diff --git a/gnu/dist/libio/config/linuxlibc1.mt b/gnu/dist/libio/config/linuxlibc1.mt
index 90fa427225e3..742cbf185342 100644
--- a/gnu/dist/libio/config/linuxlibc1.mt
+++ b/gnu/dist/libio/config/linuxlibc1.mt
@@ -23,4 +23,4 @@ USER_INCLUDES=PlotFile.h SFile.h builtinbuf.h editbuf.h fstream.h \
 	streambuf.h strfile.h strstream.h libio.h
 
 # A bad kludge
-MT_CFLAGS=-D_G_HAVE_MMAP
+MT_CFLAGS=-D_G_HAVE_MMAP -D_G_STDIO_USES_LIBIO -D_G_HAVE_WEAK_SYMBOL
diff --git a/gnu/dist/libio/genops.c b/gnu/dist/libio/genops.c
index cbd8f0f1ea22..b899e150afab 100644
--- a/gnu/dist/libio/genops.c
+++ b/gnu/dist/libio/genops.c
@@ -937,6 +937,8 @@ __io_defs io_defs__;
 
 #ifdef weak_alias
 weak_alias (_IO_cleanup, _cleanup)
+#elif defined(_G_STDIO_USES_LIBIO) && defined(_G_HAVE_WEAK_SYMBOL)
+void _cleanup () __attribute__ ((weak, alias ("_IO_cleanup")));
 #endif
 
 #ifdef text_set_element
diff --git a/gnu/dist/libio/iofclose.c b/gnu/dist/libio/iofclose.c
index b6f18e58c2cd..7db336c5d539 100644
--- a/gnu/dist/libio/iofclose.c
+++ b/gnu/dist/libio/iofclose.c
@@ -55,8 +55,6 @@ _IO_fclose (fp)
 
 #ifdef weak_alias
 weak_alias (_IO_fclose, fclose)
-#else
-#ifdef __linux__
-#pragma weak fclose = _IO_fclose
-#endif
+#elif defined(_G_STDIO_USES_LIBIO) && defined(_G_HAVE_WEAK_SYMBOL)
+int fclose (_IO_FILE *) __attribute__ ((weak, alias("_IO_fclose")));
 #endif
diff --git a/gnu/dist/libio/iofeof.c b/gnu/dist/libio/iofeof.c
index d06de044fba5..7bf8cba285be 100644
--- a/gnu/dist/libio/iofeof.c
+++ b/gnu/dist/libio/iofeof.c
@@ -40,4 +40,6 @@ _IO_feof (fp)
 
 #ifdef weak_alias
 weak_alias (_IO_feof, feof)
+#elif defined(_G_STDIO_USES_LIBIO) && defined(_G_HAVE_WEAK_SYMBOL)
+int feof (_IO_FILE *) __attribute__ ((weak, alias("_IO_feof")));
 #endif
diff --git a/gnu/dist/libio/ioferror.c b/gnu/dist/libio/ioferror.c
index 855627ade66d..3019e796a1f6 100644
--- a/gnu/dist/libio/ioferror.c
+++ b/gnu/dist/libio/ioferror.c
@@ -40,4 +40,6 @@ _IO_ferror (fp)
 
 #ifdef weak_alias
 weak_alias (_IO_ferror, ferror)
+#elif defined(_G_STDIO_USES_LIBIO) && defined(_G_HAVE_WEAK_SYMBOL)
+int ferror (_IO_FILE *) __attribute__ ((weak, alias("_IO_ferror")));
 #endif
diff --git a/gnu/dist/libio/iogetc.c b/gnu/dist/libio/iogetc.c
index f7465f1914b1..6a11e47334dc 100644
--- a/gnu/dist/libio/iogetc.c
+++ b/gnu/dist/libio/iogetc.c
@@ -45,4 +45,6 @@ _IO_getc (fp)
 
 #ifdef weak_alias
 weak_alias (_IO_getc, getc)
+#elif defined(_G_STDIO_USES_LIBIO) && defined(_G_HAVE_WEAK_SYMBOL)
+int getc (_IO_FILE *) __attribute__ ((weak, alias("_IO_getc")));
 #endif
diff --git a/gnu/dist/libio/ioputc.c b/gnu/dist/libio/ioputc.c
index 3c35c365f07a..38a3ec9a00b7 100644
--- a/gnu/dist/libio/ioputc.c
+++ b/gnu/dist/libio/ioputc.c
@@ -39,4 +39,6 @@ _IO_putc (c, fp)
 
 #ifdef weak_alias
 weak_alias (_IO_putc, putc)
+#elif defined(_G_STDIO_USES_LIBIO) && defined(_G_HAVE_WEAK_SYMBOL)
+int putc (int, _IO_FILE *) __attribute__ ((weak, alias("_IO_putc")));
 #endif
diff --git a/gnu/dist/libio/iovsprintf.c b/gnu/dist/libio/iovsprintf.c
index 7b82591974d4..617a5888405d 100644
--- a/gnu/dist/libio/iovsprintf.c
+++ b/gnu/dist/libio/iovsprintf.c
@@ -54,8 +54,7 @@ _IO_vsprintf (string, format, args)
 
 #ifdef weak_alias
 weak_alias (_IO_vsprintf, vsprintf)
-#else
-#ifdef __linux__
-#pragma weak vsprintf = _IO_vsprintf
-#endif
+#elif defined(_G_STDIO_USES_LIBIO) && defined(_G_HAVE_WEAK_SYMBOL)
+int vsprintf (char *, const char *, _IO_va_list)
+	      __attribute__ ((weak, alias("_IO_vsprintf")));
 #endif
diff --git a/gnu/dist/libio/iovsscanf.c b/gnu/dist/libio/iovsscanf.c
index beb0bc3a6b22..6bdc3ccf0182 100644
--- a/gnu/dist/libio/iovsscanf.c
+++ b/gnu/dist/libio/iovsscanf.c
@@ -51,8 +51,9 @@ _IO_vsscanf (string, format, args)
 #ifdef weak_alias
 weak_alias (_IO_vsscanf, __vsscanf)
 weak_alias (_IO_vsscanf, vsscanf)
-#else
-#ifdef __linux__
-#pragma weak vsscanf = _IO_vsscanf
-#endif
+#elif defined(_G_STDIO_USES_LIBIO) && defined(_G_HAVE_WEAK_SYMBOL)
+int __vsscanf (const char *, const char *, _IO_va_list)
+	    __attribute__ ((weak, alias("_IO_vsscanf")));
+int vsscanf (const char *, const char *, _IO_va_list)
+	    __attribute__ ((weak, alias("_IO_vsscanf")));
 #endif