Fix Z_SOLO mode

Without this patch, #include <zlib.h> with Z_SOLO defined
(e.g. while building perl 5.34.0) fails because of use of
undefined types.

diff --git a/zlib.h b/zlib.h
index 6852dc67bcff992daecbeebea96451836d56e1e0..842559485d40b7e9ee9458defa94c2e4c4fac341 100644 (file)
--- a/zlib.h
+++ b/zlib.h
@@ -1767,6 +1767,7 @@ Z_EXTERN int Z_EXPORT inflateBackInit_(z_stream *strm, int windowBits, unsigned
                         inflateBackInit_((strm), (windowBits), (window), ZLIB_VERSION, (int)sizeof(z_stream))
 
 
+#ifndef Z_SOLO
 /* gzgetc() macro and its supporting function and exposed data structure.  Note
  * that the real internal state is much larger than the exposed structure.
  * This abbreviated structure exposes just enough for the gzgetc() macro.  The
@@ -1797,6 +1798,7 @@ Z_EXTERN int Z_EXPORT gzgetc_(gzFile file);  /* backward compatibility */
    Z_EXTERN unsigned long Z_EXPORT crc32_combine64(unsigned long, unsigned long, z_off64_t);
    Z_EXTERN void Z_EXPORT crc32_combine_gen64(uint32_t *op, z_off64_t);
 #endif
+#endif
 
 #if !defined(Z_INTERNAL) && defined(Z_WANT64)
 #    define gzopen gzopen64
@@ -1835,10 +1837,12 @@ Z_EXTERN unsigned long    Z_EXPORT inflateCodesUsed (z_stream *);
 Z_EXTERN int              Z_EXPORT inflateResetKeep (z_stream *);
 Z_EXTERN int              Z_EXPORT deflateResetKeep (z_stream *);
 
+#ifndef Z_SOLO
 #if defined(_WIN32)
     Z_EXTERN gzFile Z_EXPORT gzopen_w(const wchar_t *path, const char *mode);
 #endif
 Z_EXTERN int Z_EXPORTVA gzvprintf(gzFile file, const char *format, va_list va);
+#endif
 
 #ifdef __cplusplus
 }