[Qemu-devel] Parallel make build fails on fast machine

[Mark Cave-Ayland]

Hi all,

Today I tried transferring my QEMU development setup from my laptop onto a 
faster
desktop machine (Intel i7-6700) and was surprised to find my normal "full" build
script failing:

./configure --target-list='x86_64-softmmu sparc64-softmmu sparc-softmmu 
ppc-softmmu
arm-softmmu' --prefix=/home/build/rel-qemu-git
make V=1 -j2 install

Things start to go wrong around here:

cc -iquote /home/build/src/qemu/git/qemu/hw/i386/kvm -iquote hw/i386/kvm -iquote
/home/build/src/qemu/git/qemu/tcg -iquote /home/build/src/qemu/git/qemu/tcg/i386
-I/home/build/src/qemu/git/qemu/linux-headers
-I/home/build/src/qemu/git/qemu/linux-headers -iquote . -iquote
/home/build/src/qemu/git/qemu -iquote /home/build/src/qemu/git/qemu/accel/tcg 
-iquote
/home/build/src/qemu/git/qemu/include -I/usr/include/pixman-1
-I/home/build/src/qemu/git/qemu/dtc/libfdt -Werror  -pthread 
-I/usr/include/glib-2.0
-I/usr/lib/x86_64-linux-gnu/glib-2.0/include -fPIE -DPIE -m64 -mcx16 
-D_GNU_SOURCE
-D_FILE_OFFSET_BITS=64 -D_LARGEFILE_SOURCE -Wstrict-prototypes -Wredundant-decls
-Wall -Wundef -Wwrite-strings -Wmissing-prototypes -fno-strict-aliasing 
-fno-common
-fwrapv -std=gnu99  -Wendif-labels -Wno-shift-negative-value
-Wno-missing-include-dirs -Wempty-body -Wnested-externs -Wformat-security
-Wformat-y2k -Winit-self -Wignored-qualifiers -Wold-style-declaration
-Wold-style-definition -Wtype-limits -fstack-protector-strong
-I/usr/include/p11-kit-1   -I/usr/include/libpng16
-I/home/build/src/qemu/git/qemu/capstone/include  -I../linux-headers -iquote ..
-iquote /home/build/src/qemu/git/qemu/target/i386 -DNEED_CPU_H -iquote
/home/build/src/qemu/git/qemu/include -MMD -MP -MT hw/i386/kvm/i8259.o -MF
hw/i386/kvm/i8259.d -O2 -U_FORTIFY_SOURCE -D_FORTIFY_SOURCE=2 -g   -c -o
hw/i386/kvm/i8259.o /home/build/src/qemu/git/qemu/hw/i386/kvm/i8259.c
exec.o: In function `reclaim_ramblock':
/home/build/src/qemu/git/qemu/exec.c:2471: undefined reference to 
`qemu_ram_munmap'
/home/build/src/qemu/git/qemu/exec.c:2475: undefined reference to 
`qemu_anon_ram_free'
exec.o: In function `cpu_notify_map_clients_locked':
/home/build/src/qemu/git/qemu/exec.c:3579: undefined reference to 
`qemu_bh_schedule'
exec.o: In function `mtree_print_phys_entries':
/home/build/src/qemu/git/qemu/exec.c:4169: undefined reference to `qemu_printf'
/home/build/src/qemu/git/qemu/exec.c:4171: undefined reference to `qemu_printf'
/home/build/src/qemu/git/qemu/exec.c:4177: undefined reference to `qemu_printf'
/home/build/src/qemu/git/qemu/exec.c:4175: undefined reference to `qemu_printf'
/home/build/src/qemu/git/qemu/exec.c:4167: undefined reference to `qemu_printf'
exec.o:/home/build/src/qemu/git/qemu/exec.c:4173: more undefined references to
`qemu_printf' follow
exec.o: In function `rcu_read_lock':
/home/build/src/qemu/git/qemu/include/qemu/rcu.h:82: undefined reference to 
`rcu_gp_ctr'
/home/build/src/qemu/git/qemu/include/qemu/rcu.h:83: undefined reference to 
`rcu_reader'
exec.o: In function `rcu_read_unlock':
/home/build/src/qemu/git/qemu/include/qemu/rcu.h:93: undefined reference to 
`rcu_reader'
/home/build/src/qemu/git/qemu/include/qemu/rcu.h:109: undefined reference to
`rcu_gp_event'
exec.o: In function `rcu_read_lock':
/home/build/src/qemu/git/qemu/include/qemu/rcu.h:78: undefined reference to 
`rcu_reader'
exec.o: In function `cpu_physical_memory_set_dirty_range':
