app: generalize meson build

Since most apps are built in largely the same way, generalize the logic
into a foreach loop in app/meson.build file.

Signed-off-by: Bruce Richardson <bruce.richardson@intel.com>
Acked-by: Harry van Haaren <harry.van.haaren@intel.com>

app/meson.build

@@ -1,5 +1,53 @@
 # SPDX-License-Identifier: BSD-3-Clause
 # Copyright(c) 2017 Intel Corporation
 
-subdir('test-pmd')
-subdir('test-eventdev')
+apps = ['test-eventdev',
+	'test-pmd']
+
+# for BSD only
+lib_execinfo = cc.find_library('execinfo', required: false)
+
+foreach app:apps
+	build = true
+	name = app
+	allow_experimental_apis = false
+	sources = []
+	includes = []
+	cflags = machine_args
+	objs = [] # other object files to link against, used e.g. for
+	          # instruction-set optimized versions of code
+
+	# use "deps" for internal DPDK dependencies, and "ext_deps" for
+	# external package/library requirements
+	ext_deps = []
+	deps = []
+
+	subdir(name)
+
+	if build
+		dep_objs = []
+		foreach d:deps
+			dep_objs += get_variable(get_option('default_library')
+				 + '_rte_' + d)
+		endforeach
+		dep_objs += lib_execinfo
+
+		link_libs = []
+		if get_option('default_library') == 'static'
+			link_libs = dpdk_drivers
+		endif
+
+		if allow_experimental_apis
+			cflags += '-DALLOW_EXPERIMENTAL_API'
+		endif
+
+		executable('dpdk-' + name,
+				sources,
+				c_args: cflags,
+				link_whole: link_libs,
+				dependencies: dep_objs,
+				install_rpath: join_paths(get_option('prefix'),
+						 driver_install_path),
+				install: true)
+	endif
+endforeach

app/test-eventdev/meson.build

@@ -1,6 +1,7 @@
 # SPDX-License-Identifier: BSD-3-Clause
 # Copyright(c) 2017 Cavium, Inc
 
+allow_experimental_apis = true
 sources = files('evt_main.c',
 		'evt_options.c',
 		'evt_test.c',
@@ -11,19 +12,4 @@ sources = files('evt_main.c',
 		'test_perf_common.c',
 		'test_perf_atq.c',
 		'test_perf_queue.c')
-
-dep_objs = [get_variable(get_option('default_library') + '_rte_eventdev')]
-dep_objs += cc.find_library('execinfo', required: false) # BSD only
-
-link_libs = []
-if get_option('default_library') == 'static'
-	link_libs = dpdk_drivers
-endif
-
-executable('dpdk-test-eventdev',
-	sources,
-	c_args: [machine_args, '-DALLOW_EXPERIMENTAL_API'],
-	link_whole: link_libs,
-	dependencies: dep_objs,
-	install_rpath: join_paths(get_option('prefix'), driver_install_path),
-	install: true)
+deps += 'eventdev'

app/test-pmd/meson.build

@@ -1,6 +1,9 @@
 # SPDX-License-Identifier: BSD-3-Clause
 # Copyright(c) 2017 Intel Corporation
 
+# override default name to drop the hyphen
+name = 'testpmd'
+allow_experimental_apis = true
 sources = files('cmdline.c',
 	'cmdline_flow.c',
 	'cmdline_mtr.c',
@@ -32,22 +35,3 @@ if dpdk_conf.has('RTE_LIBRTE_SOFTNIC_PMD')
 	sources += files('tm.c')
 	deps += 'pmd_softnic'
 endif
-
-dep_objs = []
-foreach d:deps
-	dep_objs += get_variable(get_option('default_library') + '_rte_' + d)
-endforeach
-dep_objs += cc.find_library('execinfo', required: false) # for BSD only
-
-link_libs = []
-if get_option('default_library') == 'static'
-	link_libs = dpdk_drivers
-endif
-
-executable('dpdk-testpmd',
-	sources,
-	c_args: [machine_args, '-DALLOW_EXPERIMENTAL_API'],
-	link_whole: link_libs,
-	dependencies: dep_objs,
-	install_rpath: join_paths(get_option('prefix'), driver_install_path),
-	install: true)