46405 2023-06-06 16:23:49 +0300 potrace: ошибка сборки на не-x86 архитектурах 2023-08-31 15:58:32 +0300 1 1 4 Development Sisyphus potrace unstable all Linux CLOSED FIXED P5 normal --- 1 asheplyakov aris aris asheplyakov iv sin qa-sisyphus oldest_to_newest 227092 0 asheplyakov 2023-06-06 16:23:49 +0300 libtool: compile: loongarch64-alt-linux-gcc -DHAVE_CONFIG_H -I. -I.. -pipe -frecord-gcc-switches -Wall -g -O2 -flto=auto -c trace.c -fPIC -DPIC -o .libs/trace.o make[2]: Leaving directory '/usr/src/RPM/BUILD/potrace-1.16/src' make[2]: Entering directory '/usr/src/RPM/BUILD/potrace-1.16/src' /bin/sh ../libtool --tag=CC --mode=link loongarch64-alt-linux-gcc -pipe -frecord-gcc-switches -Wall -g -O2 -flto=auto -o mkbitmap mkbitmap.o bitmap_io.o greymap.o -lm libtool: link: loongarch64-alt-linux-gcc -pipe -frecord-gcc-switches -Wall -g -O2 -flto=auto -o mkbitmap mkbitmap.o bitmap_io.o greymap.o -lm {standard input}: Assembler messages: {standard input}:3817: Error: no match insn: bsf $r12,$r14 {standard input}:3818: Error: no match insn: jnz 0f {standard input}:3819: Error: no match insn: movl $32,$r14 {standard input}:3839: Error: no match insn: bsf $r12,$r13 {standard input}:3840: Error: no match insn: jnz 0f {standard input}:3841: Error: no match insn: movl $32,$r13 {standard input}:3852: Error: no match insn: bsf $r12,$r12 {standard input}:3853: Error: no match insn: jnz 0f {standard input}:3854: Error: no match insn: movl $32,$r12 make[3]: *** [/usr/src/tmp/cckhtRVf.mk:2: /usr/src/tmp/ccI17jqP.ltrans0.ltrans.o] Error 1 lto-wrapper: fatal error: make returned 2 exit status compilation terminated. ld: error: lto-wrapper failed collect2: error: ld returned 1 exit status При этом в выводе configure скрипта checking for uint64_t... yes checking for getopt_long... yes checking whether getopt_long reorders its arguments... yes checking whether to use included getopt... no checking for strcasecmp... yes checking for strncasecmp... yes checking for Intel 386... yes 227093 1 asheplyakov 2023-06-06 16:48:10 +0300 Вот тестовая программа, с помощью которой configure проверяет, можно ли использовать x86 ассемблер: int main() { int x; asm("bsf %1,%0\njnz 0f\nmovl $32,%0\n0:":"=r"(x):"r"(x)); return x; } Обычно при обработке директивы asm компилятор обрабатывает только ограничения на регистры (constraints) (ну и clobbers), а то, что в двойных кавычках, скармливает ассемблеру. Но данная программа содержит неопределённое поведение (undefined behavior), а именно чтение неинициализированной переменной x. Поэтому оптимизатор решает просто выбросить всю эту строчку. По-простому говоря - какая разница, какой именно мусор вернёт main, можно вернуть просто то, что изначально было в x. То есть преобразует этот тест в int main() { int x; return x; } Никаких инструкций, специфичных для x86, здесь не остаётся, так что тест успешно собирается на любой архитектуре, где осмыслены ограничения "=r", "r" (то есть чуть менее, чем везде). 227095 2 asheplyakov 2023-06-06 16:59:13 +0300 Сразу отвечу на вопрос -- "а как же пакет раньше собирался?". Крайний раз его пересобирали до того, как в добровольно-принудительном порядке внедрили LTO. 227096 3 13393 asheplyakov 2023-06-06 17:00:01 +0300 Created attachment 13393 исправление проблемы 227101 4 13394 asheplyakov 2023-06-06 17:41:46 +0300 Created attachment 13394 таки исправление проблемы 227102 5 asheplyakov 2023-06-06 17:43:20 +0300 (Ответ для Alexey Sheplyakov на комментарий #4) > Создано вложение 13394 [подробности] > таки исправление проблемы Чтобы LTO не выпилил asm (даже вполне корректный), понадобилось пометить volatile и добавить "memory" clobber. 232262 6 repository-robot 2023-08-31 15:58:32 +0300 potrace-1.16-alt2 -> sisyphus: Tue Jun 06 2023 Alexey Sheplyakov <asheplyakov@altlinux> 1.16-alt2 - Fixed compilation error on non-x86 architectures (closes: #46405) 13393 2023-06-06 17:00:01 +0300 2023-06-06 17:41:46 +0300 исправление проблемы 0001-Fixed-i386-misdetection-on-non-x86-architectures.patch text/plain 2489 asheplyakov 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