[PATCH 4/4] Makefiles: Add experimental tag check and warnings to trigger on use

[Neil Horman <nhorman@tuxdriver.com>]

Add checks during build to ensure that all symbols in the EXPERIMENTAL
version map section have __experimental tags on their definitions, and
enable the warnings needed to announce their use.  Also add a
ALLOW_EXPERIMENTAL_FUNCTIONS variable check to allow for in-tree dpdk
libraries to override those checks.

Signed-off-by: Neil Horman <nhorman@tuxdriver.com>
CC: Thomas Monjalon <thomas@monjalon.net>
CC: "Mcnamara, John" <john.mcnamara@intel.com>
---
 app/test-eventdev/Makefile                 |  2 ++
 app/test-pmd/Makefile                      |  2 ++
 drivers/event/sw/Makefile                  |  2 ++
 drivers/net/failsafe/Makefile              |  2 ++
 drivers/net/ixgbe/Makefile                 |  2 ++
 examples/eventdev_pipeline_sw_pmd/Makefile |  2 ++
 examples/flow_classify/Makefile            |  2 ++
 examples/ipsec-secgw/Makefile              |  2 ++
 examples/service_cores/Makefile            |  2 ++
 lib/librte_eal/linuxapp/Makefile           |  2 ++
 lib/librte_eal/linuxapp/eal/Makefile       |  4 ++++
 lib/librte_eventdev/Makefile               |  3 +++
 lib/librte_security/Makefile               |  3 +++
 mk/internal/rte.compile-pre.mk             | 14 ++++++++++++--
 mk/toolchain/clang/rte.vars.mk             |  2 +-
 mk/toolchain/gcc/rte.vars.mk               |  2 +-
 mk/toolchain/icc/rte.vars.mk               |  4 ++--
 17 files changed, 46 insertions(+), 6 deletions(-)

diff --git a/app/test-eventdev/Makefile b/app/test-eventdev/Makefile
index dcb2ac476..e68870828 100644
--- a/app/test-eventdev/Makefile
+++ b/app/test-eventdev/Makefile
@@ -32,6 +32,8 @@ include $(RTE_SDK)/mk/rte.vars.mk
 
 APP = dpdk-test-eventdev
 
+ALLOW_EXPERIMENTAL_FUNCTIONS := 1
+
 CFLAGS += -O3
 CFLAGS += $(WERROR_FLAGS)
 
diff --git a/app/test-pmd/Makefile b/app/test-pmd/Makefile
index d21308fcd..f0262a369 100644
--- a/app/test-pmd/Makefile
+++ b/app/test-pmd/Makefile
@@ -33,6 +33,8 @@ include $(RTE_SDK)/mk/rte.vars.mk
 
 ifeq ($(CONFIG_RTE_TEST_PMD),y)
 
+ALLOW_EXPERIMENTAL_FUNCTIONS := 1
+
 #
 # library name
 #
diff --git a/drivers/event/sw/Makefile b/drivers/event/sw/Makefile
index 2f2b67bac..0711ce46e 100644
--- a/drivers/event/sw/Makefile
+++ b/drivers/event/sw/Makefile
@@ -33,6 +33,8 @@ include $(RTE_SDK)/mk/rte.vars.mk
 # library name
 LIB = librte_pmd_sw_event.a
 
+ALLOW_EXPERIMENTAL_FUNCTIONS := 1
+
 # build flags
 CFLAGS += -O3
 CFLAGS += $(WERROR_FLAGS)
diff --git a/drivers/net/failsafe/Makefile b/drivers/net/failsafe/Makefile
index ea2a8fe46..795da9d56 100644
--- a/drivers/net/failsafe/Makefile
+++ b/drivers/net/failsafe/Makefile
@@ -36,6 +36,8 @@ LIB = librte_pmd_failsafe.a
 
 EXPORT_MAP := rte_pmd_failsafe_version.map
 
+ALLOW_EXPERIMENTAL_FUNCTIONS := 1
+
 LIBABIVER := 1
 
 # Sources are stored in SRCS-y
diff --git a/drivers/net/ixgbe/Makefile b/drivers/net/ixgbe/Makefile
index 511a64eb0..b8431600a 100644
--- a/drivers/net/ixgbe/Makefile
+++ b/drivers/net/ixgbe/Makefile
@@ -36,6 +36,8 @@ include $(RTE_SDK)/mk/rte.vars.mk
 #
 LIB = librte_pmd_ixgbe.a
 
