Re: lynx-dev autoconfigure and host_os dependent CC

[pg]

Hello, Lyncei,

I've researched this further.

In a recent note, address@hidden said:

> Date: Fri, 9 Apr 1999 23:25:36 -0600 (MDT)
> 
> I'd like to make the default C compiler dependent on the
> host operating system.
> 
> The original setting apparently happens in macro AC_PROG_CC, called
> out of configure.in.  But I don't know where to find the definition
> of this macro.
> 
In the TODO file with GNU autoconf 2.12, I find:

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

Question: at least one common UNIX variant has a "cc" that is old K&R
and "c89" for ANSI C.  Is there any reason why AC_PROG_CC couldn't
check for c89 before cc if it can't find gcc?

address@hidden (H. Peter Anvin)

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

(I wouldn't call this merely a "common UNIX variant"; it's straight POSIX.)

And in:

   Linkname: Mortice Kern Systems (MKS) Inc. - OS/390 OpenEdition --
            GNU Utilities Download Registration 
        URL: http://www.mks.com/s390/gnu/register.htm

I find the author has done much work adapting autoconf 2.12 to
OS/390.  (Lynx works without most of this, but it's probably all
necessary somewhere.)  But what I was wishing for was:

(Thanks to MKS; cite them if you integrate this :-)
==================================================================
diff -rc autoconf-2.12/acspecific.m4 mks/autoconf-2.12/acspecific.m4
*** autoconf-2.12/acspecific.m4 Tue Nov 19 22:10:49 1996
--- mks/autoconf-2.12/acspecific.m4     Wed Jan  7 07:43:27 1998
***************
*** 74,81 ****
  [AC_BEFORE([$0], [AC_PROG_CPP])dnl
  AC_CHECK_PROG(CC, gcc, gcc)
  if test -z "$CC"; then
!   AC_CHECK_PROG(CC, cc, cc, , , /usr/ucb/cc)
!   test -z "$CC" && AC_MSG_ERROR([no acceptable cc found in \$PATH])
  fi
 
  AC_PROG_CC_WORKS
--- 74,84 ----
  [AC_BEFORE([$0], [AC_PROG_CPP])dnl
  AC_CHECK_PROG(CC, gcc, gcc)
  if test -z "$CC"; then
!   AC_CHECK_PROG(CC, c89, c89)
!   if test -z "$CC"; then
!     AC_CHECK_PROG(CC, cc, cc, , , /usr/ucb/cc)
!     test -z "$CC" && AC_MSG_ERROR([no acceptable cc found in \$PATH])
!   fi
  fi

  AC_PROG_CC_WORKS