-----Original Message----- From: Ian Lance Taylor [mailto:iant@xxxxxxxxxx] Sent: Sunday, February 12, 2012 11:04 AM To: Prashant Batra (prbatra) Cc: Jonathan Wakely; gcc-help@xxxxxxxxxxx Subject: Re: help needed for builing gcc tool-chain "Prashant Batra (prbatra)" <prbatra@xxxxxxxxx> writes: > Still it fails saying - "The directory that should contain system > headers does not exist:" What precisely did you do, and what precisely did you see? > The documentation of --with-sysroot says "sysroot will be searched for > target system headers, libraries and run time objects", but I am > building gcc at this stage, so if I am building gcc forsome target, how > are these target system headers be present there" You put them there yourself beforehand. E.g., if the target system is a Unix system, you put the contens of /usr/include and /lib and /usr/lib in the sysroot (in SYSROOT/usr/include, SYSROOT/lib, etc.). [Prashant] Yes, I had put /usr/include, /usr/lib, etc into SYSROOT/usr/include, /SYSROOT/usr/lib, and compilation moved ahead. Not, it fails at at- /auto/nobackup-bgl-mitg-dev56/prbatra/fresh2/objdir/./gcc/xgcc -B/auto/nobackup-bgl-mitg-dev56/prbatra/fresh2/objdir/./gcc/ -B/auto/nobackup-bgl-mitg-dev56/prbatra/fresh2/build//x86_64-unknown-lin ux-gnu/bin/ -B/auto/nobackup-bgl-mitg-dev56/prbatra/fresh2/build//x86_64-unknown-lin ux-gnu/lib/ -isystem /auto/nobackup-bgl-mitg-dev56/prbatra/fresh2/build//x86_64-unknown-linux -gnu/include -isystem /auto/nobackup-bgl-mitg-dev56/prbatra/fresh2/build//x86_64-unknown-linux -gnu/sys-include -O2 -O2 -g -O2 -DIN_GCC -W -Wall -Wwrite-strings -Wstrict-prototypes -Wmissing-prototypes -Wold-style-definition -isystem ./include -fPIC -g -DHAVE_GTHR_DEFAULT -DIN_LIBGCC2 -D__GCC_FLOAT_NOT_NEEDED -shared -nodefaultlibs -Wl,--soname=libgcc_s.so.1 -Wl,--version-script=libgcc/./libgcc.map -o ./libgcc_s.so.1.tmp libgcc/./_muldi3_s.o libgcc/./_negdi2_s.o libgcc/./_lshrdi3_s.o libgcc/./_ashldi3_s.o libgcc/./_ashrdi3_s.o libgcc/./_cmpdi2_s.o libgcc/./_ucmpdi2_s.o libgcc/./_clear_cache_s.o libgcc/./_enable_execute_stack_s.o libgcc/./_trampoline_s.o libgcc/./__main_s.o libgcc/./_absvsi2_s.o libgcc/./_absvdi2_s.o libgcc/./_addvsi3_s.o libgcc/./_addvdi3_s.o libgcc/./_subvsi3_s.o libgcc/./_subvdi3_s.o libgcc/./_mulvsi3_s.o libgcc/./_mulvdi3_s.o libgcc/./_negvsi2_s.o libgcc/./_negvdi2_s.o libgcc/./_ctors_s.o libgcc/./_ffssi2_s.o libgcc/./_ffsdi2_s.o libgcc/./_clz_s.o libgcc/./_clzsi2_s.o libgcc/./_clzdi2_s.o libgcc/./_ctzsi2_s.o libgcc/./_ctzdi2_s.o libgcc/./_popcount_tab_s.o libgcc/./_popcountsi2_s.o libgcc/./_popcountdi2_s.o libgcc/./_paritysi2_s.o libgcc/./_paritydi2_s.o libgcc/./_powisf2_s.o libgcc/./_powidf2_s.o libgcc/./_powixf2_s.o libgcc/./_powitf2_s.o libgcc/./_mulsc3_s.o libgcc/./_muldc3_s.o libgcc/./_mulxc3_s.o libgcc/./_multc3_s.o libgcc/./_divsc3_s.o libgcc/./_divdc3_s.o libgcc/./_divxc3_s.o libgcc/./_divtc3_s.o libgcc/./_fixunssfsi_s.o libgcc/./_fixunsdfsi_s.o libgcc/./_fixunsxfsi_s.o libgcc/./_fixsfdi_s.o libgcc/./_fixunssfdi_s.o libgcc/./_floatdisf_s.o libgcc/./_fixdfdi_s.o libgcc/./_fixunsdfdi_s.o libgcc/./_floatdidf_s.o libgcc/./_fixxfdi_s.o libgcc/./_fixunsxfdi_s.o libgcc/./_floatdixf_s.o libgcc/./_fixtfdi_s.o libgcc/./_fixunstfdi_s.o libgcc/./_floatditf_s.o libgcc/./_divdi3_s.o libgcc/./_moddi3_s.o libgcc/./_udivdi3_s.o libgcc/./_umoddi3_s.o libgcc/./_udiv_w_sdiv_s.o libgcc/./_udivmoddi4_s.o libgcc/./unwind-dw2_s.o libgcc/./unwind-dw2-fde-glibc_s.o libgcc/./unwind-sjlj_s.o libgcc/./gthr-gnat_s.o libgcc/./unwind-c_s.o -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 && ln -s libgcc_s.so.1 ./libgcc_s.so /usr/bin/ld: this linker was not configured to use sysroots collect2: ld returned 1 exit status make-3.79.1-p7[3]: *** [libgcc_s.so] Error 1 make-3.79.1-p7[3]: Leaving directory `/auto/nobackup-bgl-mitg-dev56/prbatra/fresh2/objdir/gcc' Do, I need to build binutils with sysroot as well, and install it into the same prefix? If yes, after building and installing binutils, how do I make use of this linker while building gcc? Thanks for the help. Ian
