git: customcc: Improve wrapper script efficiency and capabilities

[John Marino]

commit 571f588a5c6622ead0ed757b2884a76bb45bdb56
Author: John Marino <draco at marino.st>
Date:   Tue Oct 21 15:11:34 2014 +0200

    customcc: Improve wrapper script efficiency and capabilities
    
    The wrapper script had some deficies, such as:
     * awk called every invocation
     * cc and gcc treated the same
     * c++ and g++ treated the same
     * evals for variables not used
     * every invocation of c++ or g++ called cc -dumpmachine
     * g++ hardcoded to dports include scheme
     * no support for "CC" or "gcov" (both defined by base compilers)
    
    The update addresses these by:
     * awk eliminated by pushing INCOPT definition to defaults/compilers.conf
     * cc -dumpmachine eliminated during creation of defaults/compilers.conf
       It was only used for dports gcc, so with the assumption that the dports
       compiler matches the uname information (a decent assumption), this
       was predefined, yet overridable by /etc/compilers.conf
     * cc is treated separately from gcc
     * CC and c++ are treated the same but separately from g++
     * by wrapper default, gcc and g++ refer to base gcc4.7, but the default
       compilers.conf sets them to the same as the specified dports gcc
     * Support for clang, clang++, clang-cpp, CC, and gcov was added
     * Support for base clang, clang++, and clang-cpp was added in
       anticipation of bringing clang into base.
     * variables are only evaluated if used.
     * supports the ability to have gcc, g++, clang, clang++ point to base
       compilers while cc, c++, CC point to custom compiler.  However, the
       custom compiler can also point to any combination of cc, gcc, c++, and
       g++ and that's controllable by compilers.conf.
    
    The /etc/defaults/compilers.conf file was augmented and support for
    clang35 from dports added.  man 5 compilers.conf was edited accordingly
    with placeholders for <version>_CLANG, <version>_CLANGCXX and
    <version>_CLANGCPP which aren't applicable until clang comes into base.

Summary of changes:
 etc/defaults/compilers.conf     |  73 +++++++++++++++++++
 libexec/customcc/Makefile       |  15 +++-
 libexec/customcc/cc.sh          | 152 +++++++++++++++++++++++++++++++---------
 share/man/man5/compilers.conf.5 |  88 ++++++++++++++++-------
 4 files changed, 265 insertions(+), 63 deletions(-)

http://gitweb.dragonflybsd.org/dragonfly.git/commitdiff/571f588a5c6622ead0ed757b2884a76bb45bdb56


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