PATH_MAX is not defined on linux when building with `-std=c99`

[schodet]

Actually documentation says that it can be undefined if no real limit is applicable.

Would this be OK?:

diff --git a/tinydir.h b/tinydir.h
index 324f9f6..7863564 100644
--- a/tinydir.h
+++ b/tinydir.h
@@ -89,7 +89,9 @@ extern "C" {
 # define _TINYDIR_PATH_MAX MAX_PATH
 #elif defined  __linux__
 # include <limits.h>
-# define _TINYDIR_PATH_MAX PATH_MAX
+# ifdef PATH_MAX
+#  define _TINYDIR_PATH_MAX PATH_MAX
+# endif
 #elif defined(__unix__) || (defined(__APPLE__) && defined(__MACH__))
 # include <sys/param.h>
 # if defined(BSD)

[cxong]

which documentation is this?
I guess this change looks safe

[schodet]

Here is an extract from the glibc documentation:

Each of the following macros is defined in limits.h only if the system has a fixed, uniform limit for the parameter in question. If the system allows different file systems or files to have different limits, then the macro is undefined

https://www.gnu.org/software/libc/manual/html_node/Limits-for-Files.html#Limits-for-Files

[schodet]

Thanks :-)