libusb-compat: add simple ptest (example programs)

Build and run example programs as test. This will only catch major
errors (.so lib won't load etc.) because no output check is done, only
return status is checked.

Signed-off-by: Yoann Congal <yoann.congal@smile.fr>
Reviewed-by: Ever ATILANO <ever.atilano@smile.fr>
Signed-off-by: Khem Raj <raj.khem@gmail.com>

meta-oe/recipes-support/libusb/libusb-compat/0002-automake-make-example-programs-installable.patch

@@ -0,0 +1,24 @@
+From 9dcdfa716e3c3831d9b70472b39dab2fd370f503 Mon Sep 17 00:00:00 2001
+From: Yoann Congal <yoann.congal@smile.fr>
+Date: Sun, 26 Feb 2023 16:04:35 +0100
+Subject: [PATCH] automake: make example programs installable
+
+The example programs are used as tests for ptest, so we need a way to
+install them on the rootfs.
+
+Upstream-Status: Inappropriate [oe-core specific]
+---
+ examples/Makefile.am | 2 +-
+ 1 file changed, 1 insertion(+), 1 deletion(-)
+
+diff --git a/examples/Makefile.am b/examples/Makefile.am
+index 9bd3efc..f4324c2 100644
+--- a/examples/Makefile.am
++++ b/examples/Makefile.am
+@@ -1,5 +1,5 @@
+ AM_CPPFLAGS = -I$(top_srcdir)/libusb
+-noinst_PROGRAMS = lsusb testlibusb
++bin_PROGRAMS = lsusb testlibusb
+ 
+ lsusb_SOURCES = lsusb.c
+ lsusb_LDADD = ../libusb/libusb.la

meta-oe/recipes-support/libusb/libusb-compat/run-ptest

@@ -0,0 +1,14 @@
+#!/bin/sh
+
+rc=0
+for TEST in lsusb testlibusb; do
+	if ! ./$TEST ; then
+		echo "FAIL: $TEST"
+		rc=$((rc + 1))
+	else
+		echo "PASS: $TEST"
+	fi
+done
+
+# return number of failed tests
+exit $rc

meta-oe/recipes-support/libusb/libusb-compat_0.1.8.bb

@@ -21,6 +21,8 @@ PE = "1"
 SRC_URI = " \
     git://github.com/libusb/libusb-compat-0.1.git;protocol=https;branch=master \
     file://0001-usb.h-Include-sys-types.h.patch \
+    file://0002-automake-make-example-programs-installable.patch \
+    file://run-ptest \
 "
 SRCREV = "c497eff1ae8c4cfd4fdff370f04c78fa0584f4f3"
 S = "${WORKDIR}/git"
@@ -29,5 +31,14 @@ UPSTREAM_CHECK_URI = "https://github.com/libusb/libusb-compat-0.1/releases"
 
 BINCONFIG = "${bindir}/libusb-config"
 
-inherit autotools pkgconfig binconfig-disabled lib_package
+inherit autotools pkgconfig binconfig-disabled lib_package ptest
 
+# examples are used as ptest so enable them at configuration if needed
+EXTRA_OECONF += "${@bb.utils.contains('PTEST_ENABLED', '1', '--enable-examples-build', '', d)}"
+
+# Move test binaries out of bindir to avoid clashing with a "real" lsusb.
+do_install_ptest() {
+    for bin in lsusb testlibusb; do
+       mv ${D}${bindir}/$bin ${D}${PTEST_PATH}
+    done
+}