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Use libc_hidden_* for tolower, toupper (bug 15105)

Continuing the fixes for localplt test failures with -Os arising from
functions not being inlined in that case, this patch fixes such
failures for tolower and toupper by using libc_hidden_proto and

Tested for x86_64 (both that it removes this particular localplt
failure for -Os, and that the testsuite continues to pass without
-Os).  Together with my patch
<> for atoi
(pending review), this completes fixing such localplt failures for -Os
(at least for x86_64).

2018-02-22  Joseph Myers  <>

	[BZ #15105]
	* ctype/ctype.c (tolower): Use libc_hidden_def.
	(toupper): Likewise.
	* include/ctype.h [!_ISOMAC] (tolower): Use libc_hidden_proto.
	[!_ISOMAC] (toupper): Likewise.

diff --git a/ctype/ctype.c b/ctype/ctype.c
index e86c5b0..6cb8000 100644
--- a/ctype/ctype.c
+++ b/ctype/ctype.c
@@ -45,9 +45,11 @@ tolower (int c)
   return c >= -128 && c < 256 ? __ctype_tolower[c] : c;
+libc_hidden_def (tolower)
 toupper (int c)
   return c >= -128 && c < 256 ? __ctype_toupper[c] : c;
+libc_hidden_def (toupper)
diff --git a/include/ctype.h b/include/ctype.h
index ac6db79..493a6f8 100644
--- a/include/ctype.h
+++ b/include/ctype.h
@@ -11,6 +11,9 @@ libc_hidden_proto (__ctype_init)
    So defeat macro expansion with parens for this declaration.  */
 extern int (__isctype) (int __c, int __mask);
+libc_hidden_proto (tolower)
+libc_hidden_proto (toupper)
 # if IS_IN (libc)
 /* These accessors are used by the optimized macros to find the

Joseph S. Myers

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