glibc: remove version choice

We do not support uClibc-ng/musl C library version choice support,
do the same for GNU C Library.
No legacy handling required as only version choice is removed.

Signed-off-by: Waldemar Brodkorb <wbx@openadk.org>
Reviewed-by: Arnout Vandecappelle (Essensium/Mind) <arnout@mind.be>
[Thomas: move 3.2 kernel headers dependency to the libc choice in
toolchain/toolchain-buildroot/Config.in file, and added a Config.in
comment about it.]
Signed-off-by: Thomas Petazzoni <thomas.petazzoni@free-electrons.com>

package/glibc/2.23/0001-fix-CVE-2016-3075.patch

@@ -1,47 +0,0 @@
-From 146b58d11fddbef15b888906e3be4f33900c416f Mon Sep 17 00:00:00 2001
-From: Florian Weimer <fweimer@redhat.com>
-Date: Tue, 29 Mar 2016 12:57:56 +0200
-Subject: [PATCH 1/1] CVE-2016-3075: Stack overflow in _nss_dns_getnetbyname_r [BZ #19879]
-
-The defensive copy is not needed because the name may not alias the
-output buffer.
-
-(cherry picked from commit 317b199b4aff8cfa27f2302ab404d2bb5032b9a4)
-(cherry picked from commit 883dceebc8f11921a9890211a4e202e5be17562f)
-
-Signed-off-by: Bernd Kuhls <bernd.kuhls@t-online.de>
-(downloaded from upstream git repo and removed changes to files
- Changelog and NEWS:
- https://sourceware.org/git/gitweb.cgi?p=glibc.git;a=commitdiff;h=146b58d11fddbef15b888906e3be4f33900c416f;hp=0eb234232eaf925fe4dca3bd60a3e1b4a7ab2882)
----
- ChangeLog                    |    7 +++++++
- NEWS                         |   10 ++++++++--
- resolv/nss_dns/dns-network.c |    5 +----
- 3 files changed, 16 insertions(+), 6 deletions(-)
-
-diff --git a/resolv/nss_dns/dns-network.c b/resolv/nss_dns/dns-network.c
-index 2eb2f67..8f301a7 100644
---- a/resolv/nss_dns/dns-network.c
-+++ b/resolv/nss_dns/dns-network.c
-@@ -118,17 +118,14 @@ _nss_dns_getnetbyname_r (const char *name, struct netent *result,
-   } net_buffer;
-   querybuf *orig_net_buffer;
-   int anslen;
--  char *qbuf;
-   enum nss_status status;
- 
-   if (__res_maybe_init (&_res, 0) == -1)
-     return NSS_STATUS_UNAVAIL;
- 
--  qbuf = strdupa (name);
--
-   net_buffer.buf = orig_net_buffer = (querybuf *) alloca (1024);
- 
--  anslen = __libc_res_nsearch (&_res, qbuf, C_IN, T_PTR, net_buffer.buf->buf,
-+  anslen = __libc_res_nsearch (&_res, name, C_IN, T_PTR, net_buffer.buf->buf,
- 			       1024, &net_buffer.ptr, NULL, NULL, NULL, NULL);
-   if (anslen < 0)
-     {
--- 
-1.7.1
-

