This compile error is hard to get, I got sometimes in an ARM server (real hardware) and always in launchpad (which uses qemu). If you compile without HAVE_MMAP = 1, you get zillions errors.
/usr/bin/make platform="armv hardfloat"
make[2]: Entering directory `/build/buildd/libretro-gpsp-0.9+r220~4~ubuntu14.04.1'
gcc -I. -g -O2 -fstack-protector --param=ssp-buffer-size=4 -Wformat -Werror=format-security -marm -mfloat-abi=hard -DARM -DARM_ARCH -DARM_MEMORY_DYNAREC -DHAVE_STRINGS_H -DHAVE_STDINT_H -DHAVE_INTTYPES_H -D__LIBRETRO__ -DINLINE=inline -Wall -Werror=implicit-function-declaration -DHAVE_DYNAREC -DARM_ARCH -DNDEBUG=1 -fPIC -DFRONTEND_SUPPORTS_RGB565 -O3 -DNDEBUG -c -o main.o main.c
gcc -I. -g -O2 -fstack-protector --param=ssp-buffer-size=4 -Wformat -Werror=format-security -marm -mfloat-abi=hard -DARM -DARM_ARCH -DARM_MEMORY_DYNAREC -DHAVE_STRINGS_H -DHAVE_STDINT_H -DHAVE_INTTYPES_H -D__LIBRETRO__ -DINLINE=inline -Wall -Werror=implicit-function-declaration -DHAVE_DYNAREC -DARM_ARCH -DNDEBUG=1 -fPIC -DFRONTEND_SUPPORTS_RGB565 -O3 -DNDEBUG -c -o cpu.o cpu.c
cpu.c: In function 'execute_arm':
cpu.c:198:7: warning: unused variable 'rn' [-Wunused-variable]
u32 rn = (opcode >> 12) & 0x0F; \
^
cpu.c:863:3: note: in expansion of macro 'arm_decode_multiply'
arm_decode_multiply(); \
^
cpu.c:1793:20: note: in expansion of macro 'arm_multiply'
arm_multiply(no_op, no);
^
cpu.c:198:7: warning: unused variable 'rn' [-Wunused-variable]
u32 rn = (opcode >> 12) & 0x0F; \
^
cpu.c:863:3: note: in expansion of macro 'arm_decode_multiply'
arm_decode_multiply(); \
^
cpu.c:1810:23: note: in expansion of macro 'arm_multiply'
arm_multiply(no_op, yes);
^
cpu.c:181:7: warning: unused variable 'rm' [-Wunused-variable]
u32 rm = opcode & 0x0F; \
^
cpu.c:924:3: note: in expansion of macro 'arm_decode_psr_reg'
arm_decode_psr_##op_type(opcode); \
^
cpu.c:2205:17: note: in expansion of macro 'arm_psr'
arm_psr(reg, read, reg[REG_CPSR]);
^
cpu.c:179:7: warning: unused variable 'psr_field' [-Wunused-variable]
u32 psr_field = (opcode >> 16) & 0x0F; \
^
cpu.c:924:3: note: in expansion of macro 'arm_decode_psr_reg'
arm_decode_psr_##op_type(opcode); \
^
cpu.c:2205:17: note: in expansion of macro 'arm_psr'
arm_psr(reg, read, reg[REG_CPSR]);
^
cpu.c:164:7: warning: unused variable 'rd' [-Wunused-variable]
u32 rd = (opcode >> 12) & 0x0F; \
^
cpu.c:751:3: note: in expansion of macro 'arm_decode_data_proc_reg'
arm_decode_data_proc_reg(opcode); \
^
cpu.c:822:3: note: in expansion of macro 'arm_data_proc_flags_reg'
arm_data_proc_flags_##type(); \
^
cpu.c:2233:17: note: in expansion of macro 'arm_data_proc_test_logic'
arm_data_proc_test_logic(reg[rn] & reg_sh, reg);
^
cpu.c:180:7: warning: unused variable 'rd' [-Wunused-variable]
u32 rd = (opcode >> 12) & 0x0F; \
^
cpu.c:924:3: note: in expansion of macro 'arm_decode_psr_reg'
arm_decode_psr_##op_type(opcode); \
^
cpu.c:2265:20: note: in expansion of macro 'arm_psr'
arm_psr(reg, store, cpsr);
^
cpu.c:164:7: warning: unused variable 'rd' [-Wunused-variable]
