[patch #7601] ax_lib_sqlite3 could use C compiler to check for the library but not the C++ compiler

[Peter Simons]

Update of patch #7601 (project autoconf-archive):

                  Status:                    None => Need Info              
             Assigned to:                    None => simons                 

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Follow-up Comment #1:

Thank you very much for the patch. 

I noticed that it modifies use of CPPFLAGS to CFLAGS in a number of places,
and I wonder whether that is really what you intented to do. CPPFLAGS is for
flags that ought to be passed to *pre-processor*; those flags are used by both
the C and the C++ compiler. (C++-specific flags are stored in CXXFLAGS). So,
it shouldn't be necessary to use CFLAGS instead of CPPFLAGS to check for
sqlite3 with the C compiler. Arguably, it's even wrong to put "-I" options
into CFLAGS (although it is probably going to work).

In other words, switching use of CPPFLAGS to CFLAGS seems to be unnecessary
for what your patch is trying to accomplish.

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