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patches/glibc/ports-2.10.1/390-cross-compile-nptl.patch
author Johannes Stezenbach <js@sig21.net>
Thu Jul 29 19:47:16 2010 +0200 (2010-07-29)
changeset 2045 fdaa6c7f6dea
permissions -rw-r--r--
cc/gcc: add option to compile against static libstdc++, for gcc-4.4 and newer

Idea and know-how taken from CodeSourcery build script.

Normal build:
$ ldd arm-unknown-linux-uclibcgnueabi-gcc
linux-gate.so.1 => (0xb77f3000)
libstdc++.so.6 => /usr/lib/libstdc++.so.6 (0xb76e8000)
libc.so.6 => /lib/i686/cmov/libc.so.6 (0xb75a1000)
libm.so.6 => /lib/i686/cmov/libm.so.6 (0xb757a000)
/lib/ld-linux.so.2 (0xb77f4000)
libgcc_s.so.1 => /lib/libgcc_s.so.1 (0xb755c000)

CC_STATIC_LIBSTDCXX=y:
$ ldd arm-unknown-linux-uclibcgnueabi-gcc
linux-gate.so.1 => (0xb7843000)
libc.so.6 => /lib/i686/cmov/libc.so.6 (0xb76e6000)
/lib/ld-linux.so.2 (0xb7844000)

I made CC_STATIC_LIBSTDCXX default=y since I think
it is always desirable.

Signed-off-by: Johannes Stezenbach <js@sig21.net> 
     1 A little hack for cross-compiling NPTL

     2 

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

     4 

     5 diff -durN glibc-2.10.1.orig/nptl/sysdeps/pthread/configure glibc-2.10.1/nptl/sysdeps/pthread/configure

     6 --- glibc-2.10.1.orig/nptl/sysdeps/pthread/configure	2009-05-17 14:19:31.000000000 +0200

     7 +++ glibc-2.10.1/nptl/sysdeps/pthread/configure	2009-11-13 00:50:43.000000000 +0100

     8 @@ -78,6 +78,10 @@

     9  fi

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

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

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

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

    14 +  libc_cv_forced_unwind=yes

    15 +fi

    16  if test $libc_cv_forced_unwind = yes; then

    17    cat >>confdefs.h <<\_ACEOF

    18  #define HAVE_FORCED_UNWIND 1

    19 @@ -141,6 +145,10 @@

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

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

    22    CFLAGS="$old_CFLAGS"

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

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

    25 +    libc_cv_c_cleanup=yes

    26 +  fi

    27    if test $libc_cv_c_cleanup = no; then

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

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

    30 diff -durN glibc-2.10.1.orig/nptl/sysdeps/pthread/configure.in glibc-2.10.1/nptl/sysdeps/pthread/configure.in

    31 --- glibc-2.10.1.orig/nptl/sysdeps/pthread/configure.in	2003-12-03 07:50:01.000000000 +0100

    32 +++ glibc-2.10.1/nptl/sysdeps/pthread/configure.in	2009-11-13 00:50:43.000000000 +0100

    33 @@ -28,6 +28,9 @@

    34  struct _Unwind_Context *context;

    35  _Unwind_GetCFA (context)],

    36  libc_cv_forced_unwind=yes, libc_cv_forced_unwind=no)])

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

    38 +  libc_cv_forced_unwind=yes

    39 +fi

    40  if test $libc_cv_forced_unwind = yes; then

    41    AC_DEFINE(HAVE_FORCED_UNWIND)

    42  dnl Check for C cleanup handling.

    43 @@ -41,6 +44,9 @@

    44    puts ("test")],

    45  libc_cv_c_cleanup=yes, libc_cv_c_cleanup=no)])

    46    CFLAGS="$old_CFLAGS"

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

    48 +    libc_cv_c_cleanup=yes

    49 +  fi

    50    if test $libc_cv_c_cleanup = no; then

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

    52    fi
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