Hi,

This patch works for me: 
--- libdeflate-one.c_orig       2021-02-20 17:12:44 +1100
+++ libdeflate-one.c    2021-02-20 17:23:26 +1100
@@ -27,6 +27,10 @@

 /* #include "lib_common.h" */

+#ifdef WIN32
+#undef malloc
+#undef free
+#endif

 #ifndef LIB_LIB_COMMON_H
 #define LIB_LIB_COMMON_H

[download]
This issue with free/malloc on Windows is not unique to Gzip::Libdeflate.
Update: Added "#ifdef WIN32" to provide portability.

'Nother Update:

On my Perl XSUB.h defines free as above, but I don't understand what this error even means, since it is coming from a #define line where what is on the right shouldn't matter.

Aaah ... but it does matter in libdeflate-one.c, where free (and malloc) need to be implemented according to the stdlib.h specification, not according to perl's (re)definition of them.
By undef'ing those 2 symbols, we ensure that the stdlib.h implementations are used.

Cheers,
Rob

In reply to Re: Baffling compilation errors from Strawberry Perl by syphilis
in thread Baffling compilation errors from Strawberry Perl by no longer just digit

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