sync code with last improvements from OpenBSD

dist/libepoxy/include/epoxy/common.h

@@ -0,0 +1,63 @@
+/*
+ * Copyright 2017  Emmanuele Bassi 
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a
+ * copy of this software and associated documentation files (the "Software"),
+ * to deal in the Software without restriction, including without limitation
+ * the rights to use, copy, modify, merge, publish, distribute, sublicense,
+ * and/or sell copies of the Software, and to permit persons to whom the
+ * Software is furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice (including the next
+ * paragraph) shall be included in all copies or substantial portions of the
+ * Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
+ * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
+ * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS
+ * IN THE SOFTWARE.
+ */
+
+/** @file common.h
+ *
+ * A common header file, used to define macros and shared symbols.
+ */
+
+#ifndef EPOXY_COMMON_H
+#define EPOXY_COMMON_H
+
+#ifdef __cplusplus
+# define EPOXY_BEGIN_DECLS      extern "C" {
+# define EPOXY_END_DECLS        }
+#else
+# define EPOXY_BEGIN_DECLS
+# define EPOXY_END_DECLS
+#endif
+
+#ifndef EPOXY_PUBLIC
+# if defined(_MSC_VER)
+#  define EPOXY_PUBLIC __declspec(dllimport) extern
+# else
+#  define EPOXY_PUBLIC extern
+# endif
+#endif
+
+#if defined(_MSC_VER) && !defined(__bool_true_false_are_defined) && (_MSC_VER < 1800)
+typedef unsigned char bool;
+# define false 0
+# define true 1
+#else
+# include <stdbool.h>
+#endif
+
+EPOXY_BEGIN_DECLS
+
+EPOXY_PUBLIC bool epoxy_extension_in_string(const char *extension_list,
+                                            const char *ext);
+
+EPOXY_END_DECLS
+
+#endif /* EPOXY_COMMON_H */