Date: Thu, 12 Sep 2013 20:13:59 -0600 From: Warner Losh <imp@bsdimp.com> To: Murray Stokely <murray@stokely.org> Cc: freebsd-toolchain@freebsd.org Subject: Re: Best autoconf recipe to use for modern FreeBSD Message-ID: <48EEFB2B-C6ED-497C-8CBF-8F044C3D96EE@bsdimp.com> In-Reply-To: <CAECWzi%2BaWyvO8JCg2GpyJ8OixRw1NkXtxsV0-U8DBGfeBCPgXQ@mail.gmail.com> References: <CAECWzi%2BxJPHaGDt84e1NpaezK6=H2sjFmVws0dgPG-mX03jhXA@mail.gmail.com> <C15E1ED4-CBBA-41D3-89B3-EBAAB42D8D2A@bsdimp.com> <CAECWzi%2BaWyvO8JCg2GpyJ8OixRw1NkXtxsV0-U8DBGfeBCPgXQ@mail.gmail.com>
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You might want to ask over in the ports... Since the ports system has a good mechanism for specifying a good compiler to use. I'm not sure that your approach will actually work, since it is a bit too fuzzy, but I'm sure others who know better will fill this in... Warner On Sep 12, 2013, at 8:10 PM, Murray Stokely wrote: > Well one can do that, yes, but by default any configure script is going to look for g++ first, find an ancient g++4.2 installed in /usr/bin/g++ and use that unless the user specifically sets CC. I'm a bit fuzzy on the timeline of FreeBSD's transition to clang over the last few years and so was hoping for a autoconf recipe that prefers the appropriate compiler (e.g. did we have clang on FreeBSD 7?) when the user doesn't manually specify CC. > > Given the preference for gcc in configure I guess I could just use something as simple as : > > if uname="FreeBSD" > # override configure preference for gcc since FreeBSD ships an ancient one. > AC_PROG_CC(clang llvm-gcc gcc) > AC_PROG_CXX(clang++ llvm-g++ g++) > else > AC_PROG_CC > AC_PROG_CXX > fi > > ? > > - Murray > > > > On Thu, Sep 12, 2013 at 6:56 PM, Warner Losh <imp@bsdimp.com> wrote: > > On Sep 12, 2013, at 7:32 PM, Murray Stokely wrote: > > > Some application software I use seems to prefer ancient gcc release or > > gcc46 from ports rather than clang. > > > > Is there a recommended autoconf recipe for third party software to use the > > right compilers across FreeBSD versions? > > I thought the compiler was passed with the CC variable to gnu configure... Or are you asking for something else? > > Warner >
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