Hello, On Fri, 2025-07-25 at 10:11 +0200, John Paul Adrian Glaubitz wrote: > on ppc64, Thunderbird currently fails to build from source [1] due to an > upstream bug in the PowerPC backend in LLVM [2]. > > Could you override CC and CXX so Thunderbird is built with GCC instead of > Clang for the time being?
Attaching an updating patch. We actually need to export CC and CXX so all parts of the build make use of gcc and g++. This requires an additional patch which fixes an old keyword in moz.build for skia (see attached). Adrian -- .''`. John Paul Adrian Glaubitz : :' : Debian Developer `. `' Physicist `- GPG: 62FF 8A75 84E0 2956 9546 0006 7426 3B37 F5B5 F913
--- debian/rules.orig 2025-07-25 01:09:59.688831332 -0700 +++ debian/rules 2025-07-25 02:31:52.730623151 -0700 @@ -46,6 +46,11 @@ CFLAGS += -DSQLITE_BYTEORDER=1234 endif +ifneq (,$(filter ppc64,$(DEB_HOST_ARCH))) + export CC := gcc + export CXX := g++ +endif + # Reduce memory usage of the linker at the expense of processing time # This should help on lower-end architectures like arm and mips, which # spend an immense amount of time swapping.
--- thunderbird-128.12.0esr.orig/gfx/skia/moz.build +++ thunderbird-128.12.0esr/gfx/skia/moz.build @@ -371,7 +371,7 @@ UNIFIED_SOURCES += [ ] # Work around https://gcc.gnu.org/bugzilla/show_bug.cgi?id=110606 -if CONFIG['CC_TYPE'] == 'gcc' and CONFIG['CPU_ARCH'] == 'ppc64': +if CONFIG['CC_TYPE'] == 'gcc' and CONFIG['TARGET_CPU'] == 'ppc64': SOURCES += ['skia/src/sksl/SkSLInliner.cpp'] else: UNIFIED_SOURCES += ['skia/src/sksl/SkSLInliner.cpp']
