[llvm-bugs] [Bug 31358] New: Clang should support -march=armv7ve for gcc compatibility

via llvm-bugs llvm-bugs at lists.llvm.org
Mon Dec 12 16:19:27 PST 2016


            Bug ID: 31358
           Summary: Clang should support -march=armv7ve for gcc
           Product: clang
           Version: trunk
          Hardware: PC
                OS: Linux
            Status: NEW
          Severity: normal
          Priority: P
         Component: Frontend
          Assignee: unassignedclangbugs at nondot.org
          Reporter: manojgupta at google.com
                CC: llvm-bugs at lists.llvm.org
    Classification: Unclassified

gcc supports -march=armv7ve option for arm but this is not supported by clang.

Armv7ve description:
armv7ve add supports for ARMv7 virtualization extension, including instructions
such as integer divide instructions.

This makes build scripts  difficult to port to clang from gcc.


$ cat foo.c
int divide(int b, int c) {
    return b/c;

$ gcc  -march=armv7ve  -c foo.c # This works as expected

Compiling with clang fails.

$ clang -march=armv7ve -c foo.cc
clang-4.0: error: the clang compiler does not support '-march=armv7ve'

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