u32 rd = (opcode >> 12) & 0x0F; \
^
cpu.c:751:3: note: in expansion of macro 'arm_decode_data_proc_reg'
arm_decode_data_proc_reg(opcode); \
^
cpu.c:822:3: note: in expansion of macro 'arm_data_proc_flags_reg'
arm_data_proc_flags_##type(); \
^
cpu.c:2294:17: note: in expansion of macro 'arm_data_proc_test_logic'
arm_data_proc_test_logic(reg[rn] ^ reg_sh, reg);
^
cpu.c:181:7: warning: unused variable 'rm' [-Wunused-variable]
u32 rm = opcode & 0x0F; \
^
cpu.c:924:3: note: in expansion of macro 'arm_decode_psr_reg'
arm_decode_psr_##op_type(opcode); \
^
cpu.c:2315:17: note: in expansion of macro 'arm_psr'
arm_psr(reg, read, spsr[reg[CPU_MODE]]);
^
cpu.c:179:7: warning: unused variable 'psr_field' [-Wunused-variable]
u32 psr_field = (opcode >> 16) & 0x0F; \
^
cpu.c:924:3: note: in expansion of macro 'arm_decode_psr_reg'
arm_decode_psr_##op_type(opcode); \
^
cpu.c:2315:17: note: in expansion of macro 'arm_psr'
arm_psr(reg, read, spsr[reg[CPU_MODE]]);
^
cpu.c:164:7: warning: unused variable 'rd' [-Wunused-variable]
u32 rd = (opcode >> 12) & 0x0F; \
^
cpu.c:755:3: note: in expansion of macro 'arm_decode_data_proc_reg'
arm_decode_data_proc_reg(opcode); \
^
cpu.c:841:3: note: in expansion of macro 'arm_data_proc_reg'
arm_data_proc_##type(); \
^
cpu.c:2343:17: note: in expansion of macro 'arm_data_proc_test_sub'
arm_data_proc_test_sub(reg[rn], reg_sh, reg);
^
cpu.c:180:7: warning: unused variable 'rd' [-Wunused-variable]
u32 rd = (opcode >> 12) & 0x0F; \
^
cpu.c:924:3: note: in expansion of macro 'arm_decode_psr_reg'
arm_decode_psr_##op_type(opcode); \
^
cpu.c:2356:17: note: in expansion of macro 'arm_psr'
arm_psr(reg, store, spsr);
^
cpu.c:164:7: warning: unused variable 'rd' [-Wunused-variable]
u32 rd = (opcode >> 12) & 0x0F; \
^
cpu.c:755:3: note: in expansion of macro 'arm_decode_data_proc_reg'
arm_decode_data_proc_reg(opcode); \
^
cpu.c:831:3: note: in expansion of macro 'arm_data_proc_reg'
arm_data_proc_##type(); \
^
cpu.c:2384:17: note: in expansion of macro 'arm_data_proc_test_add'
arm_data_proc_test_add(reg[rn], reg_sh, reg);
^
cpu.c:163:7: warning: unused variable 'rn' [-Wunused-variable]
u32 rn = (opcode >> 16) & 0x0F; \
^
cpu.c:755:3: note: in expansion of macro 'arm_decode_data_proc_reg'
arm_decode_data_proc_reg(opcode); \
^
cpu.c:768:3: note: in expansion of macro 'arm_data_proc_reg'
arm_data_proc_##type(); \
^
cpu.c:2438:17: note: in expansion of macro 'arm_data_proc'
arm_data_proc(reg_sh, reg);
^
cpu.c:163:7: warning: unused variable 'rn' [-Wunused-variable]
u32 rn = (opcode >> 16) & 0x0F; \
^
cpu.c:751:3: note: in expansion of macro 'arm_decode_data_proc_reg'
arm_decode_data_proc_reg(opcode); \
^
cpu.c:787:3: note: in expansion of macro 'arm_data_proc_flags_reg'
arm_data_proc_flags_##type(); \
^
cpu.c:2466:17: note: in expansion of macro 'arm_data_proc_logic_flags'
arm_data_proc_logic_flags(reg_sh, reg);
^
cpu.c:163:7: warning: unused variable 'rn' [-Wunused-variable]
u32 rn = (opcode >> 16) & 0x0F; \
^
cpu.c:755:3: note: in expansion of macro 'arm_decode_data_proc_reg'
