bison: remove obsolete patch

m4.patch was added before 2005 (history isn't in git, only BitKeeper) and
doesn't appear to be needed anymore.

Also add a comment to clarify why acpaths is required.

(From OE-Core rev: 1ef90df9c5cc628c885897027d8c5ec6f318d68e)

Signed-off-by: Ross Burton <ross.burton@intel.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>

1 files changed, 2 insertions, 1 deletions

diff --git a/meta/recipes-devtools/bison/bison_3.0.4.bb b/meta/recipes-devtools/bison/bison_3.0.4.bb
index 7d066be0ad..e5ac5672f8 100644
--- a/meta/recipes-devtools/bison/bison_3.0.4.bb
+++ b/meta/recipes-devtools/bison/bison_3.0.4.bb
@@ -10,7 +10,6 @@ SECTION = "devel"
 DEPENDS = "bison-native flex-native"
 
 SRC_URI = "${GNU_MIRROR}/bison/bison-${PV}.tar.xz \
-           file://m4.patch \
            file://0001-Unset-need_charset_alias-when-building-for-musl.patch \
            file://dont-depend-on-help2man.patch.patch \
            file://0001-src-local.mk-fix-parallel-issue.patch \
@@ -26,6 +25,8 @@ SRC_URI[sha256sum] = "a72428c7917bdf9fa93cb8181c971b6e22834125848cf1d03ce10b1bb0
 DEPENDS_class-native = "gettext-minimal-native"
 
 inherit autotools gettext texinfo
+
+# The automatic m4 path detection gets confused, so force the right value
 acpaths = "-I ${S}/m4"
 
 do_compile_prepend() {