package/glibc/2.23/0002-gcc6.patch

@@ -1,88 +0,0 @@
-From 5769d5d17cdb4770f1e08167b76c1684ad4e1f73 Mon Sep 17 00:00:00 2001
-From: Yvan Roux <yvan.roux@linaro.org>
-Date: Fri, 15 Apr 2016 13:29:26 +0200
-Subject: [PATCH 1/1] Suppress GCC 6 warning about ambiguous 'else' with -Wparentheses
-
-(cherry picked from commit df1cf48777fe4cd81ad7fb09ecbe5b31432b7c1c)
-
-Signed-off-by: Bernd Kuhls <bernd.kuhls@t-online.de>
-(downloaded from upstream git repo and removed changes to Changelog:
- https://sourceware.org/git/gitweb.cgi?p=glibc.git;a=commitdiff;h=5769d5d17cdb4770f1e08167b76c1684ad4e1f73;hp=f1e182acaaa84e844eb96462a92ba532e1c1fff4)
----
- ChangeLog       |    5 +++++
- nis/nis_call.c  |   20 +++++++++++---------
- stdlib/setenv.c |   26 ++++++++++++++------------
- 3 files changed, 30 insertions(+), 21 deletions(-)
-
-diff --git a/nis/nis_call.c b/nis/nis_call.c
-index 3fa37e4..cb7839a 100644
---- a/nis/nis_call.c
-+++ b/nis/nis_call.c
-@@ -680,16 +680,18 @@ nis_server_cache_add (const_nis_name name, int search_parent,
-   /* Choose which entry should be evicted from the cache.  */
-   loc = &nis_server_cache[0];
-   if (*loc != NULL)
--    for (i = 1; i < 16; ++i)
--      if (nis_server_cache[i] == NULL)
--	{
-+    {
-+      for (i = 1; i < 16; ++i)
-+	if (nis_server_cache[i] == NULL)
-+	  {
-+	    loc = &nis_server_cache[i];
-+	    break;
-+	  }
-+	else if ((*loc)->uses > nis_server_cache[i]->uses
-+		 || ((*loc)->uses == nis_server_cache[i]->uses
-+		     && (*loc)->expires > nis_server_cache[i]->expires))
- 	  loc = &nis_server_cache[i];
--	  break;
--	}
--      else if ((*loc)->uses > nis_server_cache[i]->uses
--	       || ((*loc)->uses == nis_server_cache[i]->uses
--		   && (*loc)->expires > nis_server_cache[i]->expires))
--	loc = &nis_server_cache[i];
-+    }
-   old = *loc;
-   *loc = new;
- 
-diff --git a/stdlib/setenv.c b/stdlib/setenv.c
-index da61ee0..e66045f 100644
---- a/stdlib/setenv.c
-+++ b/stdlib/setenv.c
-@@ -278,18 +278,20 @@ unsetenv (const char *name)
-   ep = __environ;
-   if (ep != NULL)
-     while (*ep != NULL)
--      if (!strncmp (*ep, name, len) && (*ep)[len] == '=')
--	{
--	  /* Found it.  Remove this pointer by moving later ones back.  */
--	  char **dp = ep;
--
--	  do
--	    dp[0] = dp[1];
--	  while (*dp++);
--	  /* Continue the loop in case NAME appears again.  */
--	}
--      else
--	++ep;
-+      {
-+	if (!strncmp (*ep, name, len) && (*ep)[len] == '=')
-+	  {
-+	    /* Found it.  Remove this pointer by moving later ones back.  */
-+	    char **dp = ep;
-+
-+	    do
-+		dp[0] = dp[1];
-+	    while (*dp++);
-+	    /* Continue the loop in case NAME appears again.  */
-+	  }
-+	else
-+	  ++ep;
-+      }
- 
-   UNLOCK;
- 
--- 
-1.7.1
-

package/glibc/2.23/0003-MIPS-SPARC-fix-wrong-vfork-aliases-in-libpthread.so.patch