arm_decode_data_proc_reg(opcode); \
^
cpu.c:768:3: note: in expansion of macro 'arm_data_proc_reg'
arm_data_proc_##type(); \
^
cpu.c:2520:17: note: in expansion of macro 'arm_data_proc'
arm_data_proc(~reg_sh, reg);
^
cpu.c:163:7: warning: unused variable 'rn' [-Wunused-variable]
u32 rn = (opcode >> 16) & 0x0F; \
^
cpu.c:751:3: note: in expansion of macro 'arm_decode_data_proc_reg'
arm_decode_data_proc_reg(opcode); \
^
cpu.c:787:3: note: in expansion of macro 'arm_data_proc_flags_reg'
arm_data_proc_flags_##type(); \
^
cpu.c:2548:17: note: in expansion of macro 'arm_data_proc_logic_flags'
arm_data_proc_logic_flags(~reg_sh, reg);
^
cpu.c:172:7: warning: unused variable 'rd' [-Wunused-variable]
u32 rd = (opcode >> 12) & 0x0F; \
^
cpu.c:759:3: note: in expansion of macro 'arm_decode_data_proc_imm'
arm_decode_data_proc_imm(opcode) \
^
cpu.c:822:3: note: in expansion of macro 'arm_data_proc_flags_imm'
arm_data_proc_flags_##type(); \
^
cpu.c:2635:14: note: in expansion of macro 'arm_data_proc_test_logic'
arm_data_proc_test_logic(reg[rn] & imm, imm);
^
cpu.c:187:7: warning: unused variable 'rd' [-Wunused-variable]
u32 rd = (opcode >> 12) & 0x0F; \
^
cpu.c:924:3: note: in expansion of macro 'arm_decode_psr_imm'
arm_decode_psr_##op_type(opcode); \
^
cpu.c:2640:14: note: in expansion of macro 'arm_psr'
arm_psr(imm, store, cpsr);
^
cpu.c:172:7: warning: unused variable 'rd' [-Wunused-variable]
u32 rd = (opcode >> 12) & 0x0F; \
^
cpu.c:759:3: note: in expansion of macro 'arm_decode_data_proc_imm'
arm_decode_data_proc_imm(opcode) \
^
cpu.c:822:3: note: in expansion of macro 'arm_data_proc_flags_imm'
arm_data_proc_flags_##type(); \
^
cpu.c:2645:14: note: in expansion of macro 'arm_data_proc_test_logic'
arm_data_proc_test_logic(reg[rn] ^ imm, imm);
^
cpu.c:172:7: warning: unused variable 'rd' [-Wunused-variable]
u32 rd = (opcode >> 12) & 0x0F; \
^
cpu.c:762:3: note: in expansion of macro 'arm_decode_data_proc_imm'
arm_decode_data_proc_imm(opcode) \
^
cpu.c:841:3: note: in expansion of macro 'arm_data_proc_imm'
arm_data_proc_##type(); \
^
cpu.c:2651:14: note: in expansion of macro 'arm_data_proc_test_sub'
arm_data_proc_test_sub(reg[rn], imm, imm);
^
cpu.c:187:7: warning: unused variable 'rd' [-Wunused-variable]
u32 rd = (opcode >> 12) & 0x0F; \
^
cpu.c:924:3: note: in expansion of macro 'arm_decode_psr_imm'
arm_decode_psr_##op_type(opcode); \
^
cpu.c:2656:14: note: in expansion of macro 'arm_psr'
arm_psr(imm, store, spsr);
^
cpu.c:172:7: warning: unused variable 'rd' [-Wunused-variable]
u32 rd = (opcode >> 12) & 0x0F; \
^
cpu.c:762:3: note: in expansion of macro 'arm_decode_data_proc_imm'
arm_decode_data_proc_imm(opcode) \
^
cpu.c:831:3: note: in expansion of macro 'arm_data_proc_imm'
arm_data_proc_##type(); \
^
cpu.c:2661:14: note: in expansion of macro 'arm_data_proc_test_add'
arm_data_proc_test_add(reg[rn], imm, imm);
^
cpu.c:171:7: warning: unused variable 'rn' [-Wunused-variable]
u32 rn = (opcode >> 16) & 0x0F; \
^
