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.

2 files changed, 17 insertions, 0 deletions

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>