[Bug 10251] New: error: 'asm' operand has impossible constraints using -O2 on android x86

bugzilla at busybox.net bugzilla at busybox.net
Mon Aug 28 10:18:55 UTC 2017


https://bugs.busybox.net/show_bug.cgi?id=10251

            Bug ID: 10251
           Summary: error: 'asm' operand has impossible constraints using
                    -O2 on android x86
           Product: Busybox
           Version: unspecified
          Hardware: Other
                OS: Other
            Status: NEW
          Severity: minor
          Priority: P5
         Component: Networking
          Assignee: unassigned at busybox.net
          Reporter: sherpya at netfarm.it
                CC: busybox-cvs at busybox.net
  Target Milestone: ---

If I try to build busybox for android x86 (gcc 4.9) I get:

networking/tls_pstm_montgomery_reduce.c: In function 'pstm_montgomery_reduce':
networking/tls_pstm_montgomery_reduce.c:66:1: error: 'asm' operand has
impossible constraints
 asm(                                                      \
 ^
networking/tls_pstm_montgomery_reduce.c:385:4: note: in expansion of macro
'INNERMUL'
    INNERMUL;
    ^


relaxing to requirement from =r to =g makes the file compilable, the problem
does not occur on debian gcc 32bit (4.9)

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