perf-scripting/perf-tui features, v3

new file mode 100644
index 0000000..d112751
@@ -0,0 +1,22 @@
+PERF_FEATURES_ENABLE ?= "perf-scripting perf-tui"
+
+def perf_feature_enabled(feature, trueval, falseval, d):
+    """
+    Check which perf features are enabled.
+
+    The PERF_FEATURES_ENABLE variable lists the perf features to
+    enable.  Override it if you want something different from what's
+    listed above, which is the default.  If empty, the build won't
+    enable any features (which may be exactly what you want, just a
+    barebones perf without any extra baggage, what you get if you
+    specify an empty feature list).
+
+    Available perf features:
+      perf-scripting: enable support for Perl and Python bindings
+      perf-tui: enable support for the perf TUI (via libnewt)
+
+    """
+    enabled_features = d.getVar("PERF_FEATURES_ENABLE", True) or ""
+    if feature in enabled_features:
+		return trueval
+    return falseval

index 381332e..d494243 100644
@@ -11,6 +11,8 @@ LIC_FILES_CHKSUM = "file://COPYING;md5=d7810fab7487fb0aad327b76f1be7cd7"
 
 PR = "r1"
 
+require perf.inc
+
 BUILDPERF_libc-uclibc = "no"
 
 DEPENDS = "virtual/kernel \

index d494243..e96552c 100644
@@ -9,7 +9,7 @@ as well."
 LICENSE = "GPLv2"
 LIC_FILES_CHKSUM = "file://COPYING;md5=d7810fab7487fb0aad327b76f1be7cd7"
 
-PR = "r1"
+PR = "r2"
 
 require perf.inc
 

@@ -21,7 +21,8 @@ DEPENDS = "virtual/kernel \
            ${MLPREFIX}binutils \
           "
 
-RDEPENDS_${PN} += "elfutils perl perl-modules python"
+SCRIPTING_RDEPENDS = "${@perf_feature_enabled('perf-scripting', 'perl perl-modules python', '',d)}"
+RDEPENDS_${PN} += "elfutils ${SCRIPTING_RDEPENDS}"
 
 PROVIDES = "virtual/perf"
 

@@ -45,6 +46,8 @@ export PERL_ARCHLIB = "${STAGING_LIBDIR}${PERL_OWN_DIR}/perl/${@get_perl_version
 S = "${STAGING_KERNEL_DIR}"
 B = "${WORKDIR}/${BPN}-${PV}"
 
+SCRIPTING_DEFINES = "${@perf_feature_enabled('perf-scripting', '', 'NO_LIBPERL=1 NO_LIBPYTHON=1',d)}"
+
 EXTRA_OEMAKE = \
 		'-C ${S}/tools/perf \
 		O=${B} \

@@ -53,7 +56,7 @@ EXTRA_OEMAKE = \
 		CC="${CC}" \
 		AR="${AR}" \
 		prefix=/usr \
-		NO_GTK2=1 NO_NEWT=1 NO_DWARF=1 \
+		NO_GTK2=1 NO_NEWT=1 NO_DWARF=1 ${SCRIPTING_DEFINES} \
 		'
 
 do_compile() {

@@ -62,6 +65,9 @@ do_compile() {
 
 do_install() {
 	oe_runmake DESTDIR=${D} install
+	if [ "${@perf_feature_enabled('perf-scripting', 1, 0, d)}" = "1" ]; then
+		oe_runmake DESTDIR=${D} install-python_ext
+	fi
 }
 
 PACKAGE_ARCH = "${MACHINE_ARCH}"

index e96552c..ccb7425 100644
@@ -9,16 +9,19 @@ as well."
 LICENSE = "GPLv2"
 LIC_FILES_CHKSUM = "file://COPYING;md5=d7810fab7487fb0aad327b76f1be7cd7"
 
-PR = "r2"
+PR = "r3"
 
 require perf.inc
 
 BUILDPERF_libc-uclibc = "no"
 
+TUI_DEPENDS = "${@perf_feature_enabled('perf-tui', 'libnewt', '',d)}"
+
 DEPENDS = "virtual/kernel \
            virtual/${MLPREFIX}libc \
            ${MLPREFIX}elfutils \
            ${MLPREFIX}binutils \
+           ${TUI_DEPENDS} \
           "
 
 SCRIPTING_RDEPENDS = "${@perf_feature_enabled('perf-scripting', 'perl perl-modules python', '',d)}"

@@ -47,6 +50,7 @@ S = "${STAGING_KERNEL_DIR}"
 B = "${WORKDIR}/${BPN}-${PV}"
 
 SCRIPTING_DEFINES = "${@perf_feature_enabled('perf-scripting', '', 'NO_LIBPERL=1 NO_LIBPYTHON=1',d)}"
+TUI_DEFINES = "${@perf_feature_enabled('perf-tui', '', 'NO_NEWT=1',d)}"
 
 EXTRA_OEMAKE = \
 		'-C ${S}/tools/perf \

@@ -56,7 +60,7 @@ EXTRA_OEMAKE = \
 		CC="${CC}" \
 		AR="${AR}" \
 		prefix=/usr \
-		NO_GTK2=1 NO_NEWT=1 NO_DWARF=1 ${SCRIPTING_DEFINES} \
+		NO_GTK2=1 ${TUI_DEFINES} NO_DWARF=1 ${SCRIPTING_DEFINES} \
 		'
 
 do_compile() {