This patch (C) 2007 Yann E. MORIN Licensed under GPL v2. First hunk of this patch solves compiling uClibc-0.9.28{,.1} : make[1]: Entering directory `/home/ymorin/x-tools/build/armeb-unknown-linux-uclibc/gcc-4.1.1-uClibc-0.9.28.1/build-libc' LD libuClibc-0.9.29.so libc/libc_so.a(difftime.os): In function `difftime': difftime.c:(.text+0x8): undefined reference to `__floatsidf' difftime.c:(.text+0x2c): undefined reference to `__subdf3' libc/libc_so.a(_fpmaxtostr.os): In function `_fpmaxtostr': _fpmaxtostr.c:(.text+0xd4): undefined reference to `__nedf2' _fpmaxtostr.c:(.text+0xf8): undefined reference to `__eqdf2' _fpmaxtostr.c:(.text+0x114): undefined reference to `__divdf3' _fpmaxtostr.c:(.text+0x120): undefined reference to `__ltdf2' _fpmaxtostr.c:(.text+0x1c4): undefined reference to `__muldf3' _fpmaxtostr.c:(.text+0x388): undefined reference to `__gedf2' _fpmaxtostr.c:(.text+0x430): undefined reference to `__adddf3' libc/libc_so.a(__psfs_do_numeric.os): In function `__psfs_do_numeric': __psfs_do_numeric.c:(.text+0x520): undefined reference to `__truncdfsf2' libc/libc_so.a(strtof.os): In function `strtof': strtof.c:(.text+0x1c): undefined reference to `__extendsfdf2' /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): In function `__fixunsdfsi': libgcc2.c:(.text+0x34): undefined reference to `__fixdfsi' make[2]: *** [lib/libc.so] Error 1 make[1]: *** [lib/libc.so.0] Error 2 make[1]: Leaving directory `/home/ymorin/x-tools/build/armeb-unknown-linux-uclibc/gcc-4.1.1-uClibc-0.9.28.1/build-libc' make: *** [/home/ymorin/x-tools/build/armeb-unknown-linux-uclibc/gcc-4.1.1-uClibc-0.9.28.1/build-libc/lib/libc.a] Error 2 The second hunk fixes building final gcc because soft-float implies using -lfloat (which we don't have). diff -dur gcc-4.1.1.no-softfloat-fix/gcc/config.gcc gcc-4.1.1/gcc/config.gcc --- gcc-4.1.1.no-softfloat-fix/gcc/config.gcc 2007-02-01 21:57:17.000000000 +0100 +++ gcc-4.1.1/gcc/config.gcc 2007-02-01 22:11:06.000000000 +0100 @@ -690,7 +690,7 @@ default_use_cxa_atexit=yes ;; *) - tmake_file="$tmake_file arm/t-linux" + tmake_file="$tmake_file arm/t-linux arm/t-arm-elf" ;; esac tm_file="$tm_file arm/aout.h arm/arm.h" diff -dur gcc-4.1.1.-lfloat/gcc/config/arm/linux-elf.h gcc-4.1.1/gcc/config/arm/linux-elf.h --- gcc-4.1.1.-lfloat/gcc/config/arm/linux-elf.h 2007-02-01 21:57:17.000000000 +0100 +++ gcc-4.1.1/gcc/config/arm/linux-elf.h 2007-02-01 23:00:42.000000000 +0100 @@ -63,7 +63,7 @@ %{shared:-lc} \ %{!shared:%{profile:-lc_p}%{!profile:-lc}}" -#define LIBGCC_SPEC "%{msoft-float:-lfloat} %{mfloat-abi=soft*:-lfloat} -lgcc" +#define LIBGCC_SPEC "-lgcc" #ifdef USE_UCLIBC #define LINUX_TARGET_INTERPRETER "/lib/ld-uClibc.so.0"