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From: "izbyshev at ispras dot ru" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug driver/105355] New: -msmall-data-limit= unexpectedly accepts a
 separate argument
Date: Fri, 22 Apr 2022 23:20:28 +0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=3D105355

            Bug ID: 105355
           Summary: -msmall-data-limit=3D unexpectedly accepts a separate
                    argument
           Product: gcc
           Version: 10.3.0
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: driver
          Assignee: unassigned at gcc dot gnu.org
          Reporter: izbyshev at ispras dot ru
  Target Milestone: ---
            Target: riscv64-linux-gnu

"msmall-data-limit=3D" is marked as both Joined and Separate at
https://gcc.gnu.org/git?p=3Dgcc.git;a=3Dblob;f=3Dgcc/config/riscv/riscv.opt=
;h=3D492aad1232404c2711811c3d04f2e02902d1b740;hb=3D7964ab6c364c410c34efe7ca=
2eba797d36525349#l95.

This is inconsistent with other "-m" options (which permit only joined
spelling) and allows strange commands like "riscv64-linux-gnu-gcc
-msmall-data-limit=3D 0 test.c".

Note that even if joined spelling is used by the user, GCC driver splits it=
 for
the frontend:

riscv64-linux-gnu-gcc -msmall-data-limit=3D0 test.c -###
[...]
 /usr/lib/gcc-cross/riscv64-linux-gnu/10/cc1 -quiet -imultilib . -imultiarch
riscv64-linux-gnu test.c -quiet -dumpbase test.c "-mno-small-data-limit=3D"=
 0
"-march=3Drv64imafdc" "-mabi=3Dlp64d" -auxbase test -fstack-protector-strong
-Wformat -Wformat-security -o /tmp/ccIJvDDO.s
[...]

This inconsistency unnecessarily complicates life of tools that parse compi=
ler
commands (e.g. for static analysis).=