[dpdk-dev] [PATCH 19.08 6/6] examples/vhost_crypto: support building from pkg-config info

[Bruce Richardson <bruce.richardson@intel.com>]

The vhost_crypto example app did not check for a libdpdk pkg-config file
and attempt to build using that. Add support for that method of compile to
align the app with the other examples.

Signed-off-by: Bruce Richardson <bruce.richardson@intel.com>
---
 examples/vhost_crypto/Makefile | 55 +++++++++++++++++++++++++++++-----
 1 file changed, 47 insertions(+), 8 deletions(-)

diff --git a/examples/vhost_crypto/Makefile b/examples/vhost_crypto/Makefile
index 80af3de0c..cec85896f 100644
--- a/examples/vhost_crypto/Makefile
+++ b/examples/vhost_crypto/Makefile
@@ -1,6 +1,50 @@
 # SPDX-License-Identifier: BSD-3-Clause
 # Copyright(c) 2017-2018 Intel Corporation
 
+# binary name
+APP = vhost-crypto
+
+# all source are stored in SRCS-y
+SRCS-y := main.c
+CFLAGS += -DALLOW_EXPERIMENTAL_API
+
+# Build using pkg-config variables if possible
+$(shell pkg-config --exists libdpdk)
+ifeq ($(.SHELLSTATUS),0)
+
+all: shared
+.PHONY: shared static
+shared: build/$(APP)-shared
+	ln -sf $(APP)-shared build/$(APP)
+static: build/$(APP)-static
+	ln -sf $(APP)-static build/$(APP)
+
+PKGCONF=pkg-config
+ifneq ($(DPDK_PC_PREFIX),)
+	PKGCONF += --define-variable=prefix=$(DPDK_PC_PREFIX)
+endif
+
+PC_FILE := $(shell $(PKGCONF) --path libdpdk)
+CFLAGS += -O3 $(shell $(PKGCONF) --cflags libdpdk)
+LDFLAGS_SHARED = $(shell $(PKGCONF) --libs libdpdk)
+LDFLAGS_STATIC = -Wl,-Bstatic $(shell $(PKGCONF) --static --libs libdpdk)
+
+build/$(APP)-shared: $(SRCS-y) Makefile $(PC_FILE) | build
+	$(CC) $(CFLAGS) $(SRCS-y) -o $@ $(LDFLAGS) $(LDFLAGS_SHARED)
+
+build/$(APP)-static: $(SRCS-y) Makefile $(PC_FILE) | build
+	$(CC) $(CFLAGS) $(SRCS-y) -o $@ $(LDFLAGS) $(LDFLAGS_STATIC)
+
+build:
+	@mkdir -p $@
+
+.PHONY: clean
+clean:
+	rm -f build/$(APP) build/$(APP)-static build/$(APP)-shared
+	rmdir --ignore-fail-on-non-empty build
+
+else
+
 ifeq ($(RTE_SDK),)
 $(error "Please define RTE_SDK environment variable")
 endif
@@ -16,16 +60,11 @@ please change the definition of the RTE_TARGET environment variable)
 all:
 else
 
-# binary name
-APP = vhost-crypto
-
-# all source are stored in SRCS-y
-SRCS-y := main.c
-
-CFLAGS += -DALLOW_EXPERIMENTAL_API
 CFLAGS += -O2 -D_FILE_OFFSET_BITS=64
 CFLAGS += $(WERROR_FLAGS)
 
 include $(RTE_SDK)/mk/rte.extapp.mk
 
-endif
+endif # Linux
+
+endif # pkg-config
-- 
2.20.1