Index: a/libsigc++-1.0.4-r3.ebuild
===================================================================
--- a/libsigc++-1.0.4-r3.ebuild	2011-08-05 20:59:55.724995037 +0400
+++ b/libsigc++-1.0.4-r3.ebuild	2011-08-05 21:00:13.037995028 +0400
@@ -13,7 +13,7 @@
 KEYWORDS="alpha amd64 arm hppa ia64 ppc sh sparc x86"
 IUSE="debug"
 
-DEPEND=""
+DEPEND="sys-devel/m4"
 RDEPEND=""
 
 src_unpack() {
Index: a/libsigc++-1.2.7.ebuild
===================================================================
--- a/libsigc++-1.2.7.ebuild	2011-08-05 20:59:55.724995037 +0400
+++ b/libsigc++-1.2.7.ebuild	2011-08-05 21:08:44.064994768 +0400
@@ -15,8 +15,8 @@
 KEYWORDS="alpha amd64 arm hppa ia64 ppc ppc64 sh sparc x86"
 IUSE=""
 
+DEPEND="sys-devel/m4"
 RDEPEND=""
-DEPEND=""
 
 pkg_setup() {
 	DOCS="AUTHORS ChangeLog FEATURES IDEAS README NEWS TODO"
Index: a/libsigc++-2.2.10.ebuild
===================================================================
--- a/libsigc++-2.2.10.ebuild	2011-08-05 20:59:55.724995037 +0400
+++ b/libsigc++-2.2.10.ebuild	2011-08-05 21:01:40.494994985 +0400
@@ -14,6 +14,9 @@
 KEYWORDS="~alpha ~amd64 ~arm ~hppa ~ia64 ~mips ~ppc ~ppc64 ~s390 ~sh ~sparc ~x86 ~x86-fbsd ~amd64-linux ~x86-linux ~ppc-macos ~x64-macos ~x86-macos ~sparc-solaris ~x64-solaris ~x86-solaris"
 IUSE="doc static-libs test"
 
+DEPEND="sys-devel/m4"
+RDEPEND=""
+
 # Needs mm-common for eautoreconf
 src_prepare() {
 	# don't waste time building examples
Index: a/libsigc++-2.2.7.ebuild
===================================================================
--- a/libsigc++-2.2.7.ebuild	2011-08-05 20:59:55.724995037 +0400
+++ b/libsigc++-2.2.7.ebuild	2011-08-05 21:01:01.543995003 +0400
@@ -14,6 +14,9 @@
 KEYWORDS="alpha amd64 arm hppa ia64 ~mips ppc ppc64 s390 sh sparc x86 ~x86-fbsd ~amd64-linux ~x86-linux ~ppc-macos ~x64-macos ~x86-macos ~sparc-solaris ~x64-solaris ~x86-solaris"
 IUSE="doc test"
 
+DEPEND="sys-devel/m4"
+RDEPEND=""
+
 # Needs mm-common for eautoreconf
 src_prepare() {
 	# don't waste time building examples
Index: a/libsigc++-2.2.9.ebuild
===================================================================
--- a/libsigc++-2.2.9.ebuild	2011-08-05 20:59:55.724995037 +0400
+++ b/libsigc++-2.2.9.ebuild	2011-08-05 21:01:14.483994998 +0400
@@ -14,6 +14,9 @@
 KEYWORDS="~alpha amd64 arm ~hppa ~ia64 ~mips ~ppc ~ppc64 ~s390 ~sh ~sparc x86 ~x86-fbsd ~amd64-linux ~x86-linux ~ppc-macos ~x64-macos ~x86-macos ~sparc-solaris ~x64-solaris ~x86-solaris"
 IUSE="doc static-libs test"
 
+DEPEND="sys-devel/m4"
+RDEPEND=""
+
 # Needs mm-common for eautoreconf
 src_prepare() {
 	# don't waste time building examples