+
+/* pcre2 used to provide its "POSIX" entrypoints using the same names as the
+ * standard ones in the C runtime, but that never worked because the linker
+ * would use the C runtime. Debian patched the library to fix this symbol
+ * conflict, but overlooked the header file, and Debian's patch was made
+ * obsolete when pcre2 was changed early in 2019 to provide different names.
+ *
+ * Here is a workaround to make the older version of Debian's package work.
+ */
+#if !defined(PCRE2regcomp) && defined(HAVE_PCRE2REGCOMP)
+
+#undef regcomp
+#undef regexec
+#undef regfree
+
+#ifdef __cplusplus
+extern "C"
+{
+#endif
+ PCRE2POSIX_EXP_DECL int PCRE2regcomp(regex_t *, const char *, int);
+ PCRE2POSIX_EXP_DECL int PCRE2regexec(const regex_t *, const char *, size_t,
+ regmatch_t *, int);
+ PCRE2POSIX_EXP_DECL void PCRE2regfree(regex_t *);
+#ifdef __cplusplus
+} /* extern "C" */
+#endif
+#define regcomp(r,s,n) PCRE2regcomp(r,s,n)
+#define regexec(r,s,n,m,x) PCRE2regexec(r,s,n,m,x)
+#define regfree(r) PCRE2regfree(r)
+#endif
+/* end workaround... */