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patches/glibc/2.9/430-2.7-cross-compile-nptl.patch
author "Yann E. MORIN" <yann.morin.1998@anciens.enib.fr>
Sun Jul 17 22:43:07 2011 +0200 (2011-07-17)
changeset 2893 a8a65758664f
parent 1201 c9967a6e3b25
permissions -rw-r--r--
cc/gcc: do not use the core pass-2 to build the baremetal compiler

In case we build a baremetal compiler, use the standard passes:
- core_cc is used to build the C library;
- as such, it is meant to run on build, not host;
- the final compiler is meant to run on host;

As the current final compiler step can not build a baremetal compiler,
call the core backend from the final step.

NB: Currently, newlib is built during the start_files pass, so we have
to have a core compiler by then... Once we can build the baremetal
compiler from the final cc step, then we can move the newlib build to
the proper step, and then get rid of the core pass-1 static compiler...

Signed-off-by: "Yann E. MORIN" <yann.morin.1998@anciens.enib.fr> 
     1 Original patch from: gentoo/src/patchsets/glibc/2.9/5070_all_glibc-2.7-cross-compile-nptl.patch

     2 

     3 -= BEGIN original header =-

     4 A little hack for cross-compiling NPTL

     5 

     6 http://sourceware.org/ml/libc-alpha/2005-02/msg00043.html

     7 

     8 -= END original header =-

     9 

    10 diff -durN glibc-2_9.orig/nptl/sysdeps/pthread/configure glibc-2_9/nptl/sysdeps/pthread/configure

    11 --- glibc-2_9.orig/nptl/sysdeps/pthread/configure	2007-10-17 00:24:30.000000000 +0200

    12 +++ glibc-2_9/nptl/sysdeps/pthread/configure	2009-02-02 22:01:28.000000000 +0100

    13 @@ -78,6 +78,10 @@

    14  fi

    15  { echo "$as_me:$LINENO: result: $libc_cv_forced_unwind" >&5

    16  echo "${ECHO_T}$libc_cv_forced_unwind" >&6; }

    17 +if test $libc_cv_forced_unwind = no -a $build_cpu != $host_cpu; then

    18 +  echo "$as_me:$LINENO: forcing libc_cv_forced_unwind = yes for cross-compile"

    19 +  libc_cv_forced_unwind=yes

    20 +fi

    21  if test $libc_cv_forced_unwind = yes; then

    22    cat >>confdefs.h <<\_ACEOF

    23  #define HAVE_FORCED_UNWIND 1

    24 @@ -141,6 +145,10 @@

    25  { echo "$as_me:$LINENO: result: $libc_cv_c_cleanup" >&5

    26  echo "${ECHO_T}$libc_cv_c_cleanup" >&6; }

    27    CFLAGS="$old_CFLAGS"

    28 +  if test $libc_cv_c_cleanup = no -a $build_cpu != $host_cpu; then

    29 +    echo "$as_me:$LINENO: result: forcing libc_cv_c_cleanup = yes for cross-compile"

    30 +    libc_cv_c_cleanup=yes

    31 +  fi

    32    if test $libc_cv_c_cleanup = no; then

    33      { { echo "$as_me:$LINENO: error: the compiler must support C cleanup handling" >&5

    34  echo "$as_me: error: the compiler must support C cleanup handling" >&2;}

    35 diff -durN glibc-2_9.orig/nptl/sysdeps/pthread/configure.in glibc-2_9/nptl/sysdeps/pthread/configure.in

    36 --- glibc-2_9.orig/nptl/sysdeps/pthread/configure.in	2003-12-03 07:50:01.000000000 +0100

    37 +++ glibc-2_9/nptl/sysdeps/pthread/configure.in	2009-02-02 22:01:28.000000000 +0100

    38 @@ -28,6 +28,9 @@

    39  struct _Unwind_Context *context;

    40  _Unwind_GetCFA (context)],

    41  libc_cv_forced_unwind=yes, libc_cv_forced_unwind=no)])

    42 +if test $libc_cv_forced_unwind = no -a $build_cpu != $host_cpu; then

    43 +  libc_cv_forced_unwind=yes

    44 +fi

    45  if test $libc_cv_forced_unwind = yes; then

    46    AC_DEFINE(HAVE_FORCED_UNWIND)

    47  dnl Check for C cleanup handling.

    48 @@ -41,6 +44,9 @@

    49    puts ("test")],

    50  libc_cv_c_cleanup=yes, libc_cv_c_cleanup=no)])

    51    CFLAGS="$old_CFLAGS"

    52 +  if test $libc_cv_c_cleanup = no -a $build_cpu != $host_cpu; then

    53 +    libc_cv_c_cleanup=yes

    54 +  fi

    55    if test $libc_cv_c_cleanup = no; then

    56      AC_MSG_ERROR([the compiler must support C cleanup handling])

    57    fi
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