On 18.01.2019 14:04, Jonathan Wakely wrote:
On Fri, 18 Jan 2019 at 09:04, Christer Solskogen wrote:
I posted this on the binutils list as well, but the one answer I got
pointed the finger to gcc.
I've got gcc and binutils compiled with --with-sysroot, but gcc (or
libgcc in this case) cannot find crti.o, crtn.o and libc in the sysroot
even if the files are there.
binutils is configured like this:
/home/builder/binutils-2.31/configure --prefix=/opt/cross
--target=x86_64-blug-linux-gnu
--with-sysroot=/opt/cross/x86_64-blug-linux-gnu
gcc is configured like this: /home/builder/gcc-8/configure
--prefix=/opt/cross --libexecdir=/opt/cross/lib
--target=x86_64-blug-linux-gnu --enable-languages=c,c++
--with-sysroot=/opt/cross/x86_64-blug-linux-gnu --disable-multilib
In /opt/cross/x86_64-blug-linux-gnu/usr/lib I've got the files that it
needs: crt1.o crti.o crtn.o libc.so
Shouldn't that be $sysroot/usr/lib64 for x86_64-*-linux-gnu?
I've thought of that, so I tried symlinking $sysroot/usr/lib64 to
$sysroot/usr/lib. Still same error. It also happens on non-multilib
targets like arm-linux-gnueabihf.
Run this command manually and add -v or -Wl,-v to see where GCC tells
the linker to find them.
/tmp/gcc-obj.x86_64-blug-linux-gnu/./gcc/xgcc -Wl,-v
-B/tmp/gcc-obj.x86_64-blug-linux-gnu/./gcc/
-B/opt/cross/x86_64-blug-linux-gnu/bin/
-B/opt/cross/x86_64-blug-linux-gnu/lib/ -isystem
/opt/cross/x86_64-blug-linux-gnu/include -isystem
/opt/cross/x86_64-blug-linux-gnu/sys-include -O2 -g -O2 -DIN_GCC
-DCROSS_DIRECTORY_STRUCTURE -W -Wall -Wwrite-strings -Wcast-qual
-Wstrict-prototypes -Wmissing-prototypes -Wold-style-definition
-isystem ./include -fpic -mlong-double-80 -DUSE_ELF_SYMVER -g
-DIN_LIBGCC2 -fbuilding-libgcc -fno-stack-protector -shared
-nodefaultlibs -Wl,--soname=libgcc_s.so.1
-Wl,--version-script=libgcc.map -o ./libgcc_s.so.1.tmp -g -O2 -B./
_muldi3_s.o _negdi2_s.o _lshrdi3_s.o _ashldi3_s.o _ashrdi3_s.o
_cmpdi2_s.o _ucmpdi2_s.o _clear_cache_s.o _trampoline_s.o __main_s.o
_absvsi2_s.o _absvdi2_s.o _addvsi3_s.o _addvdi3_s.o _subvsi3_s.o
_subvdi3_s.o _mulvsi3_s.o _mulvdi3_s.o _negvsi2_s.o _negvdi2_s.o
_ctors_s.o _ffssi2_s.o _ffsdi2_s.o _clz_s.o _clzsi2_s.o _clzdi2_s.o
_ctzsi2_s.o _ctzdi2_s.o _popcount_tab_s.o _popcountsi2_s.o
_popcountdi2_s.o _paritysi2_s.o _paritydi2_s.o _powisf2_s.o _powidf2_s.o
_powixf2_s.o _mulhc3_s.o _mulsc3_s.o _muldc3_s.o _mulxc3_s.o _divhc3_s.o
_divsc3_s.o _divdc3_s.o _divxc3_s.o _bswapsi2_s.o _bswapdi2_s.o
_clrsbsi2_s.o _clrsbdi2_s.o _fixunssfsi_s.o _fixunsdfsi_s.o
_fixunsxfsi_s.o _fixsfdi_s.o _fixdfdi_s.o _fixxfdi_s.o _fixunssfdi_s.o
