4 files changed, 15 insertions, 7 deletions
diff --git a/libc/misc/regex/regcomp.c b/libc/misc/regex/regcomp.c
index 94e0314b5..471ea55f0 100644
--- a/libc/misc/regex/regcomp.c
+++ b/libc/misc/regex/regcomp.c
@@ -532,7 +532,7 @@ regerror (errcode, preg, errbuf, errbuf_size)
     {
       if (BE (msg_size > errbuf_size, 0))
 	{
-#if defined HAVE_MEMPCPY || defined _LIBC
+#if (defined HAVE_MEMPCPY || defined _LIBC) && defined __USE_GNU
 	  *((char *) __mempcpy (errbuf, msg, errbuf_size - 1)) = '\0';
 #else
 	  memcpy (errbuf, msg, errbuf_size - 1);
diff --git a/libc/misc/regex/regex.c b/libc/misc/regex/regex.c
index 77c09a011..9328f6025 100644
--- a/libc/misc/regex/regex.c
+++ b/libc/misc/regex/regex.c
@@ -28,7 +28,9 @@
 #ifdef __UCLIBC__
 #undef _LIBC
 #define _REGEX_RE_COMP
-#define HAVE_MEMPCPY
+#ifdef __USE_GNU
+# define HAVE_MEMPCPY
+#endif
 #define HAVE_LANGINFO
 #define HAVE_LANGINFO_CODESET
 #include <stdbool.h>
@@ -83,8 +85,10 @@ libc_hidden_proto(strlen)
 libc_hidden_proto(strncpy)
 libc_hidden_proto(getenv)
 libc_hidden_proto(strcasecmp)
-libc_hidden_proto(mempcpy)
 libc_hidden_proto(abort)
+#ifdef __USE_GNU
+libc_hidden_proto(mempcpy)
+#endif
 
 #endif
 
diff --git a/libc/misc/regex/regex_old.c b/libc/misc/regex/regex_old.c
index 29640734d..cf5843ec5 100644
--- a/libc/misc/regex/regex_old.c
+++ b/libc/misc/regex/regex_old.c
@@ -26,7 +26,9 @@
 #ifdef __UCLIBC__
 # undef _LIBC
 # define _REGEX_RE_COMP
-# define HAVE_MEMPCPY
+# ifdef __USE_GNU
+#  define HAVE_MEMPCPY
+# endif
 # define STDC_HEADERS
 # define RE_TRANSLATE_TYPE char *
 #endif
@@ -41,8 +43,10 @@ libc_hidden_proto(memcpy)
 libc_hidden_proto(strcmp)
 libc_hidden_proto(strlen)
 libc_hidden_proto(printf)
-libc_hidden_proto(mempcpy)
 libc_hidden_proto(abort)
+#ifdef __USE_GNU
+libc_hidden_proto(mempcpy)
+#endif
 
 /* AIX requires this to be the first thing in the file. */
 #if defined _AIX && !defined REGEX_MALLOC
@@ -8281,7 +8285,7 @@ regerror (errcode, preg, errbuf, errbuf_size)
     {
       if (msg_size > errbuf_size)
         {
-#if defined HAVE_MEMPCPY || defined _LIBC
+#if (defined HAVE_MEMPCPY || defined _LIBC) && defined __USE_GNU
 	  *((char *) mempcpy (errbuf, msg, errbuf_size - 1)) = '\0';
 #else
           memcpy (errbuf, msg, errbuf_size - 1);
diff --git a/libc/misc/regex/regexec.c b/libc/misc/regex/regexec.c
index bafc34ce0..2c8917e19 100644
--- a/libc/misc/regex/regexec.c
+++ b/libc/misc/regex/regexec.c
@@ -385,7 +385,7 @@ re_search_2_stub (bufp, string1, length1, string2, length2, start, range, regs,
 
 	if (BE (s == NULL, 0))
 	  return -2;
-#if defined _LIBC || defined __UCLIBC__
+#if (defined _LIBC || defined __UCLIBC__) && defined __USE_GNU
 	memcpy (__mempcpy (s, string1, length1), string2, length2);
 #else
 	memcpy (s, string1, length1);