On Sun, May 23, 2021 at 12:47 PM BERTRAND Joël <joel.bertr...@systella.fr> wrote: > > Senthil Kumar a écrit : > > On Sat, May 22, 2021 at 1:21 AM BERTRAND Joël <joel.bertr...@systella.fr> > > wrote: > >> > >> Hello, > >> > >> I'm trying to build a recent gcc to check if my issue comes from > >> compiler or not. Thus, I have downloaded gcc 10.3.0 sources. Of course, > >> on my debian/testing workstation, I have avr avr-binutils and avr-libc. > >> > >> I have configured gcc with : > >> > >> hilbert:[~/cvs/cross-gcc/build] > ../gcc-10.3.0/configure -v > >> --enable-languages=c,c++,fortran --prefix=/home/bertrand/cvs/cross-gcc > >> --disable-nls --disable-libssp --target=avr --with-dwarf2 > >> > >> but build process hangs with : > >> > >> make[3] : on quitte le répertoire > >> « /home/bertrand/cvs/cross-gcc/build/avr/libgcc » > >> make[2] : on quitte le répertoire > >> « /home/bertrand/cvs/cross-gcc/build/avr/libgcc » > >> Checking multilib configuration for libbacktrace... > >> Configuring in avr/libbacktrace > >> configure: loading cache ./config.cache > >> checking build system type... x86_64-pc-linux-gnu > >> checking host system type... avr-unknown-none > >> checking target system type... avr-unknown-none > >> checking for avr-gcc... /home/bertrand/cvs/cross-gcc/build/./gcc/xgcc > >> -B/home/bertrand/cvs/cross-gcc/build/./gcc/ > >> -B/home/bertrand/cvs/cross-gcc/avr/bin/ > >> -B/home/bertrand/cvs/cross-gcc/avr/lib/ -isystem > >> /home/bertrand/cvs/cross-gcc/avr/include -isystem > >> /home/bertrand/cvs/cross-gcc/avr/sys-include > >> checking whether the C compiler works... no > >> configure: error: in `/home/bertrand/cvs/cross-gcc/build/avr/libbacktrace': > >> configure: error: C compiler cannot create executables > >> See `config.log' for more details > >> make[1]: *** [Makefile:12412 : configure-target-libbacktrace] Erreur 1 > >> make[1] : on quitte le répertoire « /home/bertrand/cvs/cross-gcc/build » > >> make: *** [Makefile:938 : all] Erreur 2 > >> hilbert:[~/cvs/cross-gcc/build] > > >> > >> Config log contains: > >> configure:3078: /home/bertrand/cvs/cross-gcc/build/./gcc/xgcc > >> -B/home/bertrand/cvs/cross-gcc/build/./gcc/ > >> -B/home/bertrand/cvs/cross-gcc/avr/bin/ > >> -B/home/bertrand/cvs/cross-gcc/avr/lib/ -isystem > >> /home/bertrand/cvs/cross-gcc/avr/include -isystem > >> /home/bertrand/cvs/cross-gcc/avr/sys-include -g -O2 conftest.c >&5 > >> /usr/bin/avr-ld: cannot find -lm > >> /usr/bin/avr-ld: cannot find -lc > >> collect2: error: ld returned 1 exit status > >> configure:3082: $? = 1 > >> configure:3120: result: no > >> configure: failed program was: > >> | /* confdefs.h */ > >> | #define PACKAGE_NAME "package-unused" > >> | #define PACKAGE_TARNAME "libbacktrace" > >> | #define PACKAGE_VERSION "version-unused" > >> | #define PACKAGE_STRING "package-unused version-unused" > >> | #define PACKAGE_BUGREPORT "" > >> | #define PACKAGE_URL "" > >> | /* end confdefs.h. */ > >> | > >> | int > >> | main () > >> | { > >> | > >> | ; > >> | return 0; > >> | } > >> configure:3125: error: in > >> `/home/bertrand/cvs/cross-gcc/build/avr/libbacktrace': > >> configure:3127: error: C compiler cannot create executables > >> See `config.log' for more details > >> > >> OK. xgcc tries to build an avr executable and doesn't find libm and > >> libc. But even if I add LDFLAGS on configure command line, make always > >> returns this error. I suppose I have done a mistake... > > > > Did you try building and installing avr-libc also at the same --prefix > > location? > > No, avr-libc is installed in /usr/lib/avr, but I have tried to add > LDFLAGS on configure command line without any success.
LDFLAGS, CFLAGS etc.. are used when building the binary that runs on the host (i.e xgcc in your example). I haven't tried building gcc against avr-libc installed at a different prefix, but could you try BOOT_LDFLAGS and see if it helps? > > I have tried to build cross compiler with ct-ng also without any > success (from gcc 6.x to 11.x). Same error. ct-ng builds its own > avr-libc and doesn't use system avr-libc. I haven't used that tool either. I'll try building gcc 10.3 from scratch tonight and post the steps I used. > > Best regards, > > JB