_fixunsdfdi_s.o _fixunsxfdi_s.o _floatdisf_s.o _floatdidf_s.o
_floatdixf_s.o _floatundisf_s.o _floatundidf_s.o _floatundixf_s.o
_divdi3_s.o _moddi3_s.o _divmoddi4_s.o _udivdi3_s.o _umoddi3_s.o
_udivmoddi4_s.o _udiv_w_sdiv_s.o cpuinfo_s.o sfp-exceptions_s.o
addtf3_s.o divtf3_s.o multf3_s.o negtf2_s.o subtf3_s.o unordtf2_s.o
fixtfsi_s.o fixunstfsi_s.o floatsitf_s.o floatunsitf_s.o fixtfdi_s.o
fixunstfdi_s.o floatditf_s.o floatunditf_s.o fixtfti_s.o fixunstfti_s.o
floattitf_s.o floatuntitf_s.o extendsftf2_s.o extenddftf2_s.o
extendxftf2_s.o trunctfsf2_s.o trunctfdf2_s.o trunctfxf2_s.o getf2_s.o
letf2_s.o eqtf2_s.o _divtc3_s.o _multc3_s.o _powitf2_s.o
enable-execute-stack_s.o unwind-dw2_s.o unwind-dw2-fde-dip_s.o
unwind-sjlj_s.o unwind-c_s.o emutls_s.o libgcc.a -lc && rm -f
./libgcc_s.so && if [ -f ./libgcc_s.so.1 ]; then mv -f ./libgcc_s.so.1
./libgcc_s.so.1.backup; else true; fi && mv ./libgcc_s.so.1.tmp
./libgcc_s.so.1 && (echo "/* GNU ld script"; echo " Use the shared
library, but some functions are only in"; echo " the static library.
*/"; echo "GROUP ( libgcc_s.so.1 -lgcc )" ) > ./libgcc_s.so
collect2 version 8.2.1 20190114
/tmp/gcc-obj.x86_64-blug-linux-gnu/./gcc/collect-ld -plugin
/tmp/gcc-obj.x86_64-blug-linux-gnu/./gcc/liblto_plugin.so
-plugin-opt=/tmp/gcc-obj.x86_64-blug-linux-gnu/./gcc/lto-wrapper
-plugin-opt=-fresolution=/tmp/ccSDI4vt.res
--sysroot=/tmp/gcc-obj.x86_64-blug-linux-gnu/gcc/../x86_64-blug-linux-gnu
--eh-frame-hdr -m elf_x86_64 -shared -o ./libgcc_s.so.1.tmp crti.o
/tmp/gcc-obj.x86_64-blug-linux-gnu/./gcc/crtbeginS.o
-L/tmp/gcc-obj.x86_64-blug-linux-gnu/./gcc
-L/opt/cross/x86_64-blug-linux-gnu/bin
-L/opt/cross/x86_64-blug-linux-gnu/lib -L. -v --soname=libgcc_s.so.1
--version-script=libgcc.map _muldi3_s.o _negdi2_s.o _lshrdi3_s.o
_ashldi3_s.o _ashrdi3_s.o _cmpdi2_s.o _ucmpdi2_s.o _clear_cache_s.o
_trampoline_s.o __main_s.o _absvsi2_s.o _absvdi2_s.o _addvsi3_s.o
_addvdi3_s.o _subvsi3_s.o _subvdi3_s.o _mulvsi3_s.o _mulvdi3_s.o
_negvsi2_s.o _negvdi2_s.o _ctors_s.o _ffssi2_s.o _ffsdi2_s.o _clz_s.o
_clzsi2_s.o _clzdi2_s.o _ctzsi2_s.o _ctzdi2_s.o _popcount_tab_s.o
_popcountsi2_s.o _popcountdi2_s.o _paritysi2_s.o _paritydi2_s.o
_powisf2_s.o _powidf2_s.o _powixf2_s.o _mulhc3_s.o _mulsc3_s.o
_muldc3_s.o _mulxc3_s.o _divhc3_s.o _divsc3_s.o _divdc3_s.o _divxc3_s.o
_bswapsi2_s.o _bswapdi2_s.o _clrsbsi2_s.o _clrsbdi2_s.o _fixunssfsi_s.o
_fixunsdfsi_s.o _fixunsxfsi_s.o _fixsfdi_s.o _fixdfdi_s.o _fixxfdi_s.o
_fixunssfdi_s.o _fixunsdfdi_s.o _fixunsxfdi_s.o _floatdisf_s.o
