--- /dev/null
+#include "ppport.h"
+
+/* The MUTABLE_*() macros cast pointers to the types shown, in such a way
+ * (compiler permitting) that casting away const-ness will give a warning;
+ * e.g.:
+ *
+ * const SV *sv = ...;
+ * AV *av1 = (AV*)sv; <== BAD: the const has been silently cast away
+ * AV *av2 = MUTABLE_AV(sv); <== GOOD: it may warn
+ */
+
+#ifndef MUTABLE_PTR
+# if defined(__GNUC__) && !defined(PERL_GCC_BRACE_GROUPS_FORBIDDEN)
+# define MUTABLE_PTR(p) ({ void *_p = (p); _p; })
+# else
+# define MUTABLE_PTR(p) ((void *) (p))
+# endif
+
+# define MUTABLE_AV(p) ((AV *)MUTABLE_PTR(p))
+# define MUTABLE_CV(p) ((CV *)MUTABLE_PTR(p))
+# define MUTABLE_GV(p) ((GV *)MUTABLE_PTR(p))
+# define MUTABLE_HV(p) ((HV *)MUTABLE_PTR(p))
+# define MUTABLE_IO(p) ((IO *)MUTABLE_PTR(p))
+# define MUTABLE_SV(p) ((SV *)MUTABLE_PTR(p))
+#endif
+
+#ifndef SvPVx_nolen_const
+# if defined(__GNUC__) && !defined(PERL_GCC_BRACE_GROUPS_FORBIDDEN)
+# define SvPVx_nolen_const(sv) ({SV *_sv = (sv); SvPV_nolen_const(_sv); })
+# else
+# define SvPVx_nolen_const(sv) (SvPV_nolen_const(sv))
+# endif
+#endif
+
+#ifndef PERL_ARGS_ASSERT_CK_WARNER
+static void Perl_ck_warner(pTHX_ U32 err, const char* pat, ...);
+
+# ifdef vwarner
+static
+void
+Perl_ck_warner(pTHX_ U32 err, const char* pat, ...)
+{
+ va_list args;
+
+ PERL_UNUSED_ARG(err);
+ if (ckWARN(err)) {
+ va_list args;
+ va_start(args, pat);
+ vwarner(err, pat, &args);
+ va_end(args);
+ }
+}
+# else
+/* yes this replicates my_warner */
+static
+void
+Perl_ck_warner(pTHX_ U32 err, const char* pat, ...)
+{
+ SV *sv;
+ va_list args;
+
+ PERL_UNUSED_ARG(err);
+
+ va_start(args, pat);
+ sv = vnewSVpvf(pat, &args);
+ va_end(args);
+ sv_2mortal(sv);
+ warn("%s", SvPV_nolen(sv));
+}
+# endif
+#endif
+
+#define PERL_VERSION_DECIMAL(r,v,s) (r*1000000 + v*1000 + s)
+#define PERL_DECIMAL_VERSION \
+ PERL_VERSION_DECIMAL(PERL_REVISION,PERL_VERSION,PERL_SUBVERSION)
+#define PERL_VERSION_LT(r,v,s) \
+ (PERL_DECIMAL_VERSION < PERL_VERSION_DECIMAL(r,v,s))
+#define PERL_VERSION_GE(r,v,s) \
+ (PERL_DECIMAL_VERSION >= PERL_VERSION_DECIMAL(r,v,s))
+
+#define ISA_CLASS_OBJ(v,c) (sv_isobject(v) && sv_derived_from(v,c))
+
+#if PERL_VERSION_GE(5,9,0)
+
+# define VUTIL_REPLACE_CORE 1
+
+const char * Perl_scan_version2(pTHX_ const char *s, SV *rv, bool qv);
+SV * Perl_new_version2(pTHX_ SV *ver);
+SV * Perl_upg_version2(pTHX_ SV *sv, bool qv);
+SV * Perl_vstringify2(pTHX_ SV *vs);
+SV * Perl_vverify2(pTHX_ SV *vs);
+SV * Perl_vnumify2(pTHX_ SV *vs);
+SV * Perl_vnormal2(pTHX_ SV *vs);
+SV * Perl_vstringify2(pTHX_ SV *vs);
+int Perl_vcmp2(pTHX_ SV *lsv, SV *rsv);
+const char * Perl_prescan_version2(pTHX_ const char *s, bool strict, const char** errstr, bool *sqv, int *ssaw_decimal, int *swidth, bool *salpha);
