glibc: add 2.24

since eglibc is deprecated just use glibc as name

- fix build errors w. stack-protector (observed for x86_64):
libresolv_pic.a(gethnamaddr.os): In function `addrsort':
gethnamaddr.c:(.text+0x425): undefined reference to `__stack_chk_guard'

by additionally setting libc_cv_ssp_strong=no
like previously libc_cv_ssp=no was set

- fix compile errors on 2.24 x86 introduced by
upstream changesets "Optimize i386 syscall inlining"

errors are like:
- https://sourceware.org/ml/libc-alpha/2015-10/msg00745.html
and trying to fix with the whats suggested at:
https://patchwork.openembedded.org/patch/118909/
leads to other error:
gcc6: elf/librtld.os: In function `__mmap':
(.text+0x131a9): undefined reference to `__libc_do_syscall'
or:
gcc5: elf/dl-load.os
{standard input}: Assembler messages:
{standard input}:5129: Error: symbol `__x86.get_pc_thunk.cx' is already defined

instead of testing other flags/effects (-fno-omit-frame-pointer)
just use -O2 (like buildroot does) instead of -Os

boot+pings tested on:
qemu malta (le+be) (gcc5+bin2.25.1)
qemu aarch64 (gcc5+bin2.25.1)
qemu x86_64 (gcc6+bin2.26)
qemu x86 generic (gcc6+bin2.26)

Signed-off-by: Dirk Neukirchen <dirkneukirchen@web.de>

toolchain/Config.in

@@ -225,7 +225,7 @@ choice
 	  Select the C library implementation.
 
 	config LIBC_USE_GLIBC
-		bool "Use (e)glibc"
+		bool "Use glibc"
 		select USE_GLIBC
 		depends on !arc
 

toolchain/glibc/Config.in

@@ -1,5 +1,5 @@
 choice
-	prompt "(e)glibc version"
+	prompt "glibc version"
 	depends on TOOLCHAINOPTS && USE_GLIBC
 	default GLIBC_USE_VERSION_2_22
 	help
@@ -9,4 +9,8 @@ choice
 		bool "glibc 2.22"
 		select GLIBC_VERSION_2_22
 
+	config GLIBC_USE_VERSION_2_24
+		bool "glibc 2.24"
+		select GLIBC_VERSION_2_24
+
 endchoice

toolchain/glibc/Config.version

@@ -3,9 +3,13 @@ if USE_GLIBC
 config GLIBC_VERSION
 	string
 	default "2.22" if GLIBC_VERSION_2_22
+	default "2.24" if GLIBC_VERSION_2_24
 
 config GLIBC_VERSION_2_22
 	default y if !TOOLCHAINOPTS
 	bool
 
+config GLIBC_VERSION_2_24
+	bool
+
 endif

toolchain/glibc/common.mk

@@ -16,6 +16,9 @@ REVISION_2.21 = 16d0a0c
 MD5SUM_2.22 = b575850e77b37d70f96472285290b391
 REVISION_2.22 = b995d95
 
+MD5SUM_2.24 = 5c5a6f1ac6fce866e37643c41ac116f3
+REVISION_2.24 = 8c716c2
+
 
 PKG_NAME:=glibc
 PKG_VERSION:=$(call qstrip,$(CONFIG_GLIBC_VERSION))
@@ -55,10 +58,14 @@ ifeq ($(ARCH),mips64)
   endif
 endif
 
+
+# -Os miscompiles w. 2.24 gcc5/gcc6
+# only -O2 tested by upstream changeset
+# "Optimize i386 syscall inlining for GCC 5"
 GLIBC_CONFIGURE:= \
 	BUILD_CC="$(HOSTCC)" \
 	$(TARGET_CONFIGURE_OPTS) \
-	CFLAGS="$(TARGET_CFLAGS)" \
+	CFLAGS="-O2 $(filter-out -Os,$(call qstrip,$(TARGET_CFLAGS)))" \
 	libc_cv_slibdir="/lib" \
 	use_ldconfig=no \
 	$(HOST_BUILD_DIR)/$(GLIBC_PATH)configure \
@@ -74,6 +81,7 @@ GLIBC_CONFIGURE:= \
 		--$(if $(CONFIG_SOFT_FLOAT),without,with)-fp
 
 export libc_cv_ssp=no
+export libc_cv_ssp_strong=no
 export ac_cv_header_cpuid_h=yes
 export HOST_CFLAGS := $(HOST_CFLAGS) -idirafter $(CURDIR)/$(PATH_PREFIX)/include
 

toolchain/glibc/patches/2.24/100-fix_cross_rpcgen.patch

@@ -0,0 +1,52 @@
+--- a/sunrpc/rpc/types.h
++++ b/sunrpc/rpc/types.h
+@@ -75,18 +75,23 @@ typedef unsigned long rpcport_t;
+ #endif
+ 
+ #ifndef __u_char_defined
+-typedef __u_char u_char;
+-typedef __u_short u_short;
+-typedef __u_int u_int;
+-typedef __u_long u_long;
+-typedef __quad_t quad_t;
+-typedef __u_quad_t u_quad_t;
+-typedef __fsid_t fsid_t;
++typedef unsigned char u_char;
++typedef unsigned short u_short;
++typedef unsigned int u_int;
++typedef unsigned long u_long;
++#if __WORDSIZE == 64
++typedef long int quad_t;
++typedef unsigned long int u_quad_t;
++#elif defined __GLIBC_HAVE_LONG_LONG
++typedef long long int quad_t;
++typedef unsigned long long int u_quad_t;
++#endif
++typedef u_quad_t fsid_t;
+ # define __u_char_defined
+ #endif
+-#ifndef __daddr_t_defined
+-typedef __daddr_t daddr_t;
+-typedef __caddr_t caddr_t;
++#if !defined(__daddr_t_defined) && defined(linux)
++typedef long int daddr_t;
++typedef char *caddr_t;
+ # define __daddr_t_defined
+ #endif
+ 
+--- a/sunrpc/rpc_main.c
++++ b/sunrpc/rpc_main.c
+@@ -958,9 +958,10 @@ mkfile_output (struct commandline *cmd)
+ 	abort ();
+       temp = rindex (cmd->infile, '.');
+       cp = stpcpy (mkfilename, "Makefile.");
+-      if (temp != NULL)
+-	*((char *) stpncpy (cp, cmd->infile, temp - cmd->infile)) = '\0';
+-      else
++      if (temp != NULL) {
++        strncpy(cp, cmd->infile, temp - cmd->infile);
++        cp[temp - cmd->infile - 1] = 0;
++      } else
+ 	stpcpy (cp, cmd->infile);
+ 
+     }

toolchain/glibc/patches/2.24/200-add-dl-search-paths.patch

@@ -0,0 +1,14 @@
+add /usr/lib to default search path for the dynamic linker
+
+--- a/Makeconfig
++++ b/Makeconfig
+@@ -526,6 +526,9 @@ else
+ default-rpath = $(libdir)
+ endif
+ 
++# Add /usr/lib to default search path for the dynamic linker
++user-defined-trusted-dirs := /usr/lib
++
+ ifndef link-extra-libs
+ link-extra-libs = $(LDLIBS-$(@F))
+ link-extra-libs-static = $(link-extra-libs)