@@ -1,76 +0,0 @@
-From 43c2948756bb6e144c7b871e827bba37d61ad3a3 Mon Sep 17 00:00:00 2001
-From: Aurelien Jarno <aurelien@aurel32.net>
-Date: Sat, 18 Jun 2016 19:11:23 +0200
-Subject: [PATCH] MIPS, SPARC: fix wrong vfork aliases in libpthread.so
-
-With recent binutils versions the GNU libc fails to build on at least
-MISP and SPARC, with this kind of error:
-
-  /home/aurel32/glibc/glibc-build/nptl/libpthread.so:(*IND*+0x0): multiple definition of `vfork@GLIBC_2.0'
-  /home/aurel32/glibc/glibc-build/nptl/libpthread.so::(.text+0xee50): first defined here
-
-It appears that on these architectures pt-vfork.S includes vfork.S
-(through the alpha version of pt-vfork.S) and that the __vfork aliases
-are not conditionalized on IS_IN (libc) like on other architectures.
-Therefore the aliases are also wrongly included in libpthread.so.
-
-Fix this by properly conditionalizing the aliases like on other
-architectures.
-
-Changelog:
-	* sysdeps/unix/sysv/linux/mips/vfork.S (__vfork): Conditionalize
-	hidden_def, weak_alias and strong_alias on [IS_IN (libc)].
-	* sysdeps/unix/sysv/linux/sparc/sparc32/vfork.S: Likewise.
-	* sysdeps/unix/sysv/linux/sparc/sparc64/vfork.S: Likewise.
-
-[Vincent: do not patch ChangeLog]
-
-Signed-off-by: Vicente Olivert Riera <Vincent.Riera@imgtec.com>
----
- sysdeps/unix/sysv/linux/mips/vfork.S          | 2 ++
- sysdeps/unix/sysv/linux/sparc/sparc32/vfork.S | 2 ++
- sysdeps/unix/sysv/linux/sparc/sparc64/vfork.S | 2 ++
- 3 files changed, 6 insertions(+)
-
-diff --git a/sysdeps/unix/sysv/linux/mips/vfork.S b/sysdeps/unix/sysv/linux/mips/vfork.S
-index 8c66151..c0c0ce6 100644
---- a/sysdeps/unix/sysv/linux/mips/vfork.S
-+++ b/sysdeps/unix/sysv/linux/mips/vfork.S
-@@ -106,6 +106,8 @@ L(error):
- #endif
- 	END(__vfork)
- 
-+#if IS_IN (libc)
- libc_hidden_def(__vfork)
- weak_alias (__vfork, vfork)
- strong_alias (__vfork, __libc_vfork)
-+#endif
-diff --git a/sysdeps/unix/sysv/linux/sparc/sparc32/vfork.S b/sysdeps/unix/sysv/linux/sparc/sparc32/vfork.S
-index dc32e0a..94f2c8d 100644
---- a/sysdeps/unix/sysv/linux/sparc/sparc32/vfork.S
-+++ b/sysdeps/unix/sysv/linux/sparc/sparc32/vfork.S
-@@ -44,6 +44,8 @@ ENTRY(__vfork)
- 	 nop
- END(__vfork)
- 
-+#if IS_IN (libc)
- libc_hidden_def (__vfork)
- weak_alias (__vfork, vfork)
- strong_alias (__vfork, __libc_vfork)
-+#endif
-diff --git a/sysdeps/unix/sysv/linux/sparc/sparc64/vfork.S b/sysdeps/unix/sysv/linux/sparc/sparc64/vfork.S
-index 05be3c2..a7479e9 100644
---- a/sysdeps/unix/sysv/linux/sparc/sparc64/vfork.S
-+++ b/sysdeps/unix/sysv/linux/sparc/sparc64/vfork.S
-@@ -44,6 +44,8 @@ ENTRY(__vfork)
- 	 nop
- END(__vfork)
- 
-+#if IS_IN (libc)
- libc_hidden_def (__vfork)
- weak_alias (__vfork, vfork)
- strong_alias (__vfork, __libc_vfork)
-+#endif
--- 
-2.7.3
-

package/glibc/2.23/0004-MIPS-SPARC-more-fixes-to-the-vfork-aliases-in-libpth.patch