_floatdidf_s.o _floatdixf_s.o _floatundisf_s.o _floatundidf_s.o
_floatundixf_s.o _divdi3_s.o _moddi3_s.o _divmoddi4_s.o _udivdi3_s.o
_umoddi3_s.o _udivmoddi4_s.o _udiv_w_sdiv_s.o cpuinfo_s.o
sfp-exceptions_s.o addtf3_s.o divtf3_s.o multf3_s.o negtf2_s.o
subtf3_s.o unordtf2_s.o fixtfsi_s.o fixunstfsi_s.o floatsitf_s.o
floatunsitf_s.o fixtfdi_s.o fixunstfdi_s.o floatditf_s.o floatunditf_s.o
fixtfti_s.o fixunstfti_s.o floattitf_s.o floatuntitf_s.o extendsftf2_s.o
extenddftf2_s.o extendxftf2_s.o trunctfsf2_s.o trunctfdf2_s.o
trunctfxf2_s.o getf2_s.o letf2_s.o eqtf2_s.o _divtc3_s.o _multc3_s.o
_powitf2_s.o enable-execute-stack_s.o unwind-dw2_s.o
unwind-dw2-fde-dip_s.o unwind-sjlj_s.o unwind-c_s.o emutls_s.o libgcc.a
-lc /tmp/gcc-obj.x86_64-blug-linux-gnu/./gcc/crtendS.o crtn.o
GNU ld (GNU Binutils) 2.31.1.20190116
/opt/cross/x86_64-blug-linux-gnu/bin/ld: cannot find crti.o: No such
file or directory
/opt/cross/x86_64-blug-linux-gnu/bin/ld: cannot find -lc
/opt/cross/x86_64-blug-linux-gnu/bin/ld: cannot find crtn.o: No such
file or directory
collect2: error: ld returned 1 exit status
But still:
/tmp/gcc-obj.x86_64-blug-linux-gnu/./gcc/xgcc
-B/tmp/gcc-obj.x86_64-blug-linux-gnu/./gcc/
-B/opt/cross/x86_64-blug-linux-gnu/bin/
-B/opt/cross/x86_64-blug-linux-gnu/lib/ -isystem
/opt/cross/x86_64-blug-linux-gnu/include -isystem
/opt/cross/x86_64-blug-linux-gnu/sys-include -O2 -g -O2 -DIN_GCC
-DCROSS_DIRECTORY_STRUCTURE -W -Wall -Wwrite-strings -Wcast-qual
-Wstrict-prototypes -Wmissing-prototypes -Wold-style-definition
-isystem ./include -fpic -mlong-double-80 -DUSE_ELF_SYMVER -g
-DIN_LIBGCC2 -fbuilding-libgcc -fno-stack-protector -shared
-nodefaultlibs -Wl,--soname=libgcc_s.so.1
-Wl,--version-script=libgcc.map -o ./libgcc_s.so.1.tmp -g -O2 -B./
_muldi3_s.o _negdi2_s.o _lshrdi3_s.o _ashldi3_s.o _ashrdi3_s.o
_cmpdi2_s.o _ucmpdi2_s.o _clear_cache_s.o _trampoline_s.o __main_s.o
_absvsi2_s.o _absvdi2_s.o _addvsi3_s.o _addvdi3_s.o _subvsi3_s.o
_subvdi3_s.o _mulvsi3_s.o _mulvdi3_s.o _negvsi2_s.o _negvdi2_s.o
_ctors_s.o _ffssi2_s.o _ffsdi2_s.o _clz_s.o _clzsi2_s.o _clzdi2_s.o
_ctzsi2_s.o _ctzdi2_s.o _popcount_tab_s.o _popcountsi2_s.o
_popcountdi2_s.o _paritysi2_s.o _paritydi2_s.o _powisf2_s.o _powidf2_s.o
_powixf2_s.o _mulhc3_s.o _mulsc3_s.o _muldc3_s.o _mulxc3_s.o _divhc3_s.o
_divsc3_s.o _divdc3_s.o _divxc3_s.o _bswapsi2_s.o _bswapdi2_s.o
_clrsbsi2_s.o _clrsbdi2_s.o _fixunssfsi_s.o _fixunsdfsi_s.o
_fixunsxfsi_s.o _fixsfdi_s.o _fixdfdi_s.o _fixxfdi_s.o _fixunssfdi_s.o
_fixunsdfdi_s.o _fixunsxfdi_s.o _floatdisf_s.o _floatdidf_s.o
_floatdixf_s.o _floatundisf_s.o _floatundidf_s.o _floatundixf_s.o