+
+# define SCAN_VERSION(a,b,c) Perl_scan_version2(aTHX_ a,b,c)
+# define NEW_VERSION(a) Perl_new_version2(aTHX_ a)
+# define UPG_VERSION(a,b) Perl_upg_version2(aTHX_ a, b)
+# define VSTRINGIFY(a) Perl_vstringify2(aTHX_ a)
+# define VVERIFY(a) Perl_vverify2(aTHX_ a)
+# define VNUMIFY(a) Perl_vnumify2(aTHX_ a)
+# define VNORMAL(a) Perl_vnormal2(aTHX_ a)
+# define VCMP(a,b) Perl_vcmp2(aTHX_ a,b)
+# define PRESCAN_VERSION(a,b,c,d,e,f,g) Perl_prescan_version2(aTHX_ a,b,c,d,e,f,g)
+# define is_LAX_VERSION(a,b) \
+ (a != Perl_prescan_version2(aTHX_ a, FALSE, b, NULL, NULL, NULL, NULL))
+# define is_STRICT_VERSION(a,b) \
+ (a != Perl_prescan_version2(aTHX_ a, TRUE, b, NULL, NULL, NULL, NULL))
+
+#else
+
+const char * Perl_scan_version(pTHX_ const char *s, SV *rv, bool qv);
+SV * Perl_new_version(pTHX_ SV *ver);
+SV * Perl_upg_version(pTHX_ SV *sv, bool qv);
+SV * Perl_vverify(pTHX_ SV *vs);
+SV * Perl_vnumify(pTHX_ SV *vs);
+SV * Perl_vnormal(pTHX_ SV *vs);
+SV * Perl_vstringify(pTHX_ SV *vs);
+int Perl_vcmp(pTHX_ SV *lsv, SV *rsv);
+const char * Perl_prescan_version(pTHX_ const char *s, bool strict, const char** errstr, bool *sqv, int *ssaw_decimal, int *swidth, bool *salpha);
+
+# define SCAN_VERSION(a,b,c) Perl_scan_version(aTHX_ a,b,c)
+# define NEW_VERSION(a) Perl_new_version(aTHX_ a)
+# define UPG_VERSION(a,b) Perl_upg_version(aTHX_ a, b)
+# define VSTRINGIFY(a) Perl_vstringify(aTHX_ a)
+# define VVERIFY(a) Perl_vverify(aTHX_ a)
+# define VNUMIFY(a) Perl_vnumify(aTHX_ a)
+# define VNORMAL(a) Perl_vnormal(aTHX_ a)
+# define VCMP(a,b) Perl_vcmp(aTHX_ a,b)
+
+# define PRESCAN_VERSION(a,b,c,d,e,f,g) Perl_prescan_version(aTHX_ a,b,c,d,e,f,g)
+# define is_LAX_VERSION(a,b) \
+ (a != Perl_prescan_version(aTHX_ a, FALSE, b, NULL, NULL, NULL, NULL))
+# define is_STRICT_VERSION(a,b) \
+ (a != Perl_prescan_version(aTHX_ a, TRUE, b, NULL, NULL, NULL, NULL))
+
+#endif
+
+#if PERL_VERSION_LT(5,11,4)
+# define BADVERSION(a,b,c) \
+ if (b) { \
+ *b = c; \
+ } \
+ return a;
+
+# define PERL_ARGS_ASSERT_PRESCAN_VERSION \
+ assert(s); assert(sqv); assert(ssaw_decimal);\
+ assert(swidth); assert(salpha);
+
+# define PERL_ARGS_ASSERT_SCAN_VERSION \
+ assert(s); assert(rv)
+# define PERL_ARGS_ASSERT_NEW_VERSION \
+ assert(ver)
+# define PERL_ARGS_ASSERT_UPG_VERSION \
+ assert(ver)
+# define PERL_ARGS_ASSERT_VVERIFY \
+ assert(vs)
+# define PERL_ARGS_ASSERT_VNUMIFY \
+ assert(vs)
+# define PERL_ARGS_ASSERT_VNORMAL \
+ assert(vs)
+# define PERL_ARGS_ASSERT_VSTRINGIFY \
+ assert(vs)
+# define PERL_ARGS_ASSERT_VCMP \
+ assert(lhv); assert(rhv)
+# define PERL_ARGS_ASSERT_CK_WARNER \
+ assert(pat)
+#endif