cpu.c:762:3: note: in expansion of macro 'arm_decode_data_proc_imm'
arm_decode_data_proc_imm(opcode) \
^
cpu.c:768:3: note: in expansion of macro 'arm_data_proc_imm'
arm_data_proc_##type(); \
^
cpu.c:2676:14: note: in expansion of macro 'arm_data_proc'
arm_data_proc(imm, imm);
^
cpu.c:171:7: warning: unused variable 'rn' [-Wunused-variable]
u32 rn = (opcode >> 16) & 0x0F; \
^
cpu.c:759:3: note: in expansion of macro 'arm_decode_data_proc_imm'
arm_decode_data_proc_imm(opcode) \
^
cpu.c:787:3: note: in expansion of macro 'arm_data_proc_flags_imm'
arm_data_proc_flags_##type(); \
^
cpu.c:2681:14: note: in expansion of macro 'arm_data_proc_logic_flags'
arm_data_proc_logic_flags(imm, imm);
^
cpu.c:171:7: warning: unused variable 'rn' [-Wunused-variable]
u32 rn = (opcode >> 16) & 0x0F; \
^
cpu.c:762:3: note: in expansion of macro 'arm_decode_data_proc_imm'
arm_decode_data_proc_imm(opcode) \
^
cpu.c:768:3: note: in expansion of macro 'arm_data_proc_imm'
arm_data_proc_##type(); \
^
cpu.c:2696:14: note: in expansion of macro 'arm_data_proc'
arm_data_proc(~imm, imm);
^
cpu.c:171:7: warning: unused variable 'rn' [-Wunused-variable]
u32 rn = (opcode >> 16) & 0x0F; \
^
cpu.c:759:3: note: in expansion of macro 'arm_decode_data_proc_imm'
arm_decode_data_proc_imm(opcode) \
^
cpu.c:787:3: note: in expansion of macro 'arm_data_proc_flags_imm'
arm_data_proc_flags_##type(); \
^
cpu.c:2701:14: note: in expansion of macro 'arm_data_proc_logic_flags'
arm_data_proc_logic_flags(~imm, imm);
^
cpu.c:297:7: warning: unused variable 'rd' [-Wunused-variable]
u32 rd = ((opcode >> 4) & 0x08) | (opcode & 0x07); \
^
cpu.c:3649:17: note: in expansion of macro 'thumb_decode_hireg_op'
thumb_decode_hireg_op();
^
cpu.c:1658:7: warning: variable 'old_pc' set but not used [-Wunused-but-set-variable]
u32 old_pc;
^
gcc -I. -g -O2 -fstack-protector --param=ssp-buffer-size=4 -Wformat -Werror=format-security -marm -mfloat-abi=hard -DARM -DARM_ARCH -DARM_MEMORY_DYNAREC -DHAVE_STRINGS_H -DHAVE_STDINT_H -DHAVE_INTTYPES_H -D__LIBRETRO__ -DINLINE=inline -Wall -Werror=implicit-function-declaration -DHAVE_DYNAREC -DARM_ARCH -DNDEBUG=1 -fPIC -DFRONTEND_SUPPORTS_RGB565 -O3 -DNDEBUG -c -o gba_memory.o gba_memory.c
gba_memory.c: In function 'write_eeprom':
gba_memory.c:503:9: warning: dereferencing type-punned pointer will break strict-aliasing rules [-Wstrict-aliasing]
address16(eeprom_buffer, 0) = 0;
^
gba_memory.c:517:12: warning: dereferencing type-punned pointer will break strict-aliasing rules [-Wstrict-aliasing]
(address16(eeprom_buffer, 0) >> 2) * 8;
^
gba_memory.c:525:9: warning: dereferencing type-punned pointer will break strict-aliasing rules [-Wstrict-aliasing]
address16(eeprom_buffer, 0) = 0;
^
In file included from gba_memory.c:20:0:
gba_memory.c: In function 'load_backup':
common.h:124:10: warning: ignoring return value of 'fread', declared with attribute warn_unused_result [-Wunused-result]
fread(buffer, 1, size, filename_tag) \
^
gba_memory.c:2095:5: note: in expansion of macro 'file_read'
