[Webkit-unassigned] [Bug 66818] New: Make the location of gperf configurable

[bugzilla-daemon at webkit.org]

https://bugs.webkit.org/show_bug.cgi?id=66818

           Summary: Make the location of gperf configurable
           Product: WebKit
           Version: 528+ (Nightly build)
          Platform: Unspecified
        OS/Version: Unspecified
            Status: UNCONFIRMED
          Severity: Normal
          Priority: P2
         Component: New Bugs
        AssignedTo: webkit-unassigned at lists.webkit.org
        ReportedBy: freebsd at chillt.de


FreeBSD provides gperf 2.7.2 at /usr/bin/gperf. The newer gperf 3.0.3 can optionally be installed at /usr/local/bin/gperf using FreeBSD's ports system.

Since WebKit requires gperf 3, the build scripts need to be pointed at /usr/local/bin/gperf instead of /usr/bin/gperf. The only way to achieve this right now is by modifying $PATH as the build scripts call gperf as follows:

system("gperf --key-positions=\"*\" ...)

Modifying $PATH is intrusive and may have unintended consequences. It would be safer and more elegant if build-webkit provided a --gperf argument that would allow the gperf binary to be specified. The default should be simply "gperf", preserving current behavior. Under FreeBSD, "/usr/local/bin/gperf" could be passed to ensure gperf 3 is used.

The scripts invoking gperf are:

Source/WebCore/make-hash-tools.pl
Source/WebCore/css/makeprop.pl
Source/WebCore/css/makevalues.pl

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