5 files changed, 9 insertions, 2 deletions
diff --git a/libc/stdio/perror.c b/libc/stdio/perror.c
index 26a0cebd9..d69ccd5c3 100644
--- a/libc/stdio/perror.c
+++ b/libc/stdio/perror.c
@@ -11,7 +11,7 @@
 #warning CONSIDER: Increase buffer size for error message (non-%m case)?
 #endif
 
-void perror(register const char *s)
+void attribute_hidden __perror(register const char *s)
 {
 	/* If the program is calling perror, it's a safe bet that printf and
 	 * friends are used as well.  It is also possible that the calling
@@ -34,3 +34,4 @@ void perror(register const char *s)
 	}
 #endif
 }
+strong_alias(__perror,perror)
diff --git a/libc/stdio/popen.c b/libc/stdio/popen.c
index 2e9985a39..00c2d7bb1 100644
--- a/libc/stdio/popen.c
+++ b/libc/stdio/popen.c
@@ -16,6 +16,7 @@
 
 #define waitpid __waitpid
 #define execl __execl
+#define dup2 __dup2
 
 #include <stdio.h>
 #include <stdlib.h>
diff --git a/libc/stdio/scanf.c b/libc/stdio/scanf.c
index 98db1c3ac..c70cae4a1 100644
--- a/libc/stdio/scanf.c
+++ b/libc/stdio/scanf.c
@@ -47,6 +47,8 @@
 #define mbsrtowcs __mbsrtowcs
 #define mbrtowc __mbrtowc
 #define ungetc __ungetc
+#define ungetwc __ungetwc
+#define wcrtomb __wcrtomb
 
 #define _ISOC99_SOURCE			/* for LLONG_MAX primarily... */
 #define _GNU_SOURCE
diff --git a/libc/stdio/ungetwc.c b/libc/stdio/ungetwc.c
index cf4b9c488..c6a99dd9d 100644
--- a/libc/stdio/ungetwc.c
+++ b/libc/stdio/ungetwc.c
@@ -12,7 +12,7 @@
  * as reset stream->__ungot_width[1] for use by _stdio_adjpos().
  */
 
-wint_t ungetwc(wint_t c, register FILE *stream)
+wint_t attribute_hidden __ungetwc(wint_t c, register FILE *stream)
 {
 	__STDIO_AUTO_THREADLOCK_VAR;
 
@@ -46,3 +46,4 @@ wint_t ungetwc(wint_t c, register FILE *stream)
 
 	return c;
 }
+strong_alias(__ungetwc,ungetwc)
diff --git a/libc/stdio/vfprintf.c b/libc/stdio/vfprintf.c
index e3f389a6b..5275f53f7 100644
--- a/libc/stdio/vfprintf.c
+++ b/libc/stdio/vfprintf.c
@@ -93,6 +93,8 @@
 #define wcsnlen __wcsnlen
 #define wcsrtombs __wcsrtombs
 #define mbsrtowcs __mbsrtowcs
+#define btowc __btowc
+#define wcrtomb __wcrtomb
 
 #define _ISOC99_SOURCE			/* for ULLONG primarily... */
 #define _GNU_SOURCE