Kbuild.common

   1 # SPDX-License-Identifier: (GPL-2.0 OR LGPL-2.1)
   2
   3 # Work-around for distro-specific public modules ABI breakages.
   4 # Some distributions break the public module instrumentation ABI
   5 # compared to upstream stable kernels without providing other mean than
   6 # the kernel EXTRAVERSION to figure it out. Translate this information
   7 # into a define visible from the C preprocessor.
   8
   9 DEB_API_VERSION:=$(shell $(TOP_LTTNG_MODULES_DIR)/scripts/abi-debian-version.sh $(CURDIR))
  10
  11 ifneq ($(DEB_API_VERSION), 0)
  12   ccflags-y += -DDEBIAN_API_VERSION=$(DEB_API_VERSION)
  13 endif
  14
  15 RHEL_API_VERSION:=$(shell $(TOP_LTTNG_MODULES_DIR)/scripts/abi-rhel-version.sh $(CURDIR))
  16
  17 ifneq ($(RHEL_API_VERSION), 0)
  18   ccflags-y += -DRHEL_API_VERSION=$(RHEL_API_VERSION)
  19 endif
  20
  21 SLE_API_VERSION:=$(shell $(TOP_LTTNG_MODULES_DIR)/scripts/abi-sle-version.sh $(CURDIR))
  22
  23 ifneq ($(SLE_API_VERSION), 0)
  24   ccflags-y += -DSLE_API_VERSION=$(SLE_API_VERSION)
  25 endif
  26
  27 FEDORA_REVISION_VERSION:=$(shell $(TOP_LTTNG_MODULES_DIR)/scripts/abi-fedora-version.sh $(CURDIR))
  28
  29 ifneq ($(FEDORA_REVISION_VERSION), 0)
  30   ccflags-y += -DFEDORA_REVISION_VERSION=$(FEDORA_REVISION_VERSION)
  31 endif
  32
  33 RT_PATCH_VERSION:=$(shell $(TOP_LTTNG_MODULES_DIR)/scripts/rt-patch-version.sh $(CURDIR))
  34
  35 ifneq ($(RT_PATCH_VERSION), 0)
  36   ccflags-y += -DRT_PATCH_VERSION=$(RT_PATCH_VERSION)
  37 endif
  38
  39 EXTRA_VERSION_NAME:=$(shell $(TOP_LTTNG_MODULES_DIR)/scripts/extra-version-name.sh $(TOP_LTTNG_MODULES_DIR))
  40
  41 ifneq ($(EXTRA_VERSION_NAME), 0)
  42   ccflags-y += -DLTTNG_EXTRA_VERSION_NAME='"$(EXTRA_VERSION_NAME)"'
  43 endif
  44
  45 EXTRA_VERSION_GIT:=$(shell $(TOP_LTTNG_MODULES_DIR)/scripts/extra-version-git.sh $(TOP_LTTNG_MODULES_DIR))
  46
  47 ifneq ($(EXTRA_VERSION_GIT), 0)
  48   ccflags-y += -DLTTNG_EXTRA_VERSION_GIT='"$(EXTRA_VERSION_GIT)"'
  49 endif
  50
  51 EXTRA_VERSION_PATCHES:=$(shell $(TOP_LTTNG_MODULES_DIR)/scripts/extra-version-patches.sh $(TOP_LTTNG_MODULES_DIR))
  52
  53 # Starting with kernel 4.12, the ftrace header was moved to private headers
  54 # and as such is not available when building against distro headers instead
  55 # of the full kernel sources. In the situation, define LTTNG_FTRACE_MISSING_HEADER
  56 # so we can enable the compat code even if CONFIG_DYNAMIC_FTRACE is enabled.
  57 ifneq ($(CONFIG_DYNAMIC_FTRACE),)
  58   ftrace_dep = $(srctree)/kernel/trace/trace.h
  59   ftrace_dep_check = $(wildcard $(ftrace_dep))
  60   have_ftrace_header = $(shell \
  61     if [ $(VERSION) -ge 5 -o \( $(VERSION) -eq 4 -a $(PATCHLEVEL) -ge 12 \) ] ; then \
  62       if [ -z "$(ftrace_dep_check)" ] ; then \
  63         echo "no" ; \
  64         exit ; \
  65       fi; \
  66     fi; \
  67     echo "yes" ; \
  68     )
  69   ifeq ($(have_ftrace_header), no)
  70     ccflags-y += -DLTTNG_FTRACE_MISSING_HEADER
  71   endif
  72 endif
  73
  74 mnt_ns_dep = $(srctree)/fs/mount.h
  75 ifeq ($(wildcard $(mnt_ns_dep)),)
  76     ccflags-y += -DLTTNG_MNT_NS_MISSING_HEADER
  77 endif
  78
  79 # vim:syntax=make