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| author | Maciej W. Rozycki <macro@wdc.com> | 2020-09-29 01:20:01 +0100 |
|---|---|---|
| committer | Maciej W. Rozycki <macro@linux-mips.org> | 2020-09-29 01:20:01 +0100 |
| commit | 090d3f5ab390e74caa1f93b7d9f5074c62ba9d07 (patch) | |
| tree | 83e9f5f5ab2dd8e56d1b56e88ff0a43517815a06 /libgcc/config/riscv | |
| parent | e84761c6f32fa6e9b7dccc4245231a7ff4d7da61 (diff) | |
| download | gcc-090d3f5ab390e74caa1f93b7d9f5074c62ba9d07.zip gcc-090d3f5ab390e74caa1f93b7d9f5074c62ba9d07.tar.gz gcc-090d3f5ab390e74caa1f93b7d9f5074c62ba9d07.tar.bz2 | |
RISC-V/libgcc: Use `-fasynchronous-unwind-tables' for LIB2_DIVMOD_FUNCS
Use `-fasynchronous-unwind-tables' rather than `-fexceptions
-fnon-call-exceptions' in LIB2_DIVMOD_FUNCS compilation flags so as to
provide unwind tables for the affected functions while not pulling the
unwinder proper, which is not required here.
Beyond saving program space it fixes a RISC-V glibc build error due to
unsatisfied `malloc' and `free' references from the unwinder causing
link errors with `ld.so' where libgcc has been built at -O0.
libgcc/
* config/riscv/t-elf (LIB2_DIVMOD_EXCEPTION_FLAGS): New
variable.
Diffstat (limited to 'libgcc/config/riscv')
| -rw-r--r-- | libgcc/config/riscv/t-elf | 2 |
1 files changed, 2 insertions, 0 deletions
diff --git a/libgcc/config/riscv/t-elf b/libgcc/config/riscv/t-elf index dbc8f85..415e1ff 100644 --- a/libgcc/config/riscv/t-elf +++ b/libgcc/config/riscv/t-elf @@ -4,3 +4,5 @@ LIB2ADD += $(srcdir)/config/riscv/save-restore.S \ $(srcdir)/config/riscv/div.S \ $(srcdir)/config/riscv/atomic.c \ +# Avoid the full unwinder being pulled along with the division libcalls. +LIB2_DIVMOD_EXCEPTION_FLAGS := -fasynchronous-unwind-tables |