[patch #8818] AX_CXX_COMPILE_STDCXX: don't break "make CXXFLAGS=..."

[Joshua Judson Rosen]

URL:
  <http://savannah.gnu.org/patch/?8818>

                 Summary: AX_CXX_COMPILE_STDCXX: don't break "make
CXXFLAGS=..."
                 Project: GNU Autoconf Archive
            Submitted by: rozzin
            Submitted on: Wed 02 Dec 2015 09:54:10 PM GMT
                Priority: 5 - Normal
                  Status: None
             Assigned to: None
        Originator Email: 
             Open/Closed: Open
         Discussion Lock: Any

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Details:

Make C++ std-selection macros modify $(CXX), not $(CXXFLAGS).

Using $(CXXFLAGS) prevents users from being able to
rebuild with different CXXFLAGS (e.g.: to try out
different optimisations or to change debug levels)
unless they re-run ./configure with their CFLAGS.

This is more like what the mainline Autoconf macros do
(e.g.: AC_PROG_CC_C99, AC_PROG_CC_STD, etc. modify $(CC),
not $(CCFLAGS)), presmuably for much the same reasons:
if you need to specify a standard to the compiler,
it doesn't really make sense to separate that from
$(CC)/$(CXX) since $(CC)/$(CXX) aren't usable without it.




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File Attachments:


-------------------------------------------------------
Date: Wed 02 Dec 2015 09:54:10 PM GMT  Name:
0001-AX_CXX_COMPILE_STDCXX-don-t-break-make-CXXFLAGS.patch  Size: 6kB   By:
rozzin

<http://savannah.gnu.org/patch/download.php?file_id=35620>

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