_divdi3_s.o _moddi3_s.o _divmoddi4_s.o _udivdi3_s.o _umoddi3_s.o
_udivmoddi4_s.o _udiv_w_sdiv_s.o cpuinfo_s.o sfp-exceptions_s.o
addtf3_s.o divtf3_s.o multf3_s.o negtf2_s.o subtf3_s.o unordtf2_s.o
fixtfsi_s.o fixunstfsi_s.o floatsitf_s.o floatunsitf_s.o fixtfdi_s.o
fixunstfdi_s.o floatditf_s.o floatunditf_s.o fixtfti_s.o fixunstfti_s.o
floattitf_s.o floatuntitf_s.o extendsftf2_s.o extenddftf2_s.o
extendxftf2_s.o trunctfsf2_s.o trunctfdf2_s.o trunctfxf2_s.o getf2_s.o
letf2_s.o eqtf2_s.o _divtc3_s.o _multc3_s.o _powitf2_s.o
enable-execute-stack_s.o unwind-dw2_s.o unwind-dw2-fde-dip_s.o
unwind-sjlj_s.o unwind-c_s.o emutls_s.o libgcc.a -lc && rm -f
./libgcc_s.so && if [ -f ./libgcc_s.so.1 ]; then mv -f ./libgcc_s.so.1
./libgcc_s.so.1.backup; else true; fi && mv ./libgcc_s.so.1.tmp
./libgcc_s.so.1 && (echo "/* GNU ld script"; echo " Use the shared
library, but some functions are only in"; echo " the static library.
*/"; echo "GROUP ( libgcc_s.so.1 -lgcc )" ) > ./libgcc_s.so
/opt/cross/x86_64-blug-linux-gnu/bin/ld: cannot find crti.o: No such
file or directory
/opt/cross/x86_64-blug-linux-gnu/bin/ld: cannot find -lc
/opt/cross/x86_64-blug-linux-gnu/bin/ld: cannot find crtn.o: No such
file or directory
collect2: error: ld returned 1 exit status
make[1]: *** [Makefile:985: libgcc_s.so] Error 1
make[1]: Leaving directory
'/tmp/gcc-obj.x86_64-blug-linux-gnu/x86_64-blug-linux-gnu/libgcc'
make: *** [Makefile:14671: all-target-libgcc] Error 2
If I instead configure binutils and gcc to use
--with-sysroot=/opt/cross/x86_64-blug-linux-gnu/sysroot or
/opt/cross/x86_64-blug-linux-gnu.sysroot, (and have the startup files in
there instead) I do not get the error. So it seems like gcc doesn't like
if sysroot is the same as tooldir.
Is this a bug or intended behavior?
I am not surprised if it doesn't work, since sysroot is for
cross-compilers, and you wouldn't usually want the host toolchain in
the same directory as the headers and libraries for the target,
because host != target.
In /opt/cross/x86_64-blug-linux-gnu you only find bin/ which contains
hard links to binutils. Everything else is stuff for the target like the
cross compiled libstdc++. I don't see a good reason why to keep the
cross compiled glibc away from the cross compiled libstdc++.
Keep in mind that, that does not mean that there doesn't exist a good
reason, I've just failed to see it.
The documentation does not state anything about where $sysroot should
be. Perhaps a note that it shouldn't (or can't) be the same thing as
$PREFIX/$TARGET is in place?
