util: Wrap __has_include()

3 files changed, 8 insertions, 6 deletions

diff --git a/mtab.c b/mtab.c
index 4d9e1d8..a35641d 100644
--- a/mtab.c
+++ b/mtab.c
@@ -24,11 +24,7 @@
 #include <sys/stat.h>
 #include <sys/types.h>
 
-#ifndef __has_include
-#	define __has_include(header) 0
-#endif
-
-#if __GLIBC__ || __has_include(<mntent.h>)
+#if __GLIBC__ || BFS_HAS_INCLUDE(<mntent.h>)
 #	define BFS_MNTENT 1
 #elif BSD
 #	define BFS_MNTINFO 1
diff --git a/util.c b/util.c
index 64785be..7f68e7c 100644
--- a/util.c
+++ b/util.c
@@ -30,7 +30,7 @@
 #include <sys/types.h>
 #include <unistd.h>
 
-#if __GLIBC__ || __has_include(<sys/sysmacros.h>)
+#if __GLIBC__ || BFS_HAS_INCLUDE(<sys/sysmacros.h>)
 #	include <sys/sysmacros.h>
 #endif
 
diff --git a/util.h b/util.h
index 18fc318..920d6e9 100644
--- a/util.h
+++ b/util.h
@@ -28,6 +28,12 @@
 
 // Some portability concerns
 
+#ifdef __has_include
+#	define BFS_HAS_INCLUDE(header) __has_include(header)
+#else
+#	define BFS_HAS_INCLUDE(header) false
+#endif
+
 #if !defined(FNM_CASEFOLD) && defined(FNM_IGNORECASE)
 #	define FNM_CASEFOLD FNM_IGNORECASE
 #endif