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crosstool-0.38 gcc-3.3.1-glibc-2.3.2 and softfloat
- From: "Pelle Svensson" <pelle2004 at hotmail dot com>
- To: crossgcc at sourceware dot org
- Date: Mon, 23 Jul 2007 17:39:13 +0200
- Subject: crosstool-0.38 gcc-3.3.1-glibc-2.3.2 and softfloat
- Bcc:
Hi,
I have some extarnal libs compiled with softfloat and gcc-3.3.1-glibc-2.3.2.
I can't
recompile the libs so I must use that setup in my other apps.
Now I can't get softfloat to work. Building crosstool works fine, (I think),
but
compiling the app results in undefined floating point functions. The are all
listed
here
'http://gcc.gnu.org/onlinedocs/gccint/Soft-float-library-routines.html'.
If I add -msoft-float when buildingh my app it complais about "cannot find
-lfloat"
Am I doing the right thing?
Do I need -msoft-float?
I have seen crosstool's issues about soft-float which all end up in a patch
somthing like this which I have added during the build of crosstools.
# Origin: from a patch by Dimitry Andric <dimitry@andric.com>, 2004-05-01
# See http://gcc.gnu.org/PR14352 and http://gcc.gnu.org/PR16314
# See also http://gcc.gnu.org/ml/gcc-patches/2004-08/msg02568.html et seq
for why this isn't in mainline
# Fixes errors like the following when building glibc (or any other
executable
# or shared library) when using gcc 3.4.0 for ARM with softfloat:
#
# .../libc_pic.os(.text+0x15834): In function `__modf': undefined reference
to `__subdf3'
# .../libc_pic.os(.text+0x158b8): In function `__modf': undefined reference
to `__subdf3'
# .../libc_pic.os(.text+0x1590c): In function `scalbn': undefined reference
to `__muldf3'
# .../libc_pic.os(.text+0x15e94): In function `__ldexpf': undefined
reference to `__eqsf2'
# .../libc_pic.os(.text+0xcee4c): In function `monstartup': undefined
reference to `__fixsfsi'
diff -urNd gcc-3.3.1-orig/gcc/config/arm/t-linux
gcc-3.3.1/gcc/config/arm/t-linux
--- gcc-3.3.1-orig/gcc/config/arm/t-linux 2003-09-20 23:09:07.000000000
+0200
+++ gcc-3.3.1/gcc/config/arm/t-linux 2004-05-01 20:31:59.102846400 +0200
@@ -4,7 +4,10 @@
LIBGCC2_DEBUG_CFLAGS = -g0
LIB1ASMSRC = arm/lib1funcs.asm
-LIB1ASMFUNCS = _udivsi3 _divsi3 _umodsi3 _modsi3 _dvmd_lnx
+LIB1ASMFUNCS = _udivsi3 _divsi3 _umodsi3 _modsi3 _dvmd_lnx \
+ _negdf2 _addsubdf3 _muldivdf3 _cmpdf2 _unorddf2 _fixdfsi _fixunsdfsi \
+ _truncdfsf2 _negsf2 _addsubsf3 _muldivsf3 _cmpsf2 _unordsf2 \
+ _fixsfsi _fixunssfsi
# MULTILIB_OPTIONS = mhard-float/msoft-float
# MULTILIB_DIRNAMES = hard-float soft-float
/Pelle
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