/home/build/src/qemu/git/qemu/include/exec/ram_addr.h:293: undefined reference 
to
`bitmap_set_atomic'
/home/build/src/qemu/git/qemu/include/exec/ram_addr.h:297: undefined reference 
to
`bitmap_set_atomic'
/home/build/src/qemu/git/qemu/include/exec/ram_addr.h:301: undefined reference 
to
`bitmap_set_atomic'
exec.o: In function `qemu_ram_setup_dump':
/home/build/src/qemu/git/qemu/exec.c:2020: undefined reference to `qemu_madvise'
exec.o: In function `cpu_physical_memory_range_includes_clean':
/home/build/src/qemu/git/qemu/include/exec/ram_addr.h:236: undefined reference 
to
`rcu_reader'
exec.o: In function `cpu_physical_memory_all_dirty':
/home/build/src/qemu/git/qemu/include/exec/ram_addr.h:190: undefined reference 
to
`find_next_zero_bit'
exec.o: In function `rcu_read_lock':
/home/build/src/qemu/git/qemu/include/qemu/rcu.h:78: undefined reference to 
`rcu_reader'
exec.o: In function `cpu_physical_memory_all_dirty':
/home/build/src/qemu/git/qemu/include/exec/ram_addr.h:190: undefined reference 
to
`find_next_zero_bit'
exec.o: In function `rcu_read_lock':
/home/build/src/qemu/git/qemu/include/qemu/rcu.h:78: undefined reference to 
`rcu_reader'
exec.o: In function `cpu_physical_memory_all_dirty':
/home/build/src/qemu/git/qemu/include/exec/ram_addr.h:190: undefined reference 
to
`find_next_zero_bit'
exec.o: In function `rcu_read_lock':
/home/build/src/qemu/git/qemu/include/qemu/rcu.h:78: undefined reference to 
`rcu_reader'
exec.o: In function `rcu_read_unlock':
/home/build/src/qemu/git/qemu/include/qemu/rcu.h:109: undefined reference to
`rcu_gp_event'
exec.o: In function `rcu_read_lock':
/home/build/src/qemu/git/qemu/include/qemu/rcu.h:82: undefined reference to 
`rcu_gp_ctr'
/home/build/src/qemu/git/qemu/include/qemu/rcu.h:78: undefined reference to 
`rcu_reader'
/home/build/src/qemu/git/qemu/include/qemu/rcu.h:78: undefined reference to 
`rcu_reader'
exec.o: In function `cpu_physical_memory_test_and_clear_dirty':
/home/build/src/qemu/git/qemu/exec.c:1378: undefined reference to
`bitmap_test_and_clear_atomic'
exec.o: In function `rcu_read_unlock':
/home/build/src/qemu/git/qemu/include/qemu/rcu.h:93: undefined reference to 
`rcu_reader'
/home/build/src/qemu/git/qemu/include/qemu/rcu.h:94: undefined reference to 
`rcu_reader'
/home/build/src/qemu/git/qemu/include/qemu/rcu.h:107: undefined reference to 
`rcu_reader'
/home/build/src/qemu/git/qemu/include/qemu/rcu.h:108: undefined reference to 
`rcu_reader'
/home/build/src/qemu/git/qemu/include/qemu/rcu.h:109: undefined reference to
`rcu_gp_event'
/home/build/src/qemu/git/qemu/include/qemu/rcu.h:109: undefined reference to
`qemu_event_set'
exec.o: In function `rcu_read_lock':
/home/build/src/qemu/git/qemu/include/qemu/rcu.h:82: undefined reference to 
`rcu_gp_ctr'
exec.o: In function `cpu_exec_initfn':
/home/build/src/qemu/git/qemu/exec.c:958: undefined reference to 
`qemu_get_thread_id'
exec.o: In function `parse_cpu_option':
/home/build/src/qemu/git/qemu/exec.c:1011: undefined reference to `error_fatal'
/home/build/src/qemu/git/qemu/exec.c:998: undefined reference to `error_report'
/home/build/src/qemu/git/qemu/exec.c:1004: undefined reference to `error_report'
exec.o: In function `rcu_read_lock':

For reference I've uploaded the full build output to
https://www.ilande.co.uk/tmp/qemu/qemu-parallel-make-fail.txt. I've also 
confirmed
that the build completes fine when removing the -j parameter from the make
incantation above.


ATB,

Mark.