+ALLOW_EXPERIMENTAL_FUNCTIONS := 1
+
 CFLAGS += -O3
 CFLAGS += $(WERROR_FLAGS)
 
diff --git a/examples/eventdev_pipeline_sw_pmd/Makefile b/examples/eventdev_pipeline_sw_pmd/Makefile
index de4e22c88..4272caf93 100644
--- a/examples/eventdev_pipeline_sw_pmd/Makefile
+++ b/examples/eventdev_pipeline_sw_pmd/Makefile
@@ -32,6 +32,8 @@ ifeq ($(RTE_SDK),)
 $(error "Please define RTE_SDK environment variable")
 endif
 
+ALLOW_EXPERIMENTAL_FUNCTIONS := 1
+
 # Default target, can be overridden by command line or environment
 RTE_TARGET ?= x86_64-native-linuxapp-gcc
 
diff --git a/examples/flow_classify/Makefile b/examples/flow_classify/Makefile
index eecdde14c..b04747c40 100644
--- a/examples/flow_classify/Makefile
+++ b/examples/flow_classify/Makefile
@@ -33,6 +33,8 @@ ifeq ($(RTE_SDK),)
 $(error "Please define RTE_SDK environment variable")
 endif
 
+ALLOW_EXPERIMENTAL_FUNCTIONS := 1
+
 # Default target, can be overridden by command line or environment
 RTE_TARGET ?= x86_64-native-linuxapp-gcc
 
diff --git a/examples/ipsec-secgw/Makefile b/examples/ipsec-secgw/Makefile
index 9fd33cb7f..90a4feca1 100644
--- a/examples/ipsec-secgw/Makefile
+++ b/examples/ipsec-secgw/Makefile
@@ -33,6 +33,8 @@ ifeq ($(RTE_SDK),)
 	$(error "Please define RTE_SDK environment variable")
 endif
 
+ALLOW_EXPERIMENTAL_FUNCTIONS := 1
+
 # Default target, can be overridden by command line or environment
 RTE_TARGET ?= x86_64-native-linuxapp-gcc
 
diff --git a/examples/service_cores/Makefile b/examples/service_cores/Makefile
index bd4a345dc..ba731e259 100644
--- a/examples/service_cores/Makefile
+++ b/examples/service_cores/Makefile
@@ -32,6 +32,8 @@ ifeq ($(RTE_SDK),)
 $(error "Please define RTE_SDK environment variable")
 endif
 
+ALLOW_EXPERIMENTAL_FUNCTIONS := 1
+
 # Default target, can be overridden by command line or environment
 RTE_TARGET ?= x86_64-native-linuxapp-gcc
 
diff --git a/lib/librte_eal/linuxapp/Makefile b/lib/librte_eal/linuxapp/Makefile
index 2ebdf3139..11ee59e42 100644
--- a/lib/librte_eal/linuxapp/Makefile
+++ b/lib/librte_eal/linuxapp/Makefile
@@ -31,6 +31,8 @@
 
 include $(RTE_SDK)/mk/rte.vars.mk
 
+ALLOW_EXPERIMENTAL_FUNCTIONS := 2
+
 DIRS-$(CONFIG_RTE_EXEC_ENV_LINUXAPP) += eal
 DIRS-$(CONFIG_RTE_EAL_IGB_UIO) += igb_uio
 DIRS-$(CONFIG_RTE_KNI_KMOD) += kni
diff --git a/lib/librte_eal/linuxapp/eal/Makefile b/lib/librte_eal/linuxapp/eal/Makefile
index 5a7b8b2ac..84f8edf39 100644
--- a/lib/librte_eal/linuxapp/eal/Makefile
+++ b/lib/librte_eal/linuxapp/eal/Makefile
@@ -34,6 +34,10 @@ include $(RTE_SDK)/mk/rte.vars.mk
 LIB = librte_eal.a
 
