[Bug bootstrap/93548] New: gcc build tries to modify source tree

[bernd.edlinger at hotmail dot de]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=93548

            Bug ID: 93548
           Summary: gcc build tries to modify source tree
           Product: gcc
           Version: unknown
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: bootstrap
          Assignee: unassigned at gcc dot gnu.org
          Reporter: bernd.edlinger at hotmail dot de
  Target Milestone: ---

I build gcc with read only source tree,
this worked all the time, but now it does no longer:


 ../gcc-trunk-0/configure --prefix=/home/ed/gnu/arm-linux-gnueabihf
--enable-languages=all --with-arch=armv7-a --with-tune=cortex-a9
--with-fpu=vfpv3-d16 --with-float=hard

make Fails, because it attempts to modify the source code;

HEADERS="auto-host.h ansidecl.h" DEFINES="" \
/bin/sh ../../gcc-trunk-0/gcc/mkconfig.sh config.h
TARGET_CPU_DEFAULT="\"arm10e\"" \
HEADERS="options.h insn-constants.h config/vxworks-dummy.h config/dbxelf.h
config/elfos.h config/gnu-user.h config/linux.h config/linux-android.h
config/glibc-stdint.h config/arm/elf.h config/arm/linux-gas.h
config/arm/linux-elf.h config/arm/bpabi.h config/arm/linux-eabi.h
config/arm/aout.h config/arm/arm.h config/initfini-array.h defaults.h"
DEFINES="LIBC_GLIBC=1 LIBC_UCLIBC=2 LIBC_BIONIC=3 LIBC_MUSL=4
DEFAULT_LIBC=LIBC_GLIBC ANDROID_DEFAULT=0" \
/bin/sh ../../gcc-trunk-0/gcc/mkconfig.sh tm.h
TARGET_CPU_DEFAULT="" \
HEADERS="config/arm/arm-flags.h config/arm/arm-protos.h
config/arm/aarch-common-protos.h config/linux-protos.h tm-preds.h" DEFINES="" \
/bin/sh ../../gcc-trunk-0/gcc/mkconfig.sh tm_p.h
gawk -f ../../gcc-trunk-0/gcc/config/arm/parsecpu.awk -v cmd=md \
        ../../gcc-trunk-0/gcc/config/arm/arm-cpus.in > arm-tune.new
mv arm-tune.new ../../gcc-trunk-0/gcc/config/arm/arm-tune.md
mv: can't rename 'arm-tune.new': Permission denied
make[3]: *** [../../gcc-trunk-0/gcc/config/arm/arm-tune.md] Error 1
make[3]: *** Waiting for unfinished jobs....
make[3]: Leaving directory `/home/ed/gnu/gcc-build-arm-linux-gnueabihf/gcc'
make[2]: *** [all-stage1-gcc] Error 2
make[2]: Leaving directory `/home/ed/gnu/gcc-build-arm-linux-gnueabihf'
make[1]: *** [stage1-bubble] Error 2
make[1]: Leaving directory `/home/ed/gnu/gcc-build-arm-linux-gnueabihf'
make: *** [all] Error 2