https://gcc.gnu.org/bugzilla/show_bug.cgi?id=93157
Bug ID: 93157
Summary: gcc should use -mabi=elfv2 on powerpc64-*-linux-*musl*
target by default.
Product: gcc
Version: unknown
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: target
Assignee: unassigned at gcc dot gnu.org
Reporter: gyakovlev at gentoo dot org
Target Milestone: ---
encountered with 9.2.0 but I think all versions affected.
By default at configuration time gcc assumes that powerpc64-*-linux-* (big
endian ppc64) targets use ELFv1 ABI, and ELFv2 abi on little-endian.
But musl libc does not support ELFv1 at all on either endian ppc64.
Their INSTALL file clearly mentions:
* PowerPC64
* Both little and big endian variants are supported
* Compiler toolchain must provide 64-bit long double, not IBM
double-double or IEEE quad
* Compiler toolchain must use the new (ELFv2) ABI regardless of
whether it is for little or big endian
I think gcc configuration should default to --with-abi=elfv2 on
powerpc64-*-linux-*musl* target.
* Configuring GCC with:
* --host=powerpc64-unknown-linux-gnu
* --target=powerpc64-unknown-linux-musl
* --build=powerpc64-unknown-linux-gnu
after that musl fails
checking whether linker accepts -lgcc_eh... yes
using compiler runtime libraries: -lgcc -lgcc_eh
checking preprocessor condition _CALL_ELF == 2... false
./configure: error: unsupported powerpc64 ABI