@@ -1,122 +0,0 @@
-From b87c1ec3fa398646f042a68f0ce0f7d09c1348c7 Mon Sep 17 00:00:00 2001
-From: Aurelien Jarno <aurelien@aurel32.net>
-Date: Tue, 21 Jun 2016 23:59:37 +0200
-Subject: [PATCH] MIPS, SPARC: more fixes to the vfork aliases in libpthread.so
-
-Commit 43c29487 tried to fix the vfork aliases in libpthread.so on MIPS
-and SPARC, but failed to do it correctly, introducing an ABI change.
-
-This patch does the remaining changes needed to align the MIPS and SPARC
-vfork implementations with the other architectures. That way the the
-alpha version of pt-vfork.S works correctly for MIPS and SPARC. The
-changes for alpha were done in 82aab97c.
-
-Changelog:
-	* sysdeps/unix/sysv/linux/mips/vfork.S (__vfork): Rename into
-	__libc_vfork.
-	(__vfork) [IS_IN (libc)]: Remove alias.
-	(__libc_vfork) [IS_IN (libc)]: Define as an alias.
-	* sysdeps/unix/sysv/linux/sparc/sparc32/vfork.S: Likewise.
-	* sysdeps/unix/sysv/linux/sparc/sparc64/vfork.S: Likewise.
-
-[Vincent: do not patch ChangeLog]
-
-Signed-off-by: Vicente Olivert Riera <Vincent.Riera@imgtec.com>
----
- sysdeps/unix/sysv/linux/mips/vfork.S          | 12 ++++++------
- sysdeps/unix/sysv/linux/sparc/sparc32/vfork.S |  8 ++++----
- sysdeps/unix/sysv/linux/sparc/sparc64/vfork.S |  8 ++++----
- 3 files changed, 14 insertions(+), 14 deletions(-)
-
-diff --git a/sysdeps/unix/sysv/linux/mips/vfork.S b/sysdeps/unix/sysv/linux/mips/vfork.S
-index c0c0ce6..1867c86 100644
---- a/sysdeps/unix/sysv/linux/mips/vfork.S
-+++ b/sysdeps/unix/sysv/linux/mips/vfork.S
-@@ -31,13 +31,13 @@
- LOCALSZ= 1
- FRAMESZ= (((NARGSAVE+LOCALSZ)*SZREG)+ALSZ)&ALMASK
- GPOFF= FRAMESZ-(1*SZREG)
--NESTED(__vfork,FRAMESZ,sp)
-+NESTED(__libc_vfork,FRAMESZ,sp)
- #ifdef __PIC__
- 	SETUP_GP
- #endif
- 	PTR_SUBU sp, FRAMESZ
- 	cfi_adjust_cfa_offset (FRAMESZ)
--	SETUP_GP64_REG (a5, __vfork)
-+	SETUP_GP64_REG (a5, __libc_vfork)
- #ifdef __PIC__
- 	SAVE_GP (GPOFF)
- #endif
-@@ -104,10 +104,10 @@ L(error):
- 	RESTORE_GP64_REG
- 	j		__syscall_error
- #endif
--	END(__vfork)
-+	END(__libc_vfork)
- 
- #if IS_IN (libc)
--libc_hidden_def(__vfork)
--weak_alias (__vfork, vfork)
--strong_alias (__vfork, __libc_vfork)
-+weak_alias (__libc_vfork, vfork)
-+strong_alias (__libc_vfork, __vfork)
-+libc_hidden_def (__vfork)
- #endif
-diff --git a/sysdeps/unix/sysv/linux/sparc/sparc32/vfork.S b/sysdeps/unix/sysv/linux/sparc/sparc32/vfork.S
-index 94f2c8d..0d0a3b5 100644
---- a/sysdeps/unix/sysv/linux/sparc/sparc32/vfork.S
-+++ b/sysdeps/unix/sysv/linux/sparc/sparc32/vfork.S
-@@ -21,7 +21,7 @@
- 
- 	.text
- 	.globl		__syscall_error
--ENTRY(__vfork)
-+ENTRY(__libc_vfork)
- 	ld	[%g7 + PID], %o5
- 	cmp	%o5, 0
- 	bne	1f
-@@ -42,10 +42,10 @@ ENTRY(__vfork)
- 	 st	%o5, [%g7 + PID]
- 1:	retl
- 	 nop
--END(__vfork)
-+END(__libc_vfork)
- 
- #if IS_IN (libc)
-+weak_alias (__libc_vfork, vfork)
-+strong_alias (__libc_vfork, __vfork)
- libc_hidden_def (__vfork)
--weak_alias (__vfork, vfork)
--strong_alias (__vfork, __libc_vfork)
- #endif
-diff --git a/sysdeps/unix/sysv/linux/sparc/sparc64/vfork.S b/sysdeps/unix/sysv/linux/sparc/sparc64/vfork.S
-index a7479e9..0818eba 100644
---- a/sysdeps/unix/sysv/linux/sparc/sparc64/vfork.S
-+++ b/sysdeps/unix/sysv/linux/sparc/sparc64/vfork.S
-@@ -21,7 +21,7 @@
- 
- 	.text
- 	.globl	__syscall_error
--ENTRY(__vfork)
-+ENTRY(__libc_vfork)
- 	ld	[%g7 + PID], %o5
- 	sethi	%hi(0x80000000), %o3
- 	cmp	%o5, 0
-@@ -42,10 +42,10 @@ ENTRY(__vfork)
- 	 st	%o5, [%g7 + PID]
- 1:	retl
- 	 nop
--END(__vfork)
-+END(__libc_vfork)
- 
- #if IS_IN (libc)
-+weak_alias (__libc_vfork, vfork)
-+strong_alias (__libc_vfork, __vfork)
- libc_hidden_def (__vfork)
--weak_alias (__vfork, vfork)
--strong_alias (__vfork, __libc_vfork)
- #endif
--- 
-2.7.3
-