 ARCH_DIR ?= $(RTE_ARCH)
+
+#Allow the use of experimental functions without warning
+ALLOW_EXPERIMENTAL_FUNCTIONS := 1 
+
 EXPORT_MAP := ../../rte_eal_version.map
 VPATH += $(RTE_SDK)/lib/librte_eal/common/arch/$(ARCH_DIR)
 
diff --git a/lib/librte_eventdev/Makefile b/lib/librte_eventdev/Makefile
index 5ac22cde7..8ae9e16f3 100644
--- a/lib/librte_eventdev/Makefile
+++ b/lib/librte_eventdev/Makefile
@@ -36,6 +36,9 @@ LIB = librte_eventdev.a
 # library version
 LIBABIVER := 3
 
+# Allow the use of experimental functions 
+ALLOW_EXPERIMENTAL_FUNCTIONS := 1
+
 # build flags
 CFLAGS += -O3
 CFLAGS += $(WERROR_FLAGS)
diff --git a/lib/librte_security/Makefile b/lib/librte_security/Makefile
index bb93ec33d..c2815fab8 100644
--- a/lib/librte_security/Makefile
+++ b/lib/librte_security/Makefile
@@ -36,6 +36,9 @@ LIB = librte_security.a
 # library version
 LIBABIVER := 1
 
+# Allow the use of experimental functions without warnings
+ALLOW_EXPERIMENTAL_FUNCTIONS := 1
+
 # build flags
 CFLAGS += -O3
 CFLAGS += $(WERROR_FLAGS)
diff --git a/mk/internal/rte.compile-pre.mk b/mk/internal/rte.compile-pre.mk
index da8dda498..f67048d75 100644
--- a/mk/internal/rte.compile-pre.mk
+++ b/mk/internal/rte.compile-pre.mk
@@ -72,18 +72,27 @@ CMDS-all := $(CMDS-y) $(CMDS-n) $(CMDS-)
 
 -include $(DEPS-y) $(CMDS-y)
 
+ifdef ALLOW_EXPERIMENTAL_FUNCTIONS
+EXPERIMENTAL_CFLAGS := $(subst 1, -Wno-deprecated-declarations -Wno-deprecated -Wno-error=deprecated-declarations -Wno-error=deprecated, $(ALLOW_EXPERIMENTAL_FUNCTIONS))
+else
+EXPERIMENTAL_CFLAGS := 
+endif
+
 # command to compile a .c file to generate an object
 ifeq ($(USE_HOST),1)
 C_TO_O = $(HOSTCC) -Wp,-MD,$(call obj2dep,$(@)).tmp $(HOST_CPPFLAGS) $(HOST_CFLAGS) \
-	$(CFLAGS_$(@)) $(HOST_EXTRA_CPPFLAGS) $(HOST_EXTRA_CFLAGS) -o $@ -c $<
+	$(CFLAGS_$(@)) $(HOST_EXTRA_CPPFLAGS) $(HOST_EXTRA_CFLAGS) $(EXPERIMENTAL_CFLAGS) -o $@ -c $<
 C_TO_O_STR = $(subst ','\'',$(C_TO_O)) #'# fix syntax highlight
 C_TO_O_DISP = $(if $(V),"$(C_TO_O_STR)","  HOSTCC $(@)")
 else
 C_TO_O = $(CC) -Wp,-MD,$(call obj2dep,$(@)).tmp $(CPPFLAGS) $(CFLAGS) \
-	$(CFLAGS_$(@)) $(EXTRA_CPPFLAGS) $(EXTRA_CFLAGS) -o $@ -c $<
+	$(CFLAGS_$(@)) $(EXTRA_CPPFLAGS) $(EXTRA_CFLAGS) $(EXPERIMENTAL_CFLAGS) -o $@ -c $<
 C_TO_O_STR = $(subst ','\'',$(C_TO_O)) #'# fix syntax highlight
 C_TO_O_DISP = $(if $(V),"$(C_TO_O_STR)","  CC $(@)")
 endif
+EXPERIMENTAL_CHECK = $(RTE_SDK)/buildtools/experimentalsyms.sh
+CHECK_EXPERIMENTAL = $(EXPERIMENTAL_CHECK) $(SRCDIR)/$(EXPORT_MAP) $@
+
 PMDINFO_GEN = $(RTE_SDK_BIN)/app/dpdk-pmdinfogen $@ $@.pmd.c
 PMDINFO_CC = $(CC) $(CPPFLAGS) $(CFLAGS) -c -o $@.pmd.o $@.pmd.c
 PMDINFO_LD = $(CROSS)ld $(LDFLAGS) -r -o $@.o $@.pmd.o $@
@@ -100,6 +109,7 @@ C_TO_O_DO = @set -e; \
 	echo $(C_TO_O_DISP); \
 	$(C_TO_O) && \
 	$(PMDINFO_TO_O) && \
+	$(CHECK_EXPERIMENTAL) && \
 	echo $(C_TO_O_CMD) > $(call obj2cmd,$(@)) && \
 	sed 's,'$@':,dep_'$@' =,' $(call obj2dep,$(@)).tmp > $(call obj2dep,$(@)) && \
 	rm -f $(call obj2dep,$(@)).tmp
diff --git a/mk/toolchain/clang/rte.vars.mk b/mk/toolchain/clang/rte.vars.mk
index dde922d22..3cfe92545 100644
--- a/mk/toolchain/clang/rte.vars.mk
+++ b/mk/toolchain/clang/rte.vars.mk
@@ -67,7 +67,7 @@ WERROR_FLAGS := -W -Wall -Wstrict-prototypes -Wmissing-prototypes
 WERROR_FLAGS += -Wmissing-declarations -Wold-style-definition -Wpointer-arith
 WERROR_FLAGS += -Wnested-externs -Wcast-qual
 WERROR_FLAGS += -Wformat-nonliteral -Wformat-security
-WERROR_FLAGS += -Wundef -Wwrite-strings
+WERROR_FLAGS += -Wundef -Wwrite-strings -Wdeprecated
 
