From de699accf6804e8b1d8042b46c85500ee8c672c6 Mon Sep 17 00:00:00 2001
From: Rob Landley <rob@landley.net>
Date: Wed, 31 Dec 2014 16:22:31 -0600
Subject: When you include the posix header libgen.h, glibc #defines basename
 to some random other symbol name (because gnu) and this screws up nontrivial
 macro expansions of NEWTOY(basename), so work around it in portability.h.

---
 lib/portability.c    | 8 ++++++++
 lib/portability.h    | 9 +++++++++
 toys.h               | 1 -
 toys/posix/dirname.c | 1 +
 4 files changed, 18 insertions(+), 1 deletion(-)

diff --git a/lib/portability.c b/lib/portability.c
index 7d6d85f3..4fd1e224 100644
--- a/lib/portability.c
+++ b/lib/portability.c
@@ -6,6 +6,14 @@
 
 #include "toys.h"
 
+#if defined(__GLIBC__)
+#include <libgen.h>
+char *basename(char *path)
+{
+  return __xpg_basename(path);
+}
+#endif
+
 #if !defined(__uClinux__)
 pid_t xfork(void)
 {
diff --git a/lib/portability.h b/lib/portability.h
index 1464c656..8bbbdb25 100644
--- a/lib/portability.h
+++ b/lib/portability.h
@@ -60,6 +60,15 @@ int wcwidth(wchar_t wc);
 #include <time.h>
 char *strptime(const char *buf, const char *format, struct tm *tm);
 
+// They didn't like posix basename so they defined another function with the
+// same name and if you include libgen.h it #defines basename to something
+// else (where they implemented the real basename), and that define breaks
+// the table entry for the basename command. They didn't make a new function
+// with a different name for their new behavior because gnu.
+//
+// Implement our own in portability.c and don't use their broken header.
+char *basename(char *path);
+
 // uClibc pretends to be glibc and copied a lot of its bugs, but has a few more
 #if defined(__UCLIBC__)
 #include <unistd.h>
diff --git a/toys.h b/toys.h
index 6b5f87aa..3b508497 100644
--- a/toys.h
+++ b/toys.h
@@ -17,7 +17,6 @@
 #include <grp.h>
 #include <inttypes.h>
 #include <limits.h>
-#include <libgen.h>
 #include <math.h>
 #include <pwd.h>
 #include <regex.h>
diff --git a/toys/posix/dirname.c b/toys/posix/dirname.c
index 06470ad8..7f51e9f0 100644
--- a/toys/posix/dirname.c
+++ b/toys/posix/dirname.c
@@ -16,6 +16,7 @@ config DIRNAME
 */
 
 #include "toys.h"
+#include <libgen.h>
 
 void dirname_main(void)
 {
-- 
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