package/glibc/2.23/0005-sh-Fix-building-with-gcc5-6.patch

@@ -1,56 +0,0 @@
-From dbb9ecfaac8db022292791936733e0841a0aa447 Mon Sep 17 00:00:00 2001
-From: Alexey Neyman <stilor@att.net>
-Date: Wed, 8 Feb 2017 16:00:57 -0200
-Subject: [PATCH] sh: Fix building with gcc5/6
-
-Build glibc for sh4-unknown-linux-gnu currently fails if one's
-using GCC5/6: in dl-conflict.c, the elf_machine_rela() function
-is called with NULL as its 3rd argument, sym. The implementation
-of that function in sysdeps/sh/dl-machine.h dereferences that pointer:
-
-const Elf32_Sym *const refsym = sym;
-...
-if (map == &GL(dl_rtld_map))
-  value -= map->l_addr + refsym->st_value + reloc->r_addend;
-
-GCC discovers a null pointer dereference, and in accordance with
--fdelete-null-pointer-checks (which is enabled in -O2) replaces this
-code with a trap - which, as SH does not implement a trap pattern in
-GCC, evaluates to an abort() call. This abort() call pulls many more
-objects from libc_nonshared.a, eventually resulting in link failure
-due to multiple definitions for a number of symbols.
-
-As far as I see, the conditional before this code is always false in
-rtld: _dl_resolve_conflicts() is called with main_map as the first
-argument, not GL(_dl_rtld_map), but since that call is in yet another
-compilation unit, GCC does not know about it. Patch that wraps this
-conditional into !defined RESOLVE_CONFLICT_FIND_MAP attached.
-
-	* sysdeps/sh/dl-machine.h (elf_machine_rela): The condition
-	in R_SH_DIR32 case is always false when inlined from
-	dl-conflict.c. Ifdef out to prevent GCC from insertin an
-	abort() call.
-
-[Waldemar: backport of
-https://sourceware.org/git/?p=glibc.git;a=commit;h=d40dbe722f004f999b589de776f7e57e564dda01.]
-Signed-off-by: Waldemar Brodkorb <wbx@openadk.org>
----
- sysdeps/sh/dl-machine.h | 2 +-
- 1 file changed, 1 insertion(+), 1 deletion(-)
-
-diff --git a/sysdeps/sh/dl-machine.h b/sysdeps/sh/dl-machine.h
-index 5bb37d0..6509055 100644
---- a/sysdeps/sh/dl-machine.h
-+++ b/sysdeps/sh/dl-machine.h
-@@ -389,7 +389,7 @@ elf_machine_rela (struct link_map *map, const Elf32_Rela *reloc,
- 	  break;
- 	case R_SH_DIR32:
- 	  {
--#ifndef RTLD_BOOTSTRAP
-+#if !defined RTLD_BOOTSTRAP && !defined RESOLVE_CONFLICT_FIND_MAP
- 	   /* This is defined in rtld.c, but nowhere in the static
- 	      libc.a; make the reference weak so static programs can
- 	      still link.  This declaration cannot be done when
--- 
-2.7.4
-

