Thanks, we'll consider that suggestion.

It might break cygwin, or make it behave differently, thus my comment at the bottom.

Windows is definitely a target OS

Good to hear. In addition to the OP getting a porting error, my initial assumption that Windows wasn't supported was based on the complete lack of cpan testers reports for the OS. Further checking reveals some for older versions. I guess they haven't gotten around to 0.313 yet.

C:\MinGW\include\dirent.h
C:\MinGW\share\libtool\libltdl\lt__dirent.c
C:\MinGW\share\libtool\libltdl\libltdl\lt__dirent.h
[download]

I also get a bunch of these warnings

warning: incompatible implicit declaration of built-in function 'alloc
+a'
[download]

On Thu, Sep 16, 2004 at 08:55:50AM -0400, Kaveh R. Ghazi wrote:
> +/* GCC always provides __builtin_alloca(x).  */
> +#ifndef alloca
> +#define alloca(x) __builtin_alloca(x)
> +#endif

Should be #undef, not #ifndef.
[download]

The alloca issue may be addressed by this patch, which requires a full rebuild (perl Build realclean; perl Build.PL; perl Build test):

Index: charmonizer/src/Charmonizer/Probe/Memory.c
===================================================================
--- charmonizer/src/Charmonizer/Probe/Memory.c    (revision 6525)
+++ charmonizer/src/Charmonizer/Probe/Memory.c    (revision 6526)
@@ -72,7 +72,7 @@
     }
 
     /* Windows. */
-    if (!has_alloca || has_builtin_alloca) {
+    if (!(has_alloca || has_builtin_alloca)) {
         sprintf(code_buf, alloca_code, "malloc.h", "alloca");
         if (CC_test_compile(code_buf, strlen(code_buf))) {
             has_malloc_h = true;
@@ -81,7 +81,7 @@
             ConfWriter_append_conf("#define chy_alloca alloca\n");
         }
     }
-    if (!has_alloca || has_builtin_alloca) {
+    if (!(has_alloca || has_builtin_alloca)) {
         sprintf(code_buf, alloca_code, "malloc.h", "_alloca");
         if (CC_test_compile(code_buf, strlen(code_buf))) {
             has_malloc_h = true;
[download]