diff --git a/autotools/bison/bison.py b/autotools/bison/bison.py
new file mode 100644
index 00000000..47f9b4e4
--- /dev/null
+++ b/autotools/bison/bison.py
@@ -0,0 +1,28 @@
+# -*- coding: utf-8 -*-
+import info
+from Package.AutoToolsPackageBase import *
+
+
+class subinfo(info.infoclass):
+    def setDependencies(self):
+        self.buildDependencies["dev-util/msys"] = "default"
+        self.runtimeDependencies["virtual/base"] = "default"
+
+    def setTargets(self):
+        self.description = "Bison is a general-purpose parser generator that converts an annotated context-free grammar into a deterministic LR or generalized LR (GLR) parser employing LALR(1) parser tables"
+        self.svnTargets['master'] = 'git://git.savannah.gnu.org/bison.git'
+        for ver in ["3.0.4"]:
+            self.targets[ver] = f"http://ftp.gnu.org/gnu/bison/bison-{ver}.tar.xz"
+            self.targetInstSrc[ver] = f"bison-{ver}"
+        self.defaultTarget = '3.0.4'
+        self.patchToApply["3.0.4"] = [("vasnprintf-macos.diff", 1)]
+
+
+class Package(AutoToolsPackageBase):
+    def __init__( self, **args ):
+        AutoToolsPackageBase.__init__( self )
+
+    def install( self ):
+        if not AutoToolsPackageBase.install(self):
+            return False
+        return self.copyToMsvcImportLib()
diff --git a/autotools/bison/vasnprintf-macos.diff b/autotools/bison/vasnprintf-macos.diff
new file mode 100644
index 00000000..7d347e12
--- /dev/null
+++ b/autotools/bison/vasnprintf-macos.diff
@@ -0,0 +1,30 @@
+Binary files bison-3.0.4.orig/.DS_Store and bison-3.0.4/.DS_Store differ
+diff -Nrub -x '*~' -x '*\.rej' -x '*\.orig' -x'*\.o' -x '*\.pyc' bison-3.0.4.orig/lib/vasnprintf.c bison-3.0.4/lib/vasnprintf.c
+--- bison-3.0.4.orig/lib/vasnprintf.c	2015-01-04 17:46:03.000000000 +0100
++++ bison-3.0.4/lib/vasnprintf.c	2018-03-12 14:23:57.000000000 +0100
+@@ -4858,7 +4858,10 @@
+ #endif
+                   *fbp = dp->conversion;
+ #if USE_SNPRINTF
+-# if !(((__GLIBC__ > 2 || (__GLIBC__ == 2 && __GLIBC_MINOR__ >= 3)) && !defined __UCLIBC__) || ((defined _WIN32 || defined __WIN32__) && ! defined __CYGWIN__))
++# if ! (((__GLIBC__ > 2 || (__GLIBC__ == 2 && __GLIBC_MINOR__ >= 3))        \
++         && !defined __UCLIBC__)                                            \
++        || (defined __APPLE__ && defined __MACH__)                          \
++        || ((defined _WIN32 || defined __WIN32__) && ! defined __CYGWIN__))
+                 fbp[1] = '%';
+                 fbp[2] = 'n';
+                 fbp[3] = '\0';
+@@ -4872,6 +4875,13 @@
+                    in format strings in writable memory may crash the program
+                    (if compiled with _FORTIFY_SOURCE=2), so we should avoid it
+                    in this situation.  */
++                /* On Mac OS X 10.3 or newer, we know that snprintf's return
++                   value conforms to ISO C 99: the tests gl_SNPRINTF_RETVAL_C99
++                   and gl_SNPRINTF_TRUNCATION_C99 pass.
++                   Therefore we can avoid using %n in this situation.
++                   On Mac OS X 10.13 or newer, the use of %n in format strings
++                   in writable memory by default crashes the program, so we
++                   should avoid it in this situation.  */
+                 /* On native Windows systems (such as mingw), we can avoid using
+                    %n because:
+                      - Although the gl_SNPRINTF_TRUNCATION_C99 test fails,