package/glibc/2.24/0001-sh-Fix-building-with-gcc5-6.patch

@@ -1,56 +0,0 @@
-From 98cadd4b9fa8e32d1d0dea8e46b5ba829af4e8a2 Mon Sep 17 00:00:00 2001
-From: Alexey Neyman <stilor@att.net>
-Date: Wed, 8 Feb 2017 16:00:57 -0200
-Subject: [PATCH] sh: Fix building with gcc5/6
-
-Build glibc for sh4-unknown-linux-gnu currently fails if one's
-using GCC5/6: in dl-conflict.c, the elf_machine_rela() function
-is called with NULL as its 3rd argument, sym. The implementation
-of that function in sysdeps/sh/dl-machine.h dereferences that pointer:
-
-const Elf32_Sym *const refsym = sym;
-...
-if (map == &GL(dl_rtld_map))
-  value -= map->l_addr + refsym->st_value + reloc->r_addend;
-
-GCC discovers a null pointer dereference, and in accordance with
--fdelete-null-pointer-checks (which is enabled in -O2) replaces this
-code with a trap - which, as SH does not implement a trap pattern in
-GCC, evaluates to an abort() call. This abort() call pulls many more
-objects from libc_nonshared.a, eventually resulting in link failure
-due to multiple definitions for a number of symbols.
-
-As far as I see, the conditional before this code is always false in
-rtld: _dl_resolve_conflicts() is called with main_map as the first
-argument, not GL(_dl_rtld_map), but since that call is in yet another
-compilation unit, GCC does not know about it. Patch that wraps this
-conditional into !defined RESOLVE_CONFLICT_FIND_MAP attached.
-
-	* sysdeps/sh/dl-machine.h (elf_machine_rela): The condition
-	in R_SH_DIR32 case is always false when inlined from
-	dl-conflict.c. Ifdef out to prevent GCC from insertin an
-	abort() call.
-
-[Waldemar: backport of
-https://sourceware.org/git/?p=glibc.git;a=commit;h=d40dbe722f004f999b589de776f7e57e564dda01.]
-Signed-off-by: Waldemar Brodkorb <wbx@openadk.org>
----
- sysdeps/sh/dl-machine.h | 2 +-
- 1 file changed, 1 insertion(+), 1 deletion(-)
-
-diff --git a/sysdeps/sh/dl-machine.h b/sysdeps/sh/dl-machine.h
-index 5bb37d0..6509055 100644
---- a/sysdeps/sh/dl-machine.h
-+++ b/sysdeps/sh/dl-machine.h
-@@ -389,7 +389,7 @@ elf_machine_rela (struct link_map *map, const Elf32_Rela *reloc,
- 	  break;
- 	case R_SH_DIR32:
- 	  {
--#ifndef RTLD_BOOTSTRAP
-+#if !defined RTLD_BOOTSTRAP && !defined RESOLVE_CONFLICT_FIND_MAP
- 	   /* This is defined in rtld.c, but nowhere in the static
- 	      libc.a; make the reference weak so static programs can
- 	      still link.  This declaration cannot be done when
--- 
-2.7.4
-

package/glibc/Config.in

@@ -6,32 +6,4 @@ config BR2_PACKAGE_GLIBC
 	select BR2_PACKAGE_LINUX_HEADERS
 	select BR2_TOOLCHAIN_HAS_SSP
 