file_read(backup_file, gamepak_backup, backup_size);
^
gba_memory.c: In function 'load_gamepak_raw':
common.h:124:10: warning: ignoring return value of 'fread', declared with attribute warn_unused_result [-Wunused-result]
fread(buffer, 1, size, filename_tag) \
^
gba_memory.c:2417:7: note: in expansion of macro 'file_read'
file_read(gamepak_file, gamepak_rom, file_size);
^
common.h:124:10: warning: ignoring return value of 'fread', declared with attribute warn_unused_result [-Wunused-result]
fread(buffer, 1, size, filename_tag) \
^
gba_memory.c:2430:7: note: in expansion of macro 'file_read'
file_read(gamepak_file, gamepak_rom, 0x100);
^
gba_memory.c: In function 'load_bios':
common.h:124:10: warning: ignoring return value of 'fread', declared with attribute warn_unused_result [-Wunused-result]
fread(buffer, 1, size, filename_tag) \
^
gba_memory.c:2499:3: note: in expansion of macro 'file_read'
file_read(bios_file, bios_rom, 0x4000);
^
gba_memory.c: In function 'load_gamepak_page':
common.h:124:10: warning: ignoring return value of 'fread', declared with attribute warn_unused_result [-Wunused-result]
fread(buffer, 1, size, filename_tag) \
^
gba_memory.c:3232:3: note: in expansion of macro 'file_read'
file_read(gamepak_file_large, swap_location, (32 * 1024));
^
gcc -I. -g -O2 -fstack-protector --param=ssp-buffer-size=4 -Wformat -Werror=format-security -marm -mfloat-abi=hard -DARM -DARM_ARCH -DARM_MEMORY_DYNAREC -DHAVE_STRINGS_H -DHAVE_STDINT_H -DHAVE_INTTYPES_H -D__LIBRETRO__ -DINLINE=inline -Wall -Werror=implicit-function-declaration -DHAVE_DYNAREC -DARM_ARCH -DNDEBUG=1 -fPIC -DFRONTEND_SUPPORTS_RGB565 -O3 -DNDEBUG -c -o video.o video.c
gcc -I. -g -O2 -fstack-protector --param=ssp-buffer-size=4 -Wformat -Werror=format-security -marm -mfloat-abi=hard -DARM -DARM_ARCH -DARM_MEMORY_DYNAREC -DHAVE_STRINGS_H -DHAVE_STDINT_H -DHAVE_INTTYPES_H -D__LIBRETRO__ -DINLINE=inline -Wall -Werror=implicit-function-declaration -DHAVE_DYNAREC -DARM_ARCH -DNDEBUG=1 -fPIC -DFRONTEND_SUPPORTS_RGB565 -O3 -DNDEBUG -c -o input.o input.c
gcc -I. -g -O2 -fstack-protector --param=ssp-buffer-size=4 -Wformat -Werror=format-security -marm -mfloat-abi=hard -DARM -DARM_ARCH -DARM_MEMORY_DYNAREC -DHAVE_STRINGS_H -DHAVE_STDINT_H -DHAVE_INTTYPES_H -D__LIBRETRO__ -DINLINE=inline -Wall -Werror=implicit-function-declaration -DHAVE_DYNAREC -DARM_ARCH -DNDEBUG=1 -fPIC -DFRONTEND_SUPPORTS_RGB565 -O3 -DNDEBUG -c -o sound.o sound.c
gcc -I. -g -O2 -fstack-protector --param=ssp-buffer-size=4 -Wformat -Werror=format-security -marm -mfloat-abi=hard -DARM -DARM_ARCH -DARM_MEMORY_DYNAREC -DHAVE_STRINGS_H -DHAVE_STDINT_H -DHAVE_INTTYPES_H -D__LIBRETRO__ -DINLINE=inline -Wall -Werror=implicit-function-declaration -DHAVE_DYNAREC -DARM_ARCH -DNDEBUG=1 -fPIC -DFRONTEND_SUPPORTS_RGB565 -O3 -DNDEBUG -c -o cheats.o cheats.c
gcc -I. -g -O2 -fstack-protector --param=ssp-buffer-size=4 -Wformat -Werror=format-security -marm -mfloat-abi=hard -DARM -DARM_ARCH -DARM_MEMORY_DYNAREC -DHAVE_STRINGS_H -DHAVE_STDINT_H -DHAVE_INTTYPES_H -D__LIBRETRO__ -DINLINE=inline -Wall -Werror=implicit-function-declaration -DHAVE_DYNAREC -DARM_ARCH -DNDEBUG=1 -fPIC -DFRONTEND_SUPPORTS_RGB565 -O3 -DNDEBUG -c -o libretro.o libretro.c
