Source: gcc-14 Version: 14.2.0-19 Severity: normal Tags: patch User: debian-...@lists.debian.org Usertags: m68k X-Debbugs-Cc: debian-...@lists.debian.org
Hello, the new RTL optimization introduced in [1] breaks the gcc-14 build on m68k. As discovered by the Gentoo m68k maintainers, building gcc-14 with the option -fno-fold-mem-offsets to disable this new optimization fixes this problem. The option does not seem to be needed on gcc-15 which builds fine in experimental [2]. I have used the following patch against the gcc-14 package to pass the option during build which works for me: --- debian/rules2.orig 2025-02-19 16:04:38.000000000 +0100 +++ debian/rules2 2025-06-06 11:55:20.606692824 +0200 @@ -227,6 +227,17 @@ endif endif +ifeq ($(DEB_TARGET_ARCH),m68k) + CFLAGS += -fno-fold-mem-offsets + CXXFLAGS += -fno-fold-mem-offsets + CFLAGS_FOR_BUILD += -fno-fold-mem-offsets + CXXFLAGS_FOR_BUILD += -fno-fold-mem-offsets + CFLAGS_FOR_TARGET += -fno-fold-mem-offsets + CXXFLAGS_FOR_TARGET += -fno-fold-mem-offsets + BOOT_CFLAGS += -fno-fold-mem-offsets + STAGE1_CFLAGS += -fno-fold-mem-offsets +endif + ifneq (,$(findstring -fno-omit-frame-pointer,$(shell DEB_HOST_ARCH=$(DEB_TARGET_ARCH) dpkg-buildflags --get CFLAGS))) CFLAGS_FRAME_POINTER = -fno-omit-frame-pointer else The gcc maintainer will certainly know better whether all of these are needed to fix the build and consequently avoid other packages from being miscompiled or failing to build. Thanks, Adrian > [1] > https://gcc.gnu.org/git/?p=gcc.git;a=commit;h=04c9cf5c786b94fbe3f6f21f06cae73a7575ff7a > [2] https://buildd.debian.org/status/package.php?p=gcc-15&suite=experimental -- .''`. John Paul Adrian Glaubitz : :' : Debian Developer `. `' Physicist `- GPG: 62FF 8A75 84E0 2956 9546 0006 7426 3B37 F5B5 F913
--- debian/rules2.orig 2025-02-19 16:04:38.000000000 +0100 +++ debian/rules2 2025-06-06 11:55:20.606692824 +0200 @@ -227,6 +227,17 @@ endif endif +ifeq ($(DEB_TARGET_ARCH),m68k) + CFLAGS += -fno-fold-mem-offsets + CXXFLAGS += -fno-fold-mem-offsets + CFLAGS_FOR_BUILD += -fno-fold-mem-offsets + CXXFLAGS_FOR_BUILD += -fno-fold-mem-offsets + CFLAGS_FOR_TARGET += -fno-fold-mem-offsets + CXXFLAGS_FOR_TARGET += -fno-fold-mem-offsets + BOOT_CFLAGS += -fno-fold-mem-offsets + STAGE1_CFLAGS += -fno-fold-mem-offsets +endif + ifneq (,$(findstring -fno-omit-frame-pointer,$(shell DEB_HOST_ARCH=$(DEB_TARGET_ARCH) dpkg-buildflags --get CFLAGS))) CFLAGS_FRAME_POINTER = -fno-omit-frame-pointer else
