libg/eglibc: add updated eglibc 2.15

Includes a patch to remove __builtin_expect test:

In eglibc-2.15, the build breaks in configure while testing
for the existance of __builtin_expect. It fails with newer
versions of gcc.

This patch is a modification of an upstream change in glibc
mainline (to be 2.16) to fix the following error:

[CFG  ]    checking for __builtin_expect... no
[ERROR]    configure: error: support for __builtin_expect needed

http://sourceware.org/git/?p=glibc.git;a=commit;h=3857022a761ea7251f8e5c0e45d382ebc3e34cf9

Signed-off-by: Bryan Hundven <bryanhundven@gmail.com>
[yann.morin.1998@free.fr: coalesce both patches into a single changeset]
Signed-off-by: "Yann E. MORIN" <yann.morin.1998@free.fr>

2 files changed, 89 insertions, 0 deletions

diff --git a/config/libc/eglibc.in b/config/libc/eglibc.in
index 6e96d14..5ca4579 100644
--- a/config/libc/eglibc.in
+++ b/config/libc/eglibc.in
@@ -18,6 +18,12 @@ choice
 # Don't remove next line
 # CT_INSERT_VERSION_BELOW
 
+config LIBC_EGLIBC_V_2_15
+    bool
+    prompt "2_15"
+    depends on EXPERIMENTAL
+    select LIBC_EGLIBC_2_15_or_later
+
 config LIBC_EGLIBC_V_2_14
     bool
     prompt "2_14"
@@ -83,6 +89,7 @@ config LIBC_VERSION
     string
 # Don't remove next line
 # CT_INSERT_VERSION_STRING_BELOW
+    default "2_15" if LIBC_EGLIBC_V_2_15
     default "2_14" if LIBC_EGLIBC_V_2_14
     default "2_13" if LIBC_EGLIBC_V_2_13
     default "2_12" if LIBC_EGLIBC_V_2_12
@@ -95,6 +102,10 @@ config LIBC_VERSION
     default "2_5" if LIBC_EGLIBC_V_2_5
     default "trunk" if LIBC_EGLIBC_V_TRUNK
 
+config LIBC_EGLIBC_2_15_or_later
+    bool
+    select LIBC_EGLIBC_2_14_or_later
+
 config LIBC_EGLIBC_2_14_or_later
     bool
     select LIBC_EGLIBC_2_13_or_later
diff --git a/patches/eglibc/2_15/100-Remove-test-for-__builtin_expect.patch b/patches/eglibc/2_15/100-Remove-test-for-__builtin_expect.patch
new file mode 100644
index 0000000..ed2d1ce
--- /dev/null
+++ b/patches/eglibc/2_15/100-Remove-test-for-__builtin_expect.patch
@@ -0,0 +1,78 @@
+diff --git a/configure b/configure
+index e5e0184..85da2bc 100755
+--- a/configure
++++ b/configure
+@@ -7567,40 +7567,6 @@ _ACEOF
+ fi
+ fi
+ 
+-{ $as_echo "$as_me:$LINENO: checking for __builtin_expect" >&5
+-$as_echo_n "checking for __builtin_expect... " >&6; }
+-if test "${libc_cv_gcc_builtin_expect+set}" = set; then
+-  $as_echo_n "(cached) " >&6
+-else
+-  cat > conftest.c <<EOF
+-#line $LINENO "configure"
+-int foo (int a)
+-{
+-  a = __builtin_expect (a, 10);
+-  return a == 10 ? 0 : 1;
+-}
+-EOF
+-if { ac_try='${CC-cc} $CFLAGS $CPPFLAGS $LDFLAGS -nostdlib -nostartfiles
+-			    -o conftest conftest.c -lgcc >&5'
+-  { (eval echo "$as_me:$LINENO: \"$ac_try\"") >&5
+-  (eval $ac_try) 2>&5
+-  ac_status=$?
+-  $as_echo "$as_me:$LINENO: \$? = $ac_status" >&5
+-  (exit $ac_status); }; }; then
+-  libc_cv_gcc_builtin_expect=yes
+-else
+-  libc_cv_gcc_builtin_expect=no
+-fi
+-rm -f conftest*
+-fi
+-{ $as_echo "$as_me:$LINENO: result: $libc_cv_gcc_builtin_expect" >&5
+-$as_echo "$libc_cv_gcc_builtin_expect" >&6; }
+-if test "$libc_cv_gcc_builtin_expect" = no; then
+-  { { $as_echo "$as_me:$LINENO: error: support for __builtin_expect needed" >&5
+-$as_echo "$as_me: error: support for __builtin_expect needed" >&2;}
+-   { (exit 1); exit 1; }; }
+-fi
+-
+ { $as_echo "$as_me:$LINENO: checking for __builtin_memset" >&5
+ $as_echo_n "checking for __builtin_memset... " >&6; }
+ if test "${libc_cv_gcc_builtin_memset+set}" = set; then
+diff --git a/configure.in b/configure.in
+index 4655c8a..596443d 100644
+--- a/configure.in
++++ b/configure.in
+@@ -2134,28 +2134,6 @@ if test "$libc_cv_c_asmcr0_bug" != 'no'; then
+ fi
+ fi
+ 
+-dnl Check whether compiler understands __builtin_expect.
+-AC_CACHE_CHECK(for __builtin_expect, libc_cv_gcc_builtin_expect,
+-[cat > conftest.c <<EOF
+-#line $LINENO "configure"
+-int foo (int a)
+-{
+-  a = __builtin_expect (a, 10);
+-  return a == 10 ? 0 : 1;
+-}
+-EOF
+-dnl No \ in command here because it ends up inside ''.
+-if AC_TRY_COMMAND([${CC-cc} $CFLAGS $CPPFLAGS $LDFLAGS -nostdlib -nostartfiles
+-			    -o conftest conftest.c -lgcc >&AS_MESSAGE_LOG_FD]); then
+-  libc_cv_gcc_builtin_expect=yes
+-else
+-  libc_cv_gcc_builtin_expect=no
+-fi
+-rm -f conftest*])
+-if test "$libc_cv_gcc_builtin_expect" = no; then
+-  AC_MSG_ERROR([support for __builtin_expect needed])
+-fi
+-
+ AC_CACHE_CHECK(for __builtin_memset, libc_cv_gcc_builtin_memset, [dnl
+ cat > conftest.c <<\EOF
+ void zero (void *x)