GNU Autoconf Archive branch master updated. v2015.02.04-10-ged00931

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- Log -----------------------------------------------------------------
commit ed009311482f4499f263d8fbf2ecabf10093f2e2
Merge: 5ba75b6 0f75e40
Author: Peter Simons <address@hidden>
Date:   Thu Feb 5 13:50:21 2015 +0100

    Merge pull request #19 from amigadave/master
    
    ax_compiler_flags: Add C++ compiler warning checks

commit 0f75e40a50ad6d2c8067b6f0163661d37726e618
Author: David King <address@hidden>
Date:   Thu Feb 5 10:38:05 2015 +0000

    ax_compiler_flags: Adapt for AX_COMPILER_FLAGS_CXXFLAGS
    
    Use the new AX_COMPILER_FLAGS_CXXFLAGS macro in AX_COMPILER_FLAGS to
    test for available C++ compiler warning options, and AC_SUBST them as
    WARN_CXXFLAGS. Pass the EXTRA-*-CFLAGS variables to
    AX_COMPILER_FLAGS_CXXFLAGS, to avoid an explosion of arguments, and as
    most C++ warnings are also valid C warnings.

commit 6c542393749556c1db9606d12d614a7f5eb79b40
Author: David King <address@hidden>
Date:   Thu Feb 5 10:13:05 2015 +0000

    ax_compiler_flags_cxxflags: Add new macro for C++ compiler warnings
    
    Add a new AX_COMPILER_FLAGS_CXXFLAGS macro, which acts similarly to
    AX_COMPILER_FLAGS_CFLAGS, but for the C++ compiler.
    
    Modify the default set of warnings slightly, to remove
    -Waggregate-return, because using it makes it difficult to write
    idiomatic C++ code. Add -Wno-overloaded-virtual as a C++-specific
    warning. Remove C-specific warnings such as -Wnested-externs,
    -Wmissing-prototypes, -Wstrict-prototypes,
    -Wdeclaration-after-statement, -Wold-style-definition and
    -Wimplicit-function-declaration.

-----------------------------------------------------------------------

Summary of changes:
 m4/ax_compiler_flags.m4                            |   10 +++-
 ...ags_cflags.m4 => ax_compiler_flags_cxxflags.m4} |   57 ++++++++++----------
 2 files changed, 37 insertions(+), 30 deletions(-)
 copy m4/{ax_compiler_flags_cflags.m4 => ax_compiler_flags_cxxflags.m4} (68%)


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