Created attachment 858499 [details] build.log Note that I'm setting -Werror=return-type myself, but it's generally a problematic warning. Clang in particular aggressively optimises based on it. x86_64-pc-linux-gnu-gcc -Wall -c -I. -I"/var/tmp/portage/media-libs/netpbm-11.1.1/work/netpbm-11.1.1"/importinc -I/var/tmp/portage/media-libs/netpbm-11.1.1/work/netpbm-11.1.1/lib -DNDEBUG -fPIC -O2 -pipe -march=native -fdiagnostics-color=always -frecord-gcc-switches -Wreturn-type -Werror=implicit-function-declaration -Werror=implicit-int -Werror=return-type -Wformat -Werror=int-conversion -Waddress -Warray-bounds -Wfree-nonheap-object -Wimplicit-function-declaration -Wimplicit-int -Wincompatible-pointer-types -Wint-conversion -Wint-to-pointer-cast -Wmain -Wnonnull -Wodr -Wparentheses -Wreturn-type -Wsizeof-pointer-memaccess -Wstrict-aliasing -Wstring-compare -Wuninitialized -Wunused-value -Wvarargs -o libsystem.o libsystem.c make -C util/ -f /var/tmp/portage/media-libs/netpbm-11.1.1/work/netpbm-11.1.1/lib/util/Makefile \ SRCDIR=/var/tmp/portage/media-libs/netpbm-11.1.1/work/netpbm-11.1.1 BUILDDIR=/var/tmp/portage/media-libs/netpbm-11.1.1/work/netpbm-11.1.1 bitio.o libpnm3.c: In function ‘pnm_bittoxel’: libpnm3.c:437:1: error: control reaches end of non-void function [-Werror=return-type[https://gcc.gnu.org/onlinedocs/gcc/Warning-Options.html#index-Wreturn-type]] 437 | } | ^ make[2]: Entering directory '/var/tmp/portage/media-libs/netpbm-11.1.1/work/netpbm-11.1.1/lib/util' make[2]: 'bitio.o' is up to date. make[2]: Leaving directory '/var/tmp/portage/media-libs/netpbm-11.1.1/work/netpbm-11.1.1/lib/util' libpbmfont0.c: In function ‘pbm_defaultfont’: libpbmfont0.c:44:12: warning: ‘retval’ may be used uninitialized [-Wmaybe-uninitialized[https://gcc.gnu.org/onlinedocs/gcc/Warning-Options.html#index-Wmaybe-uninitialized]] 44 | return retval; | ^~~~~~ libpbmfont0.c:35:19: note: ‘retval’ was declared here 35 | struct font * retval; | ^~~~~~ [...]
$ emerge --info Portage 3.0.45.3 (python 3.11.2-final-0, default/linux/amd64/17.1/hardened, gcc-13, glibc-2.37-r1, 6.1.20-gentoo-dist-hardened x86_64) ================================================================= System uname: Linux-6.1.20-gentoo-dist-hardened-x86_64-AMD_Ryzen_9_3950X_16-Core_Processor-with-glibc2.37 KiB Mem: 65746424 total, 3100796 free KiB Swap: 8290300 total, 7739644 free Timestamp of repository gentoo: Mon, 20 Mar 2023 22:02:02 +0000 Head commit of repository gentoo: 315ab9b1d849129a4422361f75bd979a4edbb98c Timestamp of repository emacs: Fri, 17 Mar 2023 22:18:27 +0000 Head commit of repository emacs: b29552059b1ad0e13b6d3fb0d7e90a86f14aa0cb Timestamp of repository kde: Fri, 17 Mar 2023 22:18:47 +0000 Head commit of repository kde: a6d11cffd54ef372e36f74edd5985de2438942a1 Timestamp of repository qt: Sat, 18 Mar 2023 21:49:46 +0000 Head commit of repository qt: a0a2ab00e8f4b975d5210365ec2260bf4515e4bd Timestamp of repository sam_c: Sat, 18 Mar 2023 21:49:57 +0000 Head commit of repository sam_c: 9669e03cf446af625583efdaa92f92a1a25d2570 Timestamp of repository steam-overlay: Sat, 18 Mar 2023 21:49:46 +0000 Head commit of repository steam-overlay: 63f771c440e36af52b2d2dbda6293ac0840a2c95 sh dash 0.5.12 ld