[LLVMbugs] [Bug 18755] New: configure fails if GREP_OPTIONS contains --line-number (or -n)

[bugzilla-daemon at llvm.org]

http://llvm.org/bugs/show_bug.cgi?id=18755

            Bug ID: 18755
           Summary: configure fails if GREP_OPTIONS contains --line-number
                    (or -n)
           Product: Build scripts
           Version: trunk
          Hardware: Macintosh
                OS: MacOS X
            Status: NEW
          Severity: normal
          Priority: P
         Component: autoconf
          Assignee: unassignedbugs at nondot.org
          Reporter: kyle at omnigroup.com
                CC: llvmbugs at cs.uiuc.edu
    Classification: Unclassified

My .zshrc sets the GREP_OPTIONS environment variable to "--color
--line-number". This causes the configure script to fail with the following
error message:

checking for grep that handles long lines and -e... configure: error: no
acceptable grep could be found in
/usr/omni/bin/Scripts:/usr/omni/bin:/usr/omni/svn/bin:/usr/omni/sbin:/usr/local/bin:/usr/bin:/bin:/usr/sbin:/sbin:/usr/xpg4/bin
configure: error: ../../../projects/sample/configure failed for projects/sample

If the build system depends on grep behaving a certain way, it really ought to
run it in a custom environment and unset GREP_OPTIONS.

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