Hello,
my computer tried to build gcc in gcc-10.2.0 This happend after ./configure ... sudo make on ubuntu mint 20.1: TARGET_CPU_DEFAULT="" \ HEADERS="auto-host.h ansidecl.h" DEFINES="" \ /bin/bash ./mkconfig.sh config.h TARGET_CPU_DEFAULT="" \ HEADERS="options.h insn-constants.h config/vxworks-dummy.h config/i386/biarch64.h config/i386/i386.h config/i386/unix.h config/i386/att.h config/dbxelf.h config/elfos.h config/gnu-user.h config/glibc-stdint.h config/i386/x86-64.h config/i386/gnu-user-common.h config/i386/gnu-user64.h config/linux.h config/linux-android.h config/i386/linux-common.h config/i386/linux64.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/bash ./mkconfig.sh tm.h TARGET_CPU_DEFAULT="" \ HEADERS="config/i386/i386-protos.h config/linux-protos.h tm-preds.h" DEFINES="" \ /bin/bash ./mkconfig.sh tm_p.h TARGET_CPU_DEFAULT="" \ HEADERS="auto-host.h ansidecl.h" DEFINES="" \ /bin/bash ./mkconfig.sh bconfig.h g++ -c -g -DIN_GCC -fno-exceptions -fno-rtti -fasynchronous-unwind-tables -W -Wall -Wno-narrowing -Wwrite-strings -Wcast-qual -Wmissing-format-attribute -Woverloaded-virtual -pedantic -Wno-long-long -Wno-variadic-macros -Wno-overlength-strings -fno-common -DHAVE_CONFIG_H -DGENERATOR_FILE -fno-PIE -I. -Ibuild -I. -I./build -I./../include -I./../libcpp/include \ -o build/genmodes.o genmodes.c In file included from bconfig.h:3, from genmodes.c:20: auto-host.h:2539:16: error: declaration does not declare anything [-fpermissive] 2539 | #define rlim_t long | ^~~~ In file included from genmodes.c:21: system.h:495:14: error: conflicting declaration of C function 'void* sbrk(int)' 495 | extern void *sbrk (int); | ^~~~ In file included from system.h:301, from genmodes.c:21: /usr/include/unistd.h:1041:14: note: previous declaration 'void* sbrk(intptr_t)' 1041 | extern void *sbrk (intptr_t __delta) __THROW; | ^~~~ In file included from genmodes.c:21: system.h:503:14: error: ambiguating new declaration of 'char* strstr(const char*, const char*)' 503 | extern char *strstr (const char *, const char *); | ^~~~~~ In file included from /usr/include/c++/9/cstring:42, from system.h:241, from genmodes.c:21: /usr/include/string.h:312:20: note: old declaration 'const char* strstr(const char*, const char*)' 312 | extern const char *strstr (const char *__haystack, const char *__needle) | ^~~~~~ In file included from genmodes.c:21: system.h:551:20: error: conflicting declaration of C function 'const char* strsignal(int)' 551 | extern const char *strsignal (int); | ^~~~~~~~~ In file included from /usr/include/c++/9/cstring:42, from system.h:241, from genmodes.c:21: /usr/include/string.h:447:14: note: previous declaration 'char* strsignal(int)' 447 | extern char *strsignal (int __sig) __THROW; | ^~~~~~~~~ In file included from system.h:702, from genmodes.c:21: ./../include/libiberty.h:112:14: error: ambiguating new declaration of 'char* basename(const char*)' 112 | extern char *basename (const char *) ATTRIBUTE_RETURNS_NONNULL ATTRIBUTE_NONNULL(1); | ^~~~~~~~ In file included from /usr/include/c++/9/cstring:42, from system.h:241, from genmodes.c:21: /usr/include/string.h:484:26: note: old declaration 'const char* basename(const char*)' 484 | extern "C++" const char *basename (const char *__filename) | ^~~~~~~~ make: *** [Makefile:2798: build/genmodes.o] Error 1 Best regards, Benjamin-Elias Probst