libtraceevent)
LIBTRACEEVENT_VERSION_1 := $(word 1, $(subst ., ,$(LIBTRACEEVENT_VERSION)))
LIBTRACEEVENT_VERSION_2 := $(word 2, $(subst ., ,$(LIBTRACEEVENT_VERSION)))
LIBTRACEEVENT_VERSION_3 := $(word 3, $(subst ., ,$(LIBTRACEEVENT_VERSION)))
@ -1194,7 +1192,9 @@ ifneq ($(NO_LIBTRACEEVENT),1)
$(call feature_check,libtracefs)
ifeq ($(feature-libtracefs), 1)
EXTLIBS += -ltracefs
CFLAGS += $(shell $(PKG_CONFIG) --cflags libtracefs)
LDFLAGS += $(shell $(PKG_CONFIG) --libs-only-L libtracefs)
EXTLIBS += $(shell $(PKG_CONFIG) --libs-only-l libtracefs)
LIBTRACEFS_VERSION := $(shell $(PKG_CONFIG) --modversion libtracefs)
LIBTRACEFS_VERSION_1 := $(word 1, $(subst ., ,$(LIBTRACEFS_VERSION)))
LIBTRACEFS_VERSION_2 := $(word 2, $(subst ., ,$(LIBTRACEFS_VERSION)))
@ -1315,7 +1315,6 @@ ifeq ($(VF),1)
$(call print_var,LIBUNWIND_DIR)
$(call print_var,LIBDW_DIR)
$(call print_var,JDIR)
$(call print_var,LIBTRACEEVENT_DIR)
ifeq ($(dwarf-post-unwind),1)
$(call feature_print_text,"DWARF post unwind library", $(dwarf-post-unwind-text)) $(info $(MSG))