mirror of
git://gcc.gnu.org/git/gcc.git
synced 2025-03-19 07:00:25 +08:00
3a5d8ed231
This issue is found when we try to always define MULTILIB_DEFAULTS for -march and -mabi for RISC-V back-end, however `-print-multi-lib` will skip multi-lib setting if match any one of flag in MULTILIB_DEFAULTS, even some options are specified in the option list with '!'. e.g. We have default march=rv32i and mabi=ilp32. And we have following multi-lib set: ". !march=rv32i !march=rv32im !march=rv32imafc !mabi=ilp32 !mabi=ilp32f;" "rv32i/ilp32 march=rv32i !march=rv32im !march=rv32imafc mabi=ilp32 !mabi=ilp32f;" "rv32im/ilp32 !march=rv32i march=rv32im !march=rv32imafc mabi=ilp32 !mabi=ilp32f;" "rv32imafc/ilp32f !march=rv32i !march=rv32ic !march=rv32im march=rv32imafc !mabi=ilp32 mabi=ilp32f;" `-print-multi-lib` willl show `.` and `rv32imafc/ilp32f` only, because the mabi=ilp32 is matched, however there is `!march=rv32i` in `rv32im/ilp32`, so `rv32im/ilp32` should keep, because it reject march=rv32i. Note: This can be reproduced via following configure options with patch [1]: gcc/configure --target=riscv64-elf --with-arch=rv32i --with-abi=ilp32 \ --with-multilib-generator="rv32i-ilp32--;rv32im-ilp32--;rv32imafc-ilp32f--" [1] https://gcc.gnu.org/pipermail/gcc-patches/2020-November/559707.html gcc/ChangeLog: * gcc.c (print_multilib_info): Check default arguments not appeared in multi-lib option list with '!'
This directory contains the GNU Compiler Collection (GCC). The GNU Compiler Collection is free software. See the files whose names start with COPYING for copying permission. The manuals, and some of the runtime libraries, are under different terms; see the individual source files for details. The directory INSTALL contains copies of the installation information as HTML and plain text. The source of this information is gcc/doc/install.texi. The installation information includes details of what is included in the GCC sources and what files GCC installs. See the file gcc/doc/gcc.texi (together with other files that it includes) for usage and porting information. An online readable version of the manual is in the files gcc/doc/gcc.info*. See http://gcc.gnu.org/bugs/ for how to report bugs usefully. Copyright years on GCC source files may be listed using range notation, e.g., 1987-2012, indicating that every year in the range, inclusive, is a copyrightable year that could otherwise be listed individually.