 ifeq ($(RTE_DEVEL_BUILD),y)
 WERROR_FLAGS += -Werror
diff --git a/mk/toolchain/gcc/rte.vars.mk b/mk/toolchain/gcc/rte.vars.mk
index 3b907e201..3356a37c8 100644
--- a/mk/toolchain/gcc/rte.vars.mk
+++ b/mk/toolchain/gcc/rte.vars.mk
@@ -75,7 +75,7 @@ WERROR_FLAGS := -W -Wall -Wstrict-prototypes -Wmissing-prototypes
 WERROR_FLAGS += -Wmissing-declarations -Wold-style-definition -Wpointer-arith
 WERROR_FLAGS += -Wcast-align -Wnested-externs -Wcast-qual
 WERROR_FLAGS += -Wformat-nonliteral -Wformat-security
-WERROR_FLAGS += -Wundef -Wwrite-strings
+WERROR_FLAGS += -Wundef -Wwrite-strings -Wdeprecated
 
 ifeq ($(RTE_DEVEL_BUILD),y)
 WERROR_FLAGS += -Werror
diff --git a/mk/toolchain/icc/rte.vars.mk b/mk/toolchain/icc/rte.vars.mk
index 33a8ba79e..b4b992e0e 100644
--- a/mk/toolchain/icc/rte.vars.mk
+++ b/mk/toolchain/icc/rte.vars.mk
@@ -70,10 +70,10 @@ TOOLCHAIN_ASFLAGS =
 #   error #15527: loop was not vectorized: function call to fprintf cannot be vectorize
 #                   was declared "deprecated"
 #   Warning #11074, 11076: to prevent "inline-max-size" warnings.
-WERROR_FLAGS := -Wall -w2 -diag-disable 271 -diag-warning 1478
+WERROR_FLAGS := -Wall -w2 -diag-disable 271 -diag-warning 1478 
 WERROR_FLAGS += -diag-disable 13368 -diag-disable 15527
 WERROR_FLAGS += -diag-disable 188
-WERROR_FLAGS += -diag-disable 11074 -diag-disable 11076
+WERROR_FLAGS += -diag-disable 11074 -diag-disable 11076 -Wdeprecated
 
 ifeq ($(RTE_DEVEL_BUILD),y)
 WERROR_FLAGS += -Werror-all
-- 
2.14.3