-choice
-	prompt "glibc version"
-	default BR2_GLIBC_VERSION_2_24
-
-config BR2_GLIBC_VERSION_2_23
-	bool "2.23"
-
-config BR2_GLIBC_VERSION_2_24
-	bool "2.24"
-	# Linux 3.2 or later kernel headers are required on all arches.
-	# See: https://sourceware.org/ml/libc-alpha/2016-08/msg00212.html
-	depends on BR2_TOOLCHAIN_HEADERS_AT_LEAST_3_2
-
-config BR2_GLIBC_VERSION_2_25
-	bool "2.25"
-	depends on BR2_TOOLCHAIN_HEADERS_AT_LEAST_3_2
-
-comment "glibc-2.24+ needs kernel headers >= 3.2"
-	depends on !BR2_TOOLCHAIN_HEADERS_AT_LEAST_3_2
-
-endchoice
-
 endif
-
-config BR2_GLIBC_VERSION_STRING
-	string
-	default "2.23" if BR2_GLIBC_VERSION_2_23
-	default "2.24" if BR2_GLIBC_VERSION_2_24
-	default "2.25" if BR2_GLIBC_VERSION_2_25

package/glibc/glibc.hash

@@ -1,4 +1,2 @@
 # Locally calculated after checking pgp signature (glibc)
-sha256	94efeb00e4603c8546209cefb3e1a50a5315c86fa9b078b6fad758e187ce13e9	glibc-2.23.tar.xz
-sha256	99d4a3e8efd144d71488e478f62587578c0f4e1fa0b4eed47ee3d4975ebeb5d3	glibc-2.24.tar.xz
 sha256	067bd9bb3390e79aa45911537d13c3721f1d9d3769931a30c2681bfee66f23a0	glibc-2.25.tar.xz

package/glibc/glibc.mk

@@ -4,7 +4,7 @@
 #
 ################################################################################
 
-GLIBC_VERSION = $(call qstrip,$(BR2_GLIBC_VERSION_STRING))
+GLIBC_VERSION = 2.25
 GLIBC_SITE = $(BR2_GNU_MIRROR)/libc
 GLIBC_SOURCE = glibc-$(GLIBC_VERSION).tar.xz
 GLIBC_SRC_SUBDIR = .

toolchain/toolchain-buildroot/Config.in

@@ -50,6 +50,7 @@ config BR2_TOOLCHAIN_BUILDROOT_GLIBC
 		   BR2_microblaze || BR2_nios2
 	depends on BR2_USE_MMU
 	depends on !BR2_STATIC_LIBS
+	depends on BR2_TOOLCHAIN_HEADERS_AT_LEAST_3_2
 	depends on !BR2_powerpc_SPE
 	select BR2_TOOLCHAIN_USES_GLIBC
 	# our glibc.mk enables RPC support
@@ -60,9 +61,9 @@ config BR2_TOOLCHAIN_BUILDROOT_GLIBC
 
 	  http://www.gnu.org/software/libc/
 
-comment "glibc only available with shared lib support"
+comment "glibc needs a toolchain w/ dynamic library, kernel headers >= 3.2"
 	depends on BR2_USE_MMU
-	depends on BR2_STATIC_LIBS
+	depends on BR2_STATIC_LIBS || !BR2_TOOLCHAIN_HEADERS_AT_LEAST_3_2
 
 config BR2_TOOLCHAIN_BUILDROOT_MUSL
 	bool "musl"