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patches/gcc/4.2.0/250-softfloat-fix.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 262 30b65aecf7fb
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 This patch (C) 2007 Yann E. MORIN

     2 Licensed under GPL v2.

     3 

     4 First hunk of this patch solves compiling uClibc:

     5 

     6 make[1]: Entering directory `/home/ymorin/x-tools/build/armeb-unknown-linux-uclibc/gcc-4.1.1-uClibc-0.9.28.1/build-libc'

     7   LD libuClibc-0.9.29.so

     8 libc/libc_so.a(difftime.os): In function `difftime':

     9 difftime.c:(.text+0x8): undefined reference to `__floatsidf'

    10 difftime.c:(.text+0x2c): undefined reference to `__subdf3'

    11 libc/libc_so.a(_fpmaxtostr.os): In function `_fpmaxtostr':

    12 _fpmaxtostr.c:(.text+0xd4): undefined reference to `__nedf2'

    13 _fpmaxtostr.c:(.text+0xf8): undefined reference to `__eqdf2'

    14 _fpmaxtostr.c:(.text+0x114): undefined reference to `__divdf3'

    15 _fpmaxtostr.c:(.text+0x120): undefined reference to `__ltdf2'

    16 _fpmaxtostr.c:(.text+0x1c4): undefined reference to `__muldf3'

    17 _fpmaxtostr.c:(.text+0x388): undefined reference to `__gedf2'

    18 _fpmaxtostr.c:(.text+0x430): undefined reference to `__adddf3'

    19 libc/libc_so.a(__psfs_do_numeric.os): In function `__psfs_do_numeric':

    20 __psfs_do_numeric.c:(.text+0x520): undefined reference to `__truncdfsf2'

    21 libc/libc_so.a(strtof.os): In function `strtof':

    22 strtof.c:(.text+0x1c): undefined reference to `__extendsfdf2'

    23 /home/ymorin/x-tools/build/armeb-unknown-linux-uclibc/gcc-4.1.1-uClibc-0.9.28.1/cc_core_prefix/lib/gcc/arm-linux-uclibc/4.1.1/libgcc.a(_fixunsdfsi.o):

    24 In function `__fixunsdfsi':

    25 libgcc2.c:(.text+0x34): undefined reference to `__fixdfsi'

    26 make[2]: *** [lib/libc.so] Error 1

    27 make[1]: *** [lib/libc.so.0] Error 2

    28 make[1]: Leaving directory `/home/ymorin/x-tools/build/armeb-unknown-linux-uclibc/gcc-4.1.1-uClibc-0.9.28.1/build-libc'

    29 make: *** [/home/ymorin/x-tools/build/armeb-unknown-linux-uclibc/gcc-4.1.1-uClibc-0.9.28.1/build-libc/lib/libc.a]

    30 Error 2

    31 

    32 The second hunk fixes building final gcc because soft-float implies using -lfloat (which we don't have).

    33 

    34 

    35 diff -dur gcc-4.2.0.orig/gcc/config.gcc gcc-4.2.0/gcc/config.gcc

    36 --- gcc-4.2.0.orig/gcc/config.gcc	2007-07-15 11:24:18.000000000 +0200

    37 +++ gcc-4.2.0/gcc/config.gcc	2007-07-15 11:26:02.000000000 +0200

    38 @@ -721,7 +721,7 @@

    39  	    default_use_cxa_atexit=yes

    40  	    ;;

    41  	*)

    42 -	    tmake_file="$tmake_file arm/t-linux"

    43 +	    tmake_file="$tmake_file arm/t-linux arm/t-arm-elf"

    44  	    ;;

    45  	esac

    46  	tm_file="$tm_file arm/aout.h arm/arm.h"

    47 diff -dur gcc-4.2.0.orig/gcc/config/arm/linux-elf.h gcc-4.2.0/gcc/config/arm/linux-elf.h

    48 --- gcc-4.2.0.orig/gcc/config/arm/linux-elf.h	2007-07-15 11:24:18.000000000 +0200

    49 +++ gcc-4.2.0/gcc/config/arm/linux-elf.h	2007-07-15 11:26:02.000000000 +0200

    50 @@ -63,7 +63,7 @@

    51     %{shared:-lc} \

    52     %{!shared:%{profile:-lc_p}%{!profile:-lc}}"

    53  

    54 -#define LIBGCC_SPEC "%{msoft-float:-lfloat} %{mfloat-abi=soft*:-lfloat} -lgcc"

    55 +#define LIBGCC_SPEC "-lgcc"

    56  

    57  #define GLIBC_DYNAMIC_LINKER "/lib/ld-linux.so.2"

    58
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