In file included from libretro.c:6:0:
common.h:36:0: warning: "_BSD_SOURCE" redefined [enabled by default]
#define _BSD_SOURCE // sync
^
In file included from /usr/include/stdio.h:27:0,
from libretro.c:3:
/usr/include/features.h:188:0: note: this is the location of the previous definition
# define _BSD_SOURCE 1
^
gcc -I. -g -O2 -fstack-protector --param=ssp-buffer-size=4 -Wformat -Werror=format-security -marm -mfloat-abi=hard -DARM -DARM_ARCH -DARM_MEMORY_DYNAREC -DHAVE_STRINGS_H -DHAVE_STDINT_H -DHAVE_INTTYPES_H -D__LIBRETRO__ -DINLINE=inline -Wall -Werror=implicit-function-declaration -DHAVE_DYNAREC -DARM_ARCH -DNDEBUG=1 -fPIC -DFRONTEND_SUPPORTS_RGB565 -O3 -DNDEBUG -c -o libco/libco.o libco/libco.c
In file included from libco/libco.c:14:0:
libco/armeabi.c:39:13: warning: 'crash' defined but not used [-Wunused-function]
static void crash(void)
^
gcc -g -O2 -fstack-protector --param=ssp-buffer-size=4 -Wformat -Werror=format-security -marm -mfloat-abi=hard -DARM -DARM_ARCH -DARM_MEMORY_DYNAREC -DHAVE_STRINGS_H -DHAVE_STDINT_H -DHAVE_INTTYPES_H -D__LIBRETRO__ -DINLINE=inline -Wall -Werror=implicit-function-declaration -DHAVE_DYNAREC -DARM_ARCH -DNDEBUG=1 -fPIC -DFRONTEND_SUPPORTS_RGB565 -Wno-unused-variable -Wno-unused-label -O2 -DNDEBUG -c -o cpu_threaded.o cpu_threaded.c
cpu_threaded.c: In function 'translate_block_arm':
cpu_threaded.c:3261:7: warning: variable 'flag_status' set but not used [-Wunused-but-set-variable]
u32 flag_status;
^
cpu_threaded.c: In function 'translate_block_thumb':
cpu_threaded.c:3462:7: warning: variable 'last_condition' set but not used [-Wunused-but-set-variable]
u32 last_condition;
^
/tmp/cc8HwzJJ.s: Assembler messages:
/tmp/cc8HwzJJ.s:49244: Warning: ignoring changed section attributes for .jit
/tmp/cc8HwzJJ.s:102235: Error: can't resolve `.jit' {.jit section} - `.Ltext0' {.text section}
/tmp/cc8HwzJJ.s:102236: Error: can't resolve `.jit' {.jit section} - `.Ltext0' {.text section}
/tmp/cc8HwzJJ.s:102239: Error: can't resolve `.jit' {.jit section} - `.Ltext0' {.text section}
/tmp/cc8HwzJJ.s:102240: Error: can't resolve `.jit' {.jit section} - `.Ltext0' {.text section}
/tmp/cc8HwzJJ.s:102243: Error: can't resolve `.jit' {.jit section} - `.Ltext0' {.text section}
/tmp/cc8HwzJJ.s:102244: Error: can't resolve `.jit' {.jit section} - `.Ltext0' {.text section}
/tmp/cc8HwzJJ.s:102250: Error: can't resolve `.jit' {.jit section} - `.Ltext0' {.text section}
[...] (zillions errors...)
/tmp/cc8HwzJJ.s:150734: Error: can't resolve `.jit' {.jit section} - `.Ltext0' {.text section}
/tmp/cc8HwzJJ.s:150735: Error: can't resolve `.jit' {.jit section} - `.Ltext0' {.text section}
/tmp/cc8HwzJJ.s:150736: Error: can't resolve `.jit' {.jit section} - `.Ltext0' {.text section}
make[2]: *** [cpu_threaded.o] Error 1
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