| Nicholas Bishop |
05-21-2005 01:26 PM |
Autoconf's default CXXFLAGS
I've been learning about Autoconf, attempting to make "./configure && make" work correctly in some graphics software I'm writing. I'm confused about the effects of AC_PROG_CXX. It seems its primary purpose is to detect which C++ compiler to use, which makes sense. But then, according to the info page, it does this:
Quote:
If output variable `CXXFLAGS' was not already set, set it to `-g
-O2' for the GNU C++ compiler (`-O2' on systems where G++ does not
accept `-g'), or `-g' for other compilers.
|
This is a reasonable default, but what if I don't want either O2 optimization or -g? Of course the user of the configure script can export CXXFLAGS=-Ofoo and then AC_PROG_CXX leaves CXXFLAGS alone, but I would like to be able to provide my own reasonable default that would override AC_PROG_CXX, yet that could still be overridden by the user. Is there a good way to do this? |
