https://gcc.gnu.org/bugzilla/show_bug.cgi?id=108433
Bug ID: 108433
Summary: canadian cross aarch64/x86_64/aarch64 fails to build
Product: gcc
Version: 13.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: libgcc
Assignee: unassigned at gcc dot gnu.org
Reporter: arnd at linaro dot org
Target Milestone: ---
I tried to build a set of cross compilers for all target architectures. Build
architecture is arm64, host architecture is x86_64 or ppc64le, both of them
fail the same way:
cc -g -O2 -O2 -g -O2 -DIN_GCC -DCROSS_DIRECTORY_STRUCTURE -W -Wall
-Wno-narrowing -Wwrite-strings -Wcast-qual -Wstrict-prototypes
-Wmissing-prototypes -Wold-style-definition -isystem ./include -fPIC -g
-DIN_LIBGCC2 -fbuilding-libgcc -fno-stack-protector -Dinhibit_libc -fPIC -I.
-I. -I../.././gcc -I/home/arnd/git/gcc/libgcc -I/home/arnd/git/gcc/libgcc/.
-I/home/arnd/git/gcc/libgcc/../gcc -I/home/arnd/git/gcc/libgcc/../include
-DHAVE_CC_TLS -o unwind-dw2-fde-dip.o -MT unwind-dw2-fde-dip.o -MD -MP -MF
unwind-dw2-fde-dip.dep -fexceptions -c
/home/arnd/git/gcc/libgcc/unwind-dw2-fde-dip.c -fvisibility=hidden
-DHIDE_EXPORTS
libgcc/unwind-dw2.c:967:20: error: ‘__LIBGCC_DWARF_CIE_DATA_ALIGNMENT__’
undeclared (first use in this function); did you mean
‘DWARF_CIE_DATA_ALIGNMENT’?
The problem seems to be caused by configure picking up /usr/bin/cc as the
compiler for building libgcc when in a canadian cross with build==target,
despite another aarch64-linux-gnu-gcc being provided for this purpose:
Configuring in aarch64-linux/libgcc
configure: creating cache ./config.cache
checking build system type... aarch64-unknown-linux-gnu
checking host system type... aarch64-unknown-linux-gnu
checking for --enable-version-specific-runtime-libs... no
checking for a BSD-compatible install... /usr/bin/install -c
checking for gawk... mawk
checking for aarch64-linux-ar...
/home/arnd/cross/arm64/gcc-13.0.1-nolibc/aarch64-linux/lib/gcc/aarch64-linux/13.0.1/../../../../aarch64-linux/bin/ar
checking for aarch64-linux-lipo... lipo
checking for aarch64-linux-nm...
/home/arnd/cross/arm64/gcc-13.0.1-nolibc/aarch64-linux/lib/gcc/aarch64-linux/13.0.1/../../../../aarch64-linux/bin/nm
checking for aarch64-linux-ranlib...
/home/arnd/cross/arm64/gcc-13.0.1-nolibc/aarch64-linux/lib/gcc/aarch64-linux/13.0.1/../../../../aarch64-linux/bin/ranlib
checking for aarch64-linux-strip...
/home/arnd/cross/arm64/gcc-13.0.1-nolibc/aarch64-linux/lib/gcc/aarch64-linux/13.0.1/../../../../aarch64-linux/bin/strip
checking whether ln -s works... yes
checking for aarch64-linux-gcc... cc
I think libgcc should either be built with the other compiler, or it should
avoid dependencies on the having a matching target compiler version in the
definition of __LIBGCC_DWARF_CIE_DATA_ALIGNMENT__.
