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Since the 2.16 release of the glibc, 'gets' is not any more defined in the gnulib.
No tar version synchronized with gnulib since [1] has been released yet.
This patch avoids the following error occurs when building tar <=1.4.16 on host using
a glibc >=2.16:
make[5]: Entering directory `/home/samuel/data/workspace/src/buildroot/master/output/build/host-tar-1.26/gnu'
CC areadlink.o
CC areadlinkat.o
CC argp-ba.o
CC argp-eexst.o
CC argp-fmtstream.o
CC argp-fs-xinl.o
In file included from argp.h:24:0,
from argp-eexst.c:27:
./stdio.h:479:1: error ‘gets’ undeclared here (not in a function)
make[5]: *** [argp-eexst.o] Error 1
make[5]: *** Waiting for unfinished jobs....
In file included from argp-fmtstream.h:29:0,
from argp-fs-xinl.c:28:
./stdio.h:479:1: error ‘gets’ undeclared here (not in a function)
make[5]: *** [argp-fs-xinl.o] Error 1
In file included from argp-fmtstream.h:29:0,
from argp-fmtstream.c:35:
./stdio.h:479:1: error ‘gets’ undeclared here (not in a function)
make[5]: *** [argp-fmtstream.o] Error 1
References:
[1] http://git.savannah.gnu.org/gitweb/?p=gnulib.git;a=commitdiff;h=66712c23388e93e5c518ebc8515140fa0c807348
[2] http://sources.gentoo.org/cgi-bin/viewvc.cgi/gentoo-x86/sys-devel/m4/files/m4-1.4.16-no-gets.patch?diff_format=h&revision=1.1&view=markup
Signed-off-by: Samuel Martin <s.martin49@gmail.com>
---
diff -purN host-tar-1.26.orig/gnu/stdio.in.h host-tar-1.26/gnu/stdio.in.h
--- host-tar-1.26.orig/gnu/stdio.in.h 2012-07-21 21:17:12.392403084 +0200
+++ host-tar-1.26/gnu/stdio.in.h 2012-07-21 21:18:27.991993525 +0200
@@ -164,7 +164,9 @@ _GL_WARN_ON_USE (fflush, "fflush is not
so any use of gets warrants an unconditional warning. Assume it is
always declared, since it is required by C89. */
#undef gets
+#if defined(__GLIBC__) && !defined(__UCLIBC__) && !__GLIBC_PREREQ(2, 16)
_GL_WARN_ON_USE (gets, "gets is a security hole - use fgets instead");
+#endif
#if @GNULIB_FOPEN@
# if @REPLACE_FOPEN@
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