Makefile.ABI.workarounds

   1 # Work-around for distro-specific public modules ABI breakages.
   2 # Some distributions break the public module instrumentation ABI
   3 # compared to upstream stable kernels without providing other mean than
   4 # the kernel EXTRAVERSION to figure it out. Translate this information
   5 # into a define visible from the C preprocessor.
   6
   7 DEB_API_VERSION:=$(shell $(TOP_LTTNG_MODULES_DIR)/abi-debian-version.sh $(CURDIR))
   8
   9 ifneq ($(DEB_API_VERSION), 0)
  10   ccflags-y += -DDEBIAN_API_VERSION=$(DEB_API_VERSION)
  11 endif
  12
  13 RHEL_API_VERSION:=$(shell $(TOP_LTTNG_MODULES_DIR)/abi-rhel-version.sh $(CURDIR))
  14
  15 ifneq ($(RHEL_API_VERSION), 0)
  16   ccflags-y += -DRHEL_API_VERSION=$(RHEL_API_VERSION)
  17 endif
  18
  19 SLE_API_VERSION:=$(shell $(TOP_LTTNG_MODULES_DIR)/abi-sle-version.sh $(CURDIR))
  20
  21 ifneq ($(SLE_API_VERSION), 0)
  22   ccflags-y += -DSLE_API_VERSION=$(SLE_API_VERSION)
  23 endif
  24
  25 RT_PATCH_VERSION:=$(shell $(TOP_LTTNG_MODULES_DIR)/rt-patch-version.sh $(CURDIR))
  26
  27 ifneq ($(RT_PATCH_VERSION), 0)
  28   ccflags-y += -DRT_PATCH_VERSION=$(RT_PATCH_VERSION)
  29 endif
  30
  31 # Starting with kernel 4.12, the ftrace header was moved to private headers
  32 # and as such is not available when building against distro headers instead
  33 # of the full kernel sources. In the situation, define LTTNG_FTRACE_MISSING_HEADER
  34 # so we can enable the compat code even if CONFIG_DYNAMIC_FTRACE is enabled.
  35 ifneq ($(CONFIG_DYNAMIC_FTRACE),)
  36   ftrace_dep = $(srctree)/kernel/trace/trace.h
  37   ftrace_dep_check = $(wildcard $(ftrace_dep))
  38   have_ftrace_header = $(shell \
  39     if [ $(VERSION) -ge 5 -o \( $(VERSION) -eq 4 -a $(PATCHLEVEL) -ge 12 \) ] ; then \
  40       if [ -z "$(ftrace_dep_check)" ] ; then \
  41         echo "no" ; \
  42         exit ; \
  43       fi; \
  44     fi; \
  45     echo "yes" ; \
  46     )
  47   ifeq ($(have_ftrace_header), no)
  48     ccflags-y += -DLTTNG_FTRACE_MISSING_HEADER
  49   endif
  50 endif