[llvm-bugs] [Bug 41163] New: clangd indexer fails when command contains -march

[via llvm-bugs]

https://bugs.llvm.org/show_bug.cgi?id=41163

            Bug ID: 41163
           Summary: clangd indexer fails when command contains -march
           Product: clang-tools-extra
           Version: unspecified
          Hardware: PC
                OS: Linux
            Status: NEW
          Severity: normal
          Priority: P
         Component: clangd
          Assignee: unassignedclangbugs at nondot.org
          Reporter: dupont.louis at ireq.ca
                CC: llvm-bugs at lists.llvm.org

Created attachment 21636
  --> https://bugs.llvm.org/attachment.cgi?id=21636&action=edit
Sample project with both the ok (build) and failing (build2) build commands

clangd indexer fails when command contains "-march". For example when provided
with the following compile_commands.json:

[
{
  "directory": "/home/project/hello/build",
  "command": "/usr/bin/cc  -I/home/project/hello/inc -march=armv7e-m -o
CMakeFiles/hello.dir/src/hello.c.o   -c /home/project/hello/src/hello.c",
  "file": "/home/project/hello/src/hello.c"
}
]

clangd will create an empty .clangd/index folder. The folder content only
appears when "-march=armv7e-m" is removed from the command string. Observed
with:

clangd version 9.0.0-svn354959-1~exp1+0~20190227105110.828~1.gbpd90386

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