GNU ld (Gentoo 2.40 p3) 2.40.0 ccache version 4.8 [disabled] app-misc/pax-utils: 1.3.7::gentoo app-shells/bash: 5.2_p15-r2::gentoo dev-java/java-config: 2.3.1::gentoo dev-lang/perl: 5.36.0-r2::gentoo dev-lang/python: 3.9.16_p3::gentoo, 3.10.10_p3::gentoo, 3.11.2_p2::gentoo, 3.12.0_alpha6::gentoo dev-lang/rust: 1.67.1::gentoo dev-util/ccache: 4.8::gentoo dev-util/cmake: 3.26.0::gentoo dev-util/meson: 1.0.1::gentoo sys-apps/baselayout: 2.13-r1::gentoo sys-apps/sandbox: 2.30-r1::gentoo sys-apps/systemd: 253.1::gentoo sys-devel/autoconf: 2.13-r7::gentoo, 2.69-r8::gentoo, 2.71-r5::gentoo, 9999::gentoo sys-devel/automake: 1.16.5::gentoo sys-devel/binutils: 2.40-r3::gentoo sys-devel/binutils-config: 5.5::gentoo sys-devel/clang: 15.0.7-r1::gentoo, 16.0.0::gentoo, 17.0.0_pre20230314::gentoo sys-devel/gcc: 10.4.1_p20230316::gentoo, 11.3.1_p20230317::gentoo, 12.2.1_p20230318::gentoo, 13.0.1_pre20230319::gentoo sys-devel/gcc-config: 2.10::gentoo sys-devel/libtool: 2.4.7-r1::gentoo sys-devel/lld: 17.0.0_pre20230314::gentoo sys-devel/llvm: 14.0.6-r2::gentoo, 15.0.7::gentoo, 16.0.0::gentoo, 17.0.0_pre20230314::gentoo sys-devel/make: 4.4.1::gentoo sys-kernel/linux-headers: 6.2::gentoo (virtual/os-headers) sys-libs/glibc: 2.37-r1::gentoo Repositories: gentoo location: /var/db/repos/gentoo sync-type: git sync-uri: https://github.com/gentoo-mirror/gentoo.git priority: -1000 eclass-overrides: sam_c volatile: False sync-git-verify-commit-signature: yes sync-git-clone-extra-opts: -b stable -c gc.reflogExpire=0 -c gc.reflogExpireUnreachable=0 -c gc.rerereresolved=0 -c gc.rerereunresolved=0 -c gc.pruneExpire=now crossdev location: /var/db/repos/crossdev masters: gentoo eclass-overrides: sam_c volatile: True emacs location: /var/db/repos/emacs sync-type: git sync-uri: https://github.com/gentoo-mirror/emacs.git masters: gentoo eclass-overrides: sam_c volatile: False kde location: /var/db/repos/kde sync-type: git sync-uri: https://github.com/gentoo-mirror/kde.git masters: gentoo eclass-overrides: sam_c volatile: False local location: /var/db/repos/local masters: gentoo eclass-overrides: sam_c volatile: False qt location: /var/db/repos/qt sync-type: git sync-uri: https://github.com/gentoo-mirror/qt.git masters: gentoo eclass-overrides: sam_c volatile: False sam_c location: /var/db/repos/sam_c sync-type: git sync-uri: https://github.com/gentoo-mirror/sam_c.git masters: gentoo eclass-overrides: sam_c volatile: False steam-overlay location: /var/db/repos/steam-overlay sync-type: git sync-uri: https://github.com/gentoo-mirror/steam-overlay.git masters: gentoo eclass-overrides: sam_c volatile: False test location: /var/db/repos/test masters: gentoo eclass-overrides: sam_c volatile: False ACCEPT_KEYWORDS="amd64 ~amd64" 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Created attachment 859223 [details] fix the warnings
I checked. All of them are "impossible" cases, please check the attached patch. Not sure it's worth fixing. Also _Noreturn is deprecated in C23 and replaced by [[noreturn]], and the package does not use autoconf to easily test this.
Thanks, I'll check this soon.
Created attachment 859309 [details] fix the warnings - take 2 Same as before but added a macro for _Noreturn
