Dear maintainer(s), grub2 fails to build from source with glibc 2.43, currently in experimental. From the build log: | cc -DHAVE_CONFIG_H -I. -I../.. -Wdate-time -D_FORTIFY_SOURCE=2 -Wall -W -DGRUB_UTIL=1 -D_FILE_OFFSET_BITS=64 -I./include -DGRUB_FILE=\"util/resolve.c\" -I. -I../.. -I. -I../.. -I../../include -I./include -I../../grub-core/lib/libgcrypt-grub/src/ -I./grub-core/lib/gnulib -I../../grub-core/lib/gnulib -D_FILE_OFFSET_BITS=64 -std=gnu99 -fno-common -Wall -Wno-error=unused-result -g -O2 -Werror=implicit-function-declaration -ffile-prefix-map=/build/reproducible-path/grub2-2.14=. -fstack-protector-strong -fstack-clash-protection -Wformat -Werror=format-security -mbranch-protection=standard -Wall -W -Wshadow -Wpointer-arith -Wundef -Wchar-subscripts -Wcomment -Wdeprecated-declarations -Wdisabled-optimization -Wdiv-by-zero -Wfloat-equal -Wformat-extra-args -Wformat-security -Wformat-y2k -Wimplicit -Wimplicit-function-declaration -Wimplicit-int -Wmain -Wmissing-braces -Wmissing-format-attribute -Wmultichar -Wparentheses -Wreturn-type -Wsequence-point -Wshadow -Wsign-compare -Wswitch -Wtrigraphs -Wunknown-pragmas -Wunused -Wunused-function -Wunused-label -Wunused-parameter -Wunused-value -Wunused-variable -Wwrite-strings -Wnested-externs -Wstrict-prototypes -Wcast-align -Wextra -Wattributes -Wendif-labels -Winit-self -Wint-to-pointer-cast -Winvalid-pch -Wmissing-field-initializers -Wnonnull -Woverflow -Wvla -Wpointer-to-int-cast -Wstrict-aliasing -Wvariadic-macros -Wvolatile-register-var -Wpointer-sign -Wmissing-include-dirs -Wmissing-prototypes -Wmissing-declarations -Wformat=2 -Werror -Wno-undef -Wno-sign-compare -Wno-unused -Wno-unused-parameter -Wno-redundant-decls -Wno-unreachable-code -Wno-conversion -Wno-error=attributes -c -o util/grub_editenv-resolve.o `test -f 'util/resolve.c' || echo '../../'`util/resolve.c ... | cc1: all warnings being treated as errors | ../../util/resolve.c: In function ‘get_module_name’: | ../../util/resolve.c:144:8: error: assignment discards ‘const’ qualifier from pointer target type [-Werror=discarded-qualifiers] | 144 | base = strrchr (str, '/'); | | ^ | ../../util/resolve.c: In function ‘get_module_path’: | ../../util/resolve.c:172:7: error: assignment discards ‘const’ qualifier from pointer target type [-Werror=discarded-qualifiers] | 172 | ext = strrchr (str, '.'); | | ^ | ../../util/resolve.c:181:7: error: assignment discards ‘const’ qualifier from pointer target type [-Werror=discarded-qualifiers] | 181 | dir = strchr (str, '/'); | | ^ ... | cc -DHAVE_CONFIG_H -I. -I../.. -Wdate-time -D_FORTIFY_SOURCE=2 -Wall -W -DGRUB_UTIL=1 -D_FILE_OFFSET_BITS=64 -I./include -DGRUB_FILE=\"util/resolve.c\" -I. -I../.. -I. -I../.. -I../../include -I./include -I../../grub-core/lib/libgcrypt-grub/src/ -I./grub-core/lib/gnulib -I../../grub-core/lib/gnulib -D_FILE_OFFSET_BITS=64 -std=gnu99 -fno-common -Wall -Wno-error=unused-result -g -O2 -Werror=implicit-function-declaration -ffile-prefix-map=/build/reproducible-path/grub2-2.14=. -fstack-protector-strong -fstack-clash-protection -Wformat -Werror=format-security -mbranch-protection=standard -Wall -W -Wshadow -Wpointer-arith -Wundef -Wchar-subscripts -Wcomment -Wdeprecated-declarations -Wdisabled-optimization -Wdiv-by-zero -Wfloat-equal -Wformat-extra-args -Wformat-security -Wformat-y2k -Wimplicit -Wimplicit-function-declaration -Wimplicit-int -Wmain -Wmissing-braces -Wmissing-format-attribute -Wmultichar -Wparentheses -Wreturn-type -Wsequence-point -Wshadow -Wsign-compare -Wswitch -Wtrigraphs -Wunknown-pragmas -Wunused -Wunused-function -Wunused-label -Wunused-parameter -Wunused-value -Wunused-variable -Wwrite-strings -Wnested-externs -Wstrict-prototypes -Wcast-align -Wextra -Wattributes -Wendif-labels -Winit-self -Wint-to-pointer-cast -Winvalid-pch -Wmissing-field-initializers -Wnonnull -Woverflow -Wvla -Wpointer-to-int-cast -Wstrict-aliasing -Wvariadic-macros -Wvolatile-register-var -Wpointer-sign -Wmissing-include-dirs -Wmissing-prototypes -Wmissing-declarations -Wformat=2 -Werror -Wno-undef -Wno-sign-compare -Wno-unused -Wno-unused-parameter -Wno-redundant-decls -Wno-unreachable-code -Wno-conversion -Wno-error=attributes -I/usr/include/efivar -c -o util/grub_mkrescue-resolve.o `test -f 'util/resolve.c' || echo '../../'`util/resolve.c | cc1: all warnings being treated as errors | ../../util/resolve.c: In function ‘get_module_name’: | ../../util/resolve.c:144:8: error: assignment discards ‘const’ qualifier from pointer target type [-Werror=discarded-qualifiers] | 144 | base = strrchr (str, '/'); | | ^ | ../../util/resolve.c: In function ‘get_module_path’: | ../../util/resolve.c:172:7: error: assignment discards ‘const’ qualifier from pointer target type [-Werror=discarded-qualifiers] | 172 | ext = strrchr (str, '.'); | | ^ | ../../util/resolve.c:181:7: error: assignment discards ‘const’ qualifier from pointer target type [-Werror=discarded-qualifiers] | 181 | dir = strchr (str, '/'); | | ^ | ../../util/resolve.c: In function ‘get_module_name’: | ../../util/resolve.c:144:8: error: assignment discards ‘const’ qualifier from pointer target type [-Werror=discarded-qualifiers] | 144 | base = strrchr (str, '/'); | | ^ | ../../util/resolve.c: In function ‘get_module_path’: | ../../util/resolve.c:172:7: error: assignment discards ‘const’ qualifier from pointer target type [-Werror=discarded-qualifiers] | 172 | ext = strrchr (str, '.'); | | ^ | ../../util/resolve.c:181:7: error: assignment discards ‘const’ qualifier from pointer target type [-Werror=discarded-qualifiers] | 181 | dir = strchr (str, '/'); | | ^ | make[4]: *** [Makefile:9805: util/grub_editenv-resolve.o] Error 1 | make[4]: *** Waiting for unfinished jobs.... | In file included from ../../grub-core/osdep/ofpath.c:2: | ../../grub-core/osdep/linux/ofpath.c: In function ‘check_sas’: | ../../grub-core/osdep/linux/ofpath.c:491:14: error: initialization discards ‘const’ qualifier from pointer target type [-Werror=discarded-qualifiers] | 491 | char *ed = strstr (sysfs_path, "end_device"); | | ^~~~~~ | cc1: all warnings being treated as errors | make[4]: *** [Makefile:11961: util/grub_mkstandalone-resolve.o] Error 1 | In file included from ../../grub-core/osdep/ofpath.c:2: | ../../grub-core/osdep/linux/ofpath.c: In function ‘check_sas’: | ../../grub-core/osdep/linux/ofpath.c:491:14: error: initialization discards ‘const’ qualifier from pointer target type [-Werror=discarded-qualifiers] | 491 | char *ed = strstr (sysfs_path, "end_device"); | | ^~~~~~ | cc1: all warnings being treated as errors | make[4]: *** [Makefile:11611: util/grub_mkrescue-resolve.o] Error 1 | cc1: all warnings being treated as errors | make[4]: *** [Makefile:11429: grub-core/osdep/grub_mkrescue-ofpath.o] Error 1 | cc1: all warnings being treated as errors | make[4]: *** [Makefile:11779: grub-core/osdep/grub_mkstandalone-ofpath.o] Error 1 | cc1: all warnings being treated as errors | make[4]: *** [Makefile:11009: grub-core/osdep/grub_mknetdir-ofpath.o] Error 1 | make[4]: Leaving directory '/build/reproducible-path/grub2-2.14/obj/grub-efi-arm64' | make[3]: *** [Makefile:12996: all-recursive] Error 1 | make[3]: Leaving directory '/build/reproducible-path/grub2-2.14/obj/grub-efi-arm64' | make[2]: *** [Makefile:4187: all] Error 2 | make[2]: Leaving directory '/build/reproducible-path/grub2-2.14/obj/grub-efi-arm64' | dh_auto_build: error: cd obj/grub-efi-arm64 && make -j128 returned exit code 2 | make[1]: *** [debian/rules:234: debian/stamps/build-grub-efi-arm64] Error 25 | make[1]: Leaving directory '/build/reproducible-path/grub2-2.14' | make: *** [debian/rules:148: binary] Error 2 | dpkg-buildpackage: error: debian/rules binary subprocess failed with exit status 2 The full build log is available here [1]. The issue is due to ISO C23 declaration of bsearch, memchr, strchr, strpbrk, strrchr, strstr, wcschr, wcspbrk, wcsrchr, wcsstr and wmemchr, which now returns a pointer to a const-qualified type when the input argument is a pointer to a const-qualified type [2]. I would like to thanks Emanuele Rocca for doing the archive rebuild on a fast arm64 server. Regards Aurelien [1] https://people.debian.org/~ema/glibc-2.43-rebuilds/output-1/grub2_arm64.build [2] https://sourceware.org/git/?p=glibc.git;a=blob;f=NEWS;h=e271fb2e4d76903c77a302aaec1ca22ce31027d0;hb=f762ccf84f122d1354f